Sample: All Data Dataset: Joint Explanation - Electric Fields - Pitt - Spring 2007 Anon Student Id Session Id Time Time Zone Student Response Type Student Response Subtype Tutor Response Type Tutor Response Subtype Level(Group) Problem Name Step Name Attempt At Step Outcome Selection Action Input Feedback Text Feedback Classification Help Level Total # Hints Condition Name Condition Type KC(Default) KC Category(Default) School Class CF(score) CF(parse) S0704 S0704-Feb05-10-27-12 2007-02-05 10:27:19.0 US/Eastern DELETION FOR* FOR4C Vector-1 Delete label=NIL Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 10:30:02.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 CORRECT Vector-2 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=239 Self-explanation Control DRAW-FIELD-GIVEN-DIR 5 S0704 S0704-Feb05-10-27-12 2007-02-05 10:30:50.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 0 "E=14.3e+3 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 12 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0704 S0704-Feb05-10-27-12 2007-02-05 10:31:32.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 CORRECT Var-3 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Self-explanation Control DEFINE-CHARGE 20 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0704 S0704-Feb05-10-27-12 2007-02-05 10:32:55.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 INCORRECT Vector-4 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=186 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 19 S0704 S0704-Feb05-10-27-12 2007-02-05 10:33:11.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT Vector-4 label=F Do you really want the direction of that vector to be 22 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 10:33:15.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 HINT Think about how the direction of the electric force on the particle due to an unspecified agent is related to the direction of the electric field vector. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 10:33:35.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 4 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 10:33:41.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 5 HINT Because the charge of the particle is negative, use the force drawing tool (labeled F) to draw the electric force on the particle due to an unspecified agent in the opposite direction as the electric field at that location, namely 202 degrees. 4 4 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 14 S0704 S0704-Feb05-10-27-12 2007-02-05 10:33:41.0 US/Eastern DELETION FOR* FOR4C Vector-4 Delete label=F Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 10:34:24.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 6 CORRECT Vector-5 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=153 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 10:35:39.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 INCORRECT 1 "F=E*q" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 13 (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0704 S0704-Feb05-10-27-12 2007-02-05 10:35:44.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 2 HINT 1 Normally, this equation is written using an absolute value. 1 Self-explanation Control COMPO-PARALLEL-AXIS S0704 S0704-Feb05-10-27-12 2007-02-05 10:36:21.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 3 INCORRECT 1 "F=abs(E)*(q)" Self-explanation Control COMPO-PARALLEL-AXIS (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS E_REGION_UNSPECIFIED) Q_PARTICLE)) S0704 S0704-Feb05-10-27-12 2007-02-05 10:36:21.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 4 INCORRECT 1 "F=abs(E)*(q)" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS E_REGION_UNSPECIFIED) Q_PARTICLE)) S0704 S0704-Feb05-10-27-12 2007-02-05 10:36:23.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 5 HINT 1 You used F, which is the MAGNITUDE of the electric force on the particle at T0 due to an unspecified agent. Is that what you intended? 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0704 S0704-Feb05-10-27-12 2007-02-05 10:36:37.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 6 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 8 S0704 S0704-Feb05-10-27-12 2007-02-05 10:37:43.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 7 CORRECT 1 "F=E*abs(q)" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 43 (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED (ABS Q_PARTICLE))) S0704 S0704-Feb05-10-27-12 2007-02-05 10:37:59.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 2 "F" Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 10:38:17.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 "0.113 N" Self-explanation Control 68 S0704 S0704-Feb05-10-27-12 2007-02-05 10:44:01.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 S0704 S0704-Feb05-10-27-12 2007-02-05 10:44:43.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-668 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60 e-19 C" Self-explanation Control DEFINE-CHARGE 22 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0704 S0704-Feb05-10-27-12 2007-02-05 10:45:06.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 INCORRECT Var-669 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11 e -31 kg" Syntax error in m=9.11 e -31 kg 1 Self-explanation Control DEFINE-MASS 21 ? S0704 S0704-Feb05-10-27-12 2007-02-05 10:45:16.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 2 HINT The equation or the units in it are not in a recognizable form. 2 Self-explanation Control DEFINE-MASS S0704 S0704-Feb05-10-27-12 2007-02-05 10:45:33.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 3 HINT Though I can't tell exactly what the mistake is, a few common sources of errors are: (a) Unit symbols are case sensitive. (b) Multiplication always requires an explicit multiplication sign: W=m*g, NOT W=mg. (c) Units attach only to numbers, not to variables or expressions. 3 3 Self-explanation Control DEFINE-MASS S0704 S0704-Feb05-10-27-12 2007-02-05 10:46:12.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 4 INCORRECT Var-669 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e -31 kg" Syntax error in m=9.11e -31 kg 1 Self-explanation Control DEFINE-MASS 20 ? S0704 S0704-Feb05-10-27-12 2007-02-05 10:46:12.0 US/Eastern DELETION ELEC* ELEC1C Var-669 Delete label=m Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 10:46:51.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 5 CORRECT Var-670 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31kg" Self-explanation Control DEFINE-MASS 28 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0704 S0704-Feb05-10-27-12 2007-02-05 10:46:51.0 US/Eastern DELETION ELEC* ELEC1C Vector-671 Delete label=NIL Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 10:47:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-672 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=0;mag=257 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 10:47:45.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (DRAW-AXES 0) 1 HINT Vector-672 label=E Do you really want the direction of that vector to be 0 degrees? 1 Self-explanation Control DRAW-COMPO-FORM-AXES S0704 S0704-Feb05-10-27-12 2007-02-05 10:47:51.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (DRAW-AXES 0) 2 HINT You can determine the direction of the electric field at the region due to an unspecified agent from the problem statement 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 10:47:51.0 US/Eastern DELETION ELEC* ELEC1C Vector-672 Delete label=E Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 10:47:51.0 US/Eastern DELETION ELEC* ELEC1C Var-673 Delete label=NIL Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 10:47:51.0 US/Eastern DELETION ELEC* ELEC1C 0 Delete Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 10:50:14.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (DRAW-AXES 0) 3 HINT It is now a good idea for you to draw an axis. This will help to ground your work and be useful later on in the process. 1 Self-explanation Control DRAW-COMPO-FORM-AXES S0704 S0704-Feb05-10-27-12 2007-02-05 10:50:14.0 US/Eastern DELETION ELEC* ELEC1C Axes-674 Delete label=NIL Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 10:50:14.0 US/Eastern DELETION ELEC* ELEC1C Axes-675 Delete label=NIL Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 10:50:14.0 US/Eastern DELETION ELEC* ELEC1C Axes-676 Delete label=NIL Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 10:51:02.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 4 CORRECT Axes-677 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-COMPO-FORM-AXES 38 S0704 S0704-Feb05-10-27-12 2007-02-05 10:51:26.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 5 CORRECT Axes-677 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-COMPO-FORM-AXES S0704 S0704-Feb05-10-27-12 2007-02-05 10:51:34.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 10:52:00.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 HINT #.(wb-quant '(define-variable "E" |NIL| |E-field| |region| |NIL| |Unspecified| NIL "") 'mag) Yes. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 10:53:39.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 HINT charge-force-efield-mag Yep. You should be introducing a variable for the magnitude of the electric field at the region due to an unspecified agent. 3 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 10:53:51.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 HINT You can determine the direction of the electric field at the region due to an unspecified agent from the problem statement 4 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 10:54:00.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 6 HINT Use the electric field drawing tool to draw the electric field at the region due to an unspecified agent in the given direction of 270 degrees. 5 5 Self-explanation Control DRAW-FIELD-GIVEN-DIR 33 S0704 S0704-Feb05-10-27-12 2007-02-05 10:57:49.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 7 CORRECT Vector-678 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=132 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 10:58:28.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 1 INCORRECT 0 "F=abs(q)* E" Undefined variable: F 1 Self-explanation Control DRAW-NET-FORCE-ZERO S0704 S0704-Feb05-10-27-12 2007-02-05 10:58:33.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 2 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DRAW-NET-FORCE-ZERO S0704 S0704-Feb05-10-27-12 2007-02-05 10:58:33.0 US/Eastern DELETION ELEC* ELEC1C Vector-679 Delete label=NIL Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 11:00:49.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 3 CORRECT Vector-680 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-NET-FORCE-ZERO S0704 S0704-Feb05-10-27-12 2007-02-05 11:00:52.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 4 HINT 0 Undefined variable: F 1 Self-explanation Control DRAW-NET-FORCE-ZERO S0704 S0704-Feb05-10-27-12 2007-02-05 11:01:02.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 5 HINT Why don't you continue with the solution by working on applying the definition of electric field magnitude at the electron at T0. 1 Self-explanation Control DRAW-NET-FORCE-ZERO S0704 S0704-Feb05-10-27-12 2007-02-05 11:01:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 6 HINT A good step would be introducing a variable for the magnitude of the electric force on the electron at T0 due to an unspecified agent. 2 Self-explanation Control DRAW-NET-FORCE-ZERO S0704 S0704-Feb05-10-27-12 2007-02-05 11:01:13.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 7 HINT Think about how the direction of the electric force on the electron due to an unspecified agent is related to the direction of the electric field vector. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 11:01:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 8 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 4 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 11:01:32.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 9 HINT Because the charge of the electron is negative, use the force drawing tool (labeled F) to draw the electric force on the electron due to an unspecified agent in the opposite direction as the electric field at that location, namely 90 degrees. 5 5 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 28 S0704 S0704-Feb05-10-27-12 2007-02-05 11:01:32.0 US/Eastern DELETION ELEC* ELEC1C Vector-681 Delete label=NIL Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 11:02:35.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 10 CORRECT Vector-680 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-NET-FORCE-ZERO S0704 S0704-Feb05-10-27-12 2007-02-05 11:02:35.0 US/Eastern DELETION ELEC* ELEC1C Vector-680 Delete label=F Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 11:02:54.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-682 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=90 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 11:03:00.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 HINT 0 Undefined variable: F 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0704 S0704-Feb05-10-27-12 2007-02-05 11:03:01.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 23 S0704 S0704-Feb05-10-27-12 2007-02-05 11:03:15.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 3 HINT Why don't you continue working on applying the definition of electric field magnitude at the electron at T0. 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0704 S0704-Feb05-10-27-12 2007-02-05 11:03:18.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 4 HINT What is the relationship between the force, the charge and the electric field? 2 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0704 S0704-Feb05-10-27-12 2007-02-05 11:03:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 5 HINT The electric field vector at a location is defined as electric force vector per unit charge. That is, the electric force vector that a test charge would undergo if placed there, divided by the size of the charge. This definition can be applied to relate force and field magnitudes. 3 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0704 S0704-Feb05-10-27-12 2007-02-05 11:04:17.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 6 HINT Write the equation F = (ABS q) * E 4 4 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 18 S0704 S0704-Feb05-10-27-12 2007-02-05 11:04:32.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 7 CORRECT 0 "F=ABS(q)* E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 53 (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0704 S0704-Feb05-10-27-12 2007-02-05 11:04:50.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 HINT Why don't you continue with the solution by working on applying Newton's second law to the electron at T0. 1 Self-explanation Control DRAW-WEIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:04:55.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 2 HINT Your goal should be drawing a free-body diagram for the electron at T0. 2 Self-explanation Control DRAW-WEIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:05:00.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 3 HINT Your goal should be drawing all the forces acting on the electron at T0. 3 Self-explanation Control DRAW-WEIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:05:11.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 4 HINT Notice that the electron is near the earth. 4 Self-explanation Control DRAW-WEIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:05:13.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 5 HINT When an object is near a planet, the planet exerts a weight force on the object. 5 Self-explanation Control DRAW-WEIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:05:16.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 6 HINT Because the electron is near the planet the earth, the planet exerts a weight force on it, so use the force drawing tool to draw a force on the electron due to the earth of type weight at T0. 6 6 Self-explanation Control DRAW-WEIGHT 48 S0704 S0704-Feb05-10-27-12 2007-02-05 11:06:17.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 7 CORRECT Vector-683 label="F02";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=128 Self-explanation Control DRAW-WEIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:06:26.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 1 HINT Why don't you continue working on applying Newton's second law to the electron at T0. 1 Self-explanation Control ACCEL-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:06:29.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 2 HINT Notice that the electron is at rest at T0. 2 Self-explanation Control ACCEL-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:06:31.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 3 HINT If a body is at rest throughout some time interval, its average acceleration during that interval is zero. 3 Self-explanation Control ACCEL-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:06:34.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 4 HINT Because the electron is at rest at T0, use the acceleration tool to draw a zero-length acceleration vector for it. 4 4 Self-explanation Control ACCEL-AT-REST 43 S0704 S0704-Feb05-10-27-12 2007-02-05 11:06:55.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 5 CORRECT Vector-684 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Self-explanation Control ACCEL-AT-REST 44 S0704 S0704-Feb05-10-27-12 2007-02-05 11:07:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 1 INCORRECT 1 "F=m*a" Self-explanation Control WRITE-IMPLICIT-EQN 43 (= Fe_ELECTRON_UNSPECIFIED_1 (* m_ELECTRON a_ELECTRON_1)) S0704 S0704-Feb05-10-27-12 2007-02-05 11:07:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 2 INCORRECT 1 "F=m*a" Self-explanation Control COMPO-PARALLEL-AXIS 43 (= Fe_ELECTRON_UNSPECIFIED_1 (* m_ELECTRON a_ELECTRON_1)) S0704 S0704-Feb05-10-27-12 2007-02-05 11:07:22.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 3 HINT 1 You used F, which is the MAGNITUDE of the electric force on the electron at T0 due to an unspecified agent. Is that what you intended? 1 Self-explanation Control WRITE-NFL-COMPO S0704 S0704-Feb05-10-27-12 2007-02-05 11:07:26.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 4 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Self-explanation Control WRITE-NFL-COMPO 38 S0704 S0704-Feb05-10-27-12 2007-02-05 11:07:56.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 5 INCORRECT 1 "F02_y=m*a" Self-explanation Control WRITE-NFL-COMPO (= Yc_Fw_ELECTRON_EARTH_1_0 (* m_ELECTRON a_ELECTRON_1)) S0704 S0704-Feb05-10-27-12 2007-02-05 11:07:58.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 6 HINT 1 What equation do you wish to write? 1 Self-explanation Control WRITE-NFL-COMPO S0704 S0704-Feb05-10-27-12 2007-02-05 11:08:19.0 US/Eastern HINT_REQUEST Choose-Equation HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 7 HINT (charge-force-efield ((?axis . y))) Equations of that type appear within the problem solution. You should write the equation in the form F_y = q*E_y using your own variables. If you do not want to write this equation and are not sure what to do, why don't you call Light-Bulb-Help. 2 2 Self-explanation Control WRITE-NFL-COMPO 33 S0704 S0704-Feb05-10-27-12 2007-02-05 11:08:36.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 8 HINT Why don't you continue working on applying Newton's second law to the electron at T0. 1 Self-explanation Control WRITE-NFL-COMPO S0704 S0704-Feb05-10-27-12 2007-02-05 11:08:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 9 HINT You can apply Newton's second law to the electron. Note that the electron is not accelerating at T0. 2 Self-explanation Control WRITE-NFL-COMPO S0704 S0704-Feb05-10-27-12 2007-02-05 11:08:42.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 10 HINT Newton's second law F = m*a states that the net force on an object = the object's mass times its acceleration. In this case the acceleration is zero so you know the sum of all forces on the object must be zero. This vector principle can be applied component-wise to require that the force components in any direction sum to zero. 3 Self-explanation Control WRITE-NFL-COMPO S0704 S0704-Feb05-10-27-12 2007-02-05 11:08:51.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 11 HINT Because the electron is not accelerating at T0, write Newton's second law as F02_y + F_y = 0 4 4 Self-explanation Control WRITE-NFL-COMPO 28 S0704 S0704-Feb05-10-27-12 2007-02-05 11:09:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 12 CORRECT 1 "F02_y+F_y=0" Self-explanation Control WRITE-NFL-COMPO (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0) S0704 S0704-Feb05-10-27-12 2007-02-05 11:09:33.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the electric force on the electron at T0 due to an unspecified agent onto the y axis. 1 Self-explanation Control COMPO-PARALLEL-AXIS S0704 S0704-Feb05-10-27-12 2007-02-05 11:09:40.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 2 HINT Since the electric force on the electron at T0 due to an unspecified agent at T0 lies along the y axis, it has a non-zero component along that axis. 2 Self-explanation Control COMPO-PARALLEL-AXIS S0704 S0704-Feb05-10-27-12 2007-02-05 11:09:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Self-explanation Control COMPO-PARALLEL-AXIS S0704 S0704-Feb05-10-27-12 2007-02-05 11:10:38.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 4 HINT Since the electric force on the electron at T0 due to an unspecified agent at T0 lies along the y axis and points in the + y direction, write the equation F_y = F. 4 4 Self-explanation Control COMPO-PARALLEL-AXIS 23 S0704 S0704-Feb05-10-27-12 2007-02-05 11:10:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 5 CORRECT 2 "F_y=F" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 Fe_ELECTRON_UNSPECIFIED_1) S0704 S0704-Feb05-10-27-12 2007-02-05 11:11:12.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the weight force on the electron at T0 due to the earth onto the y axis. 1 Self-explanation Control COMPO-PARALLEL-AXIS S0704 S0704-Feb05-10-27-12 2007-02-05 11:11:36.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 2 HINT Since the weight force on the electron at T0 due to the earth at T0 lies along the y axis, it has a non-zero component along that axis. 2 Self-explanation Control COMPO-PARALLEL-AXIS S0704 S0704-Feb05-10-27-12 2007-02-05 11:11:40.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Self-explanation Control COMPO-PARALLEL-AXIS S0704 S0704-Feb05-10-27-12 2007-02-05 11:12:27.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 4 HINT Since the weight force on the electron at T0 due to the earth at T0 lies along the y axis and points in the - y direction, write the equation F02_y = - F02. 4 4 Self-explanation Control COMPO-PARALLEL-AXIS 18 S0704 S0704-Feb05-10-27-12 2007-02-05 11:12:55.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 5 CORRECT 3 "F02_y=-F02" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1)) S0704 S0704-Feb05-10-27-12 2007-02-05 11:13:09.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 HINT Why don't you continue with the solution by working on applying the Weight law on the electron. 1 Self-explanation Control WT-LAW S0704 S0704-Feb05-10-27-12 2007-02-05 11:13:14.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 2 HINT Try applying the weight law. 2 Self-explanation Control WT-LAW S0704 S0704-Feb05-10-27-12 2007-02-05 11:14:28.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 3 HINT The weight law for a body is W=m*g, where W is the magnitude of the weight force acting on the body, m is the body's mass and g is the gravitational acceleration at the surface of the planet. 3 Self-explanation Control WT-LAW S0704 S0704-Feb05-10-27-12 2007-02-05 11:14:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 4 INCORRECT 4 "W=m*g" Undefined variable: W 1 Self-explanation Control WT-LAW S0704 S0704-Feb05-10-27-12 2007-02-05 11:14:50.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 5 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control WT-LAW S0704 S0704-Feb05-10-27-12 2007-02-05 11:15:36.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 6 HINT 4 Undefined variable: W 1 Self-explanation Control WT-LAW S0704 S0704-Feb05-10-27-12 2007-02-05 11:15:38.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 7 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control WT-LAW 13 S0704 S0704-Feb05-10-27-12 2007-02-05 11:15:53.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 8 HINT Why don't you continue working on applying the Weight law on the electron. 1 Self-explanation Control WT-LAW S0704 S0704-Feb05-10-27-12 2007-02-05 11:15:55.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 9 HINT Try applying the weight law. 2 Self-explanation Control WT-LAW S0704 S0704-Feb05-10-27-12 2007-02-05 11:15:56.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 10 HINT The weight law for a body is W=m*g, where W is the magnitude of the weight force acting on the body, m is the body's mass and g is the gravitational acceleration at the surface of the planet. 3 Self-explanation Control WT-LAW S0704 S0704-Feb05-10-27-12 2007-02-05 11:15:58.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 11 HINT Write F02=m*g 4 4 Self-explanation Control WT-LAW 8 S0704 S0704-Feb05-10-27-12 2007-02-05 11:16:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 12 CORRECT 4 "F02=m*g" Self-explanation Control WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0704 S0704-Feb05-10-27-12 2007-02-05 11:17:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 6 CORRECT 5 "E=F02/ABS(q)" Self-explanation Control COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0704 S0704-Feb05-10-27-12 2007-02-05 11:17:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 13 CORRECT 5 "E=F02/ABS(q)" Self-explanation Control WRITE-NFL-COMPO (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0704 S0704-Feb05-10-27-12 2007-02-05 11:17:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 6 CORRECT 5 "E=F02/ABS(q)" Self-explanation Control COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0704 S0704-Feb05-10-27-12 2007-02-05 11:17:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 8 CORRECT 5 "E=F02/ABS(q)" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0704 S0704-Feb05-10-27-12 2007-02-05 11:17:44.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 CORRECT 6 "E" Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 11:18:32.0 US/Eastern ATTEMPT Answer RESULT Unsolicited ELEC* ELEC1C Answer-1 1 INCORRECT Answer-1 "5.58 e -11 N/C" Syntax error in E=5.58 e -11 N/C 1 Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 11:18:55.0 US/Eastern ATTEMPT Answer RESULT Unsolicited ELEC* ELEC1C Answer-1 2 INCORRECT Answer-1 "5.58e -11N/C" Syntax error in E=5.58e -11N/C 1 Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 11:18:59.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C Unknown 1 HINT The equation or the units in it are not in a recognizable form. 2 Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 11:19:18.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 3 CORRECT Answer-1 "5.58e-11N/C" Self-explanation Control 30 S0704 S0704-Feb05-10-27-12 2007-02-05 11:41:39.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 CORRECT System-1 label="p";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 S0704 S0704-Feb05-10-27-12 2007-02-05 11:42:30.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-2 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0;dir=90;mag=70 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 12 S0704 S0704-Feb05-10-27-12 2007-02-05 11:42:36.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (DRAW-AXES 0) 1 HINT Vector-2 label=F You don't need to draw the force at T0. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-UNROTATED-AXES S0704 S0704-Feb05-10-27-12 2007-02-05 11:42:46.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (DRAW-AXES 0) 2 HINT It is now a good idea for you to draw an axis. This will help to ground your work and be useful later on in the process. 1 Self-explanation Control DRAW-UNROTATED-AXES S0704 S0704-Feb05-10-27-12 2007-02-05 11:42:57.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 3 CORRECT Axes-3 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 23 S0704 S0704-Feb05-10-27-12 2007-02-05 11:42:57.0 US/Eastern DELETION ELEC* ELEC3A Vector-2 Delete label=F Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 11:43:44.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-4 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=74 Self-explanation Control DRAW-FIELD-GIVEN-DIR 24 S0704 S0704-Feb05-10-27-12 2007-02-05 11:43:56.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 2 CORRECT Vector-4 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=74 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 11:44:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 0 "E=2.00e+4 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 28 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0704 S0704-Feb05-10-27-12 2007-02-05 11:44:51.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-5 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Self-explanation Control DEFINE-CHARGE 32 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0704 S0704-Feb05-10-27-12 2007-02-05 11:45:19.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-6 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 36 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0704 S0704-Feb05-10-27-12 2007-02-05 11:46:29.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-7 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.50 cm" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 35 S0704 S0704-Feb05-10-27-12 2007-02-05 11:46:32.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Var-7 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:46:41.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:46:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT You should draw the displacement of the electron from T0 to T1. You can click on the light bulb button or 'explain further' for suggestions about how to solve the problem using it. 3 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:47:04.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 CORRECT Vector-8 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=70 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:47:18.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 1 "d=1.50 cm " Self-explanation Control WRITE-KNOWN-VALUE-EQN 39 (= s_ELECTRON_12 (DNUM 1.5 cm)) S0704 S0704-Feb05-10-27-12 2007-02-05 11:47:59.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 INCORRECT Var-9 label="v";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T1;value="" Self-explanation Control DRAW-VELOCITY-STRAIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:48:04.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 INCORRECT 2 "v" Unable to solve for v. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 11:48:09.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:48:25.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 3 HINT #.(wb-quant '(define-variable "v" |instantaneous| |speed| |electron| |T1| |NIL| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. 2 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:49:07.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 4 HINT #.(wb-quant '(define-variable "v" |instantaneous| |velocity| |electron| |T1| |NIL| NIL "") 'mag) That's right. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 3 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:50:05.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 5 HINT (lk-no-vf ((?axis . x))) No application of that principle on the X axis appear in a solution to this problem. However, that principle can be applied on the Y axis. Unfortunately, they cannot be used to start the solution. What is the first principle application that you wish to work on? You should look for a principle that is related to the sought quantity indirectly. 4 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:50:31.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 6 HINT (lk-no-s ((?axis . y))) Yep. Your goal should be choosing a particular kinematic equation containing the duration of the interval from T0 to T1. 5 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:50:35.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 7 HINT Try drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 6 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:50:48.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 8 HINT Notice that the electron is momentarily at rest at T0. 7 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:50:53.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 9 HINT When an object is at rest even momentarily, its velocity at that moment is zero. 8 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:50:56.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 10 HINT Because the electron is at rest at T0, use the velocity tool to draw a zero-length velocity vector for it. 9 9 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST 34 S0704 S0704-Feb05-10-27-12 2007-02-05 11:51:32.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 11 INCORRECT Vector-10 label="v0";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=60 Self-explanation Control DRAW-VELOCITY-STRAIGHT 33 S0704 S0704-Feb05-10-27-12 2007-02-05 11:51:39.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 HINT Vector-10 label=v0 You don't need to draw the velocity at T0. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:51:54.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 2 HINT If you click on 'explain more', I'll tell you a correct entry to make. However, you'd learn more if you figure it out yourself, perhaps with the aid of the light bulb button's hints. 2 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:51:54.0 US/Eastern DELETION ELEC* ELEC3A Var-7 Delete label=s Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 11:51:54.0 US/Eastern DELETION ELEC* ELEC3A Var-9 Delete label=v Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 11:51:54.0 US/Eastern DELETION ELEC* ELEC3A Vector-10 Delete label=v0 Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 11:52:22.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 3 HINT Why don't you continue with the solution by working on applying the definition of average acceleration on the electron from T0 to T1. 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:52:27.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 4 HINT Try choosing a particular kinematic equation containing the duration of the interval from T0 to T1. 2 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:52:40.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 5 HINT Your goal should be drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 3 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:54:04.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 6 HINT Why don't you continue working on applying the definition of average acceleration on the electron from T0 to T1. 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:54:25.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 7 HINT Why don't you continue working on applying the definition of average acceleration on the electron from T0 to T1. 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:54:27.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 8 HINT Try choosing a particular kinematic equation containing the duration of the interval from T0 to T1. 2 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:54:43.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 9 HINT A good step would be drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 3 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:54:46.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 10 HINT Notice that the electron is momentarily at rest at T0. 4 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:54:47.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 11 HINT When an object is at rest even momentarily, its velocity at that moment is zero. 5 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:54:52.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 12 HINT Because the electron is at rest at T0, use the velocity tool to draw a zero-length velocity vector for it. 6 6 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST 28 S0704 S0704-Feb05-10-27-12 2007-02-05 11:54:52.0 US/Eastern DELETION ELEC* ELEC3A 2 Delete Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 11:55:21.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 13 CORRECT Vector-11 label="v";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0704 S0704-Feb05-10-27-12 2007-02-05 11:55:51.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 12 CORRECT Vector-12 label="v01";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=39 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0704 S0704-Feb05-10-27-12 2007-02-05 11:56:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-13 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=NIL;mag=0 Self-explanation Control DRAW-ACCEL-SPEED-UP S0704 S0704-Feb05-10-27-12 2007-02-05 11:57:24.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT 2 "F=ABS(q)*E" Undefined variable: F 1 Self-explanation Control DRAW-ACCEL-SPEED-UP S0704 S0704-Feb05-10-27-12 2007-02-05 11:57:29.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DRAW-ACCEL-SPEED-UP S0704 S0704-Feb05-10-27-12 2007-02-05 11:58:10.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Why don't you continue working on applying the definition of average acceleration on the electron from T0 to T1. 1 Self-explanation Control DRAW-ACCEL-SPEED-UP S0704 S0704-Feb05-10-27-12 2007-02-05 11:58:13.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT Your goal should be choosing a particular kinematic equation containing the duration of the interval from T0 to T1. 2 Self-explanation Control DRAW-ACCEL-SPEED-UP S0704 S0704-Feb05-10-27-12 2007-02-05 11:58:18.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT A good step would be drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 3 Self-explanation Control DRAW-ACCEL-SPEED-UP S0704 S0704-Feb05-10-27-12 2007-02-05 11:58:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 HINT Notice that the electron is moving in a straight line and speeding up from T0 to T1 4 Self-explanation Control DRAW-ACCEL-SPEED-UP S0704 S0704-Feb05-10-27-12 2007-02-05 11:58:25.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG MINILESSON ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 HINT mini_speedup_accel.htm 5 5 Self-explanation Control DRAW-ACCEL-SPEED-UP S0704 S0704-Feb05-10-27-12 2007-02-05 11:58:41.0 US/Eastern HINT_REQUEST Choose- HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 HINT close-lesson Do you wish for more hints? 6 Self-explanation Control DRAW-ACCEL-SPEED-UP S0704 S0704-Feb05-10-27-12 2007-02-05 11:58:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 10 HINT Because the electron is speeding up while moving in a straight line with direction 90 degrees, you should use the acceleration tool to draw an acceleration for it from T0 to T1 at direction 90 degrees. 7 7 Self-explanation Control DRAW-ACCEL-SPEED-UP 23 S0704 S0704-Feb05-10-27-12 2007-02-05 11:58:45.0 US/Eastern DELETION ELEC* ELEC3A Vector-13 Delete label=a Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 11:59:31.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 11 CORRECT Vector-14 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=83 Self-explanation Control DRAW-ACCEL-SPEED-UP S0704 S0704-Feb05-10-27-12 2007-02-05 11:59:53.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 12 CORRECT Vector-14 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=83 Self-explanation Control DRAW-ACCEL-SPEED-UP S0704 S0704-Feb05-10-27-12 2007-02-05 12:00:55.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 2 "m*a=ABS(q)*E" Self-explanation Control (= (* m_ELECTRON a_ELECTRON_12) (* (ABS Q_ELECTRON) E_REGION_PLATES)) S0704 S0704-Feb05-10-27-12 2007-02-05 12:00:55.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT ELEC* ELEC3A CALC_REQUEST 2 CORRECT 3 "m*a=ABS(q)*E" Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 12:01:04.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 3 CORRECT 4 "a" Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 12:02:26.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 4 CORRECT 5 "a" Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 12:02:31.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 1 HINT Why don't you continue working on applying the definition of average acceleration on the electron from T0 to T1. 1 Self-explanation Control DEFINE-DURATION S0704 S0704-Feb05-10-27-12 2007-02-05 12:02:32.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 2 HINT Try writing an constant acceleration equation in terms of vector components along the Y axis. 2 Self-explanation Control DEFINE-DURATION S0704 S0704-Feb05-10-27-12 2007-02-05 12:02:44.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 3 HINT Why don't you continue working on applying the definition of average acceleration on the electron from T0 to T1. 1 Self-explanation Control DEFINE-DURATION S0704 S0704-Feb05-10-27-12 2007-02-05 12:03:34.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 4 HINT Your goal should be writing an constant acceleration equation in terms of vector components along the Y axis. 2 Self-explanation Control DEFINE-DURATION S0704 S0704-Feb05-10-27-12 2007-02-05 12:03:41.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 5 HINT Your goal should be introducing a variable for the duration of the interval from T0 to T1. 3 Self-explanation Control DEFINE-DURATION S0704 S0704-Feb05-10-27-12 2007-02-05 12:03:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 6 HINT Use the variable definition tool (under 'variable' on the top menu bar) to define a variable for the duration of from T0 to T1. 4 4 Self-explanation Control DEFINE-DURATION 18 S0704 S0704-Feb05-10-27-12 2007-02-05 12:04:24.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 7 CORRECT Var-15 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Self-explanation Control DEFINE-DURATION S0704 S0704-Feb05-10-27-12 2007-02-05 12:04:28.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 1 HINT Why don't you continue working on applying the definition of average acceleration on the electron from T0 to T1. 1 Self-explanation Control WRITE-LK-NO-S-COMPO S0704 S0704-Feb05-10-27-12 2007-02-05 12:04:31.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 2 HINT Try writing an constant acceleration equation in terms of vector components along the Y axis. 2 Self-explanation Control WRITE-LK-NO-S-COMPO S0704 S0704-Feb05-10-27-12 2007-02-05 12:04:36.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 3 HINT Can you think of an equation that relates the components of average acceleration to those of the initial velocity, final velocity, and duration? 3 Self-explanation Control WRITE-LK-NO-S-COMPO S0704 S0704-Feb05-10-27-12 2007-02-05 12:05:02.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 4 HINT Acceleration is the rate of change of velocity. The average acceleration vector over some time is defined as the difference between initial and final velocity vectors divided by the duration. This definition can be be applied component-wise to relate v01_y, v_y, a_y and t 4 Self-explanation Control WRITE-LK-NO-S-COMPO S0704 S0704-Feb05-10-27-12 2007-02-05 12:05:10.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 5 HINT Write the equation v01_y = v_y + a_y*t 5 5 Self-explanation Control WRITE-LK-NO-S-COMPO 13 S0704 S0704-Feb05-10-27-12 2007-02-05 12:05:50.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 6 CORRECT 6 "v01_y=v_y+a_y*t" Self-explanation Control WRITE-LK-NO-S-COMPO 22 (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12))) S0704 S0704-Feb05-10-27-12 2007-02-05 12:06:04.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Why don't you continue with the solution by working on applying Newton's second law to the electron from T0 to T1. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 12:06:08.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT You should be drawing a free-body diagram for the electron from T0 to T1. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 12:06:12.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Try drawing all the forces acting on the electron from T0 to T1. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 12:06:14.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT Think about how the direction of the electric force on the electron due to the plates is related to the direction of the electric field vector. 4 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 12:06:26.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 5 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 12:06:30.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 7 HINT Because the charge of the electron is negative, use the force drawing tool (labeled F) to draw the electric force on the electron due to the plates in the opposite direction as the electric field at that location, namely 90 degrees. 6 6 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 17 S0704 S0704-Feb05-10-27-12 2007-02-05 12:07:00.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 8 CORRECT Vector-16 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=83 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0704 S0704-Feb05-10-27-12 2007-02-05 12:07:04.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A No Intepretation 2 HINT Why don't you continue working on applying Newton's second law to the electron from T0 to T1. 1 Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 12:07:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 3 TRUE_BUT_IRRELEVANT 7 "F=m*a" Self-explanation Control (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) S0704 S0704-Feb05-10-27-12 2007-02-05 12:07:26.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 5 CORRECT 8 "F" Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 12:07:51.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 1 HINT Why don't you continue working on applying Newton's second law to the electron from T0 to T1. 1 Self-explanation Control WRITE-NSL-COMPO S0704 S0704-Feb05-10-27-12 2007-02-05 12:07:53.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 2 HINT You can apply Newton's second law to the electron. Note that the electron is accelerating from T0 to T1. 2 Self-explanation Control WRITE-NSL-COMPO S0704 S0704-Feb05-10-27-12 2007-02-05 12:07:57.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 3 HINT Newton's second law F = m*a states that the net force on an object = the object's mass times its acceleration. Because the net force is the vector sum of all forces on the object, this can be applied component-wise to relate the sum of the force components in any direction to the mass times the component of acceleration in that direction. 3 Self-explanation Control WRITE-NSL-COMPO S0704 S0704-Feb05-10-27-12 2007-02-05 12:08:04.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 4 HINT Write Newton's second law in terms of component variables along the y axis as F_y = m * a_y 4 4 Self-explanation Control WRITE-NSL-COMPO 12 S0704 S0704-Feb05-10-27-12 2007-02-05 12:08:28.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 5 CORRECT 9 "F_y=m*a_y" Self-explanation Control WRITE-NSL-COMPO 21 (= Yc_Fe_ELECTRON_PLATES_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0)) S0704 S0704-Feb05-10-27-12 2007-02-05 12:08:31.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A Unknown 1 HINT Why don't you continue with the solution by working on applying the definition of electric field magnitude at the electron from T0 to T1. 1 Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 12:08:38.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A Unknown 2 HINT What is the relationship between the force, the charge and the electric field? 2 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0704 S0704-Feb05-10-27-12 2007-02-05 12:09:22.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A Unknown 3 HINT Why don't you continue working on applying the definition of electric field magnitude at the electron from T0 to T1. 1 Self-explanation Control S0704 S0704-Feb05-10-27-12 2007-02-05 12:09:24.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A Unknown 4 HINT What is the relationship between the force, the charge and the electric field? 2 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0704 S0704-Feb05-10-27-12 2007-02-05 12:09:24.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A Unknown 5 HINT The electric field vector at a location is defined as electric force vector per unit charge. That is, the electric force vector that a test charge would undergo if placed there, divided by the size of the charge. This definition can be applied to relate force and field magnitudes. 3 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0704 S0704-Feb05-10-27-12 2007-02-05 12:09:42.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A Unknown 6 HINT Write the equation F = (ABS q) * E 4 4 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 16 S0705 S0705-Feb05-15-58-43 2007-02-05 16:09:22.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 CORRECT Answer-1 ".113 N" Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 25 S0705 S0705-Feb05-15-58-43 2007-02-05 16:09:22.0 US/Eastern DELETION FOR* FOR4C Axes-1 Delete label=NIL Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:09:22.0 US/Eastern DELETION FOR* FOR4C Vector-2 Delete label=NIL Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:10:31.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 CORRECT Vector-3 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=138 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 30 S0705 S0705-Feb05-15-58-43 2007-02-05 16:11:00.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 1 CORRECT System-4 label="charged_particle";body=particle;time=NIL Joint Explanation Experimental DRAW-BODY 40 S0705 S0705-Feb05-15-58-43 2007-02-05 16:11:53.0 US/Eastern ATTEMPT Variable RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 INCORRECT Var-5 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9E-6" Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE 38 (= Q_PARTICLE (- 7.900000000000001e-6)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:12:10.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 HINT Var-5 label=q Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE S0705 S0705-Feb05-15-58-43 2007-02-05 16:12:19.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 3 CORRECT Var-5 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9E-6 C" Joint Explanation Experimental DEFINE-CHARGE 46 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:12:46.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 1 INCORRECT 0 "F=E*q" Undefined variable: F 1 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES S0705 S0705-Feb05-15-58-43 2007-02-05 16:13:53.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 2 CORRECT Vector-6 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=202;mag=77 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES S0705 S0705-Feb05-15-58-43 2007-02-05 16:14:18.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 0 "E=14.3E3 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 54 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:14:28.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 1 INCORRECT 1 "F=E*q" Joint Explanation Experimental COMPO-GENERAL-CASE 53 (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:14:28.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 2 INCORRECT 1 "F=E*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 53 (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:14:28.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 3 INCORRECT 1 "F=E*q" Joint Explanation Experimental WRITE-NET-FORCE-COMPO 53 (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:14:28.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 4 INCORRECT 1 "F=E*q" Joint Explanation Experimental COMPO-GENERAL-CASE 53 (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:14:38.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 5 INCORRECT 1 "F=E*q" Joint Explanation Experimental COMPO-GENERAL-CASE (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:14:38.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 6 INCORRECT 1 "F=E*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:14:38.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 7 INCORRECT 1 "F=E*q" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:14:38.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 8 INCORRECT 1 "F=E*q" Joint Explanation Experimental COMPO-GENERAL-CASE (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:14:50.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 9 INCORRECT 1 "F=q*E" Joint Explanation Experimental COMPO-GENERAL-CASE 52 (= Fnet_PARTICLE_1 (* Q_PARTICLE E_REGION_UNSPECIFIED)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:14:50.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 10 INCORRECT 1 "F=q*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 52 (= Fnet_PARTICLE_1 (* Q_PARTICLE E_REGION_UNSPECIFIED)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:14:50.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 11 INCORRECT 1 "F=q*E" Joint Explanation Experimental WRITE-NET-FORCE-COMPO 52 (= Fnet_PARTICLE_1 (* Q_PARTICLE E_REGION_UNSPECIFIED)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:14:50.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 12 INCORRECT 1 "F=q*E" Joint Explanation Experimental COMPO-GENERAL-CASE 52 (= Fnet_PARTICLE_1 (* Q_PARTICLE E_REGION_UNSPECIFIED)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:15:04.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 13 INCORRECT 1 "F=q*E N" Syntax error in F=q*E N 1 Joint Explanation Experimental COMPO-GENERAL-CASE ? S0705 S0705-Feb05-15-58-43 2007-02-05 16:15:37.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 14 2 "" Joint Explanation Experimental COMPO-GENERAL-CASE S0705 S0705-Feb05-15-58-43 2007-02-05 16:15:38.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 15 INCORRECT 1 "F=.113 N" Joint Explanation Experimental COMPO-GENERAL-CASE (= Fnet_PARTICLE_1 (DNUM 0.113 N)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:16:21.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 16 INCORRECT 1 "F=abs(q*E) N" Syntax error in F=abs(q*E) N 1 Joint Explanation Experimental COMPO-GENERAL-CASE ? S0705 S0705-Feb05-15-58-43 2007-02-05 16:16:27.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 17 CORRECT 1 "F=abs(q*E)" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-GENERAL-CASE 72 (= Fnet_PARTICLE_1 (ABS (* Q_PARTICLE E_REGION_UNSPECIFIED))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:16:27.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 1 CORRECT 1 "F=abs(q*E)" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 72 (= Fnet_PARTICLE_1 (ABS (* Q_PARTICLE E_REGION_UNSPECIFIED))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:16:27.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= (+ Yc_Fe_PARTICLE_UNSPECIFIED_1_0) Yc_Fnet_PARTICLE_1_0)) 1 CORRECT 1 "F=abs(q*E)" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-NET-FORCE-COMPO 72 (= Fnet_PARTICLE_1 (ABS (* Q_PARTICLE E_REGION_UNSPECIFIED))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:16:27.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_Fnet_PARTICLE_1_0 (* Fnet_PARTICLE_1 (SIN (- (DNUM 202 deg) (DNUM 0 deg)))))) 1 CORRECT 1 "F=abs(q*E)" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-GENERAL-CASE 72 (= Fnet_PARTICLE_1 (ABS (* Q_PARTICLE E_REGION_UNSPECIFIED))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:17:08.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 CORRECT Vector-6 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=77 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 16:17:12.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 CORRECT 1 "F=abs(q*E)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 87 (= Fe_PARTICLE_UNSPECIFIED_1 (ABS (* Q_PARTICLE E_REGION_UNSPECIFIED))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:17:23.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 INCORRECT Vector-6 label="F";type=Force;body=particle;agent=particle;forcetype=Electric;time=T0;dir=202;mag=77 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 16:17:35.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 CORRECT Vector-6 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=77 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 16:17:43.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 2 "F" Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:30:12.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="electron";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0705 S0705-Feb05-15-58-43 2007-02-05 16:30:19.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 2 INCORRECT System-668 label="Earth";body=earth;time=NIL Joint Explanation Experimental DRAW-BODY 12 S0705 S0705-Feb05-15-58-43 2007-02-05 16:30:55.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 CORRECT Vector-669 label="Fw";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=72 Joint Explanation Experimental DRAW-WEIGHT 13 S0705 S0705-Feb05-15-58-43 2007-02-05 16:31:21.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-670 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=90;mag=68 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 12 S0705 S0705-Feb05-15-58-43 2007-02-05 16:32:06.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 INCORRECT Var-671 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11E-31" Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-MASS (= m_ELECTRON 9.11e-31) S0705 S0705-Feb05-15-58-43 2007-02-05 16:32:16.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 2 CORRECT Var-671 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11E-31 kg" Joint Explanation Experimental DEFINE-MASS 20 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:32:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 CORRECT 0 "Fw=m*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:32:40.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 INCORRECT 1 "E" Unable to solve for E. One thing you probably need is an equation specifying the given value of the charge on the electron. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:32:51.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 3 CORRECT System-667 label="electron";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 21 S0705 S0705-Feb05-15-58-43 2007-02-05 16:33:05.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-672 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60E-19 C" Joint Explanation Experimental DEFINE-CHARGE 28 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:33:14.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 2 CORRECT 1 "Fw" Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:33:18.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 3 INCORRECT 2 "E" Unable to solve for E. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:33:44.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 INCORRECT 2 "E=Fw/q" Undefined variable: q 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0705 S0705-Feb05-15-58-43 2007-02-05 16:33:48.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 2 INCORRECT 2 "E=Fw/qe" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:33:48.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 1 INCORRECT 2 "E=Fw/qe" Joint Explanation Experimental WRITE-NFL-COMPO (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:33:48.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 1 INCORRECT 2 "E=Fw/qe" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:33:53.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 4 INCORRECT 3 "E" Unable to solve for E. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:33:58.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (DRAW-AXES 0) 1 HINT Vector-672 label=E It is now a good idea for you to draw an axis. This will help to ground your work and be useful later on in the process. 1 Joint Explanation Experimental DRAW-COMPO-FORM-AXES S0705 S0705-Feb05-15-58-43 2007-02-05 16:33:58.0 US/Eastern DELETION ELEC* ELEC1C Axes-673 Delete label=NIL Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:33:58.0 US/Eastern DELETION ELEC* ELEC1C Axes-674 Delete label=NIL Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:34:34.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 2 CORRECT Axes-675 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-COMPO-FORM-AXES 38 S0705 S0705-Feb05-15-58-43 2007-02-05 16:34:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 3 INCORRECT 2 "E=Fw/qe" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:34:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 4 INCORRECT 2 "E=Fw/qe" Joint Explanation Experimental WRITE-NFL-COMPO (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:34:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 5 INCORRECT 2 "E=Fw/qe" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:34:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 6 INCORRECT 2 "E=Fw/qe" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:35:05.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 7 CORRECT 2 "E_y=Fw/qe" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 58 (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:35:05.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 2 CORRECT 2 "E_y=Fw/qe" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NFL-COMPO 58 (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:35:05.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 2 CORRECT 2 "E_y=Fw/qe" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 58 (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:35:14.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 5 CORRECT 3 "E_y" Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:35:16.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Q_ELECTRON (DNUM -1.5999999999999998e-19 C))) 1 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:35:16.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= g_EARTH (DNUM 9.8 m/s^2))) 1 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-G-ON-EARTH (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:35:16.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= m_ELECTRON (DNUM 9.11e-31 kg))) 1 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:35:16.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 2 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WT-LAW (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:35:16.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 8 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:35:16.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 3 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NFL-COMPO (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:35:16.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 3 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:36:10.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Q_ELECTRON (DNUM -1.5999999999999998e-19 C))) 2 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:36:10.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= g_EARTH (DNUM 9.8 m/s^2))) 2 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-G-ON-EARTH (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:36:10.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= m_ELECTRON (DNUM 9.11e-31 kg))) 2 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:36:10.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 3 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WT-LAW (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:36:10.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 9 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:36:10.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 4 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NFL-COMPO (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:36:10.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 4 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:36:12.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (EQN (= g_EARTH (DNUM 9.8 m/s^2))) 3 HINT It is good practice to identify the fundamental principles you are using by writing them purely symbolically in standard form before combining them with other equations or given values. Select "Review Physics Equations" on the Help Menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental WRITE-G-ON-EARTH S0705 S0705-Feb05-15-58-43 2007-02-05 16:36:23.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (EQN (= g_EARTH (DNUM 9.8 m/s^2))) 4 HINT A good solution would include Newton's second law and the definition of electric field, written as separate equations. 3 3 Joint Explanation Experimental WRITE-G-ON-EARTH S0705 S0705-Feb05-15-58-43 2007-02-05 16:36:23.0 US/Eastern DELETION ELEC* ELEC1C 3 Delete Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:36:52.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= g_EARTH (DNUM 9.8 m/s^2))) 5 INCORRECT 1 "F=m*a" Undefined variables: (F a) 1 Joint Explanation Experimental WRITE-G-ON-EARTH S0705 S0705-Feb05-15-58-43 2007-02-05 16:36:52.0 US/Eastern DELETION ELEC* ELEC1C 1 Delete Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:37:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= g_EARTH (DNUM 9.8 m/s^2))) 6 CORRECT 2 "Fw = 8.927800000000001e-30 N" Joint Explanation Experimental WRITE-G-ON-EARTH 38 (= Fw_ELECTRON_EARTH_1 (DNUM 8.927800000000001e-30 N)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:37:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= m_ELECTRON (DNUM 9.11e-31 kg))) 3 CORRECT 2 "Fw = 8.927800000000001e-30 N" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 38 (= Fw_ELECTRON_EARTH_1 (DNUM 8.927800000000001e-30 N)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:37:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 4 CORRECT 2 "Fw = 8.927800000000001e-30 N" Joint Explanation Experimental WT-LAW 38 (= Fw_ELECTRON_EARTH_1 (DNUM 8.927800000000001e-30 N)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:37:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 10 CORRECT 3 "E_y=Fw/qe" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 58 (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:37:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 5 CORRECT 3 "E_y=Fw/qe" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NFL-COMPO 58 (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:37:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 5 CORRECT 3 "E_y=Fw/qe" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 58 (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:38:03.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 INCORRECT 1 "F=E*qe" Undefined variable: F 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 16:38:03.0 US/Eastern DELETION ELEC* ELEC1C 1 Delete Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:38:30.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 16:38:57.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 HINT #.(wb-quant '(define-variable "E" |NIL| |E-field| |region| |NIL| |Unspecified| NIL "") 'mag) Yes. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 16:39:46.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 HINT (charge-force-efield ((?axis . y))) That principle is part of a valid solution to this problem but you cannot use it as the first principle. What is the first principle application that you wish to work on? You should look for a principle that contains the sought quantity itself. 3 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 16:39:55.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 6 HINT charge-force-efield-mag Yep. You should be introducing a variable for the magnitude of the electric field at the region due to an unspecified agent. 4 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 16:40:13.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 7 HINT Vector-670 label=E Do you really want the direction of that vector to be 90 degrees? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 16:40:18.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 8 HINT You can determine the direction of the electric field at the region due to an unspecified agent from the problem statement 2 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 16:40:52.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 9 CORRECT Vector-670 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=68 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 16:41:03.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= g_EARTH (DNUM 9.8 m/s^2))) 7 CORRECT 1 "Fw = 8.927800000000001e-30 N" Joint Explanation Experimental WRITE-G-ON-EARTH (= Fw_ELECTRON_EARTH_1 (DNUM 8.927800000000001e-30 N)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:41:03.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= m_ELECTRON (DNUM 9.11e-31 kg))) 4 CORRECT 1 "Fw = 8.927800000000001e-30 N" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Fw_ELECTRON_EARTH_1 (DNUM 8.927800000000001e-30 N)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:41:03.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 5 CORRECT 1 "Fw = 8.927800000000001e-30 N" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_1 (DNUM 8.927800000000001e-30 N)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:41:04.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 11 CORRECT 2 "E_y=Fw/qe" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:41:04.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 6 CORRECT 2 "E_y=Fw/qe" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NFL-COMPO (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:41:04.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 6 CORRECT 2 "E_y=Fw/qe" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:41:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 12 HINT It is good practice to identify the fundamental principles you are using by writing them purely symbolically in standard form before combining them with other equations or given values. Select "Review Physics Equations" on the Help Menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0705 S0705-Feb05-15-58-43 2007-02-05 16:41:16.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 13 HINT Why don't you continue with the solution by working on applying the definition of electric field magnitude at the electron at T0. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0705 S0705-Feb05-15-58-43 2007-02-05 16:41:36.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 14 INCORRECT 3 "E=F/abs(q)" Undefined variables: (F q) 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0705 S0705-Feb05-15-58-43 2007-02-05 16:41:36.0 US/Eastern DELETION ELEC* ELEC1C Var-676 Delete label=NIL Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:42:11.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 15 CORRECT 3 "E=Fw/abs(qe)" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:42:11.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 7 CORRECT 3 "E=Fw/abs(qe)" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NFL-COMPO (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:42:11.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 7 CORRECT 3 "E=Fw/abs(qe)" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:42:11.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 1 CORRECT 3 "E=Fw/abs(qe)" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:42:14.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 16 HINT It is good practice to identify the fundamental principles you are using by writing them purely symbolically in standard form before combining them with other equations or given values. Select "Review Physics Equations" on the Help Menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0705 S0705-Feb05-15-58-43 2007-02-05 16:42:17.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 17 HINT A good solution would include Newton's second law and the definition of electric field, written as separate equations. 3 3 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:20.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 18 INCORRECT 4 "F=E*qe" Undefined variable: F 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 19 INCORRECT 4 "Fw=E*qe" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 8 INCORRECT 4 "Fw=E*qe" Joint Explanation Experimental WRITE-NFL-COMPO (= Fw_ELECTRON_EARTH_1 (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 8 INCORRECT 4 "Fw=E*qe" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Fw_ELECTRON_EARTH_1 (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 2 INCORRECT 4 "Fw=E*qe" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:28.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 20 INCORRECT 4 "Fw=E*qe" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:28.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 9 INCORRECT 4 "Fw=E*qe" Joint Explanation Experimental WRITE-NFL-COMPO (= Fw_ELECTRON_EARTH_1 (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:28.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 9 INCORRECT 4 "Fw=E*qe" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Fw_ELECTRON_EARTH_1 (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:28.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 3 INCORRECT 4 "Fw=E*qe" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 21 INCORRECT 4 "Fw=E*qe" Joint Explanation Experimental COMPO-PARALLEL-AXIS 57 (= Fw_ELECTRON_EARTH_1 (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 10 INCORRECT 4 "Fw=E*qe" Joint Explanation Experimental WRITE-NFL-COMPO 57 (= Fw_ELECTRON_EARTH_1 (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 10 INCORRECT 4 "Fw=E*qe" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 57 (= Fw_ELECTRON_EARTH_1 (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 4 INCORRECT 4 "Fw=E*qe" Joint Explanation Experimental COMPO-PARALLEL-AXIS 57 (= Fw_ELECTRON_EARTH_1 (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:41.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 22 HINT System-668 label=Earth The closest matching CORRECT entry seems to be done already, so you really don't need to generate it again. If you want to anyway, click on Explain more. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:41.0 US/Eastern DELETION ELEC* ELEC1C 3 Delete Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:41.0 US/Eastern DELETION ELEC* ELEC1C System-668 Delete label=Earth Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:41.0 US/Eastern DELETION ELEC* ELEC1C 4 Delete Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:55.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 23 CORRECT 2 "E_y=Fw/qe" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:55.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 11 CORRECT 2 "E_y=Fw/qe" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NFL-COMPO (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:43:55.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 11 CORRECT 2 "E_y=Fw/qe" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:44:49.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 6 CORRECT 3 "E_y" Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:45:19.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 10 INCORRECT Vector-670 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=90;mag=68 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 16:45:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 24 INCORRECT 2 "E_y=-Fw/qe" Joint Explanation Experimental COMPO-PARALLEL-AXIS 37 (= Yc_E_REGION_UNSPECIFIED_0 (/ (- Fw_ELECTRON_EARTH_1) Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:45:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 12 INCORRECT 2 "E_y=-Fw/qe" Joint Explanation Experimental WRITE-NFL-COMPO 37 (= Yc_E_REGION_UNSPECIFIED_0 (/ (- Fw_ELECTRON_EARTH_1) Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:45:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 12 INCORRECT 2 "E_y=-Fw/qe" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 37 (= Yc_E_REGION_UNSPECIFIED_0 (/ (- Fw_ELECTRON_EARTH_1) Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:46:02.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 11 CORRECT Vector-670 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=93 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 16:46:22.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-677 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=77 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 16:46:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 25 CORRECT 2 "E_y=Fw/qe" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 57 (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:46:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 13 CORRECT 2 "E_y=Fw/qe" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NFL-COMPO 57 (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:46:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 13 CORRECT 2 "E_y=Fw/qe" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 57 (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:47:05.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C No Intepretation 1 INCORRECT 4 "Fe=qE*E_y" Undefined variable: qE 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 16:47:12.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C No Intepretation 2 TRUE_BUT_IRRELEVANT 4 "Fe=qe*E_y" Joint Explanation Experimental (= Fe_ELECTRON_UNSPECIFIED_1 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:47:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C No Intepretation 3 TRUE_BUT_IRRELEVANT 4 "Fe=qe*E_y" Joint Explanation Experimental 58 (= Fe_ELECTRON_UNSPECIFIED_1 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0)) S0705 S0705-Feb05-15-58-43 2007-02-05 16:47:39.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Q_ELECTRON (DNUM -1.5999999999999998e-19 C))) 3 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:47:39.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= g_EARTH (DNUM 9.8 m/s^2))) 8 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-G-ON-EARTH (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:47:39.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= m_ELECTRON (DNUM 9.11e-31 kg))) 5 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:47:39.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 6 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WT-LAW (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:47:39.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 26 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:47:39.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 14 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NFL-COMPO (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:47:39.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 14 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:47:56.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C (EQN (= Q_ELECTRON (DNUM -1.5999999999999998e-19 C))) 4 CORRECT Answer-1 "5.58E-11 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 83 S0705 S0705-Feb05-15-58-43 2007-02-05 16:48:00.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Q_ELECTRON (DNUM -1.5999999999999998e-19 C))) 5 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:48:00.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= g_EARTH (DNUM 9.8 m/s^2))) 9 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-G-ON-EARTH (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:48:00.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= m_ELECTRON (DNUM 9.11e-31 kg))) 6 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:48:00.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 7 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WT-LAW (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:48:00.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 27 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:48:00.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 15 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NFL-COMPO (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:48:00.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 15 CORRECT 3 "E_y = -5.579875000000001e-11 N/C" Although equation 4 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_E_REGION_UNSPECIFIED_0 (* (- 5.579875000000001e-11) (DNUM 1 N/C))) S0705 S0705-Feb05-15-58-43 2007-02-05 16:48:02.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 HINT It is good practice to identify the fundamental principles you are using by writing them purely symbolically in standard form before combining them with other equations or given values. Select "Review Physics Equations" on the Help Menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental COMPO-ZERO-VECTOR S0705 S0705-Feb05-15-58-43 2007-02-05 16:48:03.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 2 HINT A good solution would include Newton's second law and the definition of electric field, written as separate equations. 3 3 Joint Explanation Experimental COMPO-ZERO-VECTOR S0705 S0705-Feb05-15-58-43 2007-02-05 16:49:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 3 CORRECT 5 "Fw-Fe=0" Joint Explanation Experimental COMPO-ZERO-VECTOR (= (- Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) 0) S0705 S0705-Feb05-15-58-43 2007-02-05 16:49:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 28 CORRECT 5 "Fw-Fe=0" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (- Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) 0) S0705 S0705-Feb05-15-58-43 2007-02-05 16:49:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 5 "Fw-Fe=0" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= (- Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) 0) S0705 S0705-Feb05-15-58-43 2007-02-05 16:49:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 5 "Fw-Fe=0" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (- Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) 0) S0705 S0705-Feb05-15-58-43 2007-02-05 17:01:33.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-1 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60E-19 C" Joint Explanation Experimental DEFINE-CHARGE 9 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:01:52.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-2 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11E-31 kg" Joint Explanation Experimental DEFINE-MASS 12 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:01:52.0 US/Eastern DELETION ELEC* ELEC3A Var-3 Delete label=NIL Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:02:49.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-4 label="se";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value=".015 m" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 11 S0705 S0705-Feb05-15-58-43 2007-02-05 17:02:58.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Var-4 label="se";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T1;value=".015 m" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 10 S0705 S0705-Feb05-15-58-43 2007-02-05 17:03:05.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT Var-4 label="se";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0;value=".015 m" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:03:15.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 INCORRECT Var-4 label="se";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.5 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 9 S0705 S0705-Feb05-15-58-43 2007-02-05 17:03:15.0 US/Eastern DELETION ELEC* ELEC3A Vector-5 Delete label=NIL Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:04:00.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-6 label="Fp";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=59 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 10 S0705 S0705-Feb05-15-58-43 2007-02-05 17:04:12.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 1 CORRECT Axes-7 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 20 S0705 S0705-Feb05-15-58-43 2007-02-05 17:04:17.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 2 CORRECT Axes-7 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES S0705 S0705-Feb05-15-58-43 2007-02-05 17:04:27.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 3 CORRECT Axes-7 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 21 S0705 S0705-Feb05-15-58-43 2007-02-05 17:04:43.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 INCORRECT Var-4 label="se";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.5 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 20 S0705 S0705-Feb05-15-58-43 2007-02-05 17:04:44.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 HINT Var-4 label=se Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 17:05:46.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 2 CORRECT Vector-8 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=61 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 17:06:03.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 0 "E=2.0E4 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 24 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:06:15.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 INCORRECT 1 "Fp=E*qe" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_ELECTRON_PLATES_12 (* E_REGION_PLATES Q_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:06:34.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-6 label="Fp";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=59 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 17:06:42.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 CORRECT Vector-6 label="Fp";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=59 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 17:06:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 2 CORRECT 1 "Fp=E*abs(qe)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 36 (= Fe_ELECTRON_PLATES_12 (* E_REGION_PLATES (ABS Q_ELECTRON))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:07:02.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 INCORRECT 2 "Fp_y" Unable to solve for Fp_y. One thing you probably need is an equation specifying the given value of the magnitude of the displacement of the electron from T0 to T1. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:07:14.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 INCORRECT Var-4 label="se";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.5 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:07:37.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 INCORRECT Var-4 label="se";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T1;value="1.5 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:07:40.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A CALC_REQUEST 2 HINT Var-4 label=se Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:09:40.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A CALC_REQUEST 3 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:11:03.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 4 INCORRECT 2 "Fp_y" Unable to solve for Fp_y. One thing you probably need is an equation specifying the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:11:36.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 INCORRECT Var-4 label="se";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T1;value="1.5 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:12:12.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 INCORRECT Var-9 label="distance";quant=length;subtype=NIL;body=plates;agent=NIL;time=NIL;value="1.5 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:12:12.0 US/Eastern DELETION ELEC* ELEC3A Var-9 Delete label=distance Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:12:24.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 10 INCORRECT Var-4 label="se";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T1;value="1.5" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 35 S0705 S0705-Feb05-15-58-43 2007-02-05 17:12:28.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 11 INCORRECT Var-4 label="se";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T1;value="1.5 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:12:30.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 HINT Var-4 label=se Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:13:12.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 INCORRECT Var-10 label="vf";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T1;value="" Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:13:19.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 3 INCORRECT Var-10 label="vf";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T1;value="" Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:13:20.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 12 HINT Var-10 label=vf On this problem, you should use velocity instead of speed. 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:13:20.0 US/Eastern DELETION ELEC* ELEC3A Var-10 Delete label=vf Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:14:03.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 13 INCORRECT Vector-11 label="d";type=Displacement;body=electron;agent=NIL;time=T1;dir=90;mag=57 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:14:07.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 14 HINT Vector-11 label=d You don't need to draw the displacement at T1. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:14:21.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 15 CORRECT Vector-11 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=57 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:14:21.0 US/Eastern DELETION ELEC* ELEC3A Var-4 Delete label=se Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:14:33.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 5 INCORRECT 2 "Fp_y" Unable to solve for Fp_y. One thing you probably need is an equation specifying the given value of d. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:14:43.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 2 "d=.015 m" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 39 (= s_ELECTRON_12 (DNUM 0.015 m)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:14:46.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 6 INCORRECT 3 "Fp_y" Unable to solve for Fp_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:15:38.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-12 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=55 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0705 S0705-Feb05-15-58-43 2007-02-05 17:15:43.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 7 INCORRECT 3 "Fp_y" Unable to solve for Fp_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:15:46.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0705 S0705-Feb05-15-58-43 2007-02-05 17:16:22.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 CORRECT Vector-12 label="a1";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=55 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0705 S0705-Feb05-15-58-43 2007-02-05 17:16:27.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 8 INCORRECT 3 "Fp_y" Unable to solve for Fp_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:16:30.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Joint Explanation Experimental DRAW-BODY S0705 S0705-Feb05-15-58-43 2007-02-05 17:16:32.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (BODY ELECTRON TIME NIL) 2 HINT You should use the body tool to draw a body choosing the electron as the body. 2 2 Joint Explanation Experimental DRAW-BODY 34 S0705 S0705-Feb05-15-58-43 2007-02-05 17:16:45.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 3 CORRECT System-13 label="electron";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 44 S0705 S0705-Feb05-15-58-43 2007-02-05 17:16:49.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 9 INCORRECT 3 "Fp_y" Unable to solve for Fp_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:16:52.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A CALC_REQUEST 10 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:17:15.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC3A CALC_REQUEST 11 HINT #.(wb-quant '(define-variable "v" |instantaneous| |velocity| |electron| |T1| |NIL| NIL "") 'mag) Very good. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:17:30.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC3A CALC_REQUEST 12 HINT (lk-no-t ((?axis . y))) Right. Your goal should be choosing a particular kinematic equation containing the y component of the velocity of the electron at T1. 3 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:17:47.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 13 INCORRECT 3 "Fp_y" Unable to solve for Fp_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:17:50.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 HINT Vector-10 label=v0 Why don't you continue with the solution by working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0705 S0705-Feb05-15-58-43 2007-02-05 17:18:34.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 2 INCORRECT Var-14 label="vi";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T0;value="0" Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0705 S0705-Feb05-15-58-43 2007-02-05 17:18:39.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 3 INCORRECT Var-14 label="vi";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T0;value="0 m/s" Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0705 S0705-Feb05-15-58-43 2007-02-05 17:18:43.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 4 INCORRECT Var-14 label="vi";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T0;value="0 m/s" Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0705 S0705-Feb05-15-58-43 2007-02-05 17:18:43.0 US/Eastern DELETION ELEC* ELEC3A Vector-15 Delete label=NIL Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:19:00.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 5 CORRECT Vector-16 label="v";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0705 S0705-Feb05-15-58-43 2007-02-05 17:19:13.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 4 CORRECT Vector-17 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=67 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:19:13.0 US/Eastern DELETION ELEC* ELEC3A Var-14 Delete label=vi Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:19:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 1 CORRECT 3 "v=0 m/s" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:19:35.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 14 INCORRECT 4 "Fp_y" Unable to solve for Fp_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:19:56.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A No Intepretation 1 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:20:00.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A No Intepretation 2 HINT Your goal should be writing a constant acceleration equation in terms of vector components along the Y axis. 2 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:20:03.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A No Intepretation 3 HINT Do you know an equation relating the components of initial velocity, final velocity, acceleration, and displacement when acceleration is constant? 3 Joint Explanation Experimental WRITE-LK-NO-T-COMPO S0705 S0705-Feb05-15-58-43 2007-02-05 17:20:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A No Intepretation 4 HINT Write the equation vf_y ^ 2 = 0 + (2 * a1_y * d_y) 4 4 Joint Explanation Experimental WRITE-LK-NO-T-COMPO 39 S0705 S0705-Feb05-15-58-43 2007-02-05 17:20:42.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 INCORRECT 4 "vf^2=v^2+2(a1*d)" Syntax error in vf^2=v^2+2(a1*d) 1 Joint Explanation Experimental ? S0705 S0705-Feb05-15-58-43 2007-02-05 17:20:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 5 TRUE_BUT_IRRELEVANT 4 "(vf^2)=(v^2)+2*(a1*d)" Joint Explanation Experimental (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* 2 (* a_ELECTRON_12 s_ELECTRON_12)))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:21:04.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 15 INCORRECT 5 "Fp_y" Unable to solve for Fp_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:21:08.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 2 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO S0705 S0705-Feb05-15-58-43 2007-02-05 17:21:12.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 3 HINT Try writing a constant acceleration equation in terms of vector components along the Y axis. 2 Joint Explanation Experimental WRITE-LK-NO-T-COMPO S0705 S0705-Feb05-15-58-43 2007-02-05 17:21:12.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 4 HINT Do you know an equation relating the components of initial velocity, final velocity, acceleration, and displacement when acceleration is constant? 3 Joint Explanation Experimental WRITE-LK-NO-T-COMPO S0705 S0705-Feb05-15-58-43 2007-02-05 17:21:12.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 5 HINT Write the equation vf_y ^ 2 = 0 + (2 * a1_y * d_y) 4 4 Joint Explanation Experimental WRITE-LK-NO-T-COMPO 34 S0705 S0705-Feb05-15-58-43 2007-02-05 17:21:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 6 CORRECT 4 "(vf_y^2)=(v_y^2)+2*(a1_y*d_y)" Joint Explanation Experimental WRITE-LK-NO-T-COMPO 46 (= (^ Yc_v_ELECTRON_2_0 2) (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 (* Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:21:54.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 16 INCORRECT 5 "Fp_y" Unable to solve for Fp_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:21:57.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A No Intepretation 6 HINT Why don't you continue with the solution by working on applying Newton's second law to the electron from T0 to T1. 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:22:06.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A No Intepretation 7 HINT You can apply Newton's second law to the electron. Note that the electron is accelerating from T0 to T1. 2 Joint Explanation Experimental WRITE-NSL-COMPO S0705 S0705-Feb05-15-58-43 2007-02-05 17:22:08.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A No Intepretation 8 HINT Newton's second law F = m*a states that the net force on an object = the object's mass times its acceleration. Because the net force is the vector sum of all forces on the object, this can be applied component-wise to relate the sum of the force components in any direction to the mass times the component of acceleration in that direction. 3 Joint Explanation Experimental WRITE-NSL-COMPO S0705 S0705-Feb05-15-58-43 2007-02-05 17:22:23.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 9 TRUE_BUT_IRRELEVANT 5 "Fp=me*a1" Joint Explanation Experimental (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:22:39.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 10 INCORRECT 6 "a1=F/me" Undefined variable: F 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:22:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 11 TRUE_BUT_IRRELEVANT 6 "a1=Fp/me" Joint Explanation Experimental (= a_ELECTRON_12 (/ Fe_ELECTRON_PLATES_12 m_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:23:00.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 17 INCORRECT 7 "Fp_y" Unable to solve for Fp_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:23:45.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 1 HINT Why don't you continue working on applying Newton's second law to the electron from T0 to T1. 1 Joint Explanation Experimental WRITE-NSL-COMPO S0705 S0705-Feb05-15-58-43 2007-02-05 17:23:47.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 2 HINT You can apply Newton's second law to the electron. Note that the electron is accelerating from T0 to T1. 2 Joint Explanation Experimental WRITE-NSL-COMPO S0705 S0705-Feb05-15-58-43 2007-02-05 17:24:03.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 3 HINT Newton's second law F = m*a states that the net force on an object = the object's mass times its acceleration. Because the net force is the vector sum of all forces on the object, this can be applied component-wise to relate the sum of the force components in any direction to the mass times the component of acceleration in that direction. 3 Joint Explanation Experimental WRITE-NSL-COMPO S0705 S0705-Feb05-15-58-43 2007-02-05 17:24:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 4 HINT Write Newton's second law in terms of component variables along the y axis as Fp_y = me * a1_y 4 4 Joint Explanation Experimental WRITE-NSL-COMPO 41 S0705 S0705-Feb05-15-58-43 2007-02-05 17:24:36.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 5 INCORRECT 5 "Fp_y=me_y*a1_y" Undefined variable: me_y 1 Joint Explanation Experimental WRITE-NSL-COMPO S0705 S0705-Feb05-15-58-43 2007-02-05 17:24:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 6 CORRECT 5 "Fp_y=me*a1_y" Joint Explanation Experimental WRITE-NSL-COMPO 53 (= Yc_Fe_ELECTRON_PLATES_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:24:50.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 18 INCORRECT 7 "Fp_y" Unable to solve for Fp_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:25:14.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 3 CORRECT 1 "Fp_y=E*abs(qe)" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 48 (= Yc_Fe_ELECTRON_PLATES_12_0 (* E_REGION_PLATES (ABS Q_ELECTRON))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:25:14.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 1 CORRECT 1 "Fp_y=E*abs(qe)" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 48 (= Yc_Fe_ELECTRON_PLATES_12_0 (* E_REGION_PLATES (ABS Q_ELECTRON))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:25:18.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_1_0 0)) 1 CORRECT 3 "v_y=0 m/s" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Yc_v_ELECTRON_1_0 (DNUM 0 m/s)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:25:20.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 7 CORRECT 6 "a1_y=Fp_y/me" Joint Explanation Experimental WRITE-NSL-COMPO (= Yc_a_ELECTRON_12_0 (/ Yc_Fe_ELECTRON_PLATES_12_0 m_ELECTRON)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:25:34.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 19 CORRECT 7 "Fp_y" Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:25:46.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 20 CORRECT 8 "a1_y" Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:25:56.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 21 INCORRECT 9 "vf_y" Unable to solve for vf_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:26:49.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 22 INCORRECT 9 "vf_y" Unable to solve for vf_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:26:52.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the velocity of the electron at T1 onto the y axis. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0705 S0705-Feb05-15-58-43 2007-02-05 17:26:59.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 2 HINT Since the velocity of the electron at T1 at T1 lies along the y axis, it has a non-zero component along that axis. 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0705 S0705-Feb05-15-58-43 2007-02-05 17:27:02.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0705 S0705-Feb05-15-58-43 2007-02-05 17:27:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 4 CORRECT 9 "vf=vf_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= v_ELECTRON_2 Yc_v_ELECTRON_2_0) S0705 S0705-Feb05-15-58-43 2007-02-05 17:28:02.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 23 INCORRECT 10 "vf_y" Unable to solve for vf_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:28:04.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the displacement of the electron from T0 to T1 onto the y axis. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0705 S0705-Feb05-15-58-43 2007-02-05 17:28:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 2 HINT Since the displacement of the electron from T0 to T1 from T0 to T1 lies along the y axis, it has a non-zero component along that axis. 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0705 S0705-Feb05-15-58-43 2007-02-05 17:28:06.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0705 S0705-Feb05-15-58-43 2007-02-05 17:28:06.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 4 HINT Since the displacement of the electron from T0 to T1 from T0 to T1 lies along the y axis and points in the + y direction, write the equation d_y = d. 4 4 Joint Explanation Experimental COMPO-PARALLEL-AXIS 43 S0705 S0705-Feb05-15-58-43 2007-02-05 17:28:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 5 CORRECT 10 "d_y=d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_s_ELECTRON_12_0 s_ELECTRON_12) S0705 S0705-Feb05-15-58-43 2007-02-05 17:28:34.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 12 INCORRECT 11 "a1_y=a" Undefined variable: a 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:28:38.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 13 INCORRECT 11 "a1_y=a" Undefined variable: a 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:28:40.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 14 TRUE_BUT_IRRELEVANT 11 "a1_y=a1" Joint Explanation Experimental (= Yc_a_ELECTRON_12_0 a_ELECTRON_12) S0705 S0705-Feb05-15-58-43 2007-02-05 17:28:52.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 2 CORRECT 12 "Fp_y=Fp" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_Fe_ELECTRON_PLATES_12_0 Fe_ELECTRON_PLATES_12) S0705 S0705-Feb05-15-58-43 2007-02-05 17:29:03.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 24 CORRECT 13 "vf_y" Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:29:20.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.03E7 m/s" Joint Explanation Experimental 68 S0705 S0705-Feb05-15-58-43 2007-02-05 17:44:48.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-667 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 15 S0705 S0705-Feb05-15-58-43 2007-02-05 17:45:02.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-668 label="electron";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 25 S0705 S0705-Feb05-15-58-43 2007-02-05 17:45:20.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-669 label="Fw";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=105 Joint Explanation Experimental DRAW-WEIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:45:34.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-670 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=270;mag=104 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 24 S0705 S0705-Feb05-15-58-43 2007-02-05 17:45:37.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Vector-670 label=Fe Do you really want the direction of that vector to be 270 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 17:45:50.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 CORRECT Vector-670 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=104 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 17:45:50.0 US/Eastern DELETION ELEC* ELEC6A Vector-670 Delete label=Fe Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:46:53.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=100 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 17:47:11.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-672 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=61 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:47:52.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 4 CORRECT Vector-673 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=51 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0705 S0705-Feb05-15-58-43 2007-02-05 17:48:12.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-674 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0705 S0705-Feb05-15-58-43 2007-02-05 17:48:27.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-675 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=69 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN S0705 S0705-Feb05-15-58-43 2007-02-05 17:49:07.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT Var-676 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60E-19" Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE (= Q_ELECTRON (- 1.5999999999999998e-19)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:49:16.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-676 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60E-19 C" Joint Explanation Experimental DEFINE-CHARGE 28 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:49:31.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-677 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11E-31 kg" Joint Explanation Experimental DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:49:54.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 0 "E=4.00E-12 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 36 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:50:03.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 INCORRECT 1 "E_y=E" Joint Explanation Experimental COMPO-PARALLEL-AXIS 35 (= Yc_E_REGION_UNSPECIFIED_0 E_REGION_UNSPECIFIED) S0705 S0705-Feb05-15-58-43 2007-02-05 17:50:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 2 CORRECT 1 "vi=4.30 m/s" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 39 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:51:17.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-678 label="Ftotal";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=270;mag=37 Joint Explanation Experimental DRAW-NET-FORCE-FROM-ACCEL S0705 S0705-Feb05-15-58-43 2007-02-05 17:51:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 1 INCORRECT 2 "Ftotal=Ftotal_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 Yc_Fnet_ELECTRON_12_0) S0705 S0705-Feb05-15-58-43 2007-02-05 17:51:38.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 2 INCORRECT 2 "Ftotal=F_y" Undefined variable: F_y 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0705 S0705-Feb05-15-58-43 2007-02-05 17:51:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 3 INCORRECT 2 "Ftotal=Fe-Fw" Joint Explanation Experimental COMPO-PARALLEL-AXIS 38 (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:51:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 1 INCORRECT 2 "Ftotal=Fe-Fw" Joint Explanation Experimental COMPO-PARALLEL-AXIS 38 (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:51:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 1 INCORRECT 2 "Ftotal=Fe-Fw" Joint Explanation Experimental WRITE-NET-FORCE-COMPO 38 (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:52:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 4 INCORRECT 2 "Ftotal=Fe-Fw" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:52:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 2 INCORRECT 2 "Ftotal=Fe-Fw" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:52:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 2 INCORRECT 2 "Ftotal=Fe-Fw" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:52:29.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 3 INCORRECT 2 "Ftotal_y=Fe_y-Fw_y" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Yc_Fnet_ELECTRON_12_0 (- Yc_Fe_ELECTRON_UNSPECIFIED_12_0 Yc_Fw_ELECTRON_EARTH_12_0)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:53:16.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT 2 "vf=vi+a*t" Undefined variable: t 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:53:16.0 US/Eastern DELETION ELEC* ELEC6A 2 Delete Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:54:06.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT 2 "vf=vi+2*a*d" Undefined variable: d 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:54:30.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT Vector-679 label="d";type=Displacement;body=electron;agent=NIL;time=T1;dir=90;mag=60 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:54:33.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Vector-679 label=d You don't need to draw the displacement at T1. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:54:45.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 CORRECT Vector-679 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=60 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0705 S0705-Feb05-15-58-43 2007-02-05 17:54:47.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 INCORRECT 2 "vf^2=vi^2+2*a*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:54:47.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 2 INCORRECT 2 "vf^2=vi^2+2*a*d" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:54:47.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 3 INCORRECT 2 "vf^2=vi^2+2*a*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:54:56.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 4 INCORRECT 2 "vf^2=vi^2+2*a*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:54:56.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 5 INCORRECT 2 "vf^2=vi^2+2*a*d" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:54:56.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 6 INCORRECT 2 "vf^2=vi^2+2*a*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:54:58.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 7 HINT 2 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO S0705 S0705-Feb05-15-58-43 2007-02-05 17:55:19.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 8 HINT 2 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO S0705 S0705-Feb05-15-58-43 2007-02-05 17:55:20.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 9 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Joint Explanation Experimental WRITE-LK-NO-T-COMPO 33 S0705 S0705-Feb05-15-58-43 2007-02-05 17:55:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 10 CORRECT 2 "vf_y^2=vi_y^2+2*a_y*d" Although equation 3 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO 39 (= (^ Yc_v_ELECTRON_2_0 2) (+ (^ Yc_v_ELECTRON_1_0 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:55:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 CORRECT 2 "vf_y^2=vi_y^2+2*a_y*d" Although equation 3 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 39 (= (^ Yc_v_ELECTRON_2_0 2) (+ (^ Yc_v_ELECTRON_1_0 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:55:42.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 11 CORRECT 2 "vf_y^2=vi_y^2+2*a_y*d_y" Joint Explanation Experimental WRITE-LK-NO-T-COMPO 44 (= (^ Yc_v_ELECTRON_2_0 2) (+ (^ Yc_v_ELECTRON_1_0 2) (* (* 2 Yc_a_ELECTRON_12_0) Yc_s_ELECTRON_12_0))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:55:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 12 CORRECT 2 "vf_y^2=vi_y^2+2*a_y*d_y" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ Yc_v_ELECTRON_2_0 2) (+ (^ Yc_v_ELECTRON_1_0 2) (* (* 2 Yc_a_ELECTRON_12_0) Yc_s_ELECTRON_12_0))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:55:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 13 CORRECT 2 "vf_y^2=vi_y^2+2*a_y*d_y" Joint Explanation Experimental WRITE-LK-NO-T-COMPO 45 (= (^ Yc_v_ELECTRON_2_0 2) (+ (^ Yc_v_ELECTRON_1_0 2) (* (* 2 Yc_a_ELECTRON_12_0) Yc_s_ELECTRON_12_0))) S0705 S0705-Feb05-15-58-43 2007-02-05 17:56:03.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 4 INCORRECT 3 "Ftotal=Fe-Fw" Joint Explanation Experimental COMPO-PARALLEL-AXIS 44 (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:56:03.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 5 INCORRECT 3 "Ftotal=Fe-Fw" Joint Explanation Experimental COMPO-PARALLEL-AXIS 44 (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:56:03.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 6 INCORRECT 3 "Ftotal=Fe-Fw" Joint Explanation Experimental WRITE-NET-FORCE-COMPO 44 (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:56:17.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 7 INCORRECT 3 "Ftotal_y=Fe_y-Fw_y" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Yc_Fnet_ELECTRON_12_0 (- Yc_Fe_ELECTRON_UNSPECIFIED_12_0 Yc_Fw_ELECTRON_EARTH_12_0)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:56:21.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 8 HINT 3 Think about the direction of the weight force on the electron from T0 to T1 due to the earth. 1 Joint Explanation Experimental WRITE-NET-FORCE-COMPO S0705 S0705-Feb05-15-58-43 2007-02-05 17:56:36.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 9 INCORRECT 3 "Ftotal_y=Fe_yFw_y" Undefined variable: Fe_yFw_y 1 Joint Explanation Experimental WRITE-NET-FORCE-COMPO S0705 S0705-Feb05-15-58-43 2007-02-05 17:56:42.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 10 CORRECT 3 "Ftotal_y=Fe_y+Fw_y" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Yc_Fnet_ELECTRON_12_0 (+ Yc_Fe_ELECTRON_UNSPECIFIED_12_0 Yc_Fw_ELECTRON_EARTH_12_0)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:57:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0))) 1 CORRECT 4 "Ftotal_y=me*a_y" Joint Explanation Experimental WRITE-NSL-NET-COMPO 56 (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:57:53.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 1 INCORRECT 5 "Fe_y=qe*E-y" The variable y is not used in any solution I know of. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO S0705 S0705-Feb05-15-58-43 2007-02-05 17:58:05.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 2 CORRECT 5 "Fe_y=qe*E_y" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 68 (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:58:15.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 INCORRECT 6 "Fw_y=me*g" Joint Explanation Experimental WT-LAW (= Yc_Fw_ELECTRON_EARTH_12_0 (* m_ELECTRON g_EARTH)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:58:15.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 2 INCORRECT 6 "Fw_y=me*g" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_Fw_ELECTRON_EARTH_12_0 (* m_ELECTRON g_EARTH)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:58:19.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 3 INCORRECT 6 "Fw_y=me*g_y" Undefined variable: g_y 1 Joint Explanation Experimental WT-LAW S0705 S0705-Feb05-15-58-43 2007-02-05 17:58:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 4 CORRECT 6 "Fw=me*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH)) S0705 S0705-Feb05-15-58-43 2007-02-05 17:58:36.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 3 INCORRECT 7 "Fw=Fw_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_12 Yc_Fw_ELECTRON_EARTH_12_0) S0705 S0705-Feb05-15-58-43 2007-02-05 17:58:49.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 1 INCORRECT 7 "a_y" Unable to solve for a_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:58:49.0 US/Eastern DELETION ELEC* ELEC6A 7 Delete Joint Explanation Experimental S0705 S0705-Feb05-15-58-43 2007-02-05 17:58:57.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 2 INCORRECT 7 "d_y" Unable to solve for d_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 14:41:35.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 1 CORRECT System-1 label="Q";body=particle;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0707 S0707-Feb09-14-33-09 2007-02-09 14:41:35.0 US/Eastern DELETION FOR* FOR4C Axes-2 Delete label=NIL Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 14:41:35.0 US/Eastern DELETION FOR* FOR4C Vector-3 Delete label=NIL Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 14:42:54.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 CORRECT Vector-4 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=100 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0707 S0707-Feb09-14-33-09 2007-02-09 14:43:10.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 INCORRECT 0 "Q=-7.9e-6" Undefined variable: Q 1 Joint Explanation Experimental DEFINE-CHARGE 13 S0707 S0707-Feb09-14-33-09 2007-02-09 14:43:15.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 HINT Var-5 label=q Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Joint Explanation Experimental DEFINE-CHARGE S0707 S0707-Feb09-14-33-09 2007-02-09 14:43:51.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 3 CORRECT Var-5 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Joint Explanation Experimental DEFINE-CHARGE 21 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0707 S0707-Feb09-14-33-09 2007-02-09 14:43:57.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Q_PARTICLE (DNUM -7.9 $mC))) 1 INCORRECT 0 "q=-7.9e-6" Forgot to put units on a number. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Q_PARTICLE (- 7.900000000000001e-6)) S0707 S0707-Feb09-14-33-09 2007-02-09 14:44:02.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Q_PARTICLE (DNUM -7.9 $mC))) 2 CORRECT 0 "q=-7.9e-6 C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0707 S0707-Feb09-14-33-09 2007-02-09 14:46:19.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 INCORRECT 1 "F=E*q" Undefined variable: F 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 20 S0707 S0707-Feb09-14-33-09 2007-02-09 14:46:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT Vector-4 label=F Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0707 S0707-Feb09-14-33-09 2007-02-09 14:47:03.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 INCORRECT Vector-6 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=101 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0707 S0707-Feb09-14-33-09 2007-02-09 14:47:22.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 4 INCORRECT Vector-6 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=203;mag=83 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0707 S0707-Feb09-14-33-09 2007-02-09 14:47:47.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 INCORRECT 1 "F=E*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0707 S0707-Feb09-14-33-09 2007-02-09 14:48:04.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 5 INCORRECT Vector-6 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=83 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 19 S0707 S0707-Feb09-14-33-09 2007-02-09 14:48:27.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 2 "E=14.3e3 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 27 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0707 S0707-Feb09-14-33-09 2007-02-09 14:48:31.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 2 INCORRECT 1 "F=E*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0707 S0707-Feb09-14-33-09 2007-02-09 14:48:31.0 US/Eastern DELETION FOR* FOR4C 1 Delete Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 14:48:49.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 3 INCORRECT 3 "F=E*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0707 S0707-Feb09-14-33-09 2007-02-09 14:48:56.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 6 HINT Vector-6 label=F Do you really want the direction of that vector to be 22 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0707 S0707-Feb09-14-33-09 2007-02-09 14:49:52.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 7 CORRECT Vector-6 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=83 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0707 S0707-Feb09-14-33-09 2007-02-09 14:49:56.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 4 INCORRECT 3 "F=E*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0707 S0707-Feb09-14-33-09 2007-02-09 14:50:19.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 5 INCORRECT 3 "F=E*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0707 S0707-Feb09-14-33-09 2007-02-09 14:50:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 6 INCORRECT 3 "Force=E*q" Undefined variable: Force 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN S0707 S0707-Feb09-14-33-09 2007-02-09 14:50:35.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= Q_PARTICLE (DNUM -7.9 $mC))) 3 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN S0707 S0707-Feb09-14-33-09 2007-02-09 14:51:06.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 7 INCORRECT 3 "F=(-7.9e-6)*(14.3e3)" The units in this equation are not consistent. If this is a symbolic equation, there is probably an error: check all your terms. Another possibility is that a number has been used without correct associated units. 1 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (- 7.900000000000001e-6) 14300.0)) S0707 S0707-Feb09-14-33-09 2007-02-09 14:51:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 8 INCORRECT 3 "F=(-7.9e-6)*(14.3e3) n" Syntax error in F=(-7.9e-6)*(14.3e3) n 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 26 ? S0707 S0707-Feb09-14-33-09 2007-02-09 14:51:15.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= Q_PARTICLE (DNUM -7.9 $mC))) 4 HINT The equation or the units in it are not in a recognizable form. 2 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN S0707 S0707-Feb09-14-33-09 2007-02-09 14:51:21.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 9 INCORRECT 3 "F=(-7.9e-6)*(14.3e3) N" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (* (- 7.900000000000001e-6) 14300.0) (DNUM 1 N))) S0707 S0707-Feb09-14-33-09 2007-02-09 14:51:21.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 10 INCORRECT 3 "F=(-7.9e-6)*(14.3e3) N" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (* (- 7.900000000000001e-6) 14300.0) (DNUM 1 N))) S0707 S0707-Feb09-14-33-09 2007-02-09 14:51:21.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 11 INCORRECT 3 "F=(-7.9e-6)*(14.3e3) N" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_PARTICLE_UNSPECIFIED_1 (* (* (- 7.900000000000001e-6) 14300.0) (DNUM 1 N))) S0707 S0707-Feb09-14-33-09 2007-02-09 14:51:21.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 12 INCORRECT 3 "F=(-7.9e-6)*(14.3e3) N" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Fe_PARTICLE_UNSPECIFIED_1 (* (* (- 7.900000000000001e-6) 14300.0) (DNUM 1 N))) S0707 S0707-Feb09-14-33-09 2007-02-09 14:51:54.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 13 CORRECT 3 "F=abs(q)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 62 (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED)) S0707 S0707-Feb09-14-33-09 2007-02-09 14:52:02.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 1 "F" Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 14:52:09.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 "F = 0.11297 N" Joint Explanation Experimental 87 S0707 S0707-Feb09-14-33-09 2007-02-09 15:01:36.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0707 S0707-Feb09-14-33-09 2007-02-09 15:01:47.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-COMPO-FORM-AXES 25 S0707 S0707-Feb09-14-33-09 2007-02-09 15:02:50.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 CORRECT Vector-669 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=126 Joint Explanation Experimental DRAW-WEIGHT S0707 S0707-Feb09-14-33-09 2007-02-09 15:03:30.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-670 label="FE";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=170 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0707 S0707-Feb09-14-33-09 2007-02-09 15:03:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT 0 "qe=-1.60e-19 C" Undefined variable: qe 1 Joint Explanation Experimental DEFINE-CHARGE 24 S0707 S0707-Feb09-14-33-09 2007-02-09 15:04:08.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-671 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 32 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0707 S0707-Feb09-14-33-09 2007-02-09 15:04:09.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Q_ELECTRON (DNUM -1.5999999999999998e-19 C))) 1 CORRECT 0 "qe=-1.60e-19 C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0707 S0707-Feb09-14-33-09 2007-02-09 15:04:33.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-672 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 39 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:04:42.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= m_ELECTRON (DNUM 9.11e-31 kg))) 1 CORRECT 1 "me= 9.11e-31 kg" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= m_ELECTRON (DNUM 9.11e-31 kg)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:06:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 CORRECT 2 "Fg-FE=0" Joint Explanation Experimental COMPO-ZERO-VECTOR (= (- Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) 0) S0707 S0707-Feb09-14-33-09 2007-02-09 15:06:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 2 "Fg-FE=0" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (- Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) 0) S0707 S0707-Feb09-14-33-09 2007-02-09 15:06:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 2 "Fg-FE=0" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= (- Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) 0) S0707 S0707-Feb09-14-33-09 2007-02-09 15:06:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 2 "Fg-FE=0" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (- Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) 0) S0707 S0707-Feb09-14-33-09 2007-02-09 15:06:19.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 INCORRECT 3 "FE_y" Unable to solve for FE_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:06:54.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 CORRECT 2 "Fg=me*g" Joint Explanation Experimental WT-LAW 40 (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:07:00.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 2 CORRECT 3 "Fg" Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:07:43.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 2 CORRECT 4 "FE=Fg" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0707 S0707-Feb09-14-33-09 2007-02-09 15:07:43.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 2 CORRECT 4 "FE=Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0707 S0707-Feb09-14-33-09 2007-02-09 15:07:43.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 2 CORRECT 4 "FE=Fg" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0707 S0707-Feb09-14-33-09 2007-02-09 15:07:43.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 2 CORRECT 4 "FE=Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0707 S0707-Feb09-14-33-09 2007-02-09 15:07:51.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 3 INCORRECT 5 "FE_y" Unable to solve for FE_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:08:04.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 4 CORRECT 5 "FE" Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:09:48.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-673 label="Ef";type=E-field;body=region;agent=Unspecified;time=NIL;dir=90;mag=165 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 39 S0707 S0707-Feb09-14-33-09 2007-02-09 15:10:07.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 HINT Vector-673 label=Ef Do you really want the direction of that vector to be 90 degrees? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0707 S0707-Feb09-14-33-09 2007-02-09 15:10:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 CORRECT Vector-673 label="Ef";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=165 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0707 S0707-Feb09-14-33-09 2007-02-09 15:11:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 6 "Ef=(FE)/abs(qe)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 74 (= E_REGION_UNSPECIFIED (/ Fe_ELECTRON_UNSPECIFIED_1 (ABS Q_ELECTRON))) S0707 S0707-Feb09-14-33-09 2007-02-09 15:11:18.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 5 CORRECT 7 "Ef" Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:11:45.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 CORRECT Answer-1 "Ef = 5.58e-11 N/C" Joint Explanation Experimental 99 S0707 S0707-Feb09-14-33-09 2007-02-09 15:23:01.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-1 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 9 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0707 S0707-Feb09-14-33-09 2007-02-09 15:23:13.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-2 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 12 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:23:37.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-3 label="Ef";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=67 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0707 S0707-Feb09-14-33-09 2007-02-09 15:23:48.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 0 "Ef=2.00e4 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 16 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:23:48.0 US/Eastern DELETION ELEC* ELEC3A Axes-4 Delete label=NIL Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:24:19.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 1 CORRECT Axes-5 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 26 S0707 S0707-Feb09-14-33-09 2007-02-09 15:24:54.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-6 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.50 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 25 S0707 S0707-Feb09-14-33-09 2007-02-09 15:25:26.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Var-6 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0;value="0" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0707 S0707-Feb09-14-33-09 2007-02-09 15:26:18.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-7 label="Fe";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=62 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0707 S0707-Feb09-14-33-09 2007-02-09 15:26:18.0 US/Eastern DELETION ELEC* ELEC3A Var-6 Delete label=s Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:28:38.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 CORRECT 1 "Fe=Ef*abs(qe)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 37 (= Fe_ELECTRON_PLATES_12 (* E_REGION_PLATES (ABS Q_ELECTRON))) S0707 S0707-Feb09-14-33-09 2007-02-09 15:28:44.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 CORRECT 2 "Fe" Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:28:44.0 US/Eastern DELETION ELEC* ELEC3A Vector-8 Delete label=NIL Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:30:18.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-9 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T0;dir=90;mag=110 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP 36 S0707 S0707-Feb09-14-33-09 2007-02-09 15:30:33.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-9 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=110 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP 37 S0707 S0707-Feb09-14-33-09 2007-02-09 15:30:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 3 "a=Fe/me" Joint Explanation Experimental (= a_ELECTRON_12 (/ Fe_ELECTRON_PLATES_12 m_ELECTRON)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:30:57.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 2 CORRECT 4 "a" Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:31:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 INCORRECT Vector-10 label="v0";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=144 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT 36 S0707 S0707-Feb09-14-33-09 2007-02-09 15:31:41.0 US/Eastern DELETION ELEC* ELEC3A Vector-10 Delete label=v0 Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:31:56.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 CORRECT Vector-11 label="v0";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0707 S0707-Feb09-14-33-09 2007-02-09 15:32:06.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 CORRECT Vector-12 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=96 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT 37 S0707 S0707-Feb09-14-33-09 2007-02-09 15:34:18.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 2 INCORRECT 5 "vf^2=v0^2+2*a*(.0150)" Forgot to put units on a number. 1 Joint Explanation Experimental 36 (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) 0.015))) S0707 S0707-Feb09-14-33-09 2007-02-09 15:34:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 3 TRUE_BUT_IRRELEVANT 5 "vf^2=v0^2+2*a*(.0150 m)" Joint Explanation Experimental (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) (DNUM 0.015 m)))) S0707 S0707-Feb09-14-33-09 2007-02-09 15:34:34.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 3 CORRECT 6 "vf" Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:34:49.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.03e7 m/s" Joint Explanation Experimental 61 S0707 S0707-Feb09-14-33-09 2007-02-09 15:47:08.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0707 S0707-Feb09-14-33-09 2007-02-09 15:47:25.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 25 S0707 S0707-Feb09-14-33-09 2007-02-09 15:47:49.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-669 label="Ef";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=142 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0707 S0707-Feb09-14-33-09 2007-02-09 15:48:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 0 "Ef=4.00e-12 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 29 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:48:27.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-670 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:48:27.0 US/Eastern DELETION ELEC* ELEC6A Var-671 Delete label=NIL Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:48:46.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-672 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 36 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0707 S0707-Feb09-14-33-09 2007-02-09 15:50:02.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-673 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=165 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0707 S0707-Feb09-14-33-09 2007-02-09 15:50:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 1 "vi= 4.30 m/s" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 40 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:50:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-674 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=145 Joint Explanation Experimental DRAW-WEIGHT S0707 S0707-Feb09-14-33-09 2007-02-09 15:51:19.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-675 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=270;mag=167 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 39 S0707 S0707-Feb09-14-33-09 2007-02-09 15:51:24.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-675 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=167 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 40 S0707 S0707-Feb09-14-33-09 2007-02-09 15:51:56.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-676 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0707 S0707-Feb09-14-33-09 2007-02-09 15:52:02.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 1 CORRECT 2 "vf= 0.00 m/s" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0.0 m/s)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:52:55.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 1 INCORRECT 3 "Fe_y= (Ef_y)*(abs(q))" Undefined variable: q 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 39 S0707 S0707-Feb09-14-33-09 2007-02-09 15:53:03.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 2 INCORRECT 3 "Fe_y= (Ef_y)*(abs(qe))" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (* Yc_E_REGION_UNSPECIFIED_0 (ABS Q_ELECTRON))) S0707 S0707-Feb09-14-33-09 2007-02-09 15:53:17.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Q_ELECTRON (DNUM -1.5999999999999998e-19 C))) 1 CORRECT 4 "qe= -1.60e-19 C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0707 S0707-Feb09-14-33-09 2007-02-09 15:53:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Q_ELECTRON (DNUM -1.5999999999999998e-19 C))) 2 INCORRECT 3 "Fe_y= (Ef_y)*abs(qe)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (* Yc_E_REGION_UNSPECIFIED_0 (ABS Q_ELECTRON))) S0707 S0707-Feb09-14-33-09 2007-02-09 15:53:26.0 US/Eastern DELETION ELEC* ELEC6A 3 Delete Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:53:26.0 US/Eastern DELETION ELEC* ELEC6A 4 Delete Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:53:32.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Q_ELECTRON (DNUM -1.5999999999999998e-19 C))) 3 CORRECT 3 "qe= -1.60e-19 C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0707 S0707-Feb09-14-33-09 2007-02-09 15:54:08.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 4 "Fe_y = Ef*abs(qe)" Although equation 5 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 45 (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON))) S0707 S0707-Feb09-14-33-09 2007-02-09 15:54:08.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 1 CORRECT 4 "Fe_y = Ef*abs(qe)" Although equation 5 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 45 (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON))) S0707 S0707-Feb09-14-33-09 2007-02-09 15:54:15.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC6A CALC_REQUEST 1 HINT It is good practice to identify the fundamental principles you are using by writing them purely symbolically in standard form before combining them with other equations or given values. Select "Review Physics Equations" on the Help Menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:54:38.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC6A CALC_REQUEST 2 HINT A good solution would include the definition of electric field magnitude, written as a separate equation. 3 3 Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:55:10.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 3 CORRECT 5 "Fe_y" Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:55:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Q_ELECTRON (DNUM -1.5999999999999998e-19 C))) 4 CORRECT 5 "Fe_y = 6.4e-31 N" Although equation 6 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (DNUM 6.399999999999999e-31 N)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:55:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 2 CORRECT 5 "Fe_y = 6.4e-31 N" Although equation 6 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (DNUM 6.399999999999999e-31 N)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:55:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 CORRECT 5 "Fe_y = 6.4e-31 N" Although equation 6 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (DNUM 6.399999999999999e-31 N)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:55:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 2 CORRECT 5 "Fe_y = 6.4e-31 N" Although equation 6 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (DNUM 6.399999999999999e-31 N)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:55:16.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 HINT It is good practice to identify the fundamental principles you are using by writing them purely symbolically in standard form before combining them with other equations or given values. Select "Review Physics Equations" on the Help Menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental WT-LAW S0707 S0707-Feb09-14-33-09 2007-02-09 15:55:17.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 2 HINT A good solution would include the definition of electric field magnitude, written as a separate equation. 3 3 Joint Explanation Experimental WT-LAW S0707 S0707-Feb09-14-33-09 2007-02-09 15:55:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 3 INCORRECT 6 "Fg_y=me*g" Joint Explanation Experimental WT-LAW (= Yc_Fw_ELECTRON_EARTH_12_0 (* m_ELECTRON g_EARTH)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:55:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 4 INCORRECT 6 "Fg_y=me*g" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_Fw_ELECTRON_EARTH_12_0 (* m_ELECTRON g_EARTH)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:56:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 5 CORRECT 6 "Fg=me*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:56:40.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 4 CORRECT 7 "Fg" Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:56:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 1 INCORRECT 8 "Fg_y = Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_Fw_ELECTRON_EARTH_12_0 Fw_ELECTRON_EARTH_12) S0707 S0707-Feb09-14-33-09 2007-02-09 15:56:45.0 US/Eastern DELETION ELEC* ELEC6A 8 Delete Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:58:14.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-677 label="af";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=96 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN S0707 S0707-Feb09-14-33-09 2007-02-09 15:58:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 1 INCORRECT 8 "Fg+Fe_y=me*af" Joint Explanation Experimental (= (+ Fw_ELECTRON_EARTH_12 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) (* m_ELECTRON a_ELECTRON_12)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:58:47.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 2 TRUE_BUT_IRRELEVANT 8 "Fg-Fe_y=me*af" Joint Explanation Experimental (= (- Fw_ELECTRON_EARTH_12 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) (* m_ELECTRON a_ELECTRON_12)) S0707 S0707-Feb09-14-33-09 2007-02-09 15:58:55.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 5 CORRECT 9 "af" Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 15:59:50.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-678 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0707 S0707-Feb09-14-33-09 2007-02-09 16:00:25.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Var-678 label="s0";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0;value="" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0707 S0707-Feb09-14-33-09 2007-02-09 16:00:35.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT Var-678 label="s01";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0;value="" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0707 S0707-Feb09-14-33-09 2007-02-09 16:00:35.0 US/Eastern DELETION ELEC* ELEC6A Var-678 Delete label=s01 Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 16:01:16.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 CORRECT Vector-679 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=65 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0707 S0707-Feb09-14-33-09 2007-02-09 16:01:23.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 INCORRECT 10 "vf^2=vi^2+2*af*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0707 S0707-Feb09-14-33-09 2007-02-09 16:01:23.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 INCORRECT 10 "vf^2=vi^2+2*af*d" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0707 S0707-Feb09-14-33-09 2007-02-09 16:01:23.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 INCORRECT 10 "vf^2=vi^2+2*af*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0707 S0707-Feb09-14-33-09 2007-02-09 16:01:30.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A No Intepretation 3 HINT 10 You used af, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 16:01:54.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A No Intepretation 4 INCORRECT 10 "vf^2=vi^2-2*ad*d" Undefined variable: ad 1 Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 16:01:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 5 TRUE_BUT_IRRELEVANT 10 "vf^2=vi^2-2*af*d" Joint Explanation Experimental (= (^ v_ELECTRON_2 2) (- (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0707 S0707-Feb09-14-33-09 2007-02-09 16:02:04.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 6 CORRECT 11 "d" Joint Explanation Experimental S0707 S0707-Feb09-14-33-09 2007-02-09 16:02:22.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC6A Answer-1 1 CORRECT Answer-1 "1.02 m" Joint Explanation Experimental 70 S0708 S0708-Feb09-14-24-45 2007-02-09 14:33:27.0 US/Eastern ATTEMPT Variable RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 INCORRECT Var-1 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6" Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE (= Q_PARTICLE (- 7.900000000000001e-6)) S0708 S0708-Feb09-14-24-45 2007-02-09 14:33:44.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 CORRECT Var-1 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Joint Explanation Experimental DEFINE-CHARGE 10 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0708 S0708-Feb09-14-24-45 2007-02-09 14:34:46.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:35:33.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 CORRECT Vector-2 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=105 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 11 S0708 S0708-Feb09-14-24-45 2007-02-09 14:35:51.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (BODY PARTICLE TIME NIL) 1 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Joint Explanation Experimental DRAW-BODY S0708 S0708-Feb09-14-24-45 2007-02-09 14:36:18.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 2 CORRECT System-3 label="q";body=particle;time=NIL Joint Explanation Experimental DRAW-BODY 21 S0708 S0708-Feb09-14-24-45 2007-02-09 14:37:24.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (DRAW-AXES 0) 1 HINT It is now a good idea for you to draw an axis. This will help to ground your work and be useful later on in the process. 1 Joint Explanation Experimental DRAW-UNROTATED-AXES S0708 S0708-Feb09-14-24-45 2007-02-09 14:37:41.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 2 CORRECT Axes-4 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 32 S0708 S0708-Feb09-14-24-45 2007-02-09 14:38:01.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 HINT You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the electric field at the region due to an unspecified agent. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN S0708 S0708-Feb09-14-24-45 2007-02-09 14:38:01.0 US/Eastern DELETION FOR* FOR4C Var-5 Delete label=NIL Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 14:39:05.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 2 HINT Why don't you continue working on entering the given value of the magnitude of the electric field at the region due to an unspecified agent. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN S0708 S0708-Feb09-14-24-45 2007-02-09 14:39:11.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 3 HINT You can find the value of the magnitude of the electric field at the region due to an unspecified agent in the problem statement. 2 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN S0708 S0708-Feb09-14-24-45 2007-02-09 14:39:44.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 4 CORRECT 0 "E=14.3e3 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 39 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0708 S0708-Feb09-14-24-45 2007-02-09 14:39:58.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 HINT Vector-4 label=F Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:40:00.0 US/Eastern CANCEL FOR* FOR4C Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 14:40:09.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT Vector-4 label=F Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:40:10.0 US/Eastern CANCEL FOR* FOR4C Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 14:40:12.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 HINT Vector-4 label=F Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:40:21.0 US/Eastern CANCEL FOR* FOR4C Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 14:41:04.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 4 HINT Vector-4 label=F Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:41:11.0 US/Eastern CANCEL FOR* FOR4C Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 14:41:54.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 5 INCORRECT 1 "k=8.988e9" Undefined variable: k 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:41:54.0 US/Eastern DELETION FOR* FOR4C 1 Delete Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 14:42:33.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 6 HINT Vector-4 label=F Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:43:10.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 7 HINT #.(wb-quant '(define-variable "F" |Electric| |force| |particle| |T0| |Unspecified| NIL "") 'mag) Right. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:43:45.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 8 HINT charge-force-efield-mag Right indeed. A good step would be introducing a variable for the magnitude of the electric force on the particle at T0 due to an unspecified agent. 3 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:44:24.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 9 HINT Why don't you continue with the solution by working on applying the definition of electric field magnitude at the particle at T0. 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:44:25.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 10 HINT A good step would be introducing a variable for the magnitude of the electric force on the particle at T0 due to an unspecified agent. 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:44:27.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 11 HINT Think about how the direction of the electric force on the particle due to an unspecified agent is related to the direction of the electric field vector. 3 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:44:59.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 12 INCORRECT 1 "F=abs(q)*E" Undefined variable: F 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:44:59.0 US/Eastern DELETION FOR* FOR4C Var-6 Delete label=NIL Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 14:46:17.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 13 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=25;mag=70 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:46:23.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 14 HINT Vector-7 label=F Do you really want the direction of that vector to be 25 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:46:35.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 15 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=70 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 37 S0708 S0708-Feb09-14-24-45 2007-02-09 14:47:01.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 16 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=71 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:47:04.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 17 HINT Vector-7 label=F Do you really want the direction of that vector to be 22 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:47:06.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 18 HINT Think about how the direction of the electric force on the particle due to an unspecified agent is related to the direction of the electric field vector. 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:47:46.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 19 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=248;mag=71 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:48:12.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 20 CORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=71 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:48:16.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 CORRECT 1 "F=abs(q)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 72 (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED)) S0708 S0708-Feb09-14-24-45 2007-02-09 14:48:24.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 2 "F" Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 14:48:45.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 "0.113 N" Joint Explanation Experimental 97 S0708 S0708-Feb09-14-24-45 2007-02-09 14:49:00.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C Unknown 1 HINT You have completed all of the principle applications necessary to solve this problem. Right click in the first empty line in the equation pane and use 'Solve For...' to find a value for the sought quantity (if you have not already) and then enter that value in the answer box. 1 1 Joint Explanation Experimental 92 S0708 S0708-Feb09-14-24-45 2007-02-09 14:51:16.0 US/Eastern DELETION ELEC* ELEC1C Axes-667 Delete label=NIL Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 14:51:59.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-COMPO-FORM-AXES 15 S0708 S0708-Feb09-14-24-45 2007-02-09 14:52:10.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-669 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 25 S0708 S0708-Feb09-14-24-45 2007-02-09 14:52:39.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 2 INCORRECT System-670 label="Earth";body=earth;time=NIL Joint Explanation Experimental DRAW-BODY 23 S0708 S0708-Feb09-14-24-45 2007-02-09 14:53:15.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT Var-671 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value=".106e-19" Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE 22 (= Q_ELECTRON 1.0600000000000001e-20) S0708 S0708-Feb09-14-24-45 2007-02-09 14:53:26.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 INCORRECT Var-671 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value=".106e-19 C" Joint Explanation Experimental DEFINE-CHARGE (= Q_ELECTRON (DNUM 1.0600000000000001e-20 C)) S0708 S0708-Feb09-14-24-45 2007-02-09 14:53:40.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 3 INCORRECT Var-671 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.06e-19 C" Joint Explanation Experimental DEFINE-CHARGE (= Q_ELECTRON (- (DNUM 1.0600000000000001e-19 C))) S0708 S0708-Feb09-14-24-45 2007-02-09 14:53:50.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 4 CORRECT Var-671 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.6e-19 C" Joint Explanation Experimental DEFINE-CHARGE 30 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0708 S0708-Feb09-14-24-45 2007-02-09 14:54:11.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-672 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 38 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0708 S0708-Feb09-14-24-45 2007-02-09 14:54:55.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 INCORRECT Vector-673 label="F";type=Force;body=electron;agent=earth;forcetype=Electric;time=T0;dir=90;mag=81 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 37 S0708 S0708-Feb09-14-24-45 2007-02-09 14:54:59.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 HINT Vector-673 label=F Is the force is due to the earth? 1 Joint Explanation Experimental DRAW-WEIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 14:54:59.0 US/Eastern DELETION ELEC* ELEC1C Vector-673 Delete label=F Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 14:55:51.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 2 CORRECT Vector-674 label="F";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=74 Joint Explanation Experimental DRAW-WEIGHT 38 S0708 S0708-Feb09-14-24-45 2007-02-09 14:56:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 2 CORRECT Vector-675 label="Efield";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=58 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 14:57:02.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 3 CORRECT Vector-674 label="wieght";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=74 Joint Explanation Experimental DRAW-WEIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 14:57:13.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 4 CORRECT Vector-674 label="weight";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=74 Joint Explanation Experimental DRAW-WEIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 14:57:49.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental WT-LAW S0708 S0708-Feb09-14-24-45 2007-02-09 14:58:14.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 2 HINT #.(wb-quant '(define-variable "E" |NIL| |E-field| |region| |NIL| |earth| NIL "") 'mag) That quantity is not mentioned in the Andes solution. 2 Joint Explanation Experimental WT-LAW S0708 S0708-Feb09-14-24-45 2007-02-09 14:58:35.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 3 HINT #.(wb-quant '(define-variable "E" |NIL| |E-field| |region| |NIL| |electron| NIL "") 'mag) That quantity is not mentioned in the Andes solution. 3 Joint Explanation Experimental WT-LAW S0708 S0708-Feb09-14-24-45 2007-02-09 14:59:19.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 4 HINT #.(wb-quant '(define-variable "E" |NIL| |E-field| |region| |NIL| |earth| NIL "") 'yc) That quantity is not mentioned in the Andes solution. Let's just assume that you are seeking the magnitude of the electric field at the region due to an unspecified agent. 4 4 Joint Explanation Experimental WT-LAW S0708 S0708-Feb09-14-24-45 2007-02-09 14:59:25.0 US/Eastern HINT_REQUEST Choose- HINT_MSG Ask-Principle ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 5 HINT "OK" What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 5 Joint Explanation Experimental WT-LAW S0708 S0708-Feb09-14-24-45 2007-02-09 14:59:42.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 6 HINT charge-force-efield-mag Yes. Your goal should be introducing a variable for the magnitude of the electric field at the region due to an unspecified agent. 6 Joint Explanation Experimental WT-LAW S0708 S0708-Feb09-14-24-45 2007-02-09 15:00:08.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 7 CORRECT 0 "weight=m*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:00:42.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 3 INCORRECT 1 "Efield=weight/abs(q)" Units are inconsistent. 1 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR (= Fe_ELECTRON_UNSPECIFIED_1 (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:01:40.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 4 INCORRECT 1 "weight=abs(q)*Efield" Units are inconsistent. 1 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR (= Fw_ELECTRON_EARTH_1 (* (ABS Q_ELECTRON) Fe_ELECTRON_UNSPECIFIED_1)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:01:44.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 5 HINT Why don't you continue with the solution by working on applying the definition of electric field magnitude at the electron at T0. 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:01:52.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 6 HINT You should be introducing a variable for the magnitude of the electric field at the region due to an unspecified agent. 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:02:13.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 7 INCORRECT 1 "weight=abs(q)*Efield_y" Units are inconsistent. 1 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR (= Fw_ELECTRON_EARTH_1 (* (ABS Q_ELECTRON) Yc_Fe_ELECTRON_UNSPECIFIED_1_0)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:02:17.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 8 HINT Why don't you continue working on applying the definition of electric field magnitude at the electron at T0. 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:02:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 9 HINT A good step would be introducing a variable for the magnitude of the electric field at the region due to an unspecified agent. 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:04:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 10 CORRECT Vector-675 label="Efield";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=58 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:05:06.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-676 label="Efielde";type=E-field;body=region;agent=earth;time=NIL;dir=90;mag=43 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:05:27.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 HINT Vector-676 label=Efielde Is the earth the source of the electric field you are defining? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:05:43.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 INCORRECT Vector-676 label="Efielde";type=E-field;body=region;agent=Unspecified;time=NIL;dir=90;mag=43 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:05:46.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 HINT Vector-676 label=Efielde Do you really want the direction of that vector to be 90 degrees? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:05:46.0 US/Eastern DELETION ELEC* ELEC1C Vector-675 Delete label=Efield Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:06:09.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 INCORRECT Vector-676 label="Efielde";type=E-field;body=region;agent=Unspecified;time=NIL;dir=180;mag=43 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 37 S0708 S0708-Feb09-14-24-45 2007-02-09 15:06:13.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 6 HINT Vector-676 label=Efielde Do you really want the direction of that vector to be 180 degrees? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:06:14.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 7 HINT You can determine the direction of the electric field at the region due to an unspecified agent from the problem statement 2 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:06:47.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 8 HINT Use the electric field drawing tool to draw the electric field at the region due to an unspecified agent in the given direction of 270 degrees. 3 3 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 32 S0708 S0708-Feb09-14-24-45 2007-02-09 15:07:07.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 9 CORRECT Vector-676 label="Efielde";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=43 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:07:20.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 1 "weight=abs(q)*Efielde" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 53 (= Fw_ELECTRON_EARTH_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:07:20.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 1 CORRECT 1 "weight=abs(q)*Efielde" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NFL-COMPO 53 (= Fw_ELECTRON_EARTH_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:07:20.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 1 CORRECT 1 "weight=abs(q)*Efielde" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 53 (= Fw_ELECTRON_EARTH_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:07:20.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 1 CORRECT 1 "weight=abs(q)*Efielde" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 53 (= Fw_ELECTRON_EARTH_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:07:48.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 2 CORRECT 1 "Efielde=weight/abs(q)" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:07:48.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 2 CORRECT 1 "Efielde=weight/abs(q)" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NFL-COMPO (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:07:48.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 2 CORRECT 1 "Efielde=weight/abs(q)" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:07:48.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 2 CORRECT 1 "Efielde=weight/abs(q)" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:07:50.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 8 HINT It is good practice to identify the fundamental principles you are using by writing them purely symbolically in standard form before combining them with other equations or given values. Select "Review Physics Equations" on the Help Menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental WT-LAW S0708 S0708-Feb09-14-24-45 2007-02-09 15:08:07.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 9 HINT A good solution would include Newton's second law and the definition of electric field, written as separate equations. 3 3 Joint Explanation Experimental WT-LAW S0708 S0708-Feb09-14-24-45 2007-02-09 15:08:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 10 CORRECT 2 "weight=m*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:08:24.0 US/Eastern DELETION ELEC* ELEC1C 2 Delete Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:08:24.0 US/Eastern DELETION ELEC* ELEC1C 1 Delete Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:08:37.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 3 CORRECT 2 "Efielde=weight/abs(q)" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 53 (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:08:37.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 3 CORRECT 2 "Efielde=weight/abs(q)" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NFL-COMPO 53 (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:08:37.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 3 CORRECT 2 "Efielde=weight/abs(q)" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 53 (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:08:37.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 3 CORRECT 2 "Efielde=weight/abs(q)" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 53 (= E_REGION_UNSPECIFIED (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:08:53.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 4 CORRECT 1 "weight=Efielde*abs(q)" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:08:53.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 4 CORRECT 1 "weight=Efielde*abs(q)" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NFL-COMPO (= Fw_ELECTRON_EARTH_1 (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:08:53.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 4 CORRECT 1 "weight=Efielde*abs(q)" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Fw_ELECTRON_EARTH_1 (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:08:53.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 4 CORRECT 1 "weight=Efielde*abs(q)" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:09:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 11 INCORRECT 2 "Efield=(m*g)/abs(q)" Undefined variable: Efield 1 Joint Explanation Experimental WT-LAW S0708 S0708-Feb09-14-24-45 2007-02-09 15:09:38.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 12 CORRECT 2 "Efielde=(m*g)/abs(q)" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WT-LAW (= E_REGION_UNSPECIFIED (/ (* m_ELECTRON g_EARTH) (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:09:38.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 5 CORRECT 2 "Efielde=(m*g)/abs(q)" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (/ (* m_ELECTRON g_EARTH) (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:09:38.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 5 CORRECT 2 "Efielde=(m*g)/abs(q)" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NFL-COMPO (= E_REGION_UNSPECIFIED (/ (* m_ELECTRON g_EARTH) (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:09:38.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 5 CORRECT 2 "Efielde=(m*g)/abs(q)" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= E_REGION_UNSPECIFIED (/ (* m_ELECTRON g_EARTH) (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:09:38.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 5 CORRECT 2 "Efielde=(m*g)/abs(q)" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (/ (* m_ELECTRON g_EARTH) (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:10:59.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 11 INCORRECT 2 "Efielde+weight=0" Units are inconsistent. 1 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR (= (+ E_REGION_UNSPECIFIED Fw_ELECTRON_EARTH_1) 0) S0708 S0708-Feb09-14-24-45 2007-02-09 15:11:14.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 12 INCORRECT 2 "weight/abs(q)+weight=0" Units are inconsistent. 1 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR (= (+ (/ Fw_ELECTRON_EARTH_1 (ABS Q_ELECTRON)) Fw_ELECTRON_EARTH_1) 0) S0708 S0708-Feb09-14-24-45 2007-02-09 15:11:14.0 US/Eastern DELETION ELEC* ELEC1C 2 Delete Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:12:03.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 13 CORRECT Vector-677 label="Eforce";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=66 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 53 S0708 S0708-Feb09-14-24-45 2007-02-09 15:12:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 INCORRECT 1 "weight+Eforce=0" Joint Explanation Experimental COMPO-PARALLEL-AXIS 32 (= (+ Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) 0) S0708 S0708-Feb09-14-24-45 2007-02-09 15:12:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 2 INCORRECT 1 "weight+Eforce=0" Joint Explanation Experimental WRITE-NFL-COMPO 32 (= (+ Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) 0) S0708 S0708-Feb09-14-24-45 2007-02-09 15:12:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 3 INCORRECT 1 "weight+Eforce=0" Joint Explanation Experimental COMPO-PARALLEL-AXIS 32 (= (+ Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) 0) S0708 S0708-Feb09-14-24-45 2007-02-09 15:12:42.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 10 HINT System-670 label=Earth The closest matching CORRECT entry seems to be done already, so you really don't need to generate it again. If you want to anyway, click on Explain more. 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:13:23.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 11 INCORRECT Vector-678 label="Earth";type=E-field;body=region;agent=earth;time=NIL;dir=90;mag=40 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:13:26.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 4 HINT Vector-678 label=Earth The closest matching CORRECT entry seems to be done already, so you really don't need to generate it again. If you want to anyway, click on Explain more. 1 Joint Explanation Experimental COMPO-ZERO-VECTOR S0708 S0708-Feb09-14-24-45 2007-02-09 15:13:26.0 US/Eastern DELETION ELEC* ELEC1C Vector-678 Delete label=Earth Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:14:10.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 5 INCORRECT 1 "Efielde=Eforce" Units are inconsistent. 1 1 Joint Explanation Experimental COMPO-ZERO-VECTOR (= E_REGION_UNSPECIFIED Fe_ELECTRON_UNSPECIFIED_1) S0708 S0708-Feb09-14-24-45 2007-02-09 15:14:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 6 CORRECT 1 "weight=Eforce" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) S0708 S0708-Feb09-14-24-45 2007-02-09 15:14:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 6 CORRECT 1 "weight=Eforce" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) S0708 S0708-Feb09-14-24-45 2007-02-09 15:14:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 1 "weight=Eforce" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) S0708 S0708-Feb09-14-24-45 2007-02-09 15:14:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 1 "weight=Eforce" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) S0708 S0708-Feb09-14-24-45 2007-02-09 15:14:39.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 HINT 0 Why don't you continue working on applying the definition of electric field magnitude at the electron at T0. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0708 S0708-Feb09-14-24-45 2007-02-09 15:14:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 HINT 0 What is the relationship between the force, the charge and the electric field? 2 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0708 S0708-Feb09-14-24-45 2007-02-09 15:15:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 3 CORRECT 2 "Eforce=Efielde*abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 68 (= Fe_ELECTRON_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:16:01.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 INCORRECT 3 "Efielde_y" Unable to solve for Efielde_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:16:09.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 4 INCORRECT 2 "Eforce=Efield*abs(q)" Undefined variable: Efield 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 32 S0708 S0708-Feb09-14-24-45 2007-02-09 15:16:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 5 CORRECT 2 "Eforce=Efielde*abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 68 (= Fe_ELECTRON_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:16:29.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 2 INCORRECT 3 "Efielde_y" Unable to solve for Efielde_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:16:32.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 7 HINT Why don't you continue with the solution by working on applying Newton's second law to the electron at T0. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0708 S0708-Feb09-14-24-45 2007-02-09 15:16:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 8 HINT Notice that the electron is at rest at T0. 2 Joint Explanation Experimental ACCEL-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:16:43.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 9 HINT If a body is at rest throughout some time interval, its average acceleration during that interval is zero. 3 Joint Explanation Experimental ACCEL-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:17:09.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 7 INCORRECT 3 "m*a=0" Undefined variable: a 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 67 S0708 S0708-Feb09-14-24-45 2007-02-09 15:17:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 8 INCORRECT 3 "m*g=0" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (* m_ELECTRON g_EARTH) 0) S0708 S0708-Feb09-14-24-45 2007-02-09 15:17:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 9 INCORRECT 3 "0=Eforce+weight" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= 0 (+ Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:17:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 10 INCORRECT 3 "0=Eforce+weight" Joint Explanation Experimental WRITE-NFL-COMPO (= 0 (+ Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:17:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 11 INCORRECT 3 "0=Eforce+weight" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= 0 (+ Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:17:52.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 12 HINT 3 Think about the direction of the weight force on the electron at T0 due to the earth. 1 Joint Explanation Experimental COMPO-ZERO-VECTOR S0708 S0708-Feb09-14-24-45 2007-02-09 15:18:04.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 13 CORRECT 3 "0=Eforce-weight" Joint Explanation Experimental COMPO-ZERO-VECTOR (= 0 (- Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:18:04.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 10 CORRECT 3 "0=Eforce-weight" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= 0 (- Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:18:04.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 2 CORRECT 3 "0=Eforce-weight" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= 0 (- Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:18:04.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 2 CORRECT 3 "0=Eforce-weight" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= 0 (- Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:18:14.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 3 CORRECT 4 "Efielde" Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:18:27.0 US/Eastern ATTEMPT Answer RESULT Unsolicited ELEC* ELEC1C Answer-1 1 INCORRECT Answer-1 "5.58e-11 N/c" This expression contains variables not allowed in the answer: (c) 1 Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:18:32.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 2 CORRECT Answer-1 "5.58e-11 N/C" Joint Explanation Experimental 90 S0708 S0708-Feb09-14-24-45 2007-02-09 15:21:10.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-1 label="Eplate";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=82 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 5 S0708 S0708-Feb09-14-24-45 2007-02-09 15:21:10.0 US/Eastern DELETION ELEC* ELEC3A Axes-2 Delete label=NIL Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:21:28.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 1 CORRECT Axes-3 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 15 S0708 S0708-Feb09-14-24-45 2007-02-09 15:21:39.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 CORRECT System-4 label="electron";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 25 S0708 S0708-Feb09-14-24-45 2007-02-09 15:21:39.0 US/Eastern DELETION ELEC* ELEC3A Vector-5 Delete label=NIL Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:22:38.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-6 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 29 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:22:53.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-7 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 32 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:23:38.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-8 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value=".015 m" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:23:46.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Var-8 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.5 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 31 S0708 S0708-Feb09-14-24-45 2007-02-09 15:23:48.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Var-8 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:23:48.0 US/Eastern DELETION ELEC* ELEC3A Var-8 Delete label=s Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:24:38.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT 0 "F=me*a" Undefined variables: (F a) 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:24:38.0 US/Eastern DELETION ELEC* ELEC3A 0 Delete Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:25:13.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT Vector-9 label="Fplate";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0;dir=90;mag=52 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:25:15.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 2 HINT Vector-9 label=Fplate You don't need to draw the force at T0. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:25:24.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 3 HINT If you click on 'explain more', I'll tell you a correct entry to make. However, you'd learn more if you figure it out yourself, perhaps with the aid of the light bulb button's hints. 2 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:25:29.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 4 HINT You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the electric field at the region due to the plates. 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:25:40.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 5 HINT You can find the value of the magnitude of the electric field at the region due to the plates in the problem statement. 2 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN S0708 S0708-Feb09-14-24-45 2007-02-09 15:26:07.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 6 CORRECT Vector-1 label="Eplate";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=82 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:26:07.0 US/Eastern DELETION ELEC* ELEC3A Vector-10 Delete label=NIL Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:27:04.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 7 CORRECT Vector-1 label="Eplate";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=82 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:27:18.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 0 "Eplate=2.00e4 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 34 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:27:24.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Var-7 label=s You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:27:24.0 US/Eastern DELETION ELEC* ELEC3A Vector-9 Delete label=Fplate Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:27:40.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Var-7 label=s Why don't you continue working on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:27:44.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT Var-7 label=s Your goal should be introducing a variable for the magnitude of the displacement of the electron from T0 to T1. 2 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:28:00.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 INCORRECT Var-11 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.5 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:28:08.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 HINT Var-11 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:28:28.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 INCORRECT Var-11 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T1;value="1.5 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:28:31.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 HINT Var-11 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:28:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 10 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 2 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:28:39.0 US/Eastern DELETION ELEC* ELEC3A Vector-12 Delete label=NIL Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:28:39.0 US/Eastern DELETION ELEC* ELEC3A Var-11 Delete label=s Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:29:41.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 11 HINT Why don't you continue working on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:29:42.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 12 HINT Your goal should be introducing a variable for the magnitude of the displacement of the electron from T0 to T1. 2 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:29:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 13 HINT Notice that the electron is moving in a straight line from T0 to T1. 3 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:29:48.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 14 HINT Whenever an object is moving in a straight line over a time interval, it has a displacement which is parallel to the direction of motion. 4 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:29:55.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 15 HINT Because the electron is moving in a straight line from T0 to T1, use the displacement tool to draw a displacement vector for it in direction 90 degrees 5 5 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 29 S0708 S0708-Feb09-14-24-45 2007-02-09 15:30:16.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 16 CORRECT Vector-13 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=87 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:30:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 1 "d=.015 m" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 33 (= s_ELECTRON_12 (DNUM 0.015 m)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:30:35.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:31:03.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 HINT #.(wb-quant '(define-variable "v" |instantaneous| |velocity| |electron| |T1| |NIL| NIL "") 'mag) Right. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:32:31.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 3 HINT (lk-no-vf ((?axis . y))) That principle is part of a valid solution to this problem but you cannot use it as the first principle. What is the first principle application that you wish to work on? You should look for a principle that is related to the sought quantity indirectly. 3 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:32:58.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 4 HINT charge-force-efield-mag That principle is part of a valid solution to this problem but you cannot use it as the first principle. Lets just assume that you will work on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 4 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:33:23.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 5 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:33:26.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 6 HINT You should be choosing a particular kinematic equation containing the y component of the velocity of the electron at T1. 2 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:34:06.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 7 CORRECT Vector-14 label="vt1";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=67 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:34:54.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-15 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T0;dir=90;mag=47 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0708 S0708-Feb09-14-24-45 2007-02-09 15:34:58.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Vector-15 label=a You don't need to draw the accel at T0. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0708 S0708-Feb09-14-24-45 2007-02-09 15:35:13.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT Vector-15 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T1;dir=90;mag=47 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0708 S0708-Feb09-14-24-45 2007-02-09 15:35:15.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 HINT Vector-15 label=a You don't need to draw the accel at T1. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:35:46.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 2 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:35:48.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 3 HINT Try choosing a particular kinematic equation containing the y component of the velocity of the electron at T1. 2 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:35:50.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 4 HINT You should be drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 3 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:35:53.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 5 HINT Notice that the electron is momentarily at rest at T0. 4 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:35:55.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 6 HINT When an object is at rest even momentarily, its velocity at that moment is zero. 5 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:35:59.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 7 HINT Because the electron is at rest at T0, use the velocity tool to draw a zero-length velocity vector for it. 6 6 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST 28 S0708 S0708-Feb09-14-24-45 2007-02-09 15:36:21.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 8 CORRECT Vector-16 label="vt0";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:36:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 1 CORRECT 2 "vt0=0" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= v_ELECTRON_1 0) S0708 S0708-Feb09-14-24-45 2007-02-09 15:36:56.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 INCORRECT Vector-15 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T1;dir=90;mag=47 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0708 S0708-Feb09-14-24-45 2007-02-09 15:36:56.0 US/Eastern DELETION ELEC* ELEC3A Vector-15 Delete label=a Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:37:09.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 CORRECT Vector-17 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=74 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0708 S0708-Feb09-14-24-45 2007-02-09 15:37:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 3 "vt1^2=vt0^2+2*d*a" Joint Explanation Experimental (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 s_ELECTRON_12) a_ELECTRON_12))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:37:30.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 INCORRECT 4 "vt1" Unable to solve for vt1. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:37:35.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A No Intepretation 2 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:37:37.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A No Intepretation 3 HINT Try writing a constant acceleration equation in terms of vector components along the Y axis. 2 Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:37:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A No Intepretation 4 HINT Do you know an equation relating the components of initial velocity, final velocity, acceleration, and displacement when acceleration is constant? 3 Joint Explanation Experimental WRITE-LK-NO-T-COMPO S0708 S0708-Feb09-14-24-45 2007-02-09 15:38:25.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 5 INCORRECT 4 "Eplate*abs(q)=m*a" Undefined variable: m 1 Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:38:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 6 TRUE_BUT_IRRELEVANT 4 "Eplate*abs(q)=me*a" Joint Explanation Experimental (= (* E_REGION_PLATES (ABS Q_ELECTRON)) (* m_ELECTRON a_ELECTRON_12)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:38:36.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 2 CORRECT 5 "vt1" Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:38:54.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.027 e7 m/s" Joint Explanation Experimental 53 S0708 S0708-Feb09-14-24-45 2007-02-09 15:43:08.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-667 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 15 S0708 S0708-Feb09-14-24-45 2007-02-09 15:43:27.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-668 label="electron";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 25 S0708 S0708-Feb09-14-24-45 2007-02-09 15:43:46.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-669 label="Efield";type=E-field;body=region;agent=Unspecified;time=NIL;dir=0;mag=97 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 23 S0708 S0708-Feb09-14-24-45 2007-02-09 15:43:50.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 HINT Vector-669 label=Efield Do you really want the direction of that vector to be 0 degrees? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:43:50.0 US/Eastern DELETION ELEC* ELEC6A Vector-669 Delete label=Efield Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:44:20.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 INCORRECT Vector-670 label="Eearth";type=E-field;body=region;agent=earth;time=NIL;dir=90;mag=64 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 22 S0708 S0708-Feb09-14-24-45 2007-02-09 15:44:23.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 HINT Vector-670 label=Eearth Is the earth the source of the electric field you are defining? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:44:32.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 INCORRECT Vector-670 label="Eearth";type=E-field;body=region;agent=Unspecified;time=NIL;dir=90;mag=64 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:44:44.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 6 HINT Vector-670 label=Eearth Do you really want the direction of that vector to be 90 degrees? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:44:55.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 7 CORRECT Vector-670 label="Eearth";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=64 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:45:20.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 0 "Eearth=4.00e-12 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 27 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:45:40.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-671 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.6e-19 C" Joint Explanation Experimental DEFINE-CHARGE 31 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:45:53.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-672 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 35 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:46:24.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-673 label="v0";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=33 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:46:36.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 1 "v0=4.3 m/s" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 39 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:46:36.0 US/Eastern DELETION ELEC* ELEC6A Vector-674 Delete label=NIL Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:48:46.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-675 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=69 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0708 S0708-Feb09-14-24-45 2007-02-09 15:49:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 INCORRECT Vector-676 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=58 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN 38 S0708 S0708-Feb09-14-24-45 2007-02-09 15:49:43.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 HINT Vector-676 label=a Notice that the electron is slowing down. 1 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN S0708 S0708-Feb09-14-24-45 2007-02-09 15:49:55.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 3 CORRECT Vector-676 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=58 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN 39 S0708 S0708-Feb09-14-24-45 2007-02-09 15:49:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 INCORRECT 2 "Eearth*abs(qe)=m*a" Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST 38 (= (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON)) (* m_ELECTRON a_ELECTRON_12)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:50:02.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 2 HINT 2 What equation do you wish to write? 1 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:50:12.0 US/Eastern HINT_REQUEST Choose-Equation HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 3 HINT charge-force-efield-mag Equations of that type appear within the problem solution. You should write the equation in the form F = abs(q)*E using your own variables. If you do not want to write this equation and are not sure what to do, why don't you call Light-Bulb-Help. 2 2 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST 33 S0708 S0708-Feb09-14-24-45 2007-02-09 15:50:34.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 4 INCORRECT 2 "F=m*a" Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST (= Fe_ELECTRON_UNSPECIFIED_12 (* m_ELECTRON a_ELECTRON_12)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:50:55.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 5 INCORRECT 2 "Eearth*abs(qe)=m*a" Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST (= (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON)) (* m_ELECTRON a_ELECTRON_12)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:50:58.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 6 HINT 2 What equation do you wish to write? 1 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:51:14.0 US/Eastern HINT_REQUEST Choose-Equation HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 7 HINT (nsl ((?axis . y))) Equations of that type appear within the problem solution. You should write the equation in the form F1_y + F2_y + ... = m*a_y using your own variables. If you do not want to write this equation and are not sure what to do, why don't you call Light-Bulb-Help. 2 2 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST 28 S0708 S0708-Feb09-14-24-45 2007-02-09 15:51:21.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 8 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:51:40.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 9 HINT #.(wb-quant '(define-variable "s" |NIL| |distance| |electron| |T0 to T1| |NIL| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. 2 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:51:51.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 10 HINT #.(wb-quant '(define-variable "s" |NIL| |distance| |electron| |T1| |NIL| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. 3 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:52:29.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 11 HINT #.(wb-quant '(define-variable "d" |NIL| |displacement| |electron| |T0 to T1| |NIL| NIL "") 'yc) That quantity is not sought by the problem statement. Let's just assume that you are seeking the magnitude of the displacement of the electron from T0 to T1. 4 4 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:52:38.0 US/Eastern HINT_REQUEST Choose- HINT_MSG Ask-Principle ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 12 HINT "OK" What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 5 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:52:57.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 13 HINT (lk-no-t ((?axis . y))) Correct. A good step would be choosing a particular kinematic equation containing the y component of the acceleration of the electron from T0 to T1. 6 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:53:31.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 14 INCORRECT Vector-677 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=63 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:53:33.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Vector-677 label=vf Are you sure the velocity of the electron is non-zero at T1? 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:53:33.0 US/Eastern DELETION ELEC* ELEC6A Vector-677 Delete label=vf Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:53:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT 2 "Eearth*abs(qe)=m*a" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT (= (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON)) (* m_ELECTRON a_ELECTRON_12)) S0708 S0708-Feb09-14-24-45 2007-02-09 15:54:31.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 CORRECT Vector-678 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=69 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 15:54:36.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 INCORRECT 3 "0=v0^2+2*a*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= 0 (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:54:36.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 2 INCORRECT 3 "0=v0^2+2*a*d" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= 0 (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:54:36.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 3 INCORRECT 3 "0=v0^2+2*a*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= 0 (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:54:39.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 4 HINT 3 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0708 S0708-Feb09-14-24-45 2007-02-09 15:54:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 5 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS 23 S0708 S0708-Feb09-14-24-45 2007-02-09 15:54:55.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 6 CORRECT 3 "0=v0^2+2*a_y*d" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 29 (= 0 (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:54:55.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 CORRECT 3 "0=v0^2+2*a_y*d" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO 29 (= 0 (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:54:55.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 CORRECT 3 "0=v0^2+2*a_y*d" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 29 (= 0 (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:55:41.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 7 INCORRECT 4 "a_y=abs(a)*cos(180)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_a_ELECTRON_12_0 (* (ABS a_ELECTRON_12) (COS 180))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:55:50.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 8 INCORRECT 4 "a_y=abs(a)*cos(180)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_a_ELECTRON_12_0 (* (ABS a_ELECTRON_12) (COS 180))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:55:52.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 9 HINT 4 What equation do you wish to write? 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0708 S0708-Feb09-14-24-45 2007-02-09 15:55:57.0 US/Eastern HINT_REQUEST Choose-Equation HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 10 HINT (lk-no-t ((?axis . y))) Equations of that type appear within the problem solution. You should write the equation in the form v_y^2 = v0_y^2 + 2*a_y*d_y using your own variables. If you do not want to write this equation and are not sure what to do, why don't you call Light-Bulb-Help. 2 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS 24 S0708 S0708-Feb09-14-24-45 2007-02-09 15:55:57.0 US/Eastern DELETION ELEC* ELEC6A 4 Delete Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:56:35.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 11 CORRECT 3 "0=v0^2+2*a_y*d" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= 0 (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:56:35.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 2 CORRECT 3 "0=v0^2+2*a_y*d" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= 0 (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:56:35.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 2 CORRECT 3 "0=v0^2+2*a_y*d" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= 0 (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:56:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 15 HINT It is good practice to identify the fundamental vector principles you are using by writing them purely symbolically in component form before combining them with other equations or given values. Select "Review Physics Equations" on the Help menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:56:42.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 16 HINT A good solution would include the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y, written as a separate equation. 3 3 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:57:04.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 17 HINT 2 What equation do you wish to write? 1 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:57:19.0 US/Eastern HINT_REQUEST Choose-Equation HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 18 HINT charge-force-efield-mag Equations of that type appear within the problem solution. You should write the equation in the form F = abs(q)*E using your own variables. If you do not want to write this equation and are not sure what to do, why don't you call Light-Bulb-Help. 2 2 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST 19 S0708 S0708-Feb09-14-24-45 2007-02-09 15:57:25.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 19 HINT Why don't you continue with the solution by working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:57:28.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 20 HINT Your goal should be choosing a particular kinematic equation containing the y component of the acceleration of the electron from T0 to T1. 2 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:57:30.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 21 HINT Your goal should be drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 3 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:58:02.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 22 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:58:04.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 23 HINT You should be choosing a particular kinematic equation containing the y component of the acceleration of the electron from T0 to T1. 2 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:58:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 24 HINT Your goal should be drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 3 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:58:07.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 25 HINT Notice that the electron is momentarily at rest at T1. 4 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:58:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 26 HINT When an object is at rest even momentarily, its velocity at that moment is zero. 5 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:58:12.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 27 HINT Because the electron is at rest at T1, use the velocity tool to draw a zero-length velocity vector for it. 6 6 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST 14 S0708 S0708-Feb09-14-24-45 2007-02-09 15:58:31.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 28 INCORRECT Vector-679 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=52 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:58:53.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 29 INCORRECT Vector-679 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=52 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:58:55.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 30 HINT Vector-679 label=vf Are you sure the velocity of the electron is non-zero at T1? 1 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:59:17.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 31 HINT Because the electron is at rest at T1, its velocity at T1 is zero. 2 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:59:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 32 HINT Delete this vector and draw a zero-length velocity vector for the electron at T1 instead. To draw a zero-length vector, select the appropriate vector tool, then click and release immediately instead of dragging out an extended arrow. 3 3 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST 9 S0708 S0708-Feb09-14-24-45 2007-02-09 15:59:19.0 US/Eastern DELETION ELEC* ELEC6A Vector-679 Delete label=vf Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 15:59:43.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 33 CORRECT Vector-680 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0708 S0708-Feb09-14-24-45 2007-02-09 15:59:52.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 12 CORRECT 3 "vf^2=v0^2+2*a_y*d" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:59:52.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 3 CORRECT 3 "vf^2=v0^2+2*a_y*d" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:59:52.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 3 CORRECT 3 "vf^2=v0^2+2*a_y*d" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0708 S0708-Feb09-14-24-45 2007-02-09 15:59:56.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 HINT Why don't you continue with the solution by working on applying Newton's second law to the electron from T0 to T1. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0708 S0708-Feb09-14-24-45 2007-02-09 16:00:51.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 HINT Why don't you continue working on applying Newton's second law to the electron from T0 to T1. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0708 S0708-Feb09-14-24-45 2007-02-09 16:00:53.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 3 HINT A good step would be drawing a free-body diagram for the electron from T0 to T1. 2 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0708 S0708-Feb09-14-24-45 2007-02-09 16:00:57.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 4 HINT Your goal should be drawing all the forces acting on the electron from T0 to T1. 3 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0708 S0708-Feb09-14-24-45 2007-02-09 16:00:59.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 5 HINT Notice that the electron is near the earth. 4 Joint Explanation Experimental DRAW-WEIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 16:01:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 6 CORRECT 2 "Eearth*abs(qe)=F" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 21 (= (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON)) Fe_ELECTRON_UNSPECIFIED_12) S0708 S0708-Feb09-14-24-45 2007-02-09 16:01:36.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 13 INCORRECT 4 "m*a=F" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (* m_ELECTRON a_ELECTRON_12) Fe_ELECTRON_UNSPECIFIED_12) S0708 S0708-Feb09-14-24-45 2007-02-09 16:01:42.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 14 HINT 4 What equation do you wish to write? 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0708 S0708-Feb09-14-24-45 2007-02-09 16:01:54.0 US/Eastern HINT_REQUEST Choose-Equation HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 15 HINT (nsl ((?axis . y))) Equations of that type appear within the problem solution. You should write the equation in the form F1_y + F2_y + ... = m*a_y using your own variables. If you do not want to write this equation and are not sure what to do, why don't you call Light-Bulb-Help. 2 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS 16 S0708 S0708-Feb09-14-24-45 2007-02-09 16:01:54.0 US/Eastern DELETION ELEC* ELEC6A 4 Delete Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 16:02:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 16 CORRECT 3 "vf^2=v0^2+2*a_y*d" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0708 S0708-Feb09-14-24-45 2007-02-09 16:02:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 4 CORRECT 3 "vf^2=v0^2+2*a_y*d" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0708 S0708-Feb09-14-24-45 2007-02-09 16:02:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 4 CORRECT 3 "vf^2=v0^2+2*a_y*d" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0708 S0708-Feb09-14-24-45 2007-02-09 16:02:29.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 INCORRECT 4 "a=F/m" Joint Explanation Experimental DRAW-WEIGHT (= a_ELECTRON_12 (/ Fe_ELECTRON_UNSPECIFIED_12 m_ELECTRON)) S0708 S0708-Feb09-14-24-45 2007-02-09 16:02:32.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 2 4 "" Joint Explanation Experimental DRAW-WEIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 16:02:32.0 US/Eastern DELETION ELEC* ELEC6A 4 Delete Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 16:02:34.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 3 HINT Why don't you continue working on applying Newton's second law to the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-WEIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 16:02:37.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 4 HINT Your goal should be drawing a free-body diagram for the electron from T0 to T1. 2 Joint Explanation Experimental DRAW-WEIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 16:02:38.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 5 HINT Try drawing all the forces acting on the electron from T0 to T1. 3 Joint Explanation Experimental DRAW-WEIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 16:02:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 6 HINT Notice that the electron is near the earth. 4 Joint Explanation Experimental DRAW-WEIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 16:02:42.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 7 HINT When an object is near a planet, the planet exerts a weight force on the object. 5 Joint Explanation Experimental DRAW-WEIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 16:03:19.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 8 CORRECT Vector-681 label="Fweight";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=74 Joint Explanation Experimental DRAW-WEIGHT S0708 S0708-Feb09-14-24-45 2007-02-09 16:03:34.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 CORRECT 4 "Fweight=m*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH)) S0708 S0708-Feb09-14-24-45 2007-02-09 16:03:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 1 INCORRECT 5 "m*a=F+Fweight" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (* m_ELECTRON a_ELECTRON_12) (+ Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0708 S0708-Feb09-14-24-45 2007-02-09 16:03:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 2 INCORRECT 5 "m*a=F-Fweight" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (* m_ELECTRON a_ELECTRON_12) (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0708 S0708-Feb09-14-24-45 2007-02-09 16:03:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 3 INCORRECT 5 "m*a=F-Fweight" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (* m_ELECTRON a_ELECTRON_12) (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0708 S0708-Feb09-14-24-45 2007-02-09 16:03:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 4 INCORRECT 5 "m*a=F-Fweight" Joint Explanation Experimental WRITE-NSL-COMPO (= (* m_ELECTRON a_ELECTRON_12) (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0708 S0708-Feb09-14-24-45 2007-02-09 16:04:49.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 5 HINT 5 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0708 S0708-Feb09-14-24-45 2007-02-09 16:04:55.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 6 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS 11 S0708 S0708-Feb09-14-24-45 2007-02-09 16:05:03.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 7 CORRECT 5 "m*a_y=F-Fweight" Although equation 6 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 17 (= (* m_ELECTRON Yc_a_ELECTRON_12_0) (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0708 S0708-Feb09-14-24-45 2007-02-09 16:05:03.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 1 CORRECT 5 "m*a_y=F-Fweight" Although equation 6 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 17 (= (* m_ELECTRON Yc_a_ELECTRON_12_0) (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0708 S0708-Feb09-14-24-45 2007-02-09 16:05:03.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 1 CORRECT 5 "m*a_y=F-Fweight" Although equation 6 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-NSL-COMPO 17 (= (* m_ELECTRON Yc_a_ELECTRON_12_0) (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0708 S0708-Feb09-14-24-45 2007-02-09 16:05:22.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 1 CORRECT 6 "d" Joint Explanation Experimental S0708 S0708-Feb09-14-24-45 2007-02-09 16:05:31.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC6A Answer-1 1 CORRECT Answer-1 "1.016 m" Joint Explanation Experimental 42 S0709 S0709-Feb13-15-03-55 2007-02-13 15:11:52.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 1 CORRECT System-1 label="q";body=particle;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0709 S0709-Feb13-15-03-55 2007-02-13 15:12:30.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 1 CORRECT Axes-2 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 25 S0709 S0709-Feb13-15-03-55 2007-02-13 15:13:15.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 CORRECT Vector-3 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=206 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0709 S0709-Feb13-15-03-55 2007-02-13 15:13:42.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 0 "E=14.3e+3 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 32 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0709 S0709-Feb13-15-03-55 2007-02-13 15:15:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 INCORRECT 1 "q=-7.9e-6 C" Undefined variable: q 1 Joint Explanation Experimental DEFINE-CHARGE S0709 S0709-Feb13-15-03-55 2007-02-13 15:15:36.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 HINT Var-5 label=q Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Joint Explanation Experimental DEFINE-CHARGE S0709 S0709-Feb13-15-03-55 2007-02-13 15:17:25.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 3 CORRECT Var-4 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Joint Explanation Experimental DEFINE-CHARGE 39 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0709 S0709-Feb13-15-03-55 2007-02-13 15:17:41.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 INCORRECT 1 "F=q*E" Undefined variable: F 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0709 S0709-Feb13-15-03-55 2007-02-13 15:19:23.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 CORRECT Vector-5 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=118 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0709 S0709-Feb13-15-03-55 2007-02-13 15:19:29.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 INCORRECT 1 "F=q*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 38 (= Fe_PARTICLE_UNSPECIFIED_1 (* Q_PARTICLE E_REGION_UNSPECIFIED)) S0709 S0709-Feb13-15-03-55 2007-02-13 15:20:10.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 2 CORRECT 1 "F=abs(q)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 73 (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED)) S0709 S0709-Feb13-15-03-55 2007-02-13 15:20:28.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 2 "F" Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 15:20:48.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 ".113 N" Joint Explanation Experimental 98 S0709 S0709-Feb13-15-03-55 2007-02-13 15:32:29.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0709 S0709-Feb13-15-03-55 2007-02-13 15:32:54.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-668 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 22 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0709 S0709-Feb13-15-03-55 2007-02-13 15:33:13.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-669 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 30 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0709 S0709-Feb13-15-03-55 2007-02-13 15:33:13.0 US/Eastern DELETION ELEC* ELEC1C Axes-670 Delete label=NIL Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 15:34:46.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-671 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-COMPO-FORM-AXES 40 S0709 S0709-Feb13-15-03-55 2007-02-13 15:36:15.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 CORRECT Vector-672 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=121 Joint Explanation Experimental DRAW-WEIGHT S0709 S0709-Feb13-15-03-55 2007-02-13 15:37:20.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 CORRECT 0 "Fg=me*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0709 S0709-Feb13-15-03-55 2007-02-13 15:38:30.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-673 label="FE";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=105 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0709 S0709-Feb13-15-03-55 2007-02-13 15:39:08.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT 1 "FE=abs(q)*E" Undefined variables: (q E) 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 39 S0709 S0709-Feb13-15-03-55 2007-02-13 15:39:47.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 CORRECT Vector-674 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=103 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0709 S0709-Feb13-15-03-55 2007-02-13 15:39:54.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 INCORRECT 1 "FE=abs(q)*E" Undefined variable: q 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0709 S0709-Feb13-15-03-55 2007-02-13 15:40:05.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 CORRECT 1 "FE=abs(qe)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 74 (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0709 S0709-Feb13-15-03-55 2007-02-13 15:40:14.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 INCORRECT 2 "E" Unable to solve for E. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 15:41:12.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 CORRECT 2 "FE=abs(Fg)" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Fe_ELECTRON_UNSPECIFIED_1 (ABS Fw_ELECTRON_EARTH_1)) S0709 S0709-Feb13-15-03-55 2007-02-13 15:41:12.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 2 "FE=abs(Fg)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 (ABS Fw_ELECTRON_EARTH_1)) S0709 S0709-Feb13-15-03-55 2007-02-13 15:41:12.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 2 "FE=abs(Fg)" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fe_ELECTRON_UNSPECIFIED_1 (ABS Fw_ELECTRON_EARTH_1)) S0709 S0709-Feb13-15-03-55 2007-02-13 15:41:12.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 2 "FE=abs(Fg)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 (ABS Fw_ELECTRON_EARTH_1)) S0709 S0709-Feb13-15-03-55 2007-02-13 15:41:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 3 CORRECT 1 "FE=abs(qe)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0709 S0709-Feb13-15-03-55 2007-02-13 15:41:21.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 2 CORRECT 3 "E" Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 15:41:34.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 CORRECT Answer-1 "5.58e-11 N/C" Joint Explanation Experimental 99 S0709 S0709-Feb13-15-03-55 2007-02-13 15:55:10.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-1 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=66 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 5 S0709 S0709-Feb13-15-03-55 2007-02-13 15:55:25.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 CORRECT System-2 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0709 S0709-Feb13-15-03-55 2007-02-13 15:55:46.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-3 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 19 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0709 S0709-Feb13-15-03-55 2007-02-13 15:56:02.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-4 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 22 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0709 S0709-Feb13-15-03-55 2007-02-13 15:56:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 0 "E=2.00e+4 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 26 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0709 S0709-Feb13-15-03-55 2007-02-13 15:57:43.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-5 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value=".015 m" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 25 S0709 S0709-Feb13-15-03-55 2007-02-13 15:57:47.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Var-5 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0709 S0709-Feb13-15-03-55 2007-02-13 15:57:47.0 US/Eastern DELETION ELEC* ELEC3A Var-5 Delete label=s Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 16:00:38.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-6 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=54 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP 26 S0709 S0709-Feb13-15-03-55 2007-02-13 16:00:38.0 US/Eastern DELETION ELEC* ELEC3A Axes-7 Delete label=NIL Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 16:01:02.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 1 CORRECT Axes-8 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 36 S0709 S0709-Feb13-15-03-55 2007-02-13 16:03:07.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-9 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=57 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0709 S0709-Feb13-15-03-55 2007-02-13 16:03:34.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 CORRECT 1 "F=abs(qe)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 47 (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:04:23.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 INCORRECT Var-10 label="v0";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T0;value="0 m/s" Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0709 S0709-Feb13-15-03-55 2007-02-13 16:04:38.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 HINT Var-10 label=v0 On this problem, you should use velocity instead of speed. 1 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0709 S0709-Feb13-15-03-55 2007-02-13 16:05:50.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 INCORRECT Vector-11 label="vo";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=40 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0709 S0709-Feb13-15-03-55 2007-02-13 16:06:02.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Vector-11 label=vo You don't need to draw the velocity at T0. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0709 S0709-Feb13-15-03-55 2007-02-13 16:06:35.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0709 S0709-Feb13-15-03-55 2007-02-13 16:06:35.0 US/Eastern DELETION ELEC* ELEC3A Var-10 Delete label=v0 Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 16:06:35.0 US/Eastern DELETION ELEC* ELEC3A Vector-11 Delete label=vo Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 16:08:25.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 CORRECT Vector-12 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=64 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0709 S0709-Feb13-15-03-55 2007-02-13 16:08:36.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 2 "d=.015m" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 51 (= s_ELECTRON_12 (DNUM 0.015 m)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:09:18.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 3 CORRECT Vector-13 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=64 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0709 S0709-Feb13-15-03-55 2007-02-13 16:10:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 3 "F=me*a" Joint Explanation Experimental (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:11:53.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 2 INCORRECT 4 "a=vf/(T1-T0)" Undefined variables: (T1 T0) 1 Joint Explanation Experimental 50 S0709 S0709-Feb13-15-03-55 2007-02-13 16:15:17.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 3 TRUE_BUT_IRRELEVANT 4 "vf^2=2*a*d" Joint Explanation Experimental 51 (= (^ v_ELECTRON_2 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:15:31.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 CORRECT 5 "vf" Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 16:15:42.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.03e+7 m/s" Joint Explanation Experimental 76 S0709 S0709-Feb13-15-03-55 2007-02-13 16:29:37.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0709 S0709-Feb13-15-03-55 2007-02-13 16:29:58.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-668 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 19 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0709 S0709-Feb13-15-03-55 2007-02-13 16:30:14.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-669 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 22 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:30:21.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-670 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 32 S0709 S0709-Feb13-15-03-55 2007-02-13 16:30:53.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=70 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0709 S0709-Feb13-15-03-55 2007-02-13 16:31:05.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 0 "E=4.00e-12 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 36 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:32:16.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-672 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=87 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0709 S0709-Feb13-15-03-55 2007-02-13 16:32:37.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-673 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=83 Joint Explanation Experimental DRAW-WEIGHT S0709 S0709-Feb13-15-03-55 2007-02-13 16:32:56.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 CORRECT 1 "Fg=me*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:33:16.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 2 "Fe=abs(qe)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 48 (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:34:25.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-674 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=47 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0709 S0709-Feb13-15-03-55 2007-02-13 16:34:38.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 3 "vi=4.30 m/s" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 52 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:35:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-675 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0709 S0709-Feb13-15-03-55 2007-02-13 16:35:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 1 CORRECT 4 "vf=0 m/s" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:35:57.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-676 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 51 S0709 S0709-Feb13-15-03-55 2007-02-13 16:36:02.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Var-676 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0709 S0709-Feb13-15-03-55 2007-02-13 16:36:48.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT Var-676 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T1;value="" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0709 S0709-Feb13-15-03-55 2007-02-13 16:36:48.0 US/Eastern DELETION ELEC* ELEC6A Var-676 Delete label=s Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 16:40:46.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-677 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=45 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN S0709 S0709-Feb13-15-03-55 2007-02-13 16:41:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 1 INCORRECT 5 "me*a=Fe-Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (* m_ELECTRON a_ELECTRON_12) (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:41:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 1 INCORRECT 5 "me*a=Fe-Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (* m_ELECTRON a_ELECTRON_12) (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:41:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 1 INCORRECT 5 "me*a=Fe-Fg" Joint Explanation Experimental WRITE-NSL-COMPO (= (* m_ELECTRON a_ELECTRON_12) (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:41:25.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 HINT 5 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental DRAW-NET-FORCE-FROM-ACCEL S0709 S0709-Feb13-15-03-55 2007-02-13 16:42:06.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 INCORRECT 5 "me*abs(a)=Fe-Fg" Joint Explanation Experimental DRAW-NET-FORCE-FROM-ACCEL (= (* m_ELECTRON (ABS a_ELECTRON_12)) (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:42:12.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 3 HINT 5 What equation do you wish to write? 1 Joint Explanation Experimental DRAW-NET-FORCE-FROM-ACCEL S0709 S0709-Feb13-15-03-55 2007-02-13 16:42:41.0 US/Eastern CANCEL ELEC* ELEC6A Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 16:43:03.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 4 CORRECT Vector-678 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=270;mag=69 Joint Explanation Experimental DRAW-NET-FORCE-FROM-ACCEL S0709 S0709-Feb13-15-03-55 2007-02-13 16:43:16.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 1 TRUE_BUT_IRRELEVANT 5 "F=Fg-Fe" Joint Explanation Experimental (= Fnet_ELECTRON_12 (- Fw_ELECTRON_EARTH_12 Fe_ELECTRON_UNSPECIFIED_12)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:43:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 2 TRUE_BUT_IRRELEVANT 6 "F=me*a" Joint Explanation Experimental (= Fnet_ELECTRON_12 (* m_ELECTRON a_ELECTRON_12)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:45:10.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 CORRECT Vector-679 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=53 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0709 S0709-Feb13-15-03-55 2007-02-13 16:45:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 INCORRECT 7 "vf^2=vi^2+2*a*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0709 S0709-Feb13-15-03-55 2007-02-13 16:45:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 INCORRECT 7 "vf^2=vi^2+2*a*d" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0709 S0709-Feb13-15-03-55 2007-02-13 16:45:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 INCORRECT 7 "vf^2=vi^2+2*a*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0709 S0709-Feb13-15-03-55 2007-02-13 16:45:19.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 2 HINT 7 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0709 S0709-Feb13-15-03-55 2007-02-13 16:45:35.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 3 INCORRECT 7 "vf^2=vi^2+2*abs(a)*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS 50 (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 (ABS a_ELECTRON_12)) s_ELECTRON_12))) S0709 S0709-Feb13-15-03-55 2007-02-13 16:45:52.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 4 INCORRECT 7 "vf^2=vi^2+2*abs(a)*abs(d)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 (ABS a_ELECTRON_12)) (ABS s_ELECTRON_12)))) S0709 S0709-Feb13-15-03-55 2007-02-13 16:45:56.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 5 HINT 7 What equation do you wish to write? 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0709 S0709-Feb13-15-03-55 2007-02-13 16:46:35.0 US/Eastern HINT_REQUEST Choose-Equation HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 6 HINT (projection ((?axis . y) (?vector displacement ?body))) I'm afraid that the equation type that you selected does not appear in any of the solutions to this problem. Why don't you try something different or go to Light-Bulb-Help if you do not know what to do. 2 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS 45 S0709 S0709-Feb13-15-03-55 2007-02-13 16:46:49.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 7 INCORRECT 8 "d=dy" Undefined variable: dy 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0709 S0709-Feb13-15-03-55 2007-02-13 16:47:02.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 8 CORRECT 8 "d=d_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= s_ELECTRON_12 Yc_s_ELECTRON_12_0) S0709 S0709-Feb13-15-03-55 2007-02-13 16:48:20.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 2 HINT 3 Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0709 S0709-Feb13-15-03-55 2007-02-13 16:48:37.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 3 HINT #.(wb-quant '(define-variable "d" |NIL| |displacement| |electron| |T1| |NIL| NIL "") 'mag) That quantity is not mentioned in the Andes solution. 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0709 S0709-Feb13-15-03-55 2007-02-13 16:48:41.0 US/Eastern CANCEL ELEC* ELEC6A Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 16:48:48.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 4 INCORRECT 7 "vf^2=vi^2+2*(a)*(d)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0709 S0709-Feb13-15-03-55 2007-02-13 16:48:48.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 2 INCORRECT 7 "vf^2=vi^2+2*(a)*(d)" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0709 S0709-Feb13-15-03-55 2007-02-13 16:48:48.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 9 INCORRECT 7 "vf^2=vi^2+2*(a)*(d)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0709 S0709-Feb13-15-03-55 2007-02-13 16:48:53.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 1 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental COMPO-ZERO-VECTOR S0709 S0709-Feb13-15-03-55 2007-02-13 16:49:08.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 2 HINT #.(wb-quant '(define-variable "d" |NIL| |displacement| |electron| |T0 to T1| |NIL| NIL "") 'mag) Right. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Joint Explanation Experimental COMPO-ZERO-VECTOR S0709 S0709-Feb13-15-03-55 2007-02-13 16:49:38.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 3 HINT (lk-no-t ((?axis . y))) Right indeed. A good step would be writing a constant acceleration equation in terms of vector components along the Y axis. 3 Joint Explanation Experimental COMPO-ZERO-VECTOR S0709 S0709-Feb13-15-03-55 2007-02-13 16:49:58.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 4 INCORRECT 9 "a=a_y" Joint Explanation Experimental COMPO-ZERO-VECTOR (= a_ELECTRON_12 Yc_a_ELECTRON_12_0) S0709 S0709-Feb13-15-03-55 2007-02-13 16:50:01.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 5 HINT 9 What equation do you wish to write? 1 Joint Explanation Experimental COMPO-ZERO-VECTOR S0709 S0709-Feb13-15-03-55 2007-02-13 16:50:04.0 US/Eastern CANCEL ELEC* ELEC6A Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 16:51:01.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 6 CORRECT 9 "vf=vf_y" Joint Explanation Experimental COMPO-ZERO-VECTOR (= v_ELECTRON_2 Yc_v_ELECTRON_2_0) S0709 S0709-Feb13-15-03-55 2007-02-13 16:51:01.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 2 CORRECT 9 "vf=vf_y" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= v_ELECTRON_2 Yc_v_ELECTRON_2_0) S0709 S0709-Feb13-15-03-55 2007-02-13 16:51:10.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 5 CORRECT 10 "vi=vi_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= v_ELECTRON_1 Yc_v_ELECTRON_1_0) S0709 S0709-Feb13-15-03-55 2007-02-13 16:51:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 6 INCORRECT 11 "a=a_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= a_ELECTRON_12 Yc_a_ELECTRON_12_0) S0709 S0709-Feb13-15-03-55 2007-02-13 16:51:45.0 US/Eastern DELETION ELEC* ELEC6A 11 Delete Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 16:54:39.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 7 HINT 7 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0709 S0709-Feb13-15-03-55 2007-02-13 16:54:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 8 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS 40 S0709 S0709-Feb13-15-03-55 2007-02-13 16:54:54.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 9 CORRECT 7 "vf^2=vi^2+2*(a_y)*(d)" Although equation 8 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 47 (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0709 S0709-Feb13-15-03-55 2007-02-13 16:54:54.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 3 CORRECT 7 "vf^2=vi^2+2*(a_y)*(d)" Although equation 8 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO 47 (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0709 S0709-Feb13-15-03-55 2007-02-13 16:54:54.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 10 CORRECT 7 "vf^2=vi^2+2*(a_y)*(d)" Although equation 8 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 47 (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0709 S0709-Feb13-15-03-55 2007-02-13 16:56:06.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 1 INCORRECT 11 "d" Unable to solve for d. Try the light-bulb if you need a hint about a step that still needs to be done. 1 Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 16:56:12.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A No Intepretation 3 HINT 10 Why don't you continue with the solution by working on applying Newton's second law to the electron from T0 to T1. 1 Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 16:56:54.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 4 TRUE_BUT_IRRELEVANT 11 "me*a=Fg-Fe" Joint Explanation Experimental (= (* m_ELECTRON a_ELECTRON_12) (- Fw_ELECTRON_EARTH_12 Fe_ELECTRON_UNSPECIFIED_12)) S0709 S0709-Feb13-15-03-55 2007-02-13 16:57:42.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 2 INCORRECT 12 "Fg=Fg_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_12 Yc_Fw_ELECTRON_EARTH_12_0) S0709 S0709-Feb13-15-03-55 2007-02-13 16:57:57.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 2 INCORRECT 12 "d" Unable to solve for d. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0709 S0709-Feb13-15-03-55 2007-02-13 16:57:57.0 US/Eastern DELETION ELEC* ELEC6A 12 Delete Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 10:15:40.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 1 CORRECT System-1 label="p";body=particle;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0710 S0710-Feb14-10-06-09 2007-02-14 10:16:39.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 CORRECT Vector-2 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=298 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0710 S0710-Feb14-10-06-09 2007-02-14 10:16:39.0 US/Eastern DELETION FOR* FOR4C Axes-3 Delete label=NIL Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 10:18:19.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 1 CORRECT Axes-4 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 25 S0710 S0710-Feb14-10-06-09 2007-02-14 10:18:19.0 US/Eastern DELETION FOR* FOR4C 1 Delete Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 10:18:19.0 US/Eastern DELETION FOR* FOR4C 0 Delete Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 10:18:19.0 US/Eastern DELETION FOR* FOR4C Vector-5 Delete label=NIL Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 10:20:57.0 US/Eastern ATTEMPT Variable RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 INCORRECT Var-6 label="p";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9x10^-6" Syntax error in p=-7.9x10^-6 1 Joint Explanation Experimental DEFINE-CHARGE 22 ? S0710 S0710-Feb14-10-06-09 2007-02-14 10:21:24.0 US/Eastern ATTEMPT Variable RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 INCORRECT Var-6 label="p";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6" Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE (= Q_PARTICLE (- 7.900000000000001e-6)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:21:38.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 3 CORRECT Var-6 label="p";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6C" Joint Explanation Experimental DEFINE-CHARGE 30 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:21:52.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 1 INCORRECT 0 "Fx=p*E_x" Undefined variable: Fx 1 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES S0710 S0710-Feb14-10-06-09 2007-02-14 10:22:47.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 2 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=particle;forcetype=Electric;time=T0;dir=22;mag=302 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES S0710 S0710-Feb14-10-06-09 2007-02-14 10:22:58.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 3 HINT Vector-7 label=F A force arise from the interaction of two DIFFERENT objects, but you have used the particle for both. 1 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES S0710 S0710-Feb14-10-06-09 2007-02-14 10:23:07.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 4 HINT If you were trying to draw the net force on the particle, then double click on this force and look carefully at the dialog box. There is a button for defining the net force. 2 2 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES 25 S0710 S0710-Feb14-10-06-09 2007-02-14 10:23:25.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 5 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=22;mag=302 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES 24 S0710 S0710-Feb14-10-06-09 2007-02-14 10:23:30.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 6 HINT Vector-7 label=F Do you really want the direction of that vector to be 22 degrees? 1 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES S0710 S0710-Feb14-10-06-09 2007-02-14 10:23:30.0 US/Eastern DELETION FOR* FOR4C Vector-7 Delete label=F Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 10:24:10.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 7 CORRECT Vector-8 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=202;mag=299 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES 25 S0710 S0710-Feb14-10-06-09 2007-02-14 10:24:13.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 1 INCORRECT 0 "F=p*E_x" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 24 (= Fnet_PARTICLE_1 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:24:13.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 2 INCORRECT 0 "F=p*E_x" Joint Explanation Experimental WRITE-NET-FORCE-COMPO 24 (= Fnet_PARTICLE_1 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:24:16.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 3 HINT 0 You used F, which is the MAGNITUDE of the net force on the particle at T0. Is that what you intended? 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO S0710 S0710-Feb14-10-06-09 2007-02-14 10:24:30.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 4 CORRECT 0 "F_x=p*E_x" Although equation 1 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 45 (= Xc_Fnet_PARTICLE_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:24:30.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= (+ Xc_Fe_PARTICLE_UNSPECIFIED_1_0) Xc_Fnet_PARTICLE_1_0)) 1 CORRECT 0 "F_x=p*E_x" Although equation 1 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-NET-FORCE-COMPO 45 (= Xc_Fnet_PARTICLE_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:24:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= Yc_Fnet_PARTICLE_1_0 (* Fnet_PARTICLE_1 (SIN (- (DNUM 202 deg) (DNUM 0 deg)))))) 1 HINT It is good practice to identify the fundamental vector principles you are using by writing them purely symbolically in component form before combining them with other equations or given values. Select "Review Physics Equations" on the Help menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental COMPO-GENERAL-CASE S0710 S0710-Feb14-10-06-09 2007-02-14 10:24:39.0 US/Eastern DELETION FOR* FOR4C 0 Delete Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 10:25:47.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fnet_PARTICLE_1_0 (* Fnet_PARTICLE_1 (SIN (- (DNUM 202 deg) (DNUM 0 deg)))))) 2 CORRECT 0 "F=((F_x)^2+(F_y)^2)^.5" Joint Explanation Experimental COMPO-GENERAL-CASE (= Fnet_PARTICLE_1 (^ (+ (^ Xc_Fnet_PARTICLE_1_0 2) (^ Yc_Fnet_PARTICLE_1_0 2)) 0.5)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:25:47.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fnet_PARTICLE_1_0 (* Fnet_PARTICLE_1 (COS (- (DNUM 202 deg) (DNUM 0 deg)))))) 1 CORRECT 0 "F=((F_x)^2+(F_y)^2)^.5" Joint Explanation Experimental COMPO-GENERAL-CASE (= Fnet_PARTICLE_1 (^ (+ (^ Xc_Fnet_PARTICLE_1_0 2) (^ Yc_Fnet_PARTICLE_1_0 2)) 0.5)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:25:48.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 5 CORRECT 1 "F_x=p*E_x" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 45 (= Xc_Fnet_PARTICLE_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:25:48.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= (+ Xc_Fe_PARTICLE_UNSPECIFIED_1_0) Xc_Fnet_PARTICLE_1_0)) 2 CORRECT 1 "F_x=p*E_x" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-NET-FORCE-COMPO 45 (= Xc_Fnet_PARTICLE_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:25:55.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 1 HINT It is good practice to identify the fundamental vector principles you are using by writing them purely symbolically in component form before combining them with other equations or given values. Select "Review Physics Equations" on the Help menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental COMPO-GENERAL-CASE S0710 S0710-Feb14-10-06-09 2007-02-14 10:26:03.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 2 HINT A good solution would include the definition of electric field, written as a separate equation. 3 3 Joint Explanation Experimental COMPO-GENERAL-CASE S0710 S0710-Feb14-10-06-09 2007-02-14 10:26:03.0 US/Eastern DELETION FOR* FOR4C 1 Delete Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 10:26:33.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 3 INCORRECT 1 "E=F/p" Joint Explanation Experimental COMPO-GENERAL-CASE (= E_REGION_UNSPECIFIED (/ Fnet_PARTICLE_1 Q_PARTICLE)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:26:33.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 4 INCORRECT 1 "E=F/p" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= E_REGION_UNSPECIFIED (/ Fnet_PARTICLE_1 Q_PARTICLE)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:26:33.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 5 INCORRECT 1 "E=F/p" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= E_REGION_UNSPECIFIED (/ Fnet_PARTICLE_1 Q_PARTICLE)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:26:33.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 6 INCORRECT 1 "E=F/p" Joint Explanation Experimental COMPO-GENERAL-CASE (= E_REGION_UNSPECIFIED (/ Fnet_PARTICLE_1 Q_PARTICLE)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:26:39.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 7 HINT 1 Check your signs. 1 Joint Explanation Experimental COMPO-GENERAL-CASE S0710 S0710-Feb14-10-06-09 2007-02-14 10:27:07.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 8 HINT 1 Check your signs. 1 Joint Explanation Experimental COMPO-GENERAL-CASE S0710 S0710-Feb14-10-06-09 2007-02-14 10:27:08.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 9 HINT Perhaps the sign of the p term should be changed. 2 2 Joint Explanation Experimental COMPO-GENERAL-CASE 20 S0710 S0710-Feb14-10-06-09 2007-02-14 10:27:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 10 CORRECT 1 "E=F/-p" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-GENERAL-CASE 40 (= E_REGION_UNSPECIFIED (/ Fnet_PARTICLE_1 (- Q_PARTICLE))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:27:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 1 CORRECT 1 "E=F/-p" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 40 (= E_REGION_UNSPECIFIED (/ Fnet_PARTICLE_1 (- Q_PARTICLE))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:27:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= (+ Yc_Fe_PARTICLE_UNSPECIFIED_1_0) Yc_Fnet_PARTICLE_1_0)) 1 CORRECT 1 "E=F/-p" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-NET-FORCE-COMPO 40 (= E_REGION_UNSPECIFIED (/ Fnet_PARTICLE_1 (- Q_PARTICLE))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:27:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_Fnet_PARTICLE_1_0 (* Fnet_PARTICLE_1 (SIN (- (DNUM 202 deg) (DNUM 0 deg)))))) 3 CORRECT 1 "E=F/-p" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-GENERAL-CASE 40 (= E_REGION_UNSPECIFIED (/ Fnet_PARTICLE_1 (- Q_PARTICLE))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:28:15.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 HINT You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the electric field at the region due to an unspecified agent. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN S0710 S0710-Feb14-10-06-09 2007-02-14 10:28:35.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 2 HINT You can find the value of the magnitude of the electric field at the region due to an unspecified agent in the problem statement. 2 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN S0710 S0710-Feb14-10-06-09 2007-02-14 10:28:51.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 3 HINT The value of the magnitude of the electric field at the region due to an unspecified agent is given as 14300.0 N/C. 3 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN S0710 S0710-Feb14-10-06-09 2007-02-14 10:28:59.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 4 HINT Enter the equation E = 14300.0 N/C. 4 4 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 35 S0710 S0710-Feb14-10-06-09 2007-02-14 10:28:59.0 US/Eastern DELETION FOR* FOR4C 2 Delete Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 10:29:30.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 5 CORRECT 2 "E=14300.0 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 42 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:29:39.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 6 CORRECT 3 "F_x=p*E_x" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Xc_Fnet_PARTICLE_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:29:39.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= (+ Xc_Fe_PARTICLE_UNSPECIFIED_1_0) Xc_Fnet_PARTICLE_1_0)) 3 CORRECT 3 "F_x=p*E_x" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Xc_Fnet_PARTICLE_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:30:02.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 2 HINT It is good practice to identify the fundamental vector principles you are using by writing them purely symbolically in component form before combining them with other equations or given values. Select "Review Physics Equations" on the Help menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO S0710 S0710-Feb14-10-06-09 2007-02-14 10:32:42.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 3 CORRECT 4 "F_y=p*E_y" Although equation 5 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 43 (= Yc_Fnet_PARTICLE_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:32:42.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= (+ Yc_Fe_PARTICLE_UNSPECIFIED_1_0) Yc_Fnet_PARTICLE_1_0)) 2 CORRECT 4 "F_y=p*E_y" Although equation 5 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-NET-FORCE-COMPO 43 (= Yc_Fnet_PARTICLE_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:32:42.0 US/Eastern DELETION FOR* FOR4C 1 Delete Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 10:34:06.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 11 CORRECT 1 "F=abs(-p*E)" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-GENERAL-CASE 43 (= Fnet_PARTICLE_1 (ABS (* (- Q_PARTICLE) E_REGION_UNSPECIFIED))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:34:06.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 4 CORRECT 1 "F=abs(-p*E)" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 43 (= Fnet_PARTICLE_1 (ABS (* (- Q_PARTICLE) E_REGION_UNSPECIFIED))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:34:06.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= (+ Yc_Fe_PARTICLE_UNSPECIFIED_1_0) Yc_Fnet_PARTICLE_1_0)) 3 CORRECT 1 "F=abs(-p*E)" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-NET-FORCE-COMPO 43 (= Fnet_PARTICLE_1 (ABS (* (- Q_PARTICLE) E_REGION_UNSPECIFIED))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:34:06.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_Fnet_PARTICLE_1_0 (* Fnet_PARTICLE_1 (SIN (- (DNUM 202 deg) (DNUM 0 deg)))))) 4 CORRECT 1 "F=abs(-p*E)" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-GENERAL-CASE 43 (= Fnet_PARTICLE_1 (ABS (* (- Q_PARTICLE) E_REGION_UNSPECIFIED))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:34:20.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 12 HINT It is good practice to identify the fundamental vector principles you are using by writing them purely symbolically in component form before combining them with other equations or given values. Select "Review Physics Equations" on the Help menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental COMPO-GENERAL-CASE S0710 S0710-Feb14-10-06-09 2007-02-14 10:34:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 13 HINT A good solution would include the definition of electric field, written as a separate equation. 3 3 Joint Explanation Experimental COMPO-GENERAL-CASE S0710 S0710-Feb14-10-06-09 2007-02-14 10:34:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 14 CORRECT 5 "E=F/-p" Although equation 6 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-GENERAL-CASE (= E_REGION_UNSPECIFIED (/ Fnet_PARTICLE_1 (- Q_PARTICLE))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:34:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 5 CORRECT 5 "E=F/-p" Although equation 6 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= E_REGION_UNSPECIFIED (/ Fnet_PARTICLE_1 (- Q_PARTICLE))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:34:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= (+ Yc_Fe_PARTICLE_UNSPECIFIED_1_0) Yc_Fnet_PARTICLE_1_0)) 4 CORRECT 5 "E=F/-p" Although equation 6 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= E_REGION_UNSPECIFIED (/ Fnet_PARTICLE_1 (- Q_PARTICLE))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:34:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_Fnet_PARTICLE_1_0 (* Fnet_PARTICLE_1 (SIN (- (DNUM 202 deg) (DNUM 0 deg)))))) 5 CORRECT 5 "E=F/-p" Although equation 6 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-GENERAL-CASE (= E_REGION_UNSPECIFIED (/ Fnet_PARTICLE_1 (- Q_PARTICLE))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:35:36.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 1 CORRECT 6 "E_x=E*cos($qE)" Joint Explanation Experimental COMPO-GENERAL-CASE (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS OE_REGION_UNSPECIFIED))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:35:36.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (IMPLICIT-EQN (= OE_REGION_UNSPECIFIED (DNUM 22 deg))) 1 CORRECT 6 "E_x=E*cos($qE)" Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS OE_REGION_UNSPECIFIED))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:35:56.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 15 CORRECT 7 "E_y=E*sin($qE)" Joint Explanation Experimental COMPO-GENERAL-CASE (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN OE_REGION_UNSPECIFIED))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:35:56.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (IMPLICIT-EQN (= OE_REGION_UNSPECIFIED (DNUM 22 deg))) 2 CORRECT 7 "E_y=E*sin($qE)" Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN OE_REGION_UNSPECIFIED))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:36:14.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 8 "F" Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 10:36:28.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 "0.11297N" Joint Explanation Experimental 68 S0710 S0710-Feb14-10-06-09 2007-02-14 10:44:09.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-667 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-COMPO-FORM-AXES 15 S0710 S0710-Feb14-10-06-09 2007-02-14 10:44:09.0 US/Eastern DELETION ELEC* ELEC1C System-668 Delete label=NIL Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 10:44:42.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-669 label="p";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 25 S0710 S0710-Feb14-10-06-09 2007-02-14 10:45:21.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 2 INCORRECT System-670 label="z";body=earth;time=NIL Joint Explanation Experimental DRAW-BODY 23 S0710 S0710-Feb14-10-06-09 2007-02-14 10:46:08.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT Var-671 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19" Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE 22 (= Q_ELECTRON (- 1.5999999999999998e-19)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:46:08.0 US/Eastern DELETION ELEC* ELEC1C Var-672 Delete label=NIL Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 10:46:27.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-671 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 31 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:46:53.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-673 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 38 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:46:59.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 3 CORRECT Var-671 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 39 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:48:56.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 CORRECT Vector-674 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=61 Joint Explanation Experimental DRAW-WEIGHT S0710 S0710-Feb14-10-06-09 2007-02-14 10:49:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-675 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=51 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0710 S0710-Feb14-10-06-09 2007-02-14 10:50:15.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 CORRECT 0 "Fg=me*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:50:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 CORRECT 1 "Fe=Fg" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0710 S0710-Feb14-10-06-09 2007-02-14 10:50:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 1 "Fe=Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0710 S0710-Feb14-10-06-09 2007-02-14 10:50:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 1 "Fe=Fg" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0710 S0710-Feb14-10-06-09 2007-02-14 10:50:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 1 "Fe=Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0710 S0710-Feb14-10-06-09 2007-02-14 10:51:10.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-676 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=66 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0710 S0710-Feb14-10-06-09 2007-02-14 10:51:38.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 INCORRECT 2 "E=Fe/qe" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= E_REGION_UNSPECIFIED (/ Fe_ELECTRON_UNSPECIFIED_1 Q_ELECTRON)) S0710 S0710-Feb14-10-06-09 2007-02-14 10:52:15.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 HINT 2 Normally, this equation is written using an absolute value. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0710 S0710-Feb14-10-06-09 2007-02-14 10:52:29.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 3 CORRECT 2 "E=Fe/abs(qe)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 74 (= E_REGION_UNSPECIFIED (/ Fe_ELECTRON_UNSPECIFIED_1 (ABS Q_ELECTRON))) S0710 S0710-Feb14-10-06-09 2007-02-14 10:52:46.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 CORRECT 3 "E" Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 10:53:09.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 CORRECT Answer-1 "5.58e-11 N/C" Joint Explanation Experimental 99 S0710 S0710-Feb14-10-06-09 2007-02-14 11:02:46.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 1 CORRECT Axes-1 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 15 S0710 S0710-Feb14-10-06-09 2007-02-14 11:03:06.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 CORRECT System-2 label="p";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 25 S0710 S0710-Feb14-10-06-09 2007-02-14 11:03:49.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 2 INCORRECT System-3 label="L";body=plates;time=NIL Joint Explanation Experimental DRAW-BODY 23 S0710 S0710-Feb14-10-06-09 2007-02-14 11:03:49.0 US/Eastern DELETION ELEC* ELEC3A System-4 Delete label=NIL Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 11:04:51.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-5 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=106 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 24 S0710 S0710-Feb14-10-06-09 2007-02-14 11:05:36.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-6 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=105 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0710 S0710-Feb14-10-06-09 2007-02-14 11:05:44.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-6 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=73 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0710 S0710-Feb14-10-06-09 2007-02-14 11:06:20.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-7 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=73 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0710 S0710-Feb14-10-06-09 2007-02-14 11:07:13.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-8 label="qp";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 28 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:07:43.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-9 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="0.015m" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0710 S0710-Feb14-10-06-09 2007-02-14 11:07:54.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Var-9 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0710 S0710-Feb14-10-06-09 2007-02-14 11:08:03.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 2 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0710 S0710-Feb14-10-06-09 2007-02-14 11:08:03.0 US/Eastern DELETION ELEC* ELEC3A Var-10 Delete label=NIL Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 11:09:10.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Var-9 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0710 S0710-Feb14-10-06-09 2007-02-14 11:09:12.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 2 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0710 S0710-Feb14-10-06-09 2007-02-14 11:09:14.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT You should draw the displacement of the electron from T0 to T1. You can click on the light bulb button or 'explain further' for suggestions about how to solve the problem using it. 3 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0710 S0710-Feb14-10-06-09 2007-02-14 11:09:44.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 CORRECT Vector-11 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=70 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0710 S0710-Feb14-10-06-09 2007-02-14 11:09:44.0 US/Eastern DELETION ELEC* ELEC3A Var-9 Delete label=s Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 11:09:58.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 0 "d=0.015m" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 32 (= s_ELECTRON_12 (DNUM 0.015 m)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:10:40.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-12 label="mp";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 35 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:11:34.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 CORRECT 1 "F=E*abs(qp)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 47 (= Fe_ELECTRON_PLATES_12 (* E_REGION_PLATES (ABS Q_ELECTRON))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:11:48.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 2 "F=mp*a" Joint Explanation Experimental (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:13:25.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 INCORRECT Vector-13 label="v0";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=76 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0710 S0710-Feb14-10-06-09 2007-02-14 11:13:32.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 2 CORRECT Vector-13 label="v0";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0710 S0710-Feb14-10-06-09 2007-02-14 11:13:51.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 INCORRECT Vector-14 label="v1";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0710 S0710-Feb14-10-06-09 2007-02-14 11:14:06.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 INCORRECT Vector-14 label="v1";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0710 S0710-Feb14-10-06-09 2007-02-14 11:14:06.0 US/Eastern DELETION ELEC* ELEC3A Vector-14 Delete label=v1 Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 11:14:23.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 3 CORRECT Vector-15 label="v1";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=74 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0710 S0710-Feb14-10-06-09 2007-02-14 11:15:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 2 TRUE_BUT_IRRELEVANT 3 "a=F/mp" Joint Explanation Experimental (= a_ELECTRON_12 (/ Fe_ELECTRON_PLATES_12 m_ELECTRON)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:16:17.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 1 INCORRECT 4 "v1^2=v0^2+2ad" Syntax error in v1^2=v0^2+2ad 1 Joint Explanation Experimental WRITE-IMPLICIT-EQN 46 ? S0710 S0710-Feb14-10-06-09 2007-02-14 11:16:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 2 HINT The equation or the units in it are not in a recognizable form. 2 Joint Explanation Experimental WRITE-IMPLICIT-EQN S0710 S0710-Feb14-10-06-09 2007-02-14 11:17:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 3 CORRECT 4 "v0=0 m/s" Joint Explanation Experimental WRITE-IMPLICIT-EQN 47 (= v_ELECTRON_1 (DNUM 0 m/s)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:18:00.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 3 INCORRECT 5 "v1^2=v0^2+2ad" Syntax error in v1^2=v0^2+2ad 1 Joint Explanation Experimental 46 ? S0710 S0710-Feb14-10-06-09 2007-02-14 11:18:03.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A No Intepretation 4 HINT The equation or the units in it are not in a recognizable form. 2 Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 11:18:06.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A No Intepretation 5 HINT Though I can't tell exactly what the mistake is, a few common sources of errors are: (a) Unit symbols are case sensitive. (b) Multiplication always requires an explicit multiplication sign: W=m*g, NOT W=mg. (c) Units attach only to numbers, not to variables or expressions. 3 3 Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 11:18:23.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 6 TRUE_BUT_IRRELEVANT 5 "v1^2=v0^2+2*a*d" Joint Explanation Experimental (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:18:31.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 INCORRECT 6 "v1" Unable to solve for v1. One thing you probably need is an equation specifying the given value of E. 1 1 Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 11:18:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 6 "E=2.00e4 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 50 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:19:05.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 2 CORRECT 7 "v1" Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 11:19:21.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.03e7 m/s" Joint Explanation Experimental 75 S0710 S0710-Feb14-10-06-09 2007-02-14 11:29:45.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-667 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 15 S0710 S0710-Feb14-10-06-09 2007-02-14 11:29:55.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-668 label="p";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 25 S0710 S0710-Feb14-10-06-09 2007-02-14 11:30:13.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 2 INCORRECT System-669 label="z";body=earth;time=NIL Joint Explanation Experimental DRAW-BODY 23 S0710 S0710-Feb14-10-06-09 2007-02-14 11:30:37.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-670 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=89 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 24 S0710 S0710-Feb14-10-06-09 2007-02-14 11:31:52.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-671 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=68 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0710 S0710-Feb14-10-06-09 2007-02-14 11:32:19.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-672 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=42 Joint Explanation Experimental DRAW-WEIGHT S0710 S0710-Feb14-10-06-09 2007-02-14 11:32:45.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-673 label="v0";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=53 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0710 S0710-Feb14-10-06-09 2007-02-14 11:32:57.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-674 label="v1";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0710 S0710-Feb14-10-06-09 2007-02-14 11:33:15.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-675 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=60 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN S0710 S0710-Feb14-10-06-09 2007-02-14 11:33:50.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-676 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 28 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:34:13.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-677 label="mp";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:34:32.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 0 "E=4.00e-12 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 36 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:34:52.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 1 CORRECT 1 "v1=0m/s" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:35:05.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 2 "v0=4.30m/s" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 40 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:35:44.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-678 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=98 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0710 S0710-Feb14-10-06-09 2007-02-14 11:36:10.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 INCORRECT 3 "Fg=m*g" Undefined variable: m 1 Joint Explanation Experimental WT-LAW 39 S0710 S0710-Feb14-10-06-09 2007-02-14 11:36:18.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 2 CORRECT 3 "Fg=mp*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:36:47.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 4 "Fe=E*abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 51 (= Fe_ELECTRON_UNSPECIFIED_12 (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:37:16.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-679 label="Fn";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=270;mag=58 Joint Explanation Experimental DRAW-NET-FORCE-FROM-ACCEL S0710 S0710-Feb14-10-06-09 2007-02-14 11:37:32.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 1 TRUE_BUT_IRRELEVANT 5 "Fn=Fg-Fe" Joint Explanation Experimental (= Fnet_ELECTRON_12 (- Fw_ELECTRON_EARTH_12 Fe_ELECTRON_UNSPECIFIED_12)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:38:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 2 TRUE_BUT_IRRELEVANT 6 "a=Fn/mp" Joint Explanation Experimental (= a_ELECTRON_12 (/ Fnet_ELECTRON_12 m_ELECTRON)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:39:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 INCORRECT 7 "d=(v1^2-v0^2)/(2*a)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= s_ELECTRON_12 (/ (- (^ v_ELECTRON_2 2) (^ v_ELECTRON_1 2)) (* 2 a_ELECTRON_12))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:39:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 INCORRECT 7 "d=(v1^2-v0^2)/(2*a)" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= s_ELECTRON_12 (/ (- (^ v_ELECTRON_2 2) (^ v_ELECTRON_1 2)) (* 2 a_ELECTRON_12))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:39:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 INCORRECT 7 "d=(v1^2-v0^2)/(2*a)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= s_ELECTRON_12 (/ (- (^ v_ELECTRON_2 2) (^ v_ELECTRON_1 2)) (* 2 a_ELECTRON_12))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:39:33.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (DEFINE-VAR (DURATION (DURING 1 2))) 1 HINT 7 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental DEFINE-DURATION S0710 S0710-Feb14-10-06-09 2007-02-14 11:43:06.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (DURATION (DURING 1 2))) 2 CORRECT Var-680 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Joint Explanation Experimental DEFINE-DURATION S0710 S0710-Feb14-10-06-09 2007-02-14 11:43:24.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 1 INCORRECT 7 "t=(v1^2-v0^2)/(a)" Units are inconsistent. 1 1 Joint Explanation Experimental COMPO-ZERO-VECTOR (= t_12 (/ (- (^ v_ELECTRON_2 2) (^ v_ELECTRON_1 2)) a_ELECTRON_12)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:43:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 2 INCORRECT 7 "t=(v1-v0)/(a)" Joint Explanation Experimental COMPO-ZERO-VECTOR (= t_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) a_ELECTRON_12)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:43:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 3 INCORRECT 7 "t=(v1-v0)/(a)" Joint Explanation Experimental WRITE-LK-NO-S-COMPO (= t_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) a_ELECTRON_12)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:43:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 4 INCORRECT 7 "t=(v1-v0)/(a)" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= t_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) a_ELECTRON_12)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:43:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 5 INCORRECT 7 "t=(v1-v0)/(a)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= t_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) a_ELECTRON_12)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:43:56.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 6 HINT 7 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental COMPO-ZERO-VECTOR S0710 S0710-Feb14-10-06-09 2007-02-14 11:44:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 7 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Joint Explanation Experimental COMPO-ZERO-VECTOR 46 S0710 S0710-Feb14-10-06-09 2007-02-14 11:44:20.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 8 CORRECT 7 "t=(v1-v0)/(a_y)" Although equation 8 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-ZERO-VECTOR 48 (= t_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) Yc_a_ELECTRON_12_0)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:44:20.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 1 CORRECT 7 "t=(v1-v0)/(a_y)" Although equation 8 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-S-COMPO 48 (= t_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) Yc_a_ELECTRON_12_0)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:44:20.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 2 CORRECT 7 "t=(v1-v0)/(a_y)" Although equation 8 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-IMPLICIT-EQN 48 (= t_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) Yc_a_ELECTRON_12_0)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:44:20.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 2 CORRECT 7 "t=(v1-v0)/(a_y)" Although equation 8 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 48 (= t_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) Yc_a_ELECTRON_12_0)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:44:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 3 INCORRECT 8 "a_y=a" Joint Explanation Experimental (= Yc_a_ELECTRON_12_0 a_ELECTRON_12) S0710 S0710-Feb14-10-06-09 2007-02-14 11:44:55.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A No Intepretation 4 INCORRECT 8 "a_y=a*cos($q)" Undefined variable: $q 1 Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 11:45:36.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 5 TRUE_BUT_IRRELEVANT 8 "a_y=-a" Joint Explanation Experimental (= Yc_a_ELECTRON_12_0 (- a_ELECTRON_12)) S0710 S0710-Feb14-10-06-09 2007-02-14 11:46:19.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 3 CORRECT 9 "d=v0*t+.5*a_y*t^2" Although equation 10 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 52 (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:46:19.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 2 CORRECT 9 "d=v0*t+.5*a_y*t^2" Although equation 10 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO 52 (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:46:19.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 2 CORRECT 9 "d=v0*t+.5*a_y*t^2" Although equation 10 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 52 (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:46:27.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 3 HINT 7 It is good practice to identify the fundamental vector principles you are using by writing them purely symbolically in component form before combining them with other equations or given values. Select "Review Physics Equations" on the Help menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0710 S0710-Feb14-10-06-09 2007-02-14 11:46:27.0 US/Eastern DELETION ELEC* ELEC6A 9 Delete Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 11:47:08.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 4 CORRECT 9 "d_y=d" Joint Explanation Experimental COMPO-PARALLEL-AXIS 48 (= Yc_s_ELECTRON_12_0 s_ELECTRON_12) S0710 S0710-Feb14-10-06-09 2007-02-14 11:47:13.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 4 CORRECT 10 "d_y=v0*t+.5*a_y*t^2" Although equation 11 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 52 (= Yc_s_ELECTRON_12_0 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:47:13.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 3 CORRECT 10 "d_y=v0*t+.5*a_y*t^2" Although equation 11 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO 52 (= Yc_s_ELECTRON_12_0 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:47:34.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 6 INCORRECT 8 "a_y=a*cos($qa)" Joint Explanation Experimental (= Yc_a_ELECTRON_12_0 (* a_ELECTRON_12 (COS Oa_ELECTRON_12))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:47:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 7 TRUE_BUT_IRRELEVANT 8 "a_y=a*sin($qa)" Joint Explanation Experimental (= Yc_a_ELECTRON_12_0 (* a_ELECTRON_12 (SIN Oa_ELECTRON_12))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:47:58.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 5 CORRECT 9 "d_y=d*sin($qd)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_s_ELECTRON_12_0 (* s_ELECTRON_12 (SIN Os_ELECTRON_12))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:48:00.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 5 CORRECT 10 "d_y=v0*t+.5*a_y*t^2" Although equation 11 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_s_ELECTRON_12_0 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:48:00.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 4 CORRECT 10 "d_y=v0*t+.5*a_y*t^2" Although equation 11 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= Yc_s_ELECTRON_12_0 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:48:33.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 6 CORRECT 10 "d=v0*t+.5*a_y*t^2" Although equation 11 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:48:33.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 5 CORRECT 10 "d=v0*t+.5*a_y*t^2" Although equation 11 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:48:33.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 6 CORRECT 10 "d=v0*t+.5*a_y*t^2" Although equation 11 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:48:33.0 US/Eastern DELETION ELEC* ELEC6A 10 Delete Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 11:49:15.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 7 INCORRECT 10 "a_x=a*cos($qa)" The variable a_x is not used in any solution I know of. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0710 S0710-Feb14-10-06-09 2007-02-14 11:49:15.0 US/Eastern DELETION ELEC* ELEC6A 10 Delete Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 11:49:15.0 US/Eastern DELETION ELEC* ELEC6A 12 Delete Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 11:49:31.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 8 CORRECT 10 "d=v0*t+.5*a_y*t^2" Although equation 11 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 52 (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:49:31.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 6 CORRECT 10 "d=v0*t+.5*a_y*t^2" Although equation 11 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO 52 (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:49:31.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 7 CORRECT 10 "d=v0*t+.5*a_y*t^2" Although equation 11 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 52 (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0710 S0710-Feb14-10-06-09 2007-02-14 11:49:41.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 1 CORRECT 11 "d" Joint Explanation Experimental S0710 S0710-Feb14-10-06-09 2007-02-14 11:49:51.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC6A Answer-1 1 CORRECT Answer-1 "1.02m" Joint Explanation Experimental 77 S0711 S0711-Feb14-16-05-29 2007-02-14 16:14:53.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 1 CORRECT System-1 label="q";body=particle;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0711 S0711-Feb14-16-05-29 2007-02-14 16:14:53.0 US/Eastern DELETION FOR* FOR4C Vector-2 Delete label=NIL Joint Explanation Experimental S0711 S0711-Feb14-16-05-29 2007-02-14 16:15:55.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 CORRECT Vector-3 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=199 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0711 S0711-Feb14-16-05-29 2007-02-14 16:16:50.0 US/Eastern ATTEMPT Variable RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 INCORRECT Var-4 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6" Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE 13 (= Q_PARTICLE (- 7.900000000000001e-6)) S0711 S0711-Feb14-16-05-29 2007-02-14 16:17:16.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 CORRECT Var-4 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Joint Explanation Experimental DEFINE-CHARGE 21 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0711 S0711-Feb14-16-05-29 2007-02-14 16:17:56.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 CORRECT Vector-3 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=199 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 22 S0711 S0711-Feb14-16-05-29 2007-02-14 16:18:18.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 0 "E=14.3e+3 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 29 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0711 S0711-Feb14-16-05-29 2007-02-14 16:18:28.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 INCORRECT 1 "F=E*q" Undefined variable: F 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0711 S0711-Feb14-16-05-29 2007-02-14 16:19:23.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 1 INCORRECT Vector-5 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=179 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 28 S0711 S0711-Feb14-16-05-29 2007-02-14 16:19:43.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 2 INCORRECT Vector-5 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=22;mag=179 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES S0711 S0711-Feb14-16-05-29 2007-02-14 16:19:48.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 3 HINT Vector-5 label=F Do you really want the direction of that vector to be 22 degrees? 1 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES S0711 S0711-Feb14-16-05-29 2007-02-14 16:20:14.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 4 CORRECT Vector-5 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=202;mag=179 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES S0711 S0711-Feb14-16-05-29 2007-02-14 16:20:18.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 1 INCORRECT 1 "F=E*q" Joint Explanation Experimental COMPO-GENERAL-CASE (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0711 S0711-Feb14-16-05-29 2007-02-14 16:20:18.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 1 INCORRECT 1 "F=E*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0711 S0711-Feb14-16-05-29 2007-02-14 16:20:18.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= (+ Yc_Fe_PARTICLE_UNSPECIFIED_1_0) Yc_Fnet_PARTICLE_1_0)) 1 INCORRECT 1 "F=E*q" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0711 S0711-Feb14-16-05-29 2007-02-14 16:20:18.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fnet_PARTICLE_1_0 (* Fnet_PARTICLE_1 (SIN (- (DNUM 202 deg) (DNUM 0 deg)))))) 1 INCORRECT 1 "F=E*q" Joint Explanation Experimental COMPO-GENERAL-CASE (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0711 S0711-Feb14-16-05-29 2007-02-14 16:20:48.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 3 CORRECT Vector-3 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=199 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0711 S0711-Feb14-16-05-29 2007-02-14 16:21:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 2 CORRECT 1 "F=E*abs(q)" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-GENERAL-CASE 48 (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED (ABS Q_PARTICLE))) S0711 S0711-Feb14-16-05-29 2007-02-14 16:21:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 2 CORRECT 1 "F=E*abs(q)" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 48 (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED (ABS Q_PARTICLE))) S0711 S0711-Feb14-16-05-29 2007-02-14 16:21:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= (+ Yc_Fe_PARTICLE_UNSPECIFIED_1_0) Yc_Fnet_PARTICLE_1_0)) 2 CORRECT 1 "F=E*abs(q)" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-NET-FORCE-COMPO 48 (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED (ABS Q_PARTICLE))) S0711 S0711-Feb14-16-05-29 2007-02-14 16:21:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_Fnet_PARTICLE_1_0 (* Fnet_PARTICLE_1 (SIN (- (DNUM 202 deg) (DNUM 0 deg)))))) 2 CORRECT 1 "F=E*abs(q)" Although equation 2 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-GENERAL-CASE 48 (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED (ABS Q_PARTICLE))) S0711 S0711-Feb14-16-05-29 2007-02-14 16:21:50.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT Vector-4 label=F It is good practice to identify the fundamental vector principles you are using by writing them purely symbolically in component form before combining them with other equations or given values. Select "Review Physics Equations" on the Help menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0711 S0711-Feb14-16-05-29 2007-02-14 16:22:28.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 CORRECT Vector-5 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=179 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0711 S0711-Feb14-16-05-29 2007-02-14 16:22:33.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 CORRECT 1 "F=E*abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 63 (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED (ABS Q_PARTICLE))) S0711 S0711-Feb14-16-05-29 2007-02-14 16:22:51.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 2 "F" Joint Explanation Experimental S0711 S0711-Feb14-16-05-29 2007-02-14 16:22:54.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Q_PARTICLE (DNUM -7.9 $mC))) 1 CORRECT 2 "F = 0.11297 N" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Fe_PARTICLE_UNSPECIFIED_1 (DNUM 0.11297 N)) S0711 S0711-Feb14-16-05-29 2007-02-14 16:22:54.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 2 CORRECT 2 "F = 0.11297 N" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Fe_PARTICLE_UNSPECIFIED_1 (DNUM 0.11297 N)) S0711 S0711-Feb14-16-05-29 2007-02-14 16:22:54.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 2 CORRECT 2 "F = 0.11297 N" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (DNUM 0.11297 N)) S0711 S0711-Feb14-16-05-29 2007-02-14 16:23:05.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 ".113 N" Joint Explanation Experimental 88 S0711 S0711-Feb14-16-05-29 2007-02-14 16:32:45.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="p";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0711 S0711-Feb14-16-05-29 2007-02-14 16:32:45.0 US/Eastern DELETION ELEC* ELEC1C Axes-668 Delete label=NIL Joint Explanation Experimental S0711 S0711-Feb14-16-05-29 2007-02-14 16:32:45.0 US/Eastern DELETION ELEC* ELEC1C Axes-669 Delete label=NIL Joint Explanation Experimental S0711 S0711-Feb14-16-05-29 2007-02-14 16:33:24.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-670 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-COMPO-FORM-AXES 25 S0711 S0711-Feb14-16-05-29 2007-02-14 16:33:58.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=90;mag=98 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 23 S0711 S0711-Feb14-16-05-29 2007-02-14 16:35:03.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 INCORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=90;mag=98 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 22 S0711 S0711-Feb14-16-05-29 2007-02-14 16:35:06.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 HINT Vector-671 label=E Do you really want the direction of that vector to be 90 degrees? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0711 S0711-Feb14-16-05-29 2007-02-14 16:35:10.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 HINT You can determine the direction of the electric field at the region due to an unspecified agent from the problem statement 2 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0711 S0711-Feb14-16-05-29 2007-02-14 16:36:29.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 CORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=98 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 23 S0711 S0711-Feb14-16-05-29 2007-02-14 16:36:56.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-672 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=92 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0711 S0711-Feb14-16-05-29 2007-02-14 16:37:04.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 2 CORRECT Vector-672 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=92 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 24 S0711 S0711-Feb14-16-05-29 2007-02-14 16:37:43.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 CORRECT Vector-673 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=166 Joint Explanation Experimental DRAW-WEIGHT S0711 S0711-Feb14-16-05-29 2007-02-14 16:38:34.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-674 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 31 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0711 S0711-Feb14-16-05-29 2007-02-14 16:38:54.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-675 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 39 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0711 S0711-Feb14-16-05-29 2007-02-14 16:39:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 CORRECT 0 "Fg=me*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0711 S0711-Feb14-16-05-29 2007-02-14 16:39:23.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 CORRECT 1 "Fg=Fe" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) S0711 S0711-Feb14-16-05-29 2007-02-14 16:39:23.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 1 "Fg=Fe" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) S0711 S0711-Feb14-16-05-29 2007-02-14 16:39:23.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 1 "Fg=Fe" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) S0711 S0711-Feb14-16-05-29 2007-02-14 16:39:23.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 1 "Fg=Fe" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) S0711 S0711-Feb14-16-05-29 2007-02-14 16:39:47.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 INCORRECT 2 "E=Fe/qe" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= E_REGION_UNSPECIFIED (/ Fe_ELECTRON_UNSPECIFIED_1 Q_ELECTRON)) S0711 S0711-Feb14-16-05-29 2007-02-14 16:40:12.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 CORRECT 2 "E=Fe/abs(qe)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 74 (= E_REGION_UNSPECIFIED (/ Fe_ELECTRON_UNSPECIFIED_1 (ABS Q_ELECTRON))) S0711 S0711-Feb14-16-05-29 2007-02-14 16:40:36.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 INCORRECT 3 "E_y" Unable to solve for E_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0711 S0711-Feb14-16-05-29 2007-02-14 16:40:55.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 2 CORRECT 3 "E" Joint Explanation Experimental S0711 S0711-Feb14-16-05-29 2007-02-14 16:41:23.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 CORRECT Answer-1 "5.58e-11 N/C" Joint Explanation Experimental 99 S0711 S0711-Feb14-16-05-29 2007-02-14 16:52:06.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 CORRECT System-1 label="p";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0711 S0711-Feb14-16-05-29 2007-02-14 16:52:35.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-2 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0;dir=90;mag=92 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 12 S0711 S0711-Feb14-16-05-29 2007-02-14 16:52:50.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-2 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=92 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 13 S0711 S0711-Feb14-16-05-29 2007-02-14 16:53:29.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-3 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=86 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP 14 S0711 S0711-Feb14-16-05-29 2007-02-14 16:53:52.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-4 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 18 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0711 S0711-Feb14-16-05-29 2007-02-14 16:54:20.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 0 "a=F/m" Joint Explanation Experimental (= a_ELECTRON_12 (/ Fe_ELECTRON_PLATES_12 m_ELECTRON)) S0711 S0711-Feb14-16-05-29 2007-02-14 16:55:13.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-5 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value=".015 m" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 17 S0711 S0711-Feb14-16-05-29 2007-02-14 16:55:23.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Var-5 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T1;value=".015 m" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0711 S0711-Feb14-16-05-29 2007-02-14 16:55:51.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT Var-5 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T1;value="1.5 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0711 S0711-Feb14-16-05-29 2007-02-14 16:55:53.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Var-5 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0711 S0711-Feb14-16-05-29 2007-02-14 16:56:37.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 2 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0711 S0711-Feb14-16-05-29 2007-02-14 16:56:48.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 INCORRECT Var-5 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T1;value="1.5 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 16 S0711 S0711-Feb14-16-05-29 2007-02-14 16:56:48.0 US/Eastern DELETION ELEC* ELEC3A Var-5 Delete label=s Joint Explanation Experimental S0711 S0711-Feb14-16-05-29 2007-02-14 16:57:16.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 INCORRECT Vector-6 label="d";type=Displacement;body=electron;agent=NIL;time=T1;dir=90;mag=86 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0711 S0711-Feb14-16-05-29 2007-02-14 16:57:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 INCORRECT Vector-6 label="d";type=Displacement;body=electron;agent=NIL;time=T1;dir=90;mag=86 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0711 S0711-Feb14-16-05-29 2007-02-14 16:57:42.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 HINT Vector-6 label=d You don't need to draw the displacement at T1. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0711 S0711-Feb14-16-05-29 2007-02-14 16:59:04.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 10 CORRECT Vector-6 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=86 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0711 S0711-Feb14-16-05-29 2007-02-14 16:59:15.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 1 "d=1.5 cm" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 20 (= s_ELECTRON_12 (DNUM 1.5 cm)) S0711 S0711-Feb14-16-05-29 2007-02-14 17:00:08.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 1 INCORRECT 2 "d=.5*a*T1^2" Undefined variable: T1 1 Joint Explanation Experimental DEFINE-DURATION S0711 S0711-Feb14-16-05-29 2007-02-14 17:00:42.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 2 CORRECT Var-7 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Joint Explanation Experimental DEFINE-DURATION S0711 S0711-Feb14-16-05-29 2007-02-14 17:00:47.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 2 TRUE_BUT_IRRELEVANT 2 "d=.5*a*t^2" Joint Explanation Experimental (= s_ELECTRON_12 (* (* 0.5 a_ELECTRON_12) (^ t_12 2))) S0711 S0711-Feb14-16-05-29 2007-02-14 17:01:04.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 INCORRECT 3 "t" Unable to solve for t. One thing you probably need is an equation specifying the given value of the magnitude of the electric field at the region due to the plates. 1 1 Joint Explanation Experimental S0711 S0711-Feb14-16-05-29 2007-02-14 17:01:33.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-8 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=137 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0711 S0711-Feb14-16-05-29 2007-02-14 17:01:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 3 "E=2.00e+4 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 24 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0711 S0711-Feb14-16-05-29 2007-02-14 17:02:34.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-9 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 28 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0711 S0711-Feb14-16-05-29 2007-02-14 17:02:42.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 CORRECT 4 "F=E*abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 40 (= Fe_ELECTRON_PLATES_12 (* E_REGION_PLATES (ABS Q_ELECTRON))) S0711 S0711-Feb14-16-05-29 2007-02-14 17:02:55.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 2 CORRECT 5 "t" Joint Explanation Experimental S0711 S0711-Feb14-16-05-29 2007-02-14 17:03:10.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-9 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0711 S0711-Feb14-16-05-29 2007-02-14 17:03:10.0 US/Eastern DELETION ELEC* ELEC3A Var-10 Delete label=NIL Joint Explanation Experimental S0711 S0711-Feb14-16-05-29 2007-02-14 17:03:48.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 CORRECT Vector-11 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=107 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0711 S0711-Feb14-16-05-29 2007-02-14 17:04:16.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 3 TRUE_BUT_IRRELEVANT 6 "v=a*t" Joint Explanation Experimental (= v_ELECTRON_2 (* a_ELECTRON_12 t_12)) S0711 S0711-Feb14-16-05-29 2007-02-14 17:04:22.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 3 CORRECT 7 "v" Joint Explanation Experimental S0711 S0711-Feb14-16-05-29 2007-02-14 17:04:40.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.03e+7 m/s" Joint Explanation Experimental 65 S0711 S0711-Feb14-16-05-29 2007-02-14 17:17:07.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="q";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0711 S0711-Feb14-16-05-29 2007-02-14 17:17:31.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-668 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 19 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0711 S0711-Feb14-16-05-29 2007-02-14 17:17:46.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-669 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 22 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0711 S0711-Feb14-16-05-29 2007-02-14 17:17:58.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-670 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 32 S0711 S0711-Feb14-16-05-29 2007-02-14 17:18:22.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=119 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0711 S0711-Feb14-16-05-29 2007-02-14 17:18:51.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-672 label="Fw";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=145 Joint Explanation Experimental DRAW-WEIGHT S0711 S0711-Feb14-16-05-29 2007-02-14 17:19:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-673 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=270;mag=136 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0711 S0711-Feb14-16-05-29 2007-02-14 17:20:13.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-673 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=136 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0711 S0711-Feb14-16-05-29 2007-02-14 17:21:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-674 label="Fn";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=270;mag=130 Joint Explanation Experimental DRAW-NET-FORCE-FROM-ACCEL S0711 S0711-Feb14-16-05-29 2007-02-14 17:22:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 0 "Fe=abs(qe)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 44 (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0711 S0711-Feb14-16-05-29 2007-02-14 17:22:20.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 CORRECT 1 "Fw=me*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH)) S0711 S0711-Feb14-16-05-29 2007-02-14 17:22:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 1 TRUE_BUT_IRRELEVANT 2 "Fn=Fw-Fe" Joint Explanation Experimental (= Fnet_ELECTRON_12 (- Fw_ELECTRON_EARTH_12 Fe_ELECTRON_UNSPECIFIED_12)) S0711 S0711-Feb14-16-05-29 2007-02-14 17:22:56.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 2 INCORRECT 3 "a=Fn/me" Undefined variable: a 1 Joint Explanation Experimental DEFINE-MASS 43 S0711 S0711-Feb14-16-05-29 2007-02-14 17:23:04.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 3 CORRECT Var-669 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS (= m_ELECTRON (DNUM 9.11e-31 kg)) S0711 S0711-Feb14-16-05-29 2007-02-14 17:23:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-675 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=74 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN 44 S0711 S0711-Feb14-16-05-29 2007-02-14 17:23:48.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 2 TRUE_BUT_IRRELEVANT 3 "a=Fn/me" Joint Explanation Experimental (= a_ELECTRON_12 (/ Fnet_ELECTRON_12 m_ELECTRON)) S0711 S0711-Feb14-16-05-29 2007-02-14 17:24:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-676 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=122 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0711 S0711-Feb14-16-05-29 2007-02-14 17:24:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-677 label="v0";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=103 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0711 S0711-Feb14-16-05-29 2007-02-14 17:24:54.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 4 "v0=4.30 m/s" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 47 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0711 S0711-Feb14-16-05-29 2007-02-14 17:25:07.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-678 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0711 S0711-Feb14-16-05-29 2007-02-14 17:25:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 1 CORRECT 5 "vf=0 m/s" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s)) S0711 S0711-Feb14-16-05-29 2007-02-14 17:26:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 INCORRECT 6 "vf^2=v0^2+2*a*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0711 S0711-Feb14-16-05-29 2007-02-14 17:26:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 INCORRECT 6 "vf^2=v0^2+2*a*d" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0711 S0711-Feb14-16-05-29 2007-02-14 17:26:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 INCORRECT 6 "vf^2=v0^2+2*a*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0711 S0711-Feb14-16-05-29 2007-02-14 17:26:33.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 1 INCORRECT 7 "a" Unable to solve for a. One thing you probably need is an equation specifying the given value of E. 1 1 Joint Explanation Experimental S0711 S0711-Feb14-16-05-29 2007-02-14 17:26:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 7 "E=4.00e-12 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 51 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0711 S0711-Feb14-16-05-29 2007-02-14 17:27:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 2 INCORRECT 6 "vf^2=v0^2+2*a*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0711 S0711-Feb14-16-05-29 2007-02-14 17:27:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 2 INCORRECT 6 "vf^2=v0^2+2*a*d" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0711 S0711-Feb14-16-05-29 2007-02-14 17:27:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 2 INCORRECT 6 "vf^2=v0^2+2*a*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0711 S0711-Feb14-16-05-29 2007-02-14 17:27:12.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 2 CORRECT 8 "a" Joint Explanation Experimental S0711 S0711-Feb14-16-05-29 2007-02-14 17:27:31.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-676 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=122 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0711 S0711-Feb14-16-05-29 2007-02-14 17:28:19.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A No Intepretation 3 HINT 6 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental S0711 S0711-Feb14-16-05-29 2007-02-14 17:28:47.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 4 TRUE_BUT_IRRELEVANT 6 "vf^2=v0^2+2*-a*d" Joint Explanation Experimental (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 (- a_ELECTRON_12)) s_ELECTRON_12))) S0711 S0711-Feb14-16-05-29 2007-02-14 17:28:58.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 3 CORRECT 9 "d" Joint Explanation Experimental S0711 S0711-Feb14-16-05-29 2007-02-14 17:29:16.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC6A Answer-1 1 CORRECT Answer-1 "1.02 m" Joint Explanation Experimental 76 S0712 S0712-Feb15-11-39-09 2007-02-15 11:48:35.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 INCORRECT Vector-1 label="E";type=E-field;body=region;agent=particle;time=NIL;dir=22;mag=167 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 11:50:31.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 INCORRECT 0 "F=q*E" The variable E is not used in any solution I know of. 1 Self-explanation Control DEFINE-CHARGE S0712 S0712-Feb15-11-39-09 2007-02-15 11:50:40.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 HINT Var-5 label=q I can only recognize equations and variables from solutions I know about. This variable is not used in any of the solutions I have recorded for this problem. It's possible you are pursuing a solution that I don't know about, but if so, I can't help you with it and simpler solutions are probably available. 2 2 Self-explanation Control DEFINE-CHARGE S0712 S0712-Feb15-11-39-09 2007-02-15 11:51:31.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 3 CORRECT Var-2 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Self-explanation Control DEFINE-CHARGE 9 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0712 S0712-Feb15-11-39-09 2007-02-15 11:52:20.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 INCORRECT 0 "E=14.33+3 N/C" The variable E is not used in any solution I know of. 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 11:52:35.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 3 INCORRECT 0 "E=14.3e+3 N/C" The variable E is not used in any solution I know of. 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 11:52:40.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 4 HINT I can only recognize equations and variables from solutions I know about. This variable is not used in any of the solutions I have recorded for this problem. It's possible you are pursuing a solution that I don't know about, but if so, I can't help you with it and simpler solutions are probably available. 2 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 11:52:53.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 5 HINT Vector-1 label=E Is the particle the source of the electric field you are defining? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 11:53:01.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 6 HINT A better choice (but maybe not the only one) would be the field due to an unspecified agent, not the particle 2 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR 4 S0712 S0712-Feb15-11-39-09 2007-02-15 11:53:01.0 US/Eastern DELETION FOR* FOR4C Vector-1 Delete label=E Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 11:53:23.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 7 CORRECT Vector-3 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=106 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 11:53:26.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 0 "E=14.3e+3 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 12 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0712 S0712-Feb15-11-39-09 2007-02-15 11:54:06.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 1 INCORRECT Vector-4 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=75;mag=206 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0712 S0712-Feb15-11-39-09 2007-02-15 11:54:08.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 HINT Vector-4 label=F Do you really want the direction of that vector to be 75 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 11:54:11.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT Since the forces acting on the particle at T0 are all pointing in the same direction, the direction of the total force is known. 2 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0712 S0712-Feb15-11-39-09 2007-02-15 11:54:15.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 HINT Draw a non-zero net force vector for the particle at T0 at 202 degrees. 3 3 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES 7 S0712 S0712-Feb15-11-39-09 2007-02-15 11:54:15.0 US/Eastern DELETION FOR* FOR4C Vector-4 Delete label=F Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 11:54:15.0 US/Eastern DELETION FOR* FOR4C Vector-5 Delete label=NIL Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 11:55:00.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 4 INCORRECT Vector-6 label="F";type=Force;body=particle;agent=particle;forcetype=Magnetic;time=T0;dir=22;mag=140 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 11:55:04.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 5 HINT Vector-6 label=F A force arise from the interaction of two DIFFERENT objects, but you have used the particle for both. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 11:55:06.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 6 HINT If you were trying to draw the net force on the particle, then double click on this force and look carefully at the dialog box. There is a button for defining the net force. 2 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 2 S0712 S0712-Feb15-11-39-09 2007-02-15 11:55:45.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 7 INCORRECT Vector-6 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=140 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 11:56:18.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 8 INCORRECT Vector-6 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=140 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 1 S0712 S0712-Feb15-11-39-09 2007-02-15 11:56:21.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 9 HINT Vector-6 label=F Do you really want the direction of that vector to be 22 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 11:56:23.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 10 HINT Think about how the direction of the electric force on the particle due to an unspecified agent is related to the direction of the electric field vector. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 11:56:32.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 11 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 11:56:44.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 12 HINT Because the charge of the particle is negative, use the force drawing tool (labeled F) to draw the electric force on the particle due to an unspecified agent in the opposite direction as the electric field at that location, namely 202 degrees. 4 4 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR -4 S0712 S0712-Feb15-11-39-09 2007-02-15 11:56:53.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 13 HINT Vector-6 label=F Do you really want the direction of that vector to be 22 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 11:57:03.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 14 CORRECT Vector-6 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=140 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR -3 S0712 S0712-Feb15-11-39-09 2007-02-15 11:57:58.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 CORRECT 1 "F=abs(q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 32 (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED)) S0712 S0712-Feb15-11-39-09 2007-02-15 11:58:07.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 2 "F" Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 11:58:16.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 "0.113 N" Self-explanation Control 57 S0712 S0712-Feb15-11-39-09 2007-02-15 12:08:49.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 S0712 S0712-Feb15-11-39-09 2007-02-15 12:09:10.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 HINT Var-668 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e.19 C" Internal error: could not process equation. 1 1 Self-explanation Control DEFINE-CHARGE 12 (= Q_ELECTRON (* (- 1.60E.19) (DNUM 1 C))) S0712 S0712-Feb15-11-39-09 2007-02-15 12:09:44.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-669 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31kg" Self-explanation Control DEFINE-MASS 21 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0712 S0712-Feb15-11-39-09 2007-02-15 12:09:44.0 US/Eastern DELETION ELEC* ELEC1C Var-668 Delete label=q Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:10:10.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-670 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Self-explanation Control DEFINE-CHARGE 29 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0712 S0712-Feb15-11-39-09 2007-02-15 12:10:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=1;mag=198 Self-explanation Control DRAW-FIELD-GIVEN-DIR 28 S0712 S0712-Feb15-11-39-09 2007-02-15 12:10:43.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 HINT Vector-671 label=E Do you really want the direction of that vector to be 1 degrees? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:10:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 HINT You can determine the direction of the electric field at the region due to an unspecified agent from the problem statement 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:10:51.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 HINT Use the electric field drawing tool to draw the electric field at the region due to an unspecified agent in the given direction of 270 degrees. 3 3 Self-explanation Control DRAW-FIELD-GIVEN-DIR 23 S0712 S0712-Feb15-11-39-09 2007-02-15 12:11:04.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 CORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=198 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:11:04.0 US/Eastern DELETION ELEC* ELEC1C Axes-672 Delete label=NIL Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:11:04.0 US/Eastern DELETION ELEC* ELEC1C Axes-673 Delete label=NIL Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:12:52.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (DRAW-AXES 0) 1 HINT Vector-672 label=E It is now a good idea for you to draw an axis. This will help to ground your work and be useful later on in the process. 1 Self-explanation Control DRAW-COMPO-FORM-AXES S0712 S0712-Feb15-11-39-09 2007-02-15 12:13:01.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (DRAW-AXES 0) 2 HINT Vector-672 label=E Why don't you draw a pair of standard axes setting the positive X axis at 0 degrees. 2 2 Self-explanation Control DRAW-COMPO-FORM-AXES 18 S0712 S0712-Feb15-11-39-09 2007-02-15 12:13:01.0 US/Eastern DELETION ELEC* ELEC1C Axes-674 Delete label=NIL Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:13:26.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 3 CORRECT Axes-675 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-COMPO-FORM-AXES 29 S0712 S0712-Feb15-11-39-09 2007-02-15 12:13:32.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:13:38.0 US/Eastern CANCEL ELEC* ELEC1C Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:13:41.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 2 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:14:19.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 3 HINT #.(wb-quant '(define-variable "E" |NIL| |E-field| |region| |NIL| |electron| NIL "") 'mag) That quantity is not mentioned in the Andes solution. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:14:28.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 4 HINT #.(wb-quant '(define-variable "E" |NIL| |E-field| |region| |NIL| |electron| NIL "") 'mag) In order to move ahead, you have to try selecting something that you haven't tried before. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:14:38.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 5 HINT #.(wb-quant '(define-variable "E" |NIL| |E-field| |region| |NIL| |Unspecified| NIL "") 'mag) Yes. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 4 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:15:08.0 US/Eastern CANCEL ELEC* ELEC1C Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:15:39.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 6 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:15:53.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 7 HINT #.(wb-quant '(define-variable "E" |NIL| |E-field| |region| |NIL| |Unspecified| NIL "") 'mag) Very good. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:16:09.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 8 HINT (point-charge-efield ((?axis . y))) No principle applications of the type that you selected appear in the solution. What is the first principle application that you wish to work on? You should look for a principle that contains the sought quantity itself. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:16:19.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 9 HINT (net-field-electric ((?axis . y))) No principle applications of the type that you selected appear in the solution. Lets just assume that you will work on applying the definition of electric field magnitude at the electron at T0. 4 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:16:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 10 HINT You should be introducing a variable for the magnitude of the electric force on the electron at T0 due to an unspecified agent. 5 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:16:28.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 11 HINT Think about how the direction of the electric force on the electron due to an unspecified agent is related to the direction of the electric field vector. 6 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:16:32.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 12 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 7 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:16:35.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 13 HINT Because the charge of the electron is negative, use the force drawing tool (labeled F) to draw the electric force on the electron due to an unspecified agent in the opposite direction as the electric field at that location, namely 90 degrees. 8 8 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 24 S0712 S0712-Feb15-11-39-09 2007-02-15 12:17:07.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 14 CORRECT Vector-676 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=111 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:17:11.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 HINT 0 Why don't you continue working on applying the definition of electric field magnitude at the electron at T0. 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0712 S0712-Feb15-11-39-09 2007-02-15 12:17:25.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 HINT 0 What is the relationship between the force, the charge and the electric field? 2 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0712 S0712-Feb15-11-39-09 2007-02-15 12:17:29.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 3 HINT 0 The electric field vector at a location is defined as electric force vector per unit charge. That is, the electric force vector that a test charge would undergo if placed there, divided by the size of the charge. This definition can be applied to relate force and field magnitudes. 3 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0712 S0712-Feb15-11-39-09 2007-02-15 12:17:36.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 4 HINT 0 Write the equation F = (ABS q) * E 4 4 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 19 S0712 S0712-Feb15-11-39-09 2007-02-15 12:17:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 5 CORRECT 0 "F=abs(q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 54 (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0712 S0712-Feb15-11-39-09 2007-02-15 12:18:11.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 INCORRECT 1 "E" Unable to solve for E. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:18:17.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 HINT Why don't you continue with the solution by working on applying Newton's second law to the electron at T0. 1 Self-explanation Control DRAW-WEIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:18:21.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 2 HINT Your goal should be drawing a free-body diagram for the electron at T0. 2 Self-explanation Control DRAW-WEIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:18:25.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 3 HINT Try drawing all the forces acting on the electron at T0. 3 Self-explanation Control DRAW-WEIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:18:28.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 4 HINT Notice that the electron is near the earth. 4 Self-explanation Control DRAW-WEIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:18:31.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 5 HINT When an object is near a planet, the planet exerts a weight force on the object. 5 Self-explanation Control DRAW-WEIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:18:33.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 6 HINT Because the electron is near the planet the earth, the planet exerts a weight force on it, so use the force drawing tool to draw a force on the electron due to the earth of type weight at T0. 6 6 Self-explanation Control DRAW-WEIGHT 49 S0712 S0712-Feb15-11-39-09 2007-02-15 12:19:03.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 7 CORRECT Vector-677 label="Fmg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=96 Self-explanation Control DRAW-WEIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:19:19.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 1 HINT Why don't you continue working on applying Newton's second law to the electron at T0. 1 Self-explanation Control ACCEL-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:19:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 2 HINT Notice that the electron is at rest at T0. 2 Self-explanation Control ACCEL-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:19:23.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 3 HINT If a body is at rest throughout some time interval, its average acceleration during that interval is zero. 3 Self-explanation Control ACCEL-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:19:25.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 4 HINT Because the electron is at rest at T0, use the acceleration tool to draw a zero-length acceleration vector for it. 4 4 Self-explanation Control ACCEL-AT-REST 44 S0712 S0712-Feb15-11-39-09 2007-02-15 12:19:25.0 US/Eastern DELETION ELEC* ELEC1C Vector-678 Delete label=NIL Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:20:04.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 5 HINT Why don't you continue working on applying Newton's second law to the electron at T0. 1 Self-explanation Control ACCEL-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:20:06.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 6 HINT Notice that the electron is at rest at T0. 2 Self-explanation Control ACCEL-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:20:08.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 7 HINT If a body is at rest throughout some time interval, its average acceleration during that interval is zero. 3 Self-explanation Control ACCEL-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:20:12.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 8 HINT Because the electron is at rest at T0, use the acceleration tool to draw a zero-length acceleration vector for it. 4 4 Self-explanation Control ACCEL-AT-REST 39 S0712 S0712-Feb15-11-39-09 2007-02-15 12:20:46.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 9 INCORRECT Vector-679 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T0;dir=180;mag=114 Self-explanation Control ACCEL-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:20:51.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 10 HINT Vector-679 label=a Are you sure that vector has a non-zero magnitude? 1 Self-explanation Control ACCEL-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:20:57.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 11 HINT Notice that the electron is at rest at T0. 2 Self-explanation Control ACCEL-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:20:59.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 12 HINT If a body is at rest throughout some time interval, its average acceleration during that interval is zero. 3 Self-explanation Control ACCEL-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:21:03.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 13 HINT Because the electron is at rest at T0, use the acceleration tool to draw a zero-length acceleration vector for it. 4 4 Self-explanation Control ACCEL-AT-REST 34 S0712 S0712-Feb15-11-39-09 2007-02-15 12:21:03.0 US/Eastern DELETION ELEC* ELEC1C Vector-679 Delete label=a Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:21:31.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 14 CORRECT Vector-680 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Self-explanation Control ACCEL-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:21:41.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 1 HINT 1 Why don't you continue working on applying Newton's second law to the electron at T0. 1 Self-explanation Control WRITE-NFL-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 12:21:44.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 2 HINT 1 You can apply Newton's second law to the electron. Note that the electron is not accelerating at T0. 2 Self-explanation Control WRITE-NFL-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 12:21:46.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 3 HINT 1 Newton's second law F = m*a states that the net force on an object = the object's mass times its acceleration. In this case the acceleration is zero so you know the sum of all forces on the object must be zero. This vector principle can be applied component-wise to require that the force components in any direction sum to zero. 3 Self-explanation Control WRITE-NFL-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 12:21:56.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 4 HINT 1 Because the electron is not accelerating at T0, write Newton's second law as Fmg_y + F_y = 0 4 4 Self-explanation Control WRITE-NFL-COMPO 29 S0712 S0712-Feb15-11-39-09 2007-02-15 12:22:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 5 CORRECT 1 "Fmg_y +F_y = 0" Self-explanation Control WRITE-NFL-COMPO (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0) S0712 S0712-Feb15-11-39-09 2007-02-15 12:22:22.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the electric force on the electron at T0 due to an unspecified agent onto the y axis. 1 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:22:28.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 2 HINT Since the electric force on the electron at T0 due to an unspecified agent at T0 lies along the y axis, it has a non-zero component along that axis. 2 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:22:31.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:22:33.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 4 HINT Since the electric force on the electron at T0 due to an unspecified agent at T0 lies along the y axis and points in the + y direction, write the equation F_y = F. 4 4 Self-explanation Control COMPO-PARALLEL-AXIS 24 S0712 S0712-Feb15-11-39-09 2007-02-15 12:22:44.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 5 INCORRECT 2 "F-y = F" The variable y is not used in any solution I know of. 1 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:22:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 6 CORRECT 2 "F_y = F" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 Fe_ELECTRON_UNSPECIFIED_1) S0712 S0712-Feb15-11-39-09 2007-02-15 12:23:08.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 2 INCORRECT 3 "E" Unable to solve for E. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:23:11.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the weight force on the electron at T0 due to the earth onto the y axis. 1 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:23:14.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 2 HINT Since the weight force on the electron at T0 due to the earth at T0 lies along the y axis, it has a non-zero component along that axis. 2 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:23:16.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:23:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 4 HINT Since the weight force on the electron at T0 due to the earth at T0 lies along the y axis and points in the - y direction, write the equation Fmg_y = - Fmg. 4 4 Self-explanation Control COMPO-PARALLEL-AXIS 19 S0712 S0712-Feb15-11-39-09 2007-02-15 12:23:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 5 CORRECT 3 "Fmg_y=-Fmg" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1)) S0712 S0712-Feb15-11-39-09 2007-02-15 12:23:48.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 HINT Why don't you continue with the solution by working on applying the Weight law on the electron. 1 Self-explanation Control WT-LAW S0712 S0712-Feb15-11-39-09 2007-02-15 12:23:50.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 2 HINT Try applying the weight law. 2 Self-explanation Control WT-LAW S0712 S0712-Feb15-11-39-09 2007-02-15 12:23:52.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 3 HINT The weight law for a body is W=m*g, where W is the magnitude of the weight force acting on the body, m is the body's mass and g is the gravitational acceleration at the surface of the planet. 3 Self-explanation Control WT-LAW S0712 S0712-Feb15-11-39-09 2007-02-15 12:23:53.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 4 HINT Write Fmg=m*g 4 4 Self-explanation Control WT-LAW 14 S0712 S0712-Feb15-11-39-09 2007-02-15 12:24:02.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 5 CORRECT 4 "Fmg=m*g" Self-explanation Control WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0712 S0712-Feb15-11-39-09 2007-02-15 12:24:11.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C CALC_REQUEST 3 HINT You have completed all of the principle applications necessary to solve this problem. Right click in the first empty line in the equation pane and use 'Solve For...' to find a value for the sought quantity (if you have not already) and then enter that value in the answer box. 1 1 Self-explanation Control 9 S0712 S0712-Feb15-11-39-09 2007-02-15 12:24:20.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 4 CORRECT 5 "E" Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:24:38.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 INCORRECT Answer-1 "5057e11 N/C" Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:24:42.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 2 INCORRECT Answer-1 "5.57e11 N/C" Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:24:57.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 3 CORRECT Answer-1 "5.57e-11 N/C" Self-explanation Control 30 S0712 S0712-Feb15-11-39-09 2007-02-15 12:25:07.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C Unknown 1 HINT You have completed all of the principle applications necessary to solve this problem. Right click in the first empty line in the equation pane and use 'Solve For...' to find a value for the sought quantity (if you have not already) and then enter that value in the answer box. 1 1 Self-explanation Control 25 S0712 S0712-Feb15-11-39-09 2007-02-15 12:37:38.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 CORRECT System-1 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 S0712 S0712-Feb15-11-39-09 2007-02-15 12:37:55.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-2 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19C" Self-explanation Control DEFINE-CHARGE 19 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0712 S0712-Feb15-11-39-09 2007-02-15 12:38:14.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 INCORRECT Var-3 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.113-31 kg" Self-explanation Control DEFINE-MASS 17 (= m_ELECTRON (* (- 9.113 31) (DNUM 1 kg))) S0712 S0712-Feb15-11-39-09 2007-02-15 12:38:24.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 2 CORRECT Var-3 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 21 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0712 S0712-Feb15-11-39-09 2007-02-15 12:38:56.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-4 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=158 Self-explanation Control DRAW-FIELD-GIVEN-DIR 22 S0712 S0712-Feb15-11-39-09 2007-02-15 12:39:09.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 2 CORRECT Vector-4 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=158 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:39:36.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DRAW-AXES 0) 1 INCORRECT 0 "E=2.003=4 N/C" Syntax error in E=2.003=4 N/C 1 Self-explanation Control DRAW-UNROTATED-AXES 21 ? S0712 S0712-Feb15-11-39-09 2007-02-15 12:39:38.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (DRAW-AXES 0) 2 HINT Vector-2 label=F The equation or the units in it are not in a recognizable form. 2 Self-explanation Control DRAW-UNROTATED-AXES S0712 S0712-Feb15-11-39-09 2007-02-15 12:39:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (DRAW-AXES 0) 3 HINT Vector-2 label=F Though I can't tell exactly what the mistake is, a few common sources of errors are: (a) Unit symbols are case sensitive. (b) Multiplication always requires an explicit multiplication sign: W=m*g, NOT W=mg. (c) Units attach only to numbers, not to variables or expressions. 3 3 Self-explanation Control DRAW-UNROTATED-AXES S0712 S0712-Feb15-11-39-09 2007-02-15 12:39:39.0 US/Eastern DELETION ELEC* ELEC3A 0 Delete Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:40:43.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (DRAW-AXES 0) 4 HINT Vector-2 label=F It is now a good idea for you to draw an axis. This will help to ground your work and be useful later on in the process. 1 Self-explanation Control DRAW-UNROTATED-AXES S0712 S0712-Feb15-11-39-09 2007-02-15 12:40:55.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 5 CORRECT Axes-5 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 31 S0712 S0712-Feb15-11-39-09 2007-02-15 12:40:58.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 HINT You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the electric field at the region due to the plates. 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN S0712 S0712-Feb15-11-39-09 2007-02-15 12:41:02.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 2 HINT You can find the value of the magnitude of the electric field at the region due to the plates in the problem statement. 2 Self-explanation Control WRITE-KNOWN-VALUE-EQN S0712 S0712-Feb15-11-39-09 2007-02-15 12:41:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 3 HINT The value of the magnitude of the electric field at the region due to the plates is given as 20000.0 N/C. 3 Self-explanation Control WRITE-KNOWN-VALUE-EQN S0712 S0712-Feb15-11-39-09 2007-02-15 12:41:07.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 4 HINT Enter the equation E = 20000.0 N/C. 4 4 Self-explanation Control WRITE-KNOWN-VALUE-EQN 26 S0712 S0712-Feb15-11-39-09 2007-02-15 12:41:25.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 5 INCORRECT 0 "E=2.00e+4 N/c" Undefined variable: c 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN S0712 S0712-Feb15-11-39-09 2007-02-15 12:41:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 6 CORRECT 0 "E=2.00e+4 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 29 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0712 S0712-Feb15-11-39-09 2007-02-15 12:41:36.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Var-7 label=s You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:41:47.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Var-7 label=s Try introducing a variable for the magnitude of the displacement of the electron from T0 to T1. 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:41:50.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Var-7 label=s Notice that the electron is moving in a straight line from T0 to T1. 3 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:41:52.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Var-7 label=s Whenever an object is moving in a straight line over a time interval, it has a displacement which is parallel to the direction of motion. 4 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:41:53.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT Var-7 label=s Because the electron is moving in a straight line from T0 to T1, use the displacement tool to draw a displacement vector for it in direction 90 degrees 5 5 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 24 S0712 S0712-Feb15-11-39-09 2007-02-15 12:42:17.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 CORRECT Vector-6 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=116 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 25 S0712 S0712-Feb15-11-39-09 2007-02-15 12:42:20.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 HINT Why don't you continue working on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN S0712 S0712-Feb15-11-39-09 2007-02-15 12:42:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 2 HINT You can find the value of the magnitude of the displacement of the electron from T0 to T1 in the problem statement. 2 Self-explanation Control WRITE-KNOWN-VALUE-EQN S0712 S0712-Feb15-11-39-09 2007-02-15 12:42:26.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 3 HINT The value of the magnitude of the displacement of the electron from T0 to T1 is given as 0.015 m. 3 Self-explanation Control WRITE-KNOWN-VALUE-EQN S0712 S0712-Feb15-11-39-09 2007-02-15 12:42:27.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 4 HINT Enter the equation d = 0.015 m. 4 4 Self-explanation Control WRITE-KNOWN-VALUE-EQN 20 S0712 S0712-Feb15-11-39-09 2007-02-15 12:42:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 5 CORRECT 1 "d=1.50 cm" Self-explanation Control WRITE-KNOWN-VALUE-EQN 23 (= s_ELECTRON_12 (DNUM 1.5 cm)) S0712 S0712-Feb15-11-39-09 2007-02-15 12:43:01.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 HINT Vector-10 label=v0 Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:43:21.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 2 HINT #.(wb-quant '(define-variable "v" |average| |velocity| |electron| |T0 to T1| |NIL| NIL "") 'mag) That quantity is not mentioned in the Andes solution. 2 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:43:37.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 3 HINT #.(wb-quant '(define-variable "v" |instantaneous| |velocity| |electron| |T1| |NIL| NIL "") 'mag) Correct. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 3 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:44:10.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 4 HINT (avg-velocity ((?axis . y))) No principle applications of the type that you selected appear in the solution. What is the first principle application that you wish to work on? You should look for a principle that is related to the sought quantity indirectly. 4 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:44:23.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 5 HINT (avg-velocity ((?axis . y))) You have already tried that principle application. As I told you then it is wrong. In order to move ahead you need to try something that you have not tried before. Why don't you do that now. What is the first principle application that you wish to work on? You should look for a principle that is related to the sought quantity indirectly. 5 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:44:35.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 6 HINT (avg-velocity ((?axis . x))) No principle applications of the type that you selected appear in the solution. Lets just assume that you will work on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 6 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:44:36.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 7 HINT Your goal should be choosing a particular kinematic equation containing the y component of the velocity of the electron at T1. 7 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:44:37.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 8 HINT A good step would be drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 8 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:44:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 9 HINT Notice that the electron is momentarily at rest at T0. 9 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:44:40.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 10 HINT When an object is at rest even momentarily, its velocity at that moment is zero. 10 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 12:44:41.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 11 HINT Because the electron is at rest at T0, use the velocity tool to draw a zero-length velocity vector for it. 11 11 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST 18 S0712 S0712-Feb15-11-39-09 2007-02-15 12:44:41.0 US/Eastern DELETION ELEC* ELEC3A Vector-7 Delete label=NIL Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:45:19.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 12 CORRECT Vector-8 label="v";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST 19 S0712 S0712-Feb15-11-39-09 2007-02-15 12:45:21.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:45:29.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 HINT Try choosing a particular kinematic equation containing the y component of the velocity of the electron at T1. 2 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:45:32.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 3 HINT Your goal should be drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 3 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:45:33.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 4 HINT Notice that the electron is moving in a straight line at T1. 4 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:45:34.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 5 HINT Whenever an object is moving in a straight line, it has a velocity in the same direction as its motion. 5 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:45:35.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 6 HINT Because the electron is moving in a straight line at T1, draw a non-zero vector in direction 90 degrees. 6 6 Self-explanation Control DRAW-VELOCITY-STRAIGHT 14 S0712 S0712-Feb15-11-39-09 2007-02-15 12:45:35.0 US/Eastern DELETION ELEC* ELEC3A Vector-9 Delete label=NIL Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:45:35.0 US/Eastern DELETION ELEC* ELEC3A Vector-10 Delete label=NIL Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:47:25.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 7 INCORRECT 2 "v_y^2=v0_y^2+2*a_y*d_y" Undefined variables: (v0_y a_y) 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT 13 S0712 S0712-Feb15-11-39-09 2007-02-15 12:47:33.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 8 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:47:36.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 9 HINT Try choosing a particular kinematic equation containing the y component of the velocity of the electron at T1. 2 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:47:38.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 10 HINT Try drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 3 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:47:41.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 11 HINT Notice that the electron is moving in a straight line at T1. 4 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:47:43.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 12 HINT Whenever an object is moving in a straight line, it has a velocity in the same direction as its motion. 5 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:47:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 13 HINT Because the electron is moving in a straight line at T1, draw a non-zero vector in direction 90 degrees. 6 6 Self-explanation Control DRAW-VELOCITY-STRAIGHT 8 S0712 S0712-Feb15-11-39-09 2007-02-15 12:48:17.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 14 CORRECT Vector-11 label="v_Y";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=97 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 12:48:29.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 15 CORRECT Vector-11 label="v_y";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=97 Self-explanation Control DRAW-VELOCITY-STRAIGHT 9 S0712 S0712-Feb15-11-39-09 2007-02-15 12:48:33.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Self-explanation Control DRAW-ACCEL-SPEED-UP S0712 S0712-Feb15-11-39-09 2007-02-15 12:48:35.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Try choosing a particular kinematic equation containing the y component of the velocity of the electron at T1. 2 Self-explanation Control DRAW-ACCEL-SPEED-UP S0712 S0712-Feb15-11-39-09 2007-02-15 12:48:37.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT You should be drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 3 Self-explanation Control DRAW-ACCEL-SPEED-UP S0712 S0712-Feb15-11-39-09 2007-02-15 12:48:38.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Notice that the electron is moving in a straight line and speeding up from T0 to T1 4 Self-explanation Control DRAW-ACCEL-SPEED-UP S0712 S0712-Feb15-11-39-09 2007-02-15 12:48:40.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG MINILESSON ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT mini_speedup_accel.htm 5 5 Self-explanation Control DRAW-ACCEL-SPEED-UP S0712 S0712-Feb15-11-39-09 2007-02-15 12:48:45.0 US/Eastern HINT_REQUEST Choose- HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT close-lesson Do you wish for more hints? 6 Self-explanation Control DRAW-ACCEL-SPEED-UP S0712 S0712-Feb15-11-39-09 2007-02-15 12:48:53.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 INCORRECT 2 "v_y^2=v0_y^2+2*a_y*d_y" Undefined variables: (v0_y a_y) 1 Self-explanation Control DRAW-ACCEL-SPEED-UP 8 S0712 S0712-Feb15-11-39-09 2007-02-15 12:49:03.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Self-explanation Control DRAW-ACCEL-SPEED-UP S0712 S0712-Feb15-11-39-09 2007-02-15 12:49:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 HINT Your goal should be choosing a particular kinematic equation containing the y component of the velocity of the electron at T1. 2 Self-explanation Control DRAW-ACCEL-SPEED-UP S0712 S0712-Feb15-11-39-09 2007-02-15 12:49:08.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 10 HINT Try drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 3 Self-explanation Control DRAW-ACCEL-SPEED-UP S0712 S0712-Feb15-11-39-09 2007-02-15 12:49:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 11 HINT Notice that the electron is moving in a straight line and speeding up from T0 to T1 4 Self-explanation Control DRAW-ACCEL-SPEED-UP S0712 S0712-Feb15-11-39-09 2007-02-15 12:49:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG MINILESSON ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 12 HINT mini_speedup_accel.htm 5 5 Self-explanation Control DRAW-ACCEL-SPEED-UP S0712 S0712-Feb15-11-39-09 2007-02-15 12:49:14.0 US/Eastern HINT_REQUEST Choose- HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 13 HINT close-lesson Do you wish for more hints? 6 Self-explanation Control DRAW-ACCEL-SPEED-UP S0712 S0712-Feb15-11-39-09 2007-02-15 12:49:16.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 14 HINT Because the electron is speeding up while moving in a straight line with direction 90 degrees, you should use the acceleration tool to draw an acceleration for it from T0 to T1 at direction 90 degrees. 7 7 Self-explanation Control DRAW-ACCEL-SPEED-UP 3 S0712 S0712-Feb15-11-39-09 2007-02-15 12:49:34.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 15 CORRECT Vector-12 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=105 Self-explanation Control DRAW-ACCEL-SPEED-UP S0712 S0712-Feb15-11-39-09 2007-02-15 12:49:48.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 1 INCORRECT 2 "v_y^2=v0_y^2+2*a*d_y" Undefined variable: v0_y 1 Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:50:01.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 2 TRUE_BUT_IRRELEVANT 2 "v_y^2=v^2+2*a*d_y" Self-explanation Control (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) Yc_s_ELECTRON_12_0))) S0712 S0712-Feb15-11-39-09 2007-02-15 12:50:10.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 INCORRECT 3 "v_y" Unable to solve for v_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:50:14.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Self-explanation Control WRITE-LK-NO-T-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 12:50:16.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 2 HINT Try writing a constant acceleration equation in terms of vector components along the Y axis. 2 Self-explanation Control WRITE-LK-NO-T-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 12:50:20.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 3 HINT Do you know an equation relating the components of initial velocity, final velocity, acceleration, and displacement when acceleration is constant? 3 Self-explanation Control WRITE-LK-NO-T-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 12:50:21.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 4 HINT Write the equation v_y_y ^ 2 = 0 + (2 * a_y * d_y) 4 4 Self-explanation Control WRITE-LK-NO-T-COMPO -2 S0712 S0712-Feb15-11-39-09 2007-02-15 12:51:04.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 5 CORRECT 3 "v_y_y^2= 2*a_y*d_y" Self-explanation Control WRITE-LK-NO-T-COMPO 10 (= (^ Yc_v_ELECTRON_2_0 2) (* (* 2 Yc_a_ELECTRON_12_0) Yc_s_ELECTRON_12_0)) S0712 S0712-Feb15-11-39-09 2007-02-15 12:51:09.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Why don't you continue with the solution by working on applying Newton's second law to the electron from T0 to T1. 1 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0712 S0712-Feb15-11-39-09 2007-02-15 12:51:12.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT You should be drawing a free-body diagram for the electron from T0 to T1. 2 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0712 S0712-Feb15-11-39-09 2007-02-15 12:51:14.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT A good step would be drawing all the forces acting on the electron from T0 to T1. 3 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0712 S0712-Feb15-11-39-09 2007-02-15 12:51:15.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Think about how the direction of the electric force on the electron due to the plates is related to the direction of the electric field vector. 4 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:51:17.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 5 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:51:18.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT Because the charge of the electron is negative, use the force drawing tool (labeled F) to draw the electric force on the electron due to the plates in the opposite direction as the electric field at that location, namely 90 degrees. 6 6 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 5 S0712 S0712-Feb15-11-39-09 2007-02-15 12:51:46.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 INCORRECT Vector-13 label="Fe";type=Force;body=electron;agent=electron;forcetype=Electric;time=T0 to T1;dir=90;mag=163 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0712 S0712-Feb15-11-39-09 2007-02-15 12:51:49.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 HINT Vector-13 label=Fe A force arise from the interaction of two DIFFERENT objects, but you have used the electron for both. 1 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0712 S0712-Feb15-11-39-09 2007-02-15 12:51:58.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 HINT If you were trying to draw the net force on the electron, then double click on this force and look carefully at the dialog box. There is a button for defining the net force. 2 2 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0712 S0712-Feb15-11-39-09 2007-02-15 12:52:09.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 10 CORRECT Vector-13 label="Fe";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=90;mag=163 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0712 S0712-Feb15-11-39-09 2007-02-15 12:52:13.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Why don't you continue working on applying Newton's second law to the electron from T0 to T1. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:52:14.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Your goal should be drawing a free-body diagram for the electron from T0 to T1. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:52:15.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT A good step would be drawing all the forces acting on the electron from T0 to T1. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:52:17.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Think about how the direction of the electric force on the electron due to the plates is related to the direction of the electric field vector. 4 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:52:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 5 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:52:21.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT Because the charge of the electron is negative, use the force drawing tool (labeled F) to draw the electric force on the electron due to the plates in the opposite direction as the electric field at that location, namely 90 degrees. 6 6 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR -5 S0712 S0712-Feb15-11-39-09 2007-02-15 12:52:54.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 7 CORRECT Vector-13 label="Fe";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=163 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 12:52:57.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 1 HINT Why don't you continue working on applying Newton's second law to the electron from T0 to T1. 1 Self-explanation Control WRITE-NSL-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 12:52:59.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 2 HINT You can apply Newton's second law to the electron. Note that the electron is accelerating from T0 to T1. 2 Self-explanation Control WRITE-NSL-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 12:53:01.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 3 HINT Newton's second law F = m*a states that the net force on an object = the object's mass times its acceleration. Because the net force is the vector sum of all forces on the object, this can be applied component-wise to relate the sum of the force components in any direction to the mass times the component of acceleration in that direction. 3 Self-explanation Control WRITE-NSL-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 12:53:03.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 4 HINT Write Newton's second law in terms of component variables along the y axis as Fe_y = m * a_y 4 4 Self-explanation Control WRITE-NSL-COMPO -10 S0712 S0712-Feb15-11-39-09 2007-02-15 12:53:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 5 CORRECT 4 "Fe_y = m*a_y" Self-explanation Control WRITE-NSL-COMPO 2 (= Yc_Fe_ELECTRON_PLATES_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0)) S0712 S0712-Feb15-11-39-09 2007-02-15 12:53:32.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 2 CORRECT 5 "v" Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:53:38.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 HINT Why don't you continue with the solution by working on applying the definition of electric field magnitude at the electron from T0 to T1. 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0712 S0712-Feb15-11-39-09 2007-02-15 12:53:42.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 2 HINT What is the relationship between the force, the charge and the electric field? 2 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0712 S0712-Feb15-11-39-09 2007-02-15 12:53:43.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 3 HINT The electric field vector at a location is defined as electric force vector per unit charge. That is, the electric force vector that a test charge would undergo if placed there, divided by the size of the charge. This definition can be applied to relate force and field magnitudes. 3 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0712 S0712-Feb15-11-39-09 2007-02-15 12:53:52.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 4 HINT Write the equation Fe = (ABS q) * E 4 4 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG -3 S0712 S0712-Feb15-11-39-09 2007-02-15 12:54:12.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 5 CORRECT 6 "Fe=(abs q) *E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 9 (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES)) S0712 S0712-Feb15-11-39-09 2007-02-15 12:54:15.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the velocity of the electron at T1 onto the y axis. 1 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:54:17.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 2 HINT Since the velocity of the electron at T1 at T1 lies along the y axis, it has a non-zero component along that axis. 2 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:54:20.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:54:31.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 4 HINT Since the velocity of the electron at T1 at T1 lies along the y axis and points in the + y direction, write the equation v_y_y = v_y. 4 4 Self-explanation Control COMPO-PARALLEL-AXIS 4 S0712 S0712-Feb15-11-39-09 2007-02-15 12:54:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 5 CORRECT 7 "v_y_y = v_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_v_ELECTRON_2_0 v_ELECTRON_2) S0712 S0712-Feb15-11-39-09 2007-02-15 12:54:50.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 3 CORRECT 8 "v" Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:54:54.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the electric force on the electron from T0 to T1 due to the plates onto the y axis. 1 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:54:54.0 US/Eastern DELETION ELEC* ELEC3A 5 Delete Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:54:55.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 2 HINT Since the electric force on the electron from T0 to T1 due to the plates from T0 to T1 lies along the y axis, it has a non-zero component along that axis. 2 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:55:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:55:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 4 HINT Since the electric force on the electron from T0 to T1 due to the plates from T0 to T1 lies along the y axis and points in the + y direction, write the equation Fe_y = Fe. 4 4 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:55:23.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 5 CORRECT 8 "Fe_y = Fe" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_Fe_ELECTRON_PLATES_12_0 Fe_ELECTRON_PLATES_12) S0712 S0712-Feb15-11-39-09 2007-02-15 12:55:25.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the displacement of the electron from T0 to T1 onto the y axis. 1 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:55:28.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 2 HINT Since the displacement of the electron from T0 to T1 from T0 to T1 lies along the y axis, it has a non-zero component along that axis. 2 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:55:31.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 12:55:33.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 4 HINT Since the displacement of the electron from T0 to T1 from T0 to T1 lies along the y axis and points in the + y direction, write the equation d_y = d. 4 4 Self-explanation Control COMPO-PARALLEL-AXIS -2 S0712 S0712-Feb15-11-39-09 2007-02-15 12:55:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 5 CORRECT 9 "d_y = d" Self-explanation Control COMPO-PARALLEL-AXIS -1 (= Yc_s_ELECTRON_12_0 s_ELECTRON_12) S0712 S0712-Feb15-11-39-09 2007-02-15 12:55:49.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A CALC_REQUEST 4 HINT Var-4 label=se You have completed all of the principle applications necessary to solve this problem. Right click in the first empty line in the equation pane and use 'Solve For...' to find a value for the sought quantity (if you have not already) and then enter that value in the answer box. 1 1 Self-explanation Control -6 S0712 S0712-Feb15-11-39-09 2007-02-15 12:55:59.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 5 CORRECT 5 "v" Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:55:59.0 US/Eastern DELETION ELEC* ELEC3A 5 Delete Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:56:24.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 6 CORRECT 5 "v_y_y" Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 12:56:39.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.026e+7m/s" Self-explanation Control 18 S0712 S0712-Feb15-11-39-09 2007-02-15 13:10:40.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 S0712 S0712-Feb15-11-39-09 2007-02-15 13:10:55.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-668 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19C" Self-explanation Control DEFINE-CHARGE 19 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0712 S0712-Feb15-11-39-09 2007-02-15 13:11:15.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-669 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31kg" Self-explanation Control DEFINE-MASS 22 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0712 S0712-Feb15-11-39-09 2007-02-15 13:11:15.0 US/Eastern DELETION ELEC* ELEC6A Vector-670 Delete label=NIL Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:11:38.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-671 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 32 S0712 S0712-Feb15-11-39-09 2007-02-15 13:11:38.0 US/Eastern DELETION ELEC* ELEC6A Axes-672 Delete label=NIL Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:12:05.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-673 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=159 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0712 S0712-Feb15-11-39-09 2007-02-15 13:12:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 INCORRECT 0 "E=4.00e12N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN (= E_REGION_UNSPECIFIED (DNUM 4.0e+12 N/C)) S0712 S0712-Feb15-11-39-09 2007-02-15 13:12:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 2 CORRECT 0 "E=4.00e-12N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 36 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0712 S0712-Feb15-11-39-09 2007-02-15 13:12:56.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 INCORRECT Vector-674 label="v";type=Velocity;body=electron;agent=average;time=T0 to T1;dir=90;mag=93 Self-explanation Control DRAW-VELOCITY-STRAIGHT 35 S0712 S0712-Feb15-11-39-09 2007-02-15 13:13:00.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 2 HINT Vector-674 label=v You don't need to draw the velocity from T0 to T1. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:13:06.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 3 HINT If you click on 'explain more', I'll tell you a correct entry to make. However, you'd learn more if you figure it out yourself, perhaps with the aid of the light bulb button's hints. 2 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:13:11.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 4 HINT You should draw the velocity at T0. 3 3 Self-explanation Control DRAW-VELOCITY-STRAIGHT 30 S0712 S0712-Feb15-11-39-09 2007-02-15 13:13:31.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 5 CORRECT Vector-674 label="v";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=93 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:13:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 6 CORRECT Vector-674 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=93 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:13:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 1 "vi=4.30m/s" Self-explanation Control WRITE-KNOWN-VALUE-EQN 34 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0712 S0712-Feb15-11-39-09 2007-02-15 13:14:20.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-675 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0712 S0712-Feb15-11-39-09 2007-02-15 13:14:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 1 CORRECT 2 "vf=0m/s" Self-explanation Control WRITE-IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s)) S0712 S0712-Feb15-11-39-09 2007-02-15 13:15:08.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 HINT Vector-676 label=a Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0712 S0712-Feb15-11-39-09 2007-02-15 13:15:24.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 HINT #.(wb-quant '(define-variable "s" |NIL| |distance| |electron| |T0 to T1| |NIL| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. 2 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0712 S0712-Feb15-11-39-09 2007-02-15 13:15:32.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 3 HINT #.(wb-quant '(define-variable "s" |NIL| |distance| |electron| |T1| |NIL| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. 3 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0712 S0712-Feb15-11-39-09 2007-02-15 13:15:50.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 4 HINT #.(wb-quant '(define-variable "s" |NIL| |distance| |electron| |T0 to T1| |NIL| NIL "") 'NIL) In order to move ahead, you have to try selecting something that you haven't tried before. 4 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0712 S0712-Feb15-11-39-09 2007-02-15 13:15:53.0 US/Eastern CANCEL ELEC* ELEC6A Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:15:59.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 5 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0712 S0712-Feb15-11-39-09 2007-02-15 13:16:08.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 6 HINT #.(wb-quant '(define-variable "s" |NIL| |distance| |electron| |T1| |NIL| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. 2 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0712 S0712-Feb15-11-39-09 2007-02-15 13:16:22.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 7 HINT #.(wb-quant '(define-variable "d" |NIL| |displacement| |electron| |T0 to T1| |NIL| NIL "") 'mag) That's right. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 3 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0712 S0712-Feb15-11-39-09 2007-02-15 13:16:41.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 8 HINT (lk-no-vf ((?axis . y))) Right. A good step would be choosing a particular kinematic equation containing the y component of the displacement of the electron from T0 to T1. 4 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0712 S0712-Feb15-11-39-09 2007-02-15 13:16:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 9 HINT Try drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 5 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0712 S0712-Feb15-11-39-09 2007-02-15 13:16:49.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 10 HINT Notice that the electron is slowing down as it moves in a straight line from T0 to T1 6 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0712 S0712-Feb15-11-39-09 2007-02-15 13:16:53.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG MINILESSON ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 11 HINT mini_slowdown_accel.htm 7 7 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0712 S0712-Feb15-11-39-09 2007-02-15 13:16:57.0 US/Eastern HINT_REQUEST Choose- HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 12 HINT close-lesson Do you wish for more hints? 8 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0712 S0712-Feb15-11-39-09 2007-02-15 13:16:58.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 13 HINT Because the electron is slowing down as it moves in a straight line, draw an acceleration vector for it at from T0 to T1. It should have a direction of 270 degrees because that is the opposite direction from its motion. 9 9 Self-explanation Control DRAW-ACCEL-SLOW-DOWN 29 S0712 S0712-Feb15-11-39-09 2007-02-15 13:17:24.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 14 CORRECT Vector-676 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=166 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0712 S0712-Feb15-11-39-09 2007-02-15 13:17:32.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Vector-679 label=d Why don't you continue with the solution by working on writing the constant acceleration equation d_y = v0_y*t + 0.5*a_y*t^2 for the electron from T0 to T1. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:17:35.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Vector-679 label=d You should be choosing a particular kinematic equation containing the y component of the displacement of the electron from T0 to T1. 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:17:37.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Vector-679 label=d Your goal should be drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 3 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:17:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Vector-679 label=d Notice that the electron is moving in a straight line from T0 to T1. 4 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:17:40.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT Vector-679 label=d Whenever an object is moving in a straight line over a time interval, it has a displacement which is parallel to the direction of motion. 5 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:17:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT Vector-679 label=d Because the electron is moving in a straight line from T0 to T1, use the displacement tool to draw a displacement vector for it in direction 90 degrees 6 6 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 24 S0712 S0712-Feb15-11-39-09 2007-02-15 13:17:59.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 CORRECT Vector-677 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=173 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:18:26.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 HINT Vector-679 label=d Why don't you continue working on writing the constant acceleration equation d_y = v0_y*t + 0.5*a_y*t^2 for the electron from T0 to T1. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:18:27.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 HINT Vector-679 label=d A good step would be writing a constant acceleration equation in terms of vector components along the Y axis. 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:18:30.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 10 HINT Vector-679 label=d Try introducing a variable for the duration of the interval from T0 to T1. 3 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:18:31.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 11 HINT Vector-679 label=d Use the variable definition tool (under 'variable' on the top menu bar) to define a variable for the duration of from T0 to T1. 4 4 Self-explanation Control DEFINE-DURATION 19 S0712 S0712-Feb15-11-39-09 2007-02-15 13:19:24.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 12 INCORRECT Var-678 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:19:26.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 13 HINT Var-678 label=s The closest matching CORRECT entry seems to be done already, so you really don't need to generate it again. If you want to anyway, click on Explain more. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:19:30.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 14 HINT Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:19:33.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 15 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 3 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:19:35.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 16 HINT You should draw the displacement of the electron from T0 to T1. You can click on the light bulb button or 'explain further' for suggestions about how to solve the problem using it. 4 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:19:37.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 17 HINT Why don't you continue working on writing the constant acceleration equation d_y = v0_y*t + 0.5*a_y*t^2 for the electron from T0 to T1. 5 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:19:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 18 HINT Your goal should be writing a constant acceleration equation in terms of vector components along the Y axis. 6 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:19:46.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 19 HINT Your goal should be introducing a variable for the duration of the interval from T0 to T1. 7 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:19:48.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 20 HINT Use the variable definition tool (under 'variable' on the top menu bar) to define a variable for the duration of from T0 to T1. 8 8 Self-explanation Control DEFINE-DURATION 14 S0712 S0712-Feb15-11-39-09 2007-02-15 13:20:18.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 21 INCORRECT Var-678 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0712 S0712-Feb15-11-39-09 2007-02-15 13:20:18.0 US/Eastern DELETION ELEC* ELEC6A Var-678 Delete label=s Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:20:56.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (DURATION (DURING 1 2))) 1 CORRECT Var-679 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Self-explanation Control DEFINE-DURATION S0712 S0712-Feb15-11-39-09 2007-02-15 13:21:01.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 HINT 2 Why don't you continue working on writing the constant acceleration equation d_y = v0_y*t + 0.5*a_y*t^2 for the electron from T0 to T1. 1 Self-explanation Control WRITE-LK-NO-T-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 13:21:03.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 2 HINT 2 A good step would be writing a constant acceleration equation in terms of vector components along the Y axis. 2 Self-explanation Control WRITE-LK-NO-T-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 13:21:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 3 HINT 2 Do you know an equation relating the components of displacement to those of initial velocity, time, and acceleration when acceleration is constant? 3 Self-explanation Control WRITE-LK-NO-VF-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 13:21:06.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 4 HINT 2 Write the equation d_y = (vi_y * t) + (0.5 * a_y * (t ^ 2)) 4 4 Self-explanation Control WRITE-LK-NO-VF-COMPO 9 S0712 S0712-Feb15-11-39-09 2007-02-15 13:21:50.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 5 CORRECT 3 "d_y=(vi_y*t)+(0.5*a_y*(t^2))" Self-explanation Control WRITE-LK-NO-T-COMPO 21 (= Yc_s_ELECTRON_12_0 (+ (* Yc_v_ELECTRON_1_0 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0712 S0712-Feb15-11-39-09 2007-02-15 13:21:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 CORRECT 4 "vi_y = vi" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_v_ELECTRON_1_0 v_ELECTRON_1) S0712 S0712-Feb15-11-39-09 2007-02-15 13:22:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 6 INCORRECT 5 "a_y=a" Self-explanation Control 20 (= Yc_a_ELECTRON_12_0 a_ELECTRON_12) S0712 S0712-Feb15-11-39-09 2007-02-15 13:22:15.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 7 HINT 5 What equation do you wish to write? 1 Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:22:17.0 US/Eastern CANCEL ELEC* ELEC6A Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:22:17.0 US/Eastern DELETION ELEC* ELEC6A 5 Delete Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:22:24.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A CALC_REQUEST 1 HINT Why don't you continue working on writing the constant acceleration equation d_y = v0_y*t + 0.5*a_y*t^2 for the electron from T0 to T1. 1 Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:22:25.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A CALC_REQUEST 2 HINT Your goal should be writing a constant acceleration equation in terms of vector components along the Y axis. 2 Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:22:26.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A CALC_REQUEST 3 HINT Do you know an equation relating the components of displacement to those of initial velocity, time, and acceleration when acceleration is constant? 3 Self-explanation Control WRITE-LK-NO-VF-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 13:22:28.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A CALC_REQUEST 4 HINT Write the equation d_y = (vi_y * t) + (0.5 * a_y * (t ^ 2)) 4 4 Self-explanation Control WRITE-LK-NO-VF-COMPO 15 S0712 S0712-Feb15-11-39-09 2007-02-15 13:22:40.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A CALC_REQUEST 5 HINT Why don't you continue working on writing the constant acceleration equation d_y = v0_y*t + 0.5*a_y*t^2 for the electron from T0 to T1. 1 Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:22:53.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 6 INCORRECT 5 "d_y" Unable to solve for d_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:22:57.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 8 HINT Why don't you continue working on writing the constant acceleration equation d_y = v0_y*t + 0.5*a_y*t^2 for the electron from T0 to T1. 1 Self-explanation Control WRITE-LK-NO-T-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 13:23:00.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 9 HINT Your goal should be writing a constant acceleration equation in terms of vector components along the Y axis. 2 Self-explanation Control WRITE-LK-NO-T-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 13:23:01.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 10 HINT Do you know an equation relating the components of displacement to those of initial velocity, time, and acceleration when acceleration is constant? 3 Self-explanation Control WRITE-LK-NO-VF-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 13:23:03.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 11 HINT Write the equation d_y = (vi_y * t) + (0.5 * a_y * (t ^ 2)) 4 4 Self-explanation Control WRITE-LK-NO-VF-COMPO 10 S0712 S0712-Feb15-11-39-09 2007-02-15 13:24:09.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 12 INCORRECT 5 "d_y=*vi_y*t)=(0.5*a_y*(t^2))" Syntax error in d_y=*vi_y*t)=(0.5*a_y*(t^2)) 1 Self-explanation Control WRITE-LK-NO-T-COMPO ? S0712 S0712-Feb15-11-39-09 2007-02-15 13:24:19.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 13 INCORRECT 5 "d_y=(vi_y*t)=(0.5*a_y*(t^2))" Syntax error in d_y=(vi_y*t)=(0.5*a_y*(t^2)) 1 Self-explanation Control WRITE-LK-NO-T-COMPO ? S0712 S0712-Feb15-11-39-09 2007-02-15 13:24:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 14 CORRECT 5 "d_y=(vi_y*t)+(0.5*a_y*(t^2))" Self-explanation Control WRITE-LK-NO-T-COMPO (= Yc_s_ELECTRON_12_0 (+ (* Yc_v_ELECTRON_1_0 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0712 S0712-Feb15-11-39-09 2007-02-15 13:24:37.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 15 HINT Why don't you continue working on writing the constant acceleration equation d_y = v0_y*t + 0.5*a_y*t^2 for the electron from T0 to T1. 1 Self-explanation Control WRITE-LK-NO-T-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 13:24:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 16 HINT A good step would be writing a constant acceleration equation in terms of vector components along the Y axis. 2 Self-explanation Control WRITE-LK-NO-T-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 13:24:40.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 17 HINT Do you know an equation relating the components of displacement to those of initial velocity, time, and acceleration when acceleration is constant? 3 Self-explanation Control WRITE-LK-NO-VF-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 13:24:43.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 18 HINT Write the equation d_y = (vi_y * t) + (0.5 * a_y * (t ^ 2)) 4 4 Self-explanation Control WRITE-LK-NO-VF-COMPO 5 S0712 S0712-Feb15-11-39-09 2007-02-15 13:24:53.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 19 HINT Why don't you continue working on writing the constant acceleration equation d_y = v0_y*t + 0.5*a_y*t^2 for the electron from T0 to T1. 1 Self-explanation Control WRITE-LK-NO-T-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 13:24:56.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 20 HINT You should be writing a constant acceleration equation in terms of vector components along the Y axis. 2 Self-explanation Control WRITE-LK-NO-T-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 13:24:59.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 21 HINT Do you know an equation relating the components of displacement to those of initial velocity, time, and acceleration when acceleration is constant? 3 Self-explanation Control WRITE-LK-NO-VF-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 13:25:01.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 22 HINT Write the equation d_y = (vi_y * t) + (0.5 * a_y * (t ^ 2)) 4 4 Self-explanation Control WRITE-LK-NO-VF-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 13:25:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 23 CORRECT 5 "d_y=(vi_y*t)+(0.5*a_y*(t^2))" Self-explanation Control WRITE-LK-NO-T-COMPO (= Yc_s_ELECTRON_12_0 (+ (* Yc_v_ELECTRON_1_0 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0712 S0712-Feb15-11-39-09 2007-02-15 13:25:32.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 24 INCORRECT 6 "a_y=a" Self-explanation Control WRITE-LK-NO-T-COMPO (= Yc_a_ELECTRON_12_0 a_ELECTRON_12) S0712 S0712-Feb15-11-39-09 2007-02-15 13:25:32.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 25 INCORRECT 6 "a_y=a" Self-explanation Control WRITE-LK-NO-T-COMPO (= Yc_a_ELECTRON_12_0 a_ELECTRON_12) S0712 S0712-Feb15-11-39-09 2007-02-15 13:25:32.0 US/Eastern DELETION ELEC* ELEC6A 6 Delete Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:25:36.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 26 CORRECT 5 "d_y=(vi_y*t)+(0.5*a_y*(t^2))" Self-explanation Control WRITE-LK-NO-T-COMPO (= Yc_s_ELECTRON_12_0 (+ (* Yc_v_ELECTRON_1_0 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0712 S0712-Feb15-11-39-09 2007-02-15 13:25:36.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT ELEC* ELEC6A CALC_REQUEST 7 CORRECT 6 "d_y=(vi_y*t)+(0.5*a_y*(t^2))" Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:25:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 2 CORRECT 6 "d_y = (0.5 * a_y * (t ^ 2)) + ((4.3 m/s) * t)" Self-explanation Control WRITE-KNOWN-VALUE-EQN (= Yc_s_ELECTRON_12_0 (+ (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)) (* (DNUM 4.3 m/s) t_12))) S0712 S0712-Feb15-11-39-09 2007-02-15 13:25:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 2 CORRECT 6 "d_y = (0.5 * a_y * (t ^ 2)) + ((4.3 m/s) * t)" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_s_ELECTRON_12_0 (+ (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)) (* (DNUM 4.3 m/s) t_12))) S0712 S0712-Feb15-11-39-09 2007-02-15 13:25:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 27 CORRECT 6 "d_y = (0.5 * a_y * (t ^ 2)) + ((4.3 m/s) * t)" Self-explanation Control WRITE-LK-NO-T-COMPO (= Yc_s_ELECTRON_12_0 (+ (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)) (* (DNUM 4.3 m/s) t_12))) S0712 S0712-Feb15-11-39-09 2007-02-15 13:25:54.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 8 INCORRECT 7 "d_y" Unable to solve for d_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:25:57.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 HINT 7 Why don't you continue working on writing the constant acceleration equation d_y = v0_y*t + 0.5*a_y*t^2 for the electron from T0 to T1. 1 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 13:26:02.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 2 HINT 7 A good step would be writing a constant acceleration equation in terms of vector components along the Y axis. 2 Self-explanation Control COMPO-PARALLEL-AXIS S0712 S0712-Feb15-11-39-09 2007-02-15 13:26:02.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 3 HINT 7 Do you know an equation relating the components of displacement to those of initial velocity, time, and acceleration when acceleration is constant? 3 Self-explanation Control WRITE-LK-NO-VF-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 13:26:03.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 4 HINT 7 Write the equation d_y = (vi_y * t) + (0.5 * a_y * (t ^ 2)) 4 4 Self-explanation Control WRITE-LK-NO-VF-COMPO -5 S0712 S0712-Feb15-11-39-09 2007-02-15 13:27:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 5 CORRECT 7 "d_y=d" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_s_ELECTRON_12_0 s_ELECTRON_12) S0712 S0712-Feb15-11-39-09 2007-02-15 13:27:55.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 1 TRUE_BUT_IRRELEVANT 8 "a_y=-a" Self-explanation Control (= Yc_a_ELECTRON_12_0 (- a_ELECTRON_12)) S0712 S0712-Feb15-11-39-09 2007-02-15 13:28:13.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 9 INCORRECT 9 "d_y" Unable to solve for d_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:28:17.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 HINT 5 Why don't you continue working on writing the constant acceleration equation d_y = v0_y*t + 0.5*a_y*t^2 for the electron from T0 to T1. 1 Self-explanation Control DRAW-NET-FORCE-FROM-ACCEL S0712 S0712-Feb15-11-39-09 2007-02-15 13:28:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 HINT 5 Your goal should be writing a constant acceleration equation in terms of vector components along the Y axis. 2 Self-explanation Control DRAW-NET-FORCE-FROM-ACCEL S0712 S0712-Feb15-11-39-09 2007-02-15 13:28:21.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 3 HINT 5 Do you know an equation relating the components of displacement to those of initial velocity, time, and acceleration when acceleration is constant? 3 Self-explanation Control WRITE-LK-NO-VF-COMPO S0712 S0712-Feb15-11-39-09 2007-02-15 13:28:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 4 HINT 5 Write the equation d_y = (vi_y * t) + (0.5 * a_y * (t ^ 2)) 4 4 Self-explanation Control WRITE-LK-NO-VF-COMPO -10 S0712 S0712-Feb15-11-39-09 2007-02-15 13:28:22.0 US/Eastern DELETION ELEC* ELEC6A 6 Delete Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:29:12.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 5 INCORRECT Vector-680 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=90;mag=160 Self-explanation Control DRAW-NET-FORCE-FROM-ACCEL S0712 S0712-Feb15-11-39-09 2007-02-15 13:29:15.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 6 HINT Vector-680 label=F Do you really want the direction of that vector to be 90 degrees? 1 Self-explanation Control DRAW-NET-FORCE-FROM-ACCEL S0712 S0712-Feb15-11-39-09 2007-02-15 13:29:21.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 7 HINT 5 Draw the net force in the same direction as the acceleration. 2 2 Self-explanation Control DRAW-NET-FORCE-FROM-ACCEL -15 S0712 S0712-Feb15-11-39-09 2007-02-15 13:29:32.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 8 CORRECT Vector-680 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=270;mag=160 Self-explanation Control DRAW-NET-FORCE-FROM-ACCEL S0712 S0712-Feb15-11-39-09 2007-02-15 13:30:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 INCORRECT 6 "F=(absq)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fnet_ELECTRON_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0712 S0712-Feb15-11-39-09 2007-02-15 13:30:02.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 INCORRECT 6 "F=(abs q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fnet_ELECTRON_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0712 S0712-Feb15-11-39-09 2007-02-15 13:30:04.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A 6 1 HINT 6 Did you really mean to use F in this equation? F is defined as the magnitude of the net force on the electron from T0 to T1. 1 Self-explanation Control S0712 S0712-Feb15-11-39-09 2007-02-15 13:30:04.0 US/Eastern DELETION ELEC* ELEC6A 6 Delete Self-explanation Control S0713 S0713-Feb15-16-07-18 2007-02-15 16:15:21.0 US/Eastern DELETION FOR* FOR4C Axes-1 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-07-18 2007-02-15 16:15:55.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 1 CORRECT Axes-2 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 15 S0713 S0713-Feb15-16-07-18 2007-02-15 16:16:44.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 INCORRECT Vector-3 label="E";type=E-field;body=region;agent=particle;time=NIL;dir=22;mag=113 Self-explanation Control DRAW-FIELD-GIVEN-DIR 12 S0713 S0713-Feb15-16-07-18 2007-02-15 16:16:48.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 HINT Vector-3 label=E Is the particle the source of the electric field you are defining? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-07-18 2007-02-15 16:16:55.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 3 HINT A better choice (but maybe not the only one) would be the field due to an unspecified agent, not the particle 2 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR 8 S0713 S0713-Feb15-16-07-18 2007-02-15 16:17:09.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 4 CORRECT Vector-3 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=113 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-07-18 2007-02-15 16:17:49.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 CORRECT Var-4 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Self-explanation Control DEFINE-CHARGE 16 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0713 S0713-Feb15-16-07-18 2007-02-15 16:17:49.0 US/Eastern DELETION FOR* FOR4C Var-5 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-07-18 2007-02-15 16:18:51.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 5 CORRECT Vector-3 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=113 Self-explanation Control DRAW-FIELD-GIVEN-DIR 17 S0713 S0713-Feb15-16-07-18 2007-02-15 16:19:07.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 6 CORRECT Vector-3 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=113 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-07-18 2007-02-15 16:19:07.0 US/Eastern DELETION FOR* FOR4C Vector-6 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-07-18 2007-02-15 16:20:26.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=particle;forcetype=Electric;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 16 S0713 S0713-Feb15-16-07-18 2007-02-15 16:20:30.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT Vector-7 label=F A force arise from the interaction of two DIFFERENT objects, but you have used the particle for both. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-07-18 2007-02-15 16:20:42.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-07-18 2007-02-15 16:20:45.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 4 HINT Vector-7 label=F Do you really want that vector to have a zero magnitude? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-07-18 2007-02-15 16:20:53.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 5 HINT Vector-7 label=F Do you really want that vector to have a zero magnitude? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-07-18 2007-02-15 16:21:10.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 6 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 15 S0713 S0713-Feb15-16-21-58 2007-02-15 16:22:10.0 US/Eastern DELETION FOR* FOR4C Axes-1 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:22:10.0 US/Eastern DELETION FOR* FOR4C Axes-2 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:22:33.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 2 CORRECT Axes-3 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 15 S0713 S0713-Feb15-16-21-58 2007-02-15 16:22:44.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 7 CORRECT Vector-4 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=112 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 16:23:07.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 CORRECT Var-5 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Self-explanation Control DEFINE-CHARGE 22 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:23:07.0 US/Eastern DELETION FOR* FOR4C Vector-6 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:23:58.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 8 CORRECT Vector-4 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=112 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 16:24:32.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 7 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=0;mag=61 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 16:24:37.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 8 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=0;mag=61 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 21 S0713 S0713-Feb15-16-21-58 2007-02-15 16:24:39.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 9 HINT Vector-7 label=F Do you really want the direction of that vector to be 0 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 16:25:02.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 10 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=61 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 20 S0713 S0713-Feb15-16-21-58 2007-02-15 16:25:09.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 11 HINT Vector-7 label=F Do you really want the direction of that vector to be 22 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 16:25:10.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 12 HINT Think about how the direction of the electric force on the particle due to an unspecified agent is related to the direction of the electric field vector. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 16:25:44.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 13 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 16:26:33.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 14 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=-22;mag=61 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 16:26:58.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 15 CORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=61 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 16:27:39.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 9 CORRECT Vector-4 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=112 Self-explanation Control DRAW-FIELD-GIVEN-DIR 21 S0713 S0713-Feb15-16-21-58 2007-02-15 16:29:53.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 1 CORRECT 0 "F_x = q*E_x" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO 56 (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0)) S0713 S0713-Feb15-16-21-58 2007-02-15 16:31:59.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 1 CORRECT 1 "F_y = q*E_y" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0)) S0713 S0713-Feb15-16-21-58 2007-02-15 16:31:59.0 US/Eastern DELETION FOR* FOR4C Var-8 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:33:23.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 1 CORRECT 2 "E_x = E*cos($qE)" Self-explanation Control COMPO-GENERAL-CASE (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS OE_REGION_UNSPECIFIED))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:33:23.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (IMPLICIT-EQN (= OE_REGION_UNSPECIFIED (DNUM 22 deg))) 1 CORRECT 2 "E_x = E*cos($qE)" Self-explanation Control DRAW-FIELD-GIVEN-DIR (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS OE_REGION_UNSPECIFIED))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:33:40.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 1 CORRECT 3 "E_y = E*sin($qE)" Self-explanation Control COMPO-GENERAL-CASE (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN OE_REGION_UNSPECIFIED))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:33:40.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (IMPLICIT-EQN (= OE_REGION_UNSPECIFIED (DNUM 22 deg))) 2 CORRECT 3 "E_y = E*sin($qE)" Self-explanation Control DRAW-FIELD-GIVEN-DIR (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN OE_REGION_UNSPECIFIED))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:34:13.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 INCORRECT 4 "E_x = 14.3e+3 N/C*cos(22)" Self-explanation Control WRITE-KNOWN-VALUE-EQN (= Xc_E_REGION_UNSPECIFIED_0 (* (DNUM 14300.0 N/C) (COS 22))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:34:13.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 2 INCORRECT 4 "E_x = 14.3e+3 N/C*cos(22)" Self-explanation Control COMPO-GENERAL-CASE (= Xc_E_REGION_UNSPECIFIED_0 (* (DNUM 14300.0 N/C) (COS 22))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:34:16.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 3 HINT 4 Radians are the default unit for angles. 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN S0713 S0713-Feb15-16-21-58 2007-02-15 16:34:48.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 4 CORRECT 4 "E_x = 14.3e+3 N/C*cos(22 deg)" Self-explanation Control WRITE-KNOWN-VALUE-EQN 63 (= Xc_E_REGION_UNSPECIFIED_0 (* (DNUM 14300.0 N/C) (COS (DNUM 22 deg)))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:34:48.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 2 CORRECT 4 "E_x = 14.3e+3 N/C*cos(22 deg)" Self-explanation Control COMPO-GENERAL-CASE 63 (= Xc_E_REGION_UNSPECIFIED_0 (* (DNUM 14300.0 N/C) (COS (DNUM 22 deg)))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:35:07.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 5 CORRECT 5 "E_y = 14.3e+3 N/C*sin (22 deg)" Self-explanation Control WRITE-KNOWN-VALUE-EQN 64 (= Yc_E_REGION_UNSPECIFIED_0 (* (DNUM 14300.0 N/C) (SIN (DNUM 22 deg)))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:35:07.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 2 CORRECT 5 "E_y = 14.3e+3 N/C*sin (22 deg)" Self-explanation Control COMPO-GENERAL-CASE 64 (= Yc_E_REGION_UNSPECIFIED_0 (* (DNUM 14300.0 N/C) (SIN (DNUM 22 deg)))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:36:01.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 6 CORRECT 4 "E_x = 14.3e+3 N/C*cos(22 deg)" Self-explanation Control WRITE-KNOWN-VALUE-EQN (= Xc_E_REGION_UNSPECIFIED_0 (* (DNUM 14300.0 N/C) (COS (DNUM 22 deg)))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:36:01.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 3 CORRECT 4 "E_x = 14.3e+3 N/C*cos(22 deg)" Self-explanation Control COMPO-GENERAL-CASE (= Xc_E_REGION_UNSPECIFIED_0 (* (DNUM 14300.0 N/C) (COS (DNUM 22 deg)))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:36:01.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT = "E_x Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:36:04.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 7 CORRECT 5 "E_y = 14.3e+3 N/C*sin (22 deg)" Self-explanation Control WRITE-KNOWN-VALUE-EQN (= Yc_E_REGION_UNSPECIFIED_0 (* (DNUM 14300.0 N/C) (SIN (DNUM 22 deg)))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:36:04.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 3 CORRECT 5 "E_y = 14.3e+3 N/C*sin (22 deg)" Self-explanation Control COMPO-GENERAL-CASE (= Yc_E_REGION_UNSPECIFIED_0 (* (DNUM 14300.0 N/C) (SIN (DNUM 22 deg)))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:36:04.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT FOR* FOR4C CALC_REQUEST 2 CORRECT = "E_y Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:36:04.0 US/Eastern DELETION FOR* FOR4C 7 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:36:04.0 US/Eastern DELETION FOR* FOR4C 8 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:36:39.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 3 CORRECT 7 "E_x" Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:36:44.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 4 CORRECT 8 "E_y" Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:36:49.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 5 CORRECT 6 "F_x" Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:36:49.0 US/Eastern DELETION FOR* FOR4C 6 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:36:52.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 6 CORRECT 9 "F_y" Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:36:58.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 7 INCORRECT 10 "F" Unable to solve for F. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:37:46.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (SQRT (+ (^ Yc_Fe_PARTICLE_UNSPECIFIED_1_0 2) (^ Xc_Fe_PARTICLE_UNSPECIFIED_1_0 2))))) 1 INCORRECT 10 "(F_x)^2=(F_y)^2 = F^2" Syntax error in (F_x)^2=(F_y)^2 = F^2 1 Self-explanation Control WRITE-VECTOR-MAGNITUDE ? S0713 S0713-Feb15-16-21-58 2007-02-15 16:38:09.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (SQRT (+ (^ Yc_Fe_PARTICLE_UNSPECIFIED_1_0 2) (^ Xc_Fe_PARTICLE_UNSPECIFIED_1_0 2))))) 2 CORRECT 10 "(F_x)^2+(F_y)^2 = F^2" Self-explanation Control WRITE-VECTOR-MAGNITUDE (= (+ (^ Xc_Fe_PARTICLE_UNSPECIFIED_1_0 2) (^ Yc_Fe_PARTICLE_UNSPECIFIED_1_0 2)) (^ Fe_PARTICLE_UNSPECIFIED_1 2)) S0713 S0713-Feb15-16-21-58 2007-02-15 16:38:48.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C No Intepretation 1 TRUE_BUT_IRRELEVANT 11 "F = sqrt(F^2)" Self-explanation Control (= Fe_PARTICLE_UNSPECIFIED_1 (SQRT (^ Fe_PARTICLE_UNSPECIFIED_1 2))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:38:52.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 8 CORRECT 12 "F" Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:39:11.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 ".113 N" Self-explanation Control 88 S0713 S0713-Feb15-16-21-58 2007-02-15 16:47:42.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT 0 "a_y = -g" Undefined variable: a_y 1 Self-explanation Control DEFINE-CHARGE S0713 S0713-Feb15-16-21-58 2007-02-15 16:47:42.0 US/Eastern DELETION ELEC* ELEC1C 0 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:48:24.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-667 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Self-explanation Control DEFINE-CHARGE 9 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:48:41.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-668 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 18 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0713 S0713-Feb15-16-21-58 2007-02-15 16:48:59.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 1 INCORRECT 0 "F_y = 0" Undefined variable: F_y 1 Self-explanation Control DRAW-NET-FORCE-ZERO 17 S0713 S0713-Feb15-16-21-58 2007-02-15 16:48:59.0 US/Eastern DELETION ELEC* ELEC1C 0 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:49:35.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 2 INCORRECT Vector-669 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0;dir=270;mag=123 Self-explanation Control DRAW-NET-FORCE-ZERO 16 S0713 S0713-Feb15-16-21-58 2007-02-15 16:49:38.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 3 HINT Vector-669 label=F Are you sure that vector has a non-zero magnitude? 1 Self-explanation Control DRAW-NET-FORCE-ZERO S0713 S0713-Feb15-16-21-58 2007-02-15 16:49:48.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 4 HINT Vector-669 label=F Are you sure that vector has a non-zero magnitude? 1 Self-explanation Control DRAW-NET-FORCE-ZERO S0713 S0713-Feb15-16-21-58 2007-02-15 16:50:01.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 5 INCORRECT Vector-669 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0;dir=0;mag=123 Self-explanation Control DRAW-NET-FORCE-ZERO S0713 S0713-Feb15-16-21-58 2007-02-15 16:50:17.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 6 INCORRECT Vector-669 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0;dir=0;mag=123 Self-explanation Control DRAW-NET-FORCE-ZERO S0713 S0713-Feb15-16-21-58 2007-02-15 16:50:17.0 US/Eastern DELETION ELEC* ELEC1C Vector-669 Delete label=F Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:50:17.0 US/Eastern DELETION ELEC* ELEC1C Vector-670 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:51:00.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-671 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 27 S0713 S0713-Feb15-16-21-58 2007-02-15 16:51:43.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 7 CORRECT Vector-672 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-NET-FORCE-ZERO S0713 S0713-Feb15-16-21-58 2007-02-15 16:51:55.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C CALC_REQUEST 1 INCORRECT 0 "F_y = 0" Undefined variable: F_y 1 Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:51:55.0 US/Eastern DELETION ELEC* ELEC1C 0 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:52:38.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C CALC_REQUEST 2 INCORRECT 0 "F=m" Units are inconsistent. 1 1 Self-explanation Control 26 (= Fnet_ELECTRON_1 m_ELECTRON) S0713 S0713-Feb15-16-21-58 2007-02-15 16:52:38.0 US/Eastern DELETION ELEC* ELEC1C 0 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:54:07.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C CALC_REQUEST 3 INCORRECT 0 "E = kelec*abs(q)/r^2" Undefined variables: (E r) 1 Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:54:07.0 US/Eastern DELETION ELEC* ELEC1C 0 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:54:07.0 US/Eastern DELETION ELEC* ELEC1C Var-673 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:54:07.0 US/Eastern DELETION ELEC* ELEC1C Var-674 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:54:57.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 4 CORRECT 0 "F" Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:55:00.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 5 CORRECT 1 "g" Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:55:11.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 INCORRECT 0 "F=mg" Undefined variable: mg 1 Self-explanation Control WT-LAW S0713 S0713-Feb15-16-21-58 2007-02-15 16:55:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 2 INCORRECT 0 "F=m*g" Self-explanation Control WT-LAW (= Fnet_ELECTRON_1 (* m_ELECTRON g_EARTH)) S0713 S0713-Feb15-16-21-58 2007-02-15 16:55:29.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 8 INCORRECT 0 "F=m*-g" Self-explanation Control DRAW-NET-FORCE-ZERO (= Fnet_ELECTRON_1 (* m_ELECTRON (- g_EARTH))) S0713 S0713-Feb15-16-21-58 2007-02-15 16:55:29.0 US/Eastern DELETION ELEC* ELEC1C 0 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:55:29.0 US/Eastern DELETION ELEC* ELEC1C Vector-675 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:56:32.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 9 CORRECT Vector-672 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-NET-FORCE-ZERO S0713 S0713-Feb15-16-21-58 2007-02-15 16:56:59.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-676 label="Fe";type=Force;body=electron;agent=electron;forcetype=Electric;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 16:56:59.0 US/Eastern DELETION ELEC* ELEC1C Vector-676 Delete label=Fe Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:56:59.0 US/Eastern DELETION ELEC* ELEC1C Var-677 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:56:59.0 US/Eastern DELETION ELEC* ELEC1C Var-678 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:56:59.0 US/Eastern DELETION ELEC* ELEC1C Var-679 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:56:59.0 US/Eastern DELETION ELEC* ELEC1C Var-680 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:56:59.0 US/Eastern DELETION ELEC* ELEC1C Var-681 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:56:59.0 US/Eastern DELETION ELEC* ELEC1C Var-682 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:56:59.0 US/Eastern DELETION ELEC* ELEC1C Var-683 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:56:59.0 US/Eastern DELETION ELEC* ELEC1C Var-684 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 16:58:38.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 INCORRECT Vector-685 label="r";type=Position;body=electron;agent=region;time=T0;dir=0;mag=98 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 16:58:41.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 HINT Vector-685 label=r None of the solutions that I know include a relative position vector. Try clicking on the light bulb button or 'explain further' for suggestions about another approach. 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 16:58:41.0 US/Eastern DELETION ELEC* ELEC1C Vector-685 Delete label=r Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:00:21.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 INCORRECT Vector-686 label="E";type=E-field;body=region;agent=earth;time=NIL;dir=NIL;mag=0 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:00:22.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 HINT Vector-686 label=E Is the earth the source of the electric field you are defining? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:00:34.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 6 INCORRECT Vector-686 label="E";type=E-field;body=region;agent=electron;time=NIL;dir=NIL;mag=0 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:00:36.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 7 HINT Vector-686 label=E Is the electron the source of the electric field you are defining? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:00:42.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 8 INCORRECT Vector-686 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=NIL;mag=0 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:00:45.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 9 HINT Vector-686 label=E Do you really want that vector to have a zero magnitude? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:00:56.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 10 INCORRECT Vector-686 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=NIL;mag=0 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:00:56.0 US/Eastern DELETION ELEC* ELEC1C Vector-686 Delete label=E Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:01:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 11 INCORRECT Vector-687 label="E";type=E-field;body=region;agent=electron;time=NIL;dir=270;mag=81 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:01:13.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (DRAW-AXES 0) 1 HINT Vector-687 label=E Is the electron the source of the electric field you are defining? 1 Self-explanation Control DRAW-COMPO-FORM-AXES S0713 S0713-Feb15-16-21-58 2007-02-15 17:01:13.0 US/Eastern DELETION ELEC* ELEC1C Vector-687 Delete label=E Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:01:30.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (DRAW-AXES 0) 2 HINT It is now a good idea for you to draw an axis. This will help to ground your work and be useful later on in the process. 1 Self-explanation Control DRAW-COMPO-FORM-AXES S0713 S0713-Feb15-16-21-58 2007-02-15 17:01:43.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 3 CORRECT Axes-688 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-COMPO-FORM-AXES 36 S0713 S0713-Feb15-16-21-58 2007-02-15 17:01:43.0 US/Eastern DELETION ELEC* ELEC1C Vector-689 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:03:30.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 12 INCORRECT 0 "F = abs(q)*E" Undefined variable: E 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:03:30.0 US/Eastern DELETION ELEC* ELEC1C Var-690 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:03:30.0 US/Eastern DELETION ELEC* ELEC1C Var-691 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:03:47.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 13 HINT 0 Undefined variable: E 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:03:48.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 14 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR 31 S0713 S0713-Feb15-16-21-58 2007-02-15 17:03:58.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 15 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:04:00.0 US/Eastern CANCEL ELEC* ELEC1C Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:04:00.0 US/Eastern DELETION ELEC* ELEC1C 1 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:04:44.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 16 INCORRECT Vector-692 label="E";type=E-field;body=region;agent=earth;time=NIL;dir=NIL;mag=0 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:04:46.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 17 HINT Vector-692 label=E Is the earth the source of the electric field you are defining? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:04:52.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 18 INCORRECT Vector-692 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=NIL;mag=0 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:04:54.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 19 HINT Vector-692 label=E Do you really want that vector to have a zero magnitude? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:05:02.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 20 INCORRECT Vector-692 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=NIL;mag=0 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:05:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 21 CORRECT Vector-692 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=100 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:05:15.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (IMPLICIT-EQN (= Fnet_ELECTRON_1 (DNUM 0 N))) 1 HINT 0 Undefined variable: E 1 Self-explanation Control WRITE-IMPLICIT-EQN S0713 S0713-Feb15-16-21-58 2007-02-15 17:05:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (IMPLICIT-EQN (= Fnet_ELECTRON_1 (DNUM 0 N))) 2 INCORRECT 0 "F = abs(q)*E" Self-explanation Control WRITE-IMPLICIT-EQN (= Fnet_ELECTRON_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:05:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (IMPLICIT-EQN (= Fnet_ELECTRON_1 (DNUM 0 N))) 3 INCORRECT 0 "F = abs(q)*E" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:05:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (IMPLICIT-EQN (= Fnet_ELECTRON_1 (DNUM 0 N))) 4 INCORRECT 0 "F = abs(q)*E" Self-explanation Control WRITE-IMPLICIT-EQN (= Fnet_ELECTRON_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:05:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (IMPLICIT-EQN (= Fnet_ELECTRON_1 (DNUM 0 N))) 5 INCORRECT 0 "F = abs(q)*E" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:05:30.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT ELEC* ELEC1C CALC_REQUEST 6 INCORRECT = "F Only correct equations may be simplified. 1 1 Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:05:33.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (IMPLICIT-EQN (= Fnet_ELECTRON_1 (DNUM 0 N))) 6 HINT 0 You used E, which is the MAGNITUDE of the electric field at the region due to an unspecified agent. Is that what you intended? 1 Self-explanation Control WRITE-IMPLICIT-EQN S0713 S0713-Feb15-16-21-58 2007-02-15 17:05:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (IMPLICIT-EQN (= Fnet_ELECTRON_1 (DNUM 0 N))) 7 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Self-explanation Control WRITE-IMPLICIT-EQN 26 S0713 S0713-Feb15-16-21-58 2007-02-15 17:05:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (IMPLICIT-EQN (= Fnet_ELECTRON_1 (DNUM 0 N))) 8 CORRECT 0 "F = abs(q)*E_x" Self-explanation Control WRITE-IMPLICIT-EQN (= Fnet_ELECTRON_1 (* (ABS Q_ELECTRON) Xc_E_REGION_UNSPECIFIED_0)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:05:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (IMPLICIT-EQN (= Xc_E_REGION_UNSPECIFIED_0 0)) 1 CORRECT 0 "F = abs(q)*E_x" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_1 (* (ABS Q_ELECTRON) Xc_E_REGION_UNSPECIFIED_0)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:06:08.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (IMPLICIT-EQN (= Fnet_ELECTRON_1 (DNUM 0 N))) 9 CORRECT 0 "F = abs(q)*E_x" Self-explanation Control WRITE-IMPLICIT-EQN (= Fnet_ELECTRON_1 (* (ABS Q_ELECTRON) Xc_E_REGION_UNSPECIFIED_0)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:06:08.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (IMPLICIT-EQN (= Xc_E_REGION_UNSPECIFIED_0 0)) 2 CORRECT 0 "F = abs(q)*E_x" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_1 (* (ABS Q_ELECTRON) Xc_E_REGION_UNSPECIFIED_0)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:06:08.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT ELEC* ELEC1C CALC_REQUEST 7 CORRECT = "F Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:06:38.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (IMPLICIT-EQN (= Xc_E_REGION_UNSPECIFIED_0 0)) 3 CORRECT 2 "E_x = 0 N / 1.6e-19 C" Self-explanation Control COMPO-PARALLEL-AXIS (= Xc_E_REGION_UNSPECIFIED_0 (/ (DNUM 0 N) (DNUM 1.5999999999999998e-19 C))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:06:41.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (IMPLICIT-EQN (= Xc_E_REGION_UNSPECIFIED_0 0)) 4 CORRECT 2 "E_x = 0 N / 1.6e-19 C" Self-explanation Control COMPO-PARALLEL-AXIS (= Xc_E_REGION_UNSPECIFIED_0 (/ (DNUM 0 N) (DNUM 1.5999999999999998e-19 C))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:06:41.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT ELEC* ELEC1C CALC_REQUEST 8 CORRECT = "E_x Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:07:24.0 US/Eastern ATTEMPT Answer RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 3 INCORRECT Answer-1 "0.00 N 270 deg" Syntax error in E=0.00 N 270 deg 1 Self-explanation Control WT-LAW S0713 S0713-Feb15-16-21-58 2007-02-15 17:07:30.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 5 HINT The equation or the units in it are not in a recognizable form. 2 Self-explanation Control WT-LAW S0713 S0713-Feb15-16-21-58 2007-02-15 17:07:30.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 4 HINT Answer-1 label=0.00 N 270 deg Syntax error in E=0.00 N 270 deg 1 Self-explanation Control WT-LAW S0713 S0713-Feb15-16-21-58 2007-02-15 17:07:41.0 US/Eastern ATTEMPT Answer RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 6 INCORRECT Answer-1 "0.00 N " Units are inconsistent. 1 1 Self-explanation Control WT-LAW S0713 S0713-Feb15-16-21-58 2007-02-15 17:08:01.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 7 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control WT-LAW S0713 S0713-Feb15-16-21-58 2007-02-15 17:08:13.0 US/Eastern CANCEL ELEC* ELEC1C Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:08:19.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 8 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control WT-LAW S0713 S0713-Feb15-16-21-58 2007-02-15 17:08:33.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 9 HINT #.(wb-quant '(define-variable "E" |NIL| |E-field| |region| |NIL| |Unspecified| NIL "") 'mag) Right. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Self-explanation Control WT-LAW S0713 S0713-Feb15-16-21-58 2007-02-15 17:08:45.0 US/Eastern CANCEL ELEC* ELEC1C Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:09:11.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 10 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control WT-LAW S0713 S0713-Feb15-16-21-58 2007-02-15 17:09:25.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 11 HINT #.(wb-quant '(define-variable "E" |NIL| |E-field| |region| |NIL| |Unspecified| NIL "") 'mag) Good! What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Self-explanation Control WT-LAW S0713 S0713-Feb15-16-21-58 2007-02-15 17:09:37.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 12 HINT point-charge-efield-mag No principle applications of the type that you selected appear in the solution. What is the first principle application that you wish to work on? You should look for a principle that contains the sought quantity itself. 3 Self-explanation Control WT-LAW S0713 S0713-Feb15-16-21-58 2007-02-15 17:09:38.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 13 HINT point-charge-efield-mag You have already tried that principle application. As I told you then it is wrong. In order to move ahead you need to try something that you have not tried before. Why don't you do that now. What is the first principle application that you wish to work on? You should look for a principle that contains the sought quantity itself. 4 Self-explanation Control WT-LAW S0713 S0713-Feb15-16-21-58 2007-02-15 17:09:39.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 14 HINT point-charge-efield-mag You have already tried that principle application. As I told you then it is wrong. In order to move ahead you need to try something that you have not tried before. Why don't you do that now. What is the first principle application that you wish to work on? You should look for a principle that contains the sought quantity itself. 5 Self-explanation Control WT-LAW S0713 S0713-Feb15-16-21-58 2007-02-15 17:09:52.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 15 HINT charge-force-efield-mag Yes. Try introducing a variable for the magnitude of the electric force on the electron at T0 due to an unspecified agent. 6 Self-explanation Control WT-LAW S0713 S0713-Feb15-16-21-58 2007-02-15 17:10:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 16 INCORRECT 4 "E_x = E" Self-explanation Control WT-LAW (= Xc_E_REGION_UNSPECIFIED_0 E_REGION_UNSPECIFIED) S0713 S0713-Feb15-16-21-58 2007-02-15 17:10:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 17 INCORRECT 4 "F = m*g" Self-explanation Control WT-LAW (= Fnet_ELECTRON_1 (* m_ELECTRON g_EARTH)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:10:47.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 HINT 4 Did you really mean to use F in this equation? F is defined as the magnitude of the net force on the electron at T0. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:10:47.0 US/Eastern DELETION ELEC* ELEC1C 4 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:11:17.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 2 INCORRECT Vector-693 label="Fg";type=Force;body=electron;agent=earth;forcetype=Electric;time=T0;dir=270;mag=94 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:11:17.0 US/Eastern DELETION ELEC* ELEC1C Vector-693 Delete label=Fg Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:12:55.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 9 INCORRECT 4 "F_x" Unable to solve for F_x. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:12:59.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 3 HINT Why don't you continue with the solution by working on applying the definition of electric field magnitude at the electron at T0. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:13:06.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 4 HINT Your goal should be introducing a variable for the magnitude of the electric force on the electron at T0 due to an unspecified agent. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:13:51.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 5 INCORRECT Vector-694 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=270;mag=91 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:14:05.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 6 INCORRECT Vector-694 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=0;mag=91 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:14:07.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 7 HINT Vector-694 label=Fe Do you really want the direction of that vector to be 0 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:14:19.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 8 INCORRECT Vector-694 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=270;mag=91 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:14:24.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 9 INCORRECT Vector-694 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=270;mag=91 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:14:25.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 10 HINT Vector-694 label=Fe Do you really want the direction of that vector to be 270 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:14:38.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 11 CORRECT Vector-694 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=91 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:15:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 INCORRECT 4 "Fe = abs(q)*E_x" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) Xc_E_REGION_UNSPECIFIED_0)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:15:15.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 CORRECT 4 "Fe = abs(q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 61 (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:15:22.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 10 INCORRECT 5 "Fe" Unable to solve for Fe. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:15:29.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 3 HINT 0 Why don't you continue with the solution by working on writing the projection equation for the electric force on the electron at T0 due to an unspecified agent onto the y axis. 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0713 S0713-Feb15-16-21-58 2007-02-15 17:15:54.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 4 CORRECT 5 "E = Fe/abs(q)" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= E_REGION_UNSPECIFIED (/ Fe_ELECTRON_UNSPECIFIED_1 (ABS Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:15:58.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 11 INCORRECT 6 "E" Unable to solve for E. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:16:03.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 5 CORRECT 5 "E = Fe/abs(q)" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= E_REGION_UNSPECIFIED (/ Fe_ELECTRON_UNSPECIFIED_1 (ABS Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:16:03.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT ELEC* ELEC1C CALC_REQUEST 12 CORRECT = "E Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:16:13.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C No Intepretation 1 HINT Why don't you continue working on writing the projection equation for the electric force on the electron at T0 due to an unspecified agent onto the y axis. 1 Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:17:01.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C No Intepretation 2 TRUE_BUT_IRRELEVANT 7 "Fe_x = abs(q)*E_x" Self-explanation Control (= Xc_Fe_ELECTRON_UNSPECIFIED_1_0 (* (ABS Q_ELECTRON) Xc_E_REGION_UNSPECIFIED_0)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:17:16.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 INCORRECT 8 "Fe_y = abs(q)*E_Y" Undefined variable: E_Y 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO S0713 S0713-Feb15-16-21-58 2007-02-15 17:17:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 2 INCORRECT 8 "Fe_y = abs(q)*E_y" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* (ABS Q_ELECTRON) Yc_E_REGION_UNSPECIFIED_0)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:17:25.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 3 HINT 8 Think about the direction of the electric field at the region due to an unspecified agent. 1 Self-explanation Control COMPO-PARALLEL-AXIS S0713 S0713-Feb15-16-21-58 2007-02-15 17:17:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 4 CORRECT 8 "Fe_y = abs(q)*E" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:17:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 6 CORRECT 8 "Fe_y = abs(q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:17:55.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 13 INCORRECT 9 "Fe_y" Unable to solve for Fe_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:17:59.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 12 HINT Why don't you continue with the solution by working on calculating the net force acting on the electron 1. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:19:16.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 13 INCORRECT Vector-695 label="r";type=Position;body=electron;agent=earth;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:19:17.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 14 HINT Vector-695 label=r None of the solutions that I know include a relative position vector. Try clicking on the light bulb button or 'explain further' for suggestions about another approach. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:19:17.0 US/Eastern DELETION ELEC* ELEC1C Vector-695 Delete label=r Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:20:17.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 15 INCORRECT 9 "F_x = q*E_x" The variable F_x is not used in any solution I know of. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:20:36.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 16 HINT Why don't you continue working on calculating the net force acting on the electron 1. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:20:36.0 US/Eastern DELETION ELEC* ELEC1C 9 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:20:38.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 17 HINT You should be drawing all the forces acting on the electron at T0. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:20:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 18 HINT Notice that the electron is near the earth. 3 Self-explanation Control DRAW-WEIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:21:12.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 19 INCORRECT Vector-696 label="Fn";type=Force;body=electron;agent=Unspecified;forcetype=Normal;time=T0;dir=271;mag=111 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:21:17.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 20 INCORRECT Vector-696 label="Fn";type=Force;body=electron;agent=Unspecified;forcetype=Normal;time=T0;dir=90;mag=111 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:21:28.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 21 INCORRECT Vector-696 label="Fn";type=Force;body=electron;agent=Unspecified;forcetype=Normal;time=T0;dir=270;mag=111 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:21:30.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 HINT Vector-696 label=Fn The closest matching CORRECT entry seems to be done already, so you really don't need to generate it again. If you want to anyway, click on Explain more. 1 Self-explanation Control DRAW-WEIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:21:30.0 US/Eastern DELETION ELEC* ELEC1C Vector-696 Delete label=Fn Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:22:38.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 2 HINT Why don't you continue working on calculating the net force acting on the electron 1. 1 Self-explanation Control DRAW-WEIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:22:44.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 3 HINT Try drawing all the forces acting on the electron at T0. 2 Self-explanation Control DRAW-WEIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:22:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 4 HINT Notice that the electron is near the earth. 3 Self-explanation Control DRAW-WEIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:22:46.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 5 HINT When an object is near a planet, the planet exerts a weight force on the object. 4 Self-explanation Control DRAW-WEIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:23:01.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 6 INCORRECT 9 "W = m*g" Undefined variable: W 1 Self-explanation Control DRAW-WEIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:23:01.0 US/Eastern DELETION ELEC* ELEC1C 9 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:23:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 7 INCORRECT Vector-697 label="w";type=Force;body=electron;agent=earth;forcetype=Electric;time=T0;dir=270;mag=53 Self-explanation Control DRAW-WEIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:23:43.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 8 HINT Vector-697 label=w There is indeed a force on the electron due to the earth, but it is not a electric force. 1 Self-explanation Control DRAW-WEIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:23:58.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 9 CORRECT Vector-697 label="w";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=53 Self-explanation Control DRAW-WEIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:24:01.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 18 9 "" Self-explanation Control WT-LAW S0713 S0713-Feb15-16-21-58 2007-02-15 17:24:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 19 CORRECT 9 "w = m*g" Self-explanation Control WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:24:09.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 20 CORRECT 9 "w = m*g" Self-explanation Control WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:24:09.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT ELEC* ELEC1C CALC_REQUEST 14 CORRECT = "w Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:24:54.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 INCORRECT 11 "w= q*E" Self-explanation Control COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 (* Q_ELECTRON E_REGION_UNSPECIFIED)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:24:54.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 2 INCORRECT 11 "w= q*E" Self-explanation Control WRITE-NFL-COMPO (= Fw_ELECTRON_EARTH_1 (* Q_ELECTRON E_REGION_UNSPECIFIED)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:24:54.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 3 INCORRECT 11 "w= q*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO (= Fw_ELECTRON_EARTH_1 (* Q_ELECTRON E_REGION_UNSPECIFIED)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:24:54.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 4 INCORRECT 11 "w= q*E" Self-explanation Control COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 (* Q_ELECTRON E_REGION_UNSPECIFIED)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:24:56.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 5 HINT 11 Think about the direction of the electric field at the region due to an unspecified agent. 1 Self-explanation Control COMPO-ZERO-VECTOR S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 6 CORRECT 11 "w= q*-E" Self-explanation Control COMPO-ZERO-VECTOR (= Fw_ELECTRON_EARTH_1 (* Q_ELECTRON (- E_REGION_UNSPECIFIED))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 11 "w= q*-E" Self-explanation Control COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 (* Q_ELECTRON (- E_REGION_UNSPECIFIED))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 11 "w= q*-E" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fw_ELECTRON_EARTH_1 (* Q_ELECTRON (- E_REGION_UNSPECIFIED))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 5 CORRECT 11 "w= q*-E" Self-explanation Control COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 (* Q_ELECTRON (- E_REGION_UNSPECIFIED))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 7 CORRECT 11 "w= q*-E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fw_ELECTRON_EARTH_1 (* Q_ELECTRON (- E_REGION_UNSPECIFIED))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:09.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 7 CORRECT 11 "w= q*-E" Self-explanation Control COMPO-ZERO-VECTOR (= Fw_ELECTRON_EARTH_1 (* Q_ELECTRON (- E_REGION_UNSPECIFIED))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:09.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 2 CORRECT 11 "w= q*-E" Self-explanation Control COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 (* Q_ELECTRON (- E_REGION_UNSPECIFIED))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:09.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 2 CORRECT 11 "w= q*-E" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fw_ELECTRON_EARTH_1 (* Q_ELECTRON (- E_REGION_UNSPECIFIED))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:09.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 6 CORRECT 11 "w= q*-E" Self-explanation Control COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 (* Q_ELECTRON (- E_REGION_UNSPECIFIED))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:09.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 8 CORRECT 11 "w= q*-E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fw_ELECTRON_EARTH_1 (* Q_ELECTRON (- E_REGION_UNSPECIFIED))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:09.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT ELEC* ELEC1C CALC_REQUEST 15 CORRECT q*-E" "w= Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 8 CORRECT 13 "-E = w/q" Self-explanation Control COMPO-ZERO-VECTOR (= (- E_REGION_UNSPECIFIED) (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 3 CORRECT 13 "-E = w/q" Self-explanation Control COMPO-PARALLEL-AXIS (= (- E_REGION_UNSPECIFIED) (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 3 CORRECT 13 "-E = w/q" Self-explanation Control WRITE-NET-FORCE-COMPO (= (- E_REGION_UNSPECIFIED) (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 7 CORRECT 13 "-E = w/q" Self-explanation Control COMPO-PARALLEL-AXIS (= (- E_REGION_UNSPECIFIED) (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 9 CORRECT 13 "-E = w/q" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= (- E_REGION_UNSPECIFIED) (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 9 CORRECT 14 "E = -(w/q)" Self-explanation Control COMPO-ZERO-VECTOR 62 (= E_REGION_UNSPECIFIED (- (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 4 CORRECT 14 "E = -(w/q)" Self-explanation Control COMPO-PARALLEL-AXIS 62 (= E_REGION_UNSPECIFIED (- (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 4 CORRECT 14 "E = -(w/q)" Self-explanation Control WRITE-NET-FORCE-COMPO 62 (= E_REGION_UNSPECIFIED (- (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 8 CORRECT 14 "E = -(w/q)" Self-explanation Control COMPO-PARALLEL-AXIS 62 (= E_REGION_UNSPECIFIED (- (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 10 CORRECT 14 "E = -(w/q)" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 62 (= E_REGION_UNSPECIFIED (- (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:49.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT ELEC* ELEC1C CALC_REQUEST 16 CORRECT = "E Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 10 CORRECT 14 "E = -(w/q)" Self-explanation Control COMPO-ZERO-VECTOR (= E_REGION_UNSPECIFIED (- (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 5 CORRECT 14 "E = -(w/q)" Self-explanation Control COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (- (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 5 CORRECT 14 "E = -(w/q)" Self-explanation Control WRITE-NET-FORCE-COMPO (= E_REGION_UNSPECIFIED (- (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 9 CORRECT 14 "E = -(w/q)" Self-explanation Control COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (- (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:25:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 11 CORRECT 14 "E = -(w/q)" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= E_REGION_UNSPECIFIED (- (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:05.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 11 CORRECT 13 "-E = w/q" Self-explanation Control COMPO-ZERO-VECTOR (= (- E_REGION_UNSPECIFIED) (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:05.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 6 CORRECT 13 "-E = w/q" Self-explanation Control COMPO-PARALLEL-AXIS (= (- E_REGION_UNSPECIFIED) (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:05.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 6 CORRECT 13 "-E = w/q" Self-explanation Control WRITE-NET-FORCE-COMPO (= (- E_REGION_UNSPECIFIED) (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:05.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 10 CORRECT 13 "-E = w/q" Self-explanation Control COMPO-PARALLEL-AXIS (= (- E_REGION_UNSPECIFIED) (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:05.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 12 CORRECT 13 "-E = w/q" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= (- E_REGION_UNSPECIFIED) (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:05.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT ELEC* ELEC1C CALC_REQUEST 17 CORRECT = "-E Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:05.0 US/Eastern DELETION ELEC* ELEC1C 16 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:05.0 US/Eastern DELETION ELEC* ELEC1C 15 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 12 CORRECT 14 "E = -(w/q)" Self-explanation Control COMPO-ZERO-VECTOR (= E_REGION_UNSPECIFIED (- (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 7 CORRECT 14 "E = -(w/q)" Self-explanation Control COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (- (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 7 CORRECT 14 "E = -(w/q)" Self-explanation Control WRITE-NET-FORCE-COMPO (= E_REGION_UNSPECIFIED (- (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 11 CORRECT 14 "E = -(w/q)" Self-explanation Control COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (- (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 13 CORRECT 14 "E = -(w/q)" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= E_REGION_UNSPECIFIED (- (/ Fw_ELECTRON_EARTH_1 Q_ELECTRON))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:14.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT ELEC* ELEC1C CALC_REQUEST 18 CORRECT = "E Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:18.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 19 CORRECT 15 "E" Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:18.0 US/Eastern DELETION ELEC* ELEC1C 15 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:32.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 CORRECT Answer-1 "5.58e-11 N/C" Self-explanation Control 83 S0713 S0713-Feb15-16-21-58 2007-02-15 17:26:53.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 2 CORRECT Answer-1 "5.58e-11 N/C " Self-explanation Control 84 S0713 S0713-Feb15-16-21-58 2007-02-15 17:38:24.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-1 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 9 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:38:37.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-2 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Self-explanation Control DEFINE-CHARGE 12 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:39:24.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 INCORRECT Var-3 label="L";quant=length;subtype=NIL;body=plates;agent=NIL;time=NIL;value="1.50 cm" Self-explanation Control DRAW-VELOCITY-STRAIGHT 11 S0713 S0713-Feb15-16-21-58 2007-02-15 17:39:27.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 HINT Var-3 label=L Although you can always define a length variable, none are needed for any solution I know of this problem. 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:39:27.0 US/Eastern DELETION ELEC* ELEC3A Var-3 Delete label=L Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:40:01.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 3 INCORRECT Var-4 label="v";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T1;value="" Self-explanation Control DRAW-VELOCITY-STRAIGHT 10 S0713 S0713-Feb15-16-21-58 2007-02-15 17:40:03.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 4 HINT Var-4 label=v On this problem, you should use velocity instead of speed. 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:40:03.0 US/Eastern DELETION ELEC* ELEC3A Var-4 Delete label=v Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:40:03.0 US/Eastern DELETION ELEC* ELEC3A Var-5 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:40:47.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 5 CORRECT Vector-6 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=153 Self-explanation Control DRAW-VELOCITY-STRAIGHT 11 S0713 S0713-Feb15-16-21-58 2007-02-15 17:41:01.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 CORRECT Vector-7 label="vo";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0713 S0713-Feb15-16-21-58 2007-02-15 17:41:20.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-8 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T1;dir=90;mag=89 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES 10 S0713 S0713-Feb15-16-21-58 2007-02-15 17:41:22.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Vector-8 label=F You don't need to draw the net-force at T1. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0713 S0713-Feb15-16-21-58 2007-02-15 17:41:32.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 CORRECT Vector-8 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=90;mag=89 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES 11 S0713 S0713-Feb15-16-21-58 2007-02-15 17:41:56.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 INCORRECT 0 "F = abs(q)*E" Undefined variable: E 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR 10 S0713 S0713-Feb15-16-21-58 2007-02-15 17:42:11.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 2 INCORRECT 1 "E= 2.00e+4 N/C" Undefined variable: E 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:42:11.0 US/Eastern DELETION ELEC* ELEC3A Var-9 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:42:39.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 3 CORRECT Vector-10 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=98 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0713 S0713-Feb15-16-21-58 2007-02-15 17:42:43.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 1 "E= 2.00e+4 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 14 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:42:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 0 "F = abs(q)*E" Self-explanation Control (= Fnet_ELECTRON_12 (* (ABS Q_ELECTRON) E_REGION_PLATES)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:42:49.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 CORRECT 2 "F" Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:45:06.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 INCORRECT 4 "T0=0 s" Undefined variable: T0 1 Self-explanation Control DRAW-BODY S0713 S0713-Feb15-16-21-58 2007-02-15 17:45:25.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (BODY ELECTRON TIME NIL) 2 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Self-explanation Control DRAW-BODY S0713 S0713-Feb15-16-21-58 2007-02-15 17:45:25.0 US/Eastern DELETION ELEC* ELEC3A 4 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:45:33.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (BODY ELECTRON TIME NIL) 3 HINT You should use the body tool to draw a body choosing the electron as the body. 2 2 Self-explanation Control DRAW-BODY S0713 S0713-Feb15-16-21-58 2007-02-15 17:45:43.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 4 CORRECT System-11 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 24 S0713 S0713-Feb15-16-21-58 2007-02-15 17:46:01.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 2 INCORRECT 4 "v" Unable to solve for v. One thing you probably need is an equation specifying the given value of the magnitude of the displacement of the electron from T0 to T1. 1 1 Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:47:06.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-12 label="y";quant=length;subtype=NIL;body=electron;agent=NIL;time=NIL;value="1.50cm" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:47:12.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Var-12 label="y";quant=length;subtype=NIL;body=plates;agent=NIL;time=NIL;value="1.50cm" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:47:16.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Var-12 label=y Although you can always define a length variable, none are needed for any solution I know of this problem. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:47:25.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 INCORRECT Var-12 label="y";quant=length;subtype=NIL;body=plates;agent=NIL;time=NIL;value="1.50cm" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:47:39.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 INCORRECT Var-13 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.50cm" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 23 S0713 S0713-Feb15-16-21-58 2007-02-15 17:47:39.0 US/Eastern DELETION ELEC* ELEC3A Var-12 Delete label=y Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:47:43.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 1 HINT Var-13 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Self-explanation Control DEFINE-DURATION S0713 S0713-Feb15-16-21-58 2007-02-15 17:47:43.0 US/Eastern DELETION ELEC* ELEC3A Var-13 Delete label=s Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:48:15.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 2 CORRECT Var-14 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Self-explanation Control DEFINE-DURATION 24 S0713 S0713-Feb15-16-21-58 2007-02-15 17:48:50.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (DRAW-AXES 0) 1 HINT Vector-2 label=F It is now a good idea for you to draw an axis. This will help to ground your work and be useful later on in the process. 1 Self-explanation Control DRAW-UNROTATED-AXES S0713 S0713-Feb15-16-21-58 2007-02-15 17:48:57.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 2 CORRECT Axes-15 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 34 S0713 S0713-Feb15-16-21-58 2007-02-15 17:49:00.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:49:25.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 INCORRECT Var-16 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.50cm" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:49:29.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 HINT Var-16 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:49:29.0 US/Eastern DELETION ELEC* ELEC3A Var-16 Delete label=s Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:49:42.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 HINT Why don't you continue working on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:49:44.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 10 HINT Try introducing a variable for the magnitude of the displacement of the electron from T0 to T1. 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:49:46.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 11 HINT Notice that the electron is moving in a straight line from T0 to T1. 3 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:49:49.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 12 HINT Whenever an object is moving in a straight line over a time interval, it has a displacement which is parallel to the direction of motion. 4 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:49:52.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 13 HINT Because the electron is moving in a straight line from T0 to T1, use the displacement tool to draw a displacement vector for it in direction 90 degrees 5 5 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 29 S0713 S0713-Feb15-16-21-58 2007-02-15 17:50:03.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 14 CORRECT Vector-17 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=140 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0713 S0713-Feb15-16-21-58 2007-02-15 17:50:18.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 INCORRECT 3 "d = v0_y*t + .5*a+y*t^2" The variable y is not used in any solution I know of. 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN S0713 S0713-Feb15-16-21-58 2007-02-15 17:50:39.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 2 INCORRECT 3 "d = v0*t + .5*a*t^2" Undefined variables: (v0 a) 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN S0713 S0713-Feb15-16-21-58 2007-02-15 17:50:43.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 3 HINT Why don't you continue working on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN S0713 S0713-Feb15-16-21-58 2007-02-15 17:50:43.0 US/Eastern DELETION ELEC* ELEC3A 3 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:50:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 4 CORRECT 3 "d=1.50cm" Self-explanation Control WRITE-KNOWN-VALUE-EQN 32 (= s_ELECTRON_12 (DNUM 1.5 cm)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:51:06.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-ACCEL-SPEED-UP S0713 S0713-Feb15-16-21-58 2007-02-15 17:51:07.0 US/Eastern CANCEL ELEC* ELEC3A Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:51:29.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT 4 "v=s/t" Undefined variable: s 1 Self-explanation Control DRAW-ACCEL-SPEED-UP S0713 S0713-Feb15-16-21-58 2007-02-15 17:51:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT 4 "v=d/t" Self-explanation Control DRAW-ACCEL-SPEED-UP (= v_ELECTRON_2 (/ s_ELECTRON_12 t_12)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:51:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 INCORRECT 4 "v=d/t" Self-explanation Control DRAW-ACCEL-SPEED-UP (= v_ELECTRON_2 (/ s_ELECTRON_12 t_12)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:51:39.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT 4 What equation do you wish to write? 1 Self-explanation Control DRAW-ACCEL-SPEED-UP S0713 S0713-Feb15-16-21-58 2007-02-15 17:51:55.0 US/Eastern DELETION ELEC* ELEC3A 4 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:51:55.0 US/Eastern CANCEL ELEC* ELEC3A Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:52:41.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 INCORRECT Var-18 label="g";quant=gravitational-acceleration;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.8m/s" Self-explanation Control DRAW-ACCEL-SPEED-UP S0713 S0713-Feb15-16-21-58 2007-02-15 17:52:45.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 HINT Var-18 label=g Although you can always define a gravitational-acceleration variable, none are needed for any solution I know of this problem. 1 Self-explanation Control DRAW-ACCEL-SPEED-UP S0713 S0713-Feb15-16-21-58 2007-02-15 17:52:45.0 US/Eastern DELETION ELEC* ELEC3A 4 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:52:45.0 US/Eastern DELETION ELEC* ELEC3A Var-18 Delete label=g Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:52:45.0 US/Eastern DELETION ELEC* ELEC3A Var-19 Delete label=NIL Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:53:38.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 INCORRECT Vector-20 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T1;dir=90;mag=87 Self-explanation Control DRAW-ACCEL-SPEED-UP S0713 S0713-Feb15-16-21-58 2007-02-15 17:53:40.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 HINT Vector-20 label=a You don't need to draw the accel at T1. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-ACCEL-SPEED-UP S0713 S0713-Feb15-16-21-58 2007-02-15 17:53:58.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 10 CORRECT Vector-20 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=87 Self-explanation Control DRAW-ACCEL-SPEED-UP S0713 S0713-Feb15-16-21-58 2007-02-15 17:54:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 2 TRUE_BUT_IRRELEVANT 4 "a=v/t" Self-explanation Control (= a_ELECTRON_12 (/ v_ELECTRON_2 t_12)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:54:29.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 3 INCORRECT 5 "a" Unable to solve for a. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:54:38.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 4 INCORRECT 5 "v" Unable to solve for v. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:54:40.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A No Intepretation 3 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:54:41.0 US/Eastern CANCEL ELEC* ELEC3A Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:54:53.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 4 INCORRECT 5 "v=a/t" Units are inconsistent. 1 1 Self-explanation Control (= v_ELECTRON_2 (/ a_ELECTRON_12 t_12)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:54:58.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 5 INCORRECT 5 "v=t/a" Units are inconsistent. 1 1 Self-explanation Control (= v_ELECTRON_2 (/ t_12 a_ELECTRON_12)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:55:02.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 6 INCORRECT 5 "v=ta" Undefined variable: ta 1 Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:55:08.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 7 TRUE_BUT_IRRELEVANT 5 "v=t*a" Self-explanation Control (= v_ELECTRON_2 (* t_12 a_ELECTRON_12)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:55:11.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 8 TRUE_BUT_IRRELEVANT 5 "v=t*a" Self-explanation Control (= v_ELECTRON_2 (* t_12 a_ELECTRON_12)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:55:11.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT ELEC* ELEC3A CALC_REQUEST 5 CORRECT 6 "v=t*a" Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:55:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 9 TRUE_BUT_IRRELEVANT 6 "v = a * t" Self-explanation Control (= v_ELECTRON_2 (* a_ELECTRON_12 t_12)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:55:14.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT ELEC* ELEC3A CALC_REQUEST 6 INCORRECT = "v Unable to simplify v = a * t 1 1 Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:55:18.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 1 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control WRITE-IMPLICIT-EQN S0713 S0713-Feb15-16-21-58 2007-02-15 17:55:27.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 2 HINT #.(wb-quant '(define-variable "v" |average| |velocity| |electron| |T0 to T1| |NIL| NIL "") 'mag) That quantity is not mentioned in the Andes solution. 2 Self-explanation Control WRITE-IMPLICIT-EQN S0713 S0713-Feb15-16-21-58 2007-02-15 17:55:37.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 3 HINT #.(wb-quant '(define-variable "v" |instantaneous| |velocity| |electron| |T1| |NIL| NIL "") 'mag) Right indeed. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 3 Self-explanation Control WRITE-IMPLICIT-EQN S0713 S0713-Feb15-16-21-58 2007-02-15 17:55:53.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 4 HINT (lk-no-t ((?axis . y))) Yes. A good step would be writing a constant acceleration equation in terms of vector components along the Y axis. 4 Self-explanation Control WRITE-IMPLICIT-EQN S0713 S0713-Feb15-16-21-58 2007-02-15 17:57:01.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 5 INCORRECT 7 "v_y^2 = v0+y^2+2*a_y*d_y" The variable y is not used in any solution I know of. 1 Self-explanation Control WRITE-IMPLICIT-EQN S0713 S0713-Feb15-16-21-58 2007-02-15 17:57:10.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 6 HINT Why don't you continue with the solution by working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Self-explanation Control WRITE-IMPLICIT-EQN S0713 S0713-Feb15-16-21-58 2007-02-15 17:57:15.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 7 HINT You should be writing a constant acceleration equation in terms of vector components along the Y axis. 2 Self-explanation Control WRITE-IMPLICIT-EQN S0713 S0713-Feb15-16-21-58 2007-02-15 17:57:17.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 8 HINT Do you know an equation relating the components of initial velocity, final velocity, acceleration, and displacement when acceleration is constant? 3 Self-explanation Control WRITE-LK-NO-T-COMPO S0713 S0713-Feb15-16-21-58 2007-02-15 17:57:44.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 9 INCORRECT 7 "v^2 = v0+d^2+2*a*d" Undefined variable: v0 1 Self-explanation Control WRITE-IMPLICIT-EQN S0713 S0713-Feb15-16-21-58 2007-02-15 17:57:54.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 10 INCORRECT 8 "v0=0 s" Undefined variable: v0 1 Self-explanation Control WRITE-IMPLICIT-EQN S0713 S0713-Feb15-16-21-58 2007-02-15 17:58:04.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 11 CORRECT 8 "vo= 0" Self-explanation Control WRITE-IMPLICIT-EQN (= v_ELECTRON_1 0) S0713 S0713-Feb15-16-21-58 2007-02-15 17:58:07.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 10 INCORRECT 7 "v^2 = v0+d^2+2*a*d" Undefined variable: v0 1 Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:58:13.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 11 INCORRECT 7 "v^2 = vo+d^2+2*a*d" Units are inconsistent. 1 1 Self-explanation Control (= (^ v_ELECTRON_2 2) (+ (+ v_ELECTRON_1 (^ s_ELECTRON_12 2)) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:58:13.0 US/Eastern DELETION ELEC* ELEC3A 7 Delete Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:59:08.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 12 TRUE_BUT_IRRELEVANT 7 "v^2=vo^2+2*a*d" Self-explanation Control (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:59:10.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 13 TRUE_BUT_IRRELEVANT 7 "v^2=vo^2+2*a*d" Self-explanation Control (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0713 S0713-Feb15-16-21-58 2007-02-15 17:59:10.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT ELEC* ELEC3A CALC_REQUEST 7 CORRECT 9 "v^2=vo^2+2*a*d" Self-explanation Control S0713 S0713-Feb15-16-21-58 2007-02-15 17:59:30.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 11 CORRECT Vector-20 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=87 Self-explanation Control DRAW-ACCEL-SPEED-UP S0713 S0713-Feb15-16-21-58 2007-02-15 17:59:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 14 TRUE_BUT_IRRELEVANT 4 "a=v/t" Self-explanation Control (= a_ELECTRON_12 (/ v_ELECTRON_2 t_12)) S0713 S0713-Feb15-16-21-58 2007-02-15 17:59:44.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT ELEC* ELEC3A CALC_REQUEST 8 CORRECT 10 "a=v/t" Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:13:49.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 CORRECT Var-1 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9 e-6 C" Self-explanation Control DEFINE-CHARGE 12 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0714 S0714-Feb16-10-05-30 2007-02-16 10:13:49.0 US/Eastern DELETION FOR* FOR4C System-2 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:13:49.0 US/Eastern DELETION FOR* FOR4C Vector-3 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:16:40.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 CORRECT Vector-4 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=185 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 10:16:59.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 CORRECT Vector-4 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=185 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 10:17:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 INCORRECT 0 "E= 14.3e N/C" Syntax error in E= 14.3e N/C 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN 11 ? S0714 S0714-Feb16-10-05-30 2007-02-16 10:17:15.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 2 HINT The equation or the units in it are not in a recognizable form. 2 Self-explanation Control WRITE-KNOWN-VALUE-EQN S0714 S0714-Feb16-10-05-30 2007-02-16 10:17:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 3 HINT Though I can't tell exactly what the mistake is, a few common sources of errors are: (a) Unit symbols are case sensitive. (b) Multiplication always requires an explicit multiplication sign: W=m*g, NOT W=mg. (c) Units attach only to numbers, not to variables or expressions. 3 3 Self-explanation Control WRITE-KNOWN-VALUE-EQN S0714 S0714-Feb16-10-05-30 2007-02-16 10:17:38.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 4 CORRECT 0 "E= 14.3e+3 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 19 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:18:37.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (BODY PARTICLE TIME NIL) 1 INCORRECT 1 "F=E*q" Undefined variable: F 1 Self-explanation Control DRAW-BODY 18 S0714 S0714-Feb16-10-05-30 2007-02-16 10:19:05.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 2 CORRECT System-5 label="q";body=particle;time=NIL Self-explanation Control DRAW-BODY 29 S0714 S0714-Feb16-10-05-30 2007-02-16 10:19:51.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 1 INCORRECT Vector-6 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=90;mag=97 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES 28 S0714 S0714-Feb16-10-05-30 2007-02-16 10:19:55.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 1 INCORRECT 1 "F=E*q" Self-explanation Control COMPO-GENERAL-CASE (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:19:55.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 1 INCORRECT 1 "F=E*q" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:19:55.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= (+ Yc_Fe_PARTICLE_UNSPECIFIED_1_0) Yc_Fnet_PARTICLE_1_0)) 1 INCORRECT 1 "F=E*q" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:19:55.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fnet_PARTICLE_1_0 (* Fnet_PARTICLE_1 (SIN (- (DNUM 202 deg) (DNUM 0 deg)))))) 1 INCORRECT 1 "F=E*q" Self-explanation Control COMPO-GENERAL-CASE (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:20:56.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 2 INCORRECT 1 "F=E*q" Self-explanation Control COMPO-GENERAL-CASE (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:20:56.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 2 INCORRECT 1 "F=E*q" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:20:56.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= (+ Yc_Fe_PARTICLE_UNSPECIFIED_1_0) Yc_Fnet_PARTICLE_1_0)) 2 INCORRECT 1 "F=E*q" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:20:56.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fnet_PARTICLE_1_0 (* Fnet_PARTICLE_1 (SIN (- (DNUM 202 deg) (DNUM 0 deg)))))) 2 INCORRECT 1 "F=E*q" Self-explanation Control COMPO-GENERAL-CASE (= Fnet_PARTICLE_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:21:04.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 HINT Vector-6 label=F Do you really want the direction of that vector to be 90 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 10:21:07.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT Since the forces acting on the particle at T0 are all pointing in the same direction, the direction of the total force is known. 2 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0714 S0714-Feb16-10-05-30 2007-02-16 10:21:11.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 HINT Draw a non-zero net force vector for the particle at T0 at 202 degrees. 3 3 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES 22 S0714 S0714-Feb16-10-05-30 2007-02-16 10:21:11.0 US/Eastern DELETION FOR* FOR4C Vector-6 Delete label=F Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:21:52.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 4 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=0;mag=38 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 10:21:55.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 INCORRECT 1 "F=E*q" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:22:07.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 5 CORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=38 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 10:22:10.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 2 INCORRECT 1 "F=E*q" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:22:13.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 3 INCORRECT 1 "F=E*q" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:22:28.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 4 INCORRECT 1 "F=E*q" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:22:29.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 5 INCORRECT 1 "F=E*q" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:22:40.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 6 HINT 1 Normally, this equation is written using an absolute value. 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0714 S0714-Feb16-10-05-30 2007-02-16 10:22:44.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 7 HINT Writing the equation using an absolute value will lessen the chance that you make a sign error. 2 2 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 17 S0714 S0714-Feb16-10-05-30 2007-02-16 10:23:16.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 8 CORRECT 1 "F=E*abs(q)" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 52 (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED (ABS Q_PARTICLE))) S0714 S0714-Feb16-10-05-30 2007-02-16 10:23:16.0 US/Eastern DELETION FOR* FOR4C Var-8 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:24:57.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 2 "F" Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:25:17.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 "0.1130 N" Self-explanation Control 77 S0714 S0714-Feb16-10-05-30 2007-02-16 10:36:49.0 US/Eastern DELETION ELEC* ELEC1C Axes-667 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:37:34.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT Var-668 label="q";quant=charge-on;subtype=NIL;body=earth;agent=NIL;time=NIL;value="-1.60 e-19 C" Self-explanation Control DEFINE-CHARGE S0714 S0714-Feb16-10-05-30 2007-02-16 10:37:36.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 HINT Var-668 label=q Are you sure you want to choose the earth? 1 Self-explanation Control DEFINE-CHARGE S0714 S0714-Feb16-10-05-30 2007-02-16 10:37:40.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 3 HINT Perhaps you should choose the electron instead. 2 2 Self-explanation Control DEFINE-CHARGE -5 S0714 S0714-Feb16-10-05-30 2007-02-16 10:37:47.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 4 CORRECT Var-668 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60 e-19 C" Self-explanation Control DEFINE-CHARGE 5 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0714 S0714-Feb16-10-05-30 2007-02-16 10:38:06.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-669 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 13 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:38:35.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-670 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-COMPO-FORM-AXES 24 S0714 S0714-Feb16-10-05-30 2007-02-16 10:38:40.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 2 CORRECT Axes-670 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-COMPO-FORM-AXES S0714 S0714-Feb16-10-05-30 2007-02-16 10:38:52.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 INCORRECT System-671 label="earth";body=earth;time=NIL Self-explanation Control DRAW-BODY 23 S0714 S0714-Feb16-10-05-30 2007-02-16 10:38:52.0 US/Eastern DELETION ELEC* ELEC1C Vector-672 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:38:52.0 US/Eastern DELETION ELEC* ELEC1C Vector-673 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:39:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-674 label="E";type=E-field;body=region;agent=electron;time=NIL;dir=90;mag=26 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 10:39:43.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 HINT Vector-674 label=E Is the electron the source of the electric field you are defining? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 10:39:57.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 INCORRECT Vector-674 label="E";type=E-field;body=region;agent=earth;time=NIL;dir=90;mag=26 Self-explanation Control DRAW-FIELD-GIVEN-DIR 22 S0714 S0714-Feb16-10-05-30 2007-02-16 10:40:02.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 HINT Vector-674 label=E Is the earth the source of the electric field you are defining? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 10:40:04.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 HINT A better choice (but maybe not the only one) would be the field due to an unspecified agent, not the earth 2 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR 18 S0714 S0714-Feb16-10-05-30 2007-02-16 10:40:20.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 6 INCORRECT Vector-674 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=90;mag=26 Self-explanation Control DRAW-FIELD-GIVEN-DIR 17 S0714 S0714-Feb16-10-05-30 2007-02-16 10:40:25.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 7 HINT Vector-674 label=E Do you really want the direction of that vector to be 90 degrees? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 10:40:27.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 8 HINT You can determine the direction of the electric field at the region due to an unspecified agent from the problem statement 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 10:40:48.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 9 HINT Use the electric field drawing tool to draw the electric field at the region due to an unspecified agent in the given direction of 270 degrees. 3 3 Self-explanation Control DRAW-FIELD-GIVEN-DIR 12 S0714 S0714-Feb16-10-05-30 2007-02-16 10:40:48.0 US/Eastern DELETION ELEC* ELEC1C Vector-674 Delete label=E Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:41:19.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 10 INCORRECT Vector-675 label="E";type=E-field;body=region;agent=earth;time=NIL;dir=270;mag=34 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 10:41:22.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 11 HINT Vector-675 label=E Is the earth the source of the electric field you are defining? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 10:41:32.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 12 CORRECT Vector-675 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=34 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 10:42:44.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 2 CORRECT System-676 label="electron";body=electron;time=NIL Self-explanation Control DRAW-BODY 22 S0714 S0714-Feb16-10-05-30 2007-02-16 10:43:28.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 CORRECT Vector-677 label="F";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=29 Self-explanation Control DRAW-WEIGHT 23 S0714 S0714-Feb16-10-05-30 2007-02-16 10:43:37.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 INCORRECT 0 "F=mg" Undefined variable: mg 1 Self-explanation Control WT-LAW 22 S0714 S0714-Feb16-10-05-30 2007-02-16 10:43:47.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 2 CORRECT 0 "F=m*g" Self-explanation Control WT-LAW 23 (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:44:02.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 1 "F=abs(q)*E" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control COMPO-PARALLEL-AXIS 43 (= Fw_ELECTRON_EARTH_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:44:02.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 1 CORRECT 1 "F=abs(q)*E" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control WRITE-NFL-COMPO 43 (= Fw_ELECTRON_EARTH_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:44:02.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 1 CORRECT 1 "F=abs(q)*E" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO 43 (= Fw_ELECTRON_EARTH_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:44:02.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 1 CORRECT 1 "F=abs(q)*E" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control COMPO-PARALLEL-AXIS 43 (= Fw_ELECTRON_EARTH_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:44:20.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C CALC_REQUEST 1 HINT It is good practice to identify the fundamental principles you are using by writing them purely symbolically in standard form before combining them with other equations or given values. Select "Review Physics Equations" on the Help Menu to view a list of principles and their standard forms. 2 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:44:34.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C CALC_REQUEST 2 HINT A good solution would include Newton's second law and the definition of electric field, written as separate equations. 3 3 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:44:50.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 3 INCORRECT 2 "F_x" Unable to solve for F_x. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:44:59.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C CALC_REQUEST 4 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:45:06.0 US/Eastern CANCEL ELEC* ELEC1C Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:45:22.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 5 CORRECT 2 "F" Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:45:58.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C (IMPLICIT-EQN (= Xc_Fw_ELECTRON_EARTH_1_0 0)) 1 INCORRECT Answer-1 "-8.928e-30 N/C" Self-explanation Control COMPO-PARALLEL-AXIS S0714 S0714-Feb16-10-05-30 2007-02-16 10:46:02.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (IMPLICIT-EQN (= Xc_Fw_ELECTRON_EARTH_1_0 0)) 2 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control COMPO-PARALLEL-AXIS S0714 S0714-Feb16-10-05-30 2007-02-16 10:46:37.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC1C (IMPLICIT-EQN (= Xc_Fw_ELECTRON_EARTH_1_0 0)) 3 HINT #.(wb-quant '(define-variable "q" |NIL| |charge-on| |electron| |NIL| |NIL| NIL "") 'NIL) That quantity is not sought by the problem statement. 2 Self-explanation Control COMPO-PARALLEL-AXIS S0714 S0714-Feb16-10-05-30 2007-02-16 10:46:42.0 US/Eastern CANCEL ELEC* ELEC1C Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:47:00.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C (IMPLICIT-EQN (= Xc_Fw_ELECTRON_EARTH_1_0 0)) 4 INCORRECT Answer-1 "-8.928e-30 N/C" Self-explanation Control COMPO-PARALLEL-AXIS S0714 S0714-Feb16-10-05-30 2007-02-16 10:47:00.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C (IMPLICIT-EQN (= Xc_Fw_ELECTRON_EARTH_1_0 0)) 5 INCORRECT Answer-1 "-8.928e-30 N/C" Self-explanation Control COMPO-PARALLEL-AXIS S0714 S0714-Feb16-10-05-30 2007-02-16 10:47:03.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (IMPLICIT-EQN (= Xc_Fw_ELECTRON_EARTH_1_0 0)) 6 HINT Answer-1 label=-8.928e-30 N/C - (8.927999999999999e-30 N/C) is not the correct value for the magnitude of the electric field at the region due to an unspecified agent. When you have entered enough equations, ask Andes to solve for E, then transfer the result to this answer box. 1 1 Self-explanation Control COMPO-PARALLEL-AXIS 38 S0714 S0714-Feb16-10-05-30 2007-02-16 10:47:38.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (IMPLICIT-EQN (= Xc_Fw_ELECTRON_EARTH_1_0 0)) 7 CORRECT 3 "F_x=abs(q)*E_x" Self-explanation Control COMPO-PARALLEL-AXIS (= Xc_Fw_ELECTRON_EARTH_1_0 (* (ABS Q_ELECTRON) Xc_E_REGION_UNSPECIFIED_0)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:47:38.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (IMPLICIT-EQN (= Xc_E_REGION_UNSPECIFIED_0 0)) 1 CORRECT 3 "F_x=abs(q)*E_x" Self-explanation Control COMPO-PARALLEL-AXIS (= Xc_Fw_ELECTRON_EARTH_1_0 (* (ABS Q_ELECTRON) Xc_E_REGION_UNSPECIFIED_0)) S0714 S0714-Feb16-10-05-30 2007-02-16 10:47:44.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 6 INCORRECT 4 "E_x" Unable to solve for E_x. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:47:55.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C CALC_REQUEST 7 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:48:21.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC1C CALC_REQUEST 8 HINT #.(wb-quant '(define-variable "V" |NIL| |potential| |region| |T0| |all sources| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. 2 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:48:37.0 US/Eastern CANCEL ELEC* ELEC1C Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:49:18.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C CALC_REQUEST 9 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:49:43.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC1C CALC_REQUEST 10 HINT #.(wb-quant '(define-variable "V" |NIL| |potential| |region| |T0| |all sources| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. 2 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:49:50.0 US/Eastern CANCEL ELEC* ELEC1C Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:49:55.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C CALC_REQUEST 11 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:50:13.0 US/Eastern CANCEL ELEC* ELEC1C Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:51:08.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 12 CORRECT 4 "E" Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:51:25.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 CORRECT Answer-1 "5.580e-11 N/C" Self-explanation Control 59 S0714 S0714-Feb16-10-05-30 2007-02-16 10:51:35.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 2 CORRECT Answer-1 "5.580e-11 N/C" Self-explanation Control 60 S0714 S0714-Feb16-10-05-30 2007-02-16 10:51:55.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C Unknown 1 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 10:51:58.0 US/Eastern CANCEL ELEC* ELEC1C Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:07:50.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT Var-1 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19" Forgot to put units on a number. 1 Self-explanation Control DEFINE-CHARGE (= Q_ELECTRON (- 1.5999999999999998e-19)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:08:04.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-1 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Self-explanation Control DEFINE-CHARGE 6 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0714 S0714-Feb16-10-05-30 2007-02-16 11:08:21.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-2 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 11 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:08:21.0 US/Eastern DELETION ELEC* ELEC3A Var-3 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:08:21.0 US/Eastern DELETION ELEC* ELEC3A Var-4 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:08:21.0 US/Eastern DELETION ELEC* ELEC3A Var-5 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:09:26.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-6 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.5 cm" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 10 S0714 S0714-Feb16-10-05-30 2007-02-16 11:09:28.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Var-6 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:09:41.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:09:41.0 US/Eastern DELETION ELEC* ELEC3A Var-7 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:10:18.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 INCORRECT Var-6 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.5 cm" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:10:18.0 US/Eastern DELETION ELEC* ELEC3A Var-6 Delete label=s Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:10:47.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 INCORRECT Var-8 label="V";quant=potential;subtype=NIL;body=region;agent=plates;time=T0 to T1;value="2.0 e+4 N/C" Self-explanation Control DRAW-BODY 9 S0714 S0714-Feb16-10-05-30 2007-02-16 11:10:50.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (BODY ELECTRON TIME NIL) 2 HINT Var-8 label=V Although you can always define a potential variable, none are needed for any solution I know of this problem. 1 Self-explanation Control DRAW-BODY S0714 S0714-Feb16-10-05-30 2007-02-16 11:10:50.0 US/Eastern DELETION ELEC* ELEC3A Var-8 Delete label=V Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:10:50.0 US/Eastern DELETION ELEC* ELEC3A Var-9 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:11:13.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (BODY ELECTRON TIME NIL) 3 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Self-explanation Control DRAW-BODY S0714 S0714-Feb16-10-05-30 2007-02-16 11:11:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (BODY ELECTRON TIME NIL) 4 HINT You should use the body tool to draw a body choosing the electron as the body. 2 2 Self-explanation Control DRAW-BODY 4 S0714 S0714-Feb16-10-05-30 2007-02-16 11:11:31.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 5 CORRECT System-10 label="electron";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 S0714 S0714-Feb16-10-05-30 2007-02-16 11:12:05.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-11 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=57 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 11:12:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 0 "E=2.00e+4 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 19 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:13:38.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT 1 "F=abs(q)*E" Undefined variable: F 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 11:14:23.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Vector-12 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=12;mag=66 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 11:14:27.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT 1 Undefined variable: F 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 11:14:31.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 14 S0714 S0714-Feb16-10-05-30 2007-02-16 11:14:46.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT Vector-12 label=F Do you really want the direction of that vector to be 12 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 11:14:48.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT Think about how the direction of the electric force on the electron due to the plates is related to the direction of the electric field vector. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 11:14:51.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 7 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 11:14:51.0 US/Eastern DELETION ELEC* ELEC3A Vector-12 Delete label=F Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:15:19.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 8 CORRECT Vector-13 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=52 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 11:15:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 CORRECT 1 "F=abs(q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 26 (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:15:36.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 CORRECT 2 "F" Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:15:53.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 INCORRECT Var-14 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.5 cm" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 25 S0714 S0714-Feb16-10-05-30 2007-02-16 11:15:56.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT Var-14 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:16:02.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:16:04.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 HINT You should draw the displacement of the electron from T0 to T1. You can click on the light bulb button or 'explain further' for suggestions about how to solve the problem using it. 3 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:16:04.0 US/Eastern DELETION ELEC* ELEC3A Vector-15 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:17:06.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 INCORRECT Vector-16 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=60;mag=141 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:17:09.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 10 HINT Var-14 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:17:18.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 11 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:17:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 12 HINT You should draw the displacement of the electron from T0 to T1. You can click on the light bulb button or 'explain further' for suggestions about how to solve the problem using it. 3 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:17:19.0 US/Eastern DELETION ELEC* ELEC3A Vector-16 Delete label=d Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:17:19.0 US/Eastern DELETION ELEC* ELEC3A Vector-17 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:17:59.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 13 CORRECT Vector-18 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=76 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:18:05.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 3 "d=1.5 cm" Self-explanation Control WRITE-KNOWN-VALUE-EQN 29 (= s_ELECTRON_12 (DNUM 1.5 cm)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:18:05.0 US/Eastern DELETION ELEC* ELEC3A Var-14 Delete label=s Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:18:39.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT 4 "F=m*a" Undefined variable: a 1 Self-explanation Control DRAW-ACCEL-SPEED-UP S0714 S0714-Feb16-10-05-30 2007-02-16 11:19:24.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-19 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=77 Self-explanation Control DRAW-ACCEL-SPEED-UP S0714 S0714-Feb16-10-05-30 2007-02-16 11:19:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 4 "F=m*a" Self-explanation Control (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:19:33.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 2 CORRECT 5 "a" Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:21:02.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 INCORRECT Var-20 label="v";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T0;value="0 m/s" Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:21:04.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 2 HINT Var-20 label=v On this problem, you should use velocity instead of speed. 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:21:23.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 3 INCORRECT Var-20 label="v";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T0;value="0 m/s" Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:21:23.0 US/Eastern DELETION ELEC* ELEC3A Var-20 Delete label=v Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:21:48.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 INCORRECT Vector-21 label="v";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=73 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:21:51.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (DRAW-AXES 0) 1 HINT Vector-21 label=v You don't need to draw the velocity at T0. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-UNROTATED-AXES S0714 S0714-Feb16-10-05-30 2007-02-16 11:22:02.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (DRAW-AXES 0) 2 HINT It is now a good idea for you to draw an axis. This will help to ground your work and be useful later on in the process. 1 Self-explanation Control DRAW-UNROTATED-AXES S0714 S0714-Feb16-10-05-30 2007-02-16 11:22:02.0 US/Eastern DELETION ELEC* ELEC3A Axes-22 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:22:02.0 US/Eastern DELETION ELEC* ELEC3A Axes-23 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:22:24.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 3 CORRECT Axes-24 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 39 S0714 S0714-Feb16-10-05-30 2007-02-16 11:22:29.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 4 CORRECT Axes-24 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES S0714 S0714-Feb16-10-05-30 2007-02-16 11:22:32.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 5 CORRECT Axes-24 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES S0714 S0714-Feb16-10-05-30 2007-02-16 11:22:32.0 US/Eastern DELETION ELEC* ELEC3A Vector-21 Delete label=v Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:22:46.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:23:08.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 3 HINT #.(wb-quant '(define-variable "v" |instantaneous| |velocity| |electron| |T1| |NIL| NIL "") 'yc) That quantity is not sought by the problem statement. 2 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:23:18.0 US/Eastern CANCEL ELEC* ELEC3A Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:24:10.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 4 INCORRECT Vector-25 label="v";type=Velocity;body=electron;agent=average;time=T0 to T1;dir=90;mag=75 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:24:14.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 5 HINT Vector-25 label=v You don't need to draw the velocity from T0 to T1. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:24:14.0 US/Eastern DELETION ELEC* ELEC3A Vector-25 Delete label=v Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:24:31.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 6 INCORRECT Vector-26 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=86;mag=74 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:24:31.0 US/Eastern DELETION ELEC* ELEC3A Vector-19 Delete label=a Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:24:31.0 US/Eastern DELETION ELEC* ELEC3A Vector-26 Delete label=v Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:24:52.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 7 CORRECT Vector-27 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=75 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:25:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 CORRECT Vector-28 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=79 Self-explanation Control DRAW-ACCEL-SPEED-UP S0714 S0714-Feb16-10-05-30 2007-02-16 11:26:07.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 8 CORRECT Vector-27 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=75 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:26:41.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 1 INCORRECT 6 "v=a*t" Undefined variable: t 1 Self-explanation Control DEFINE-DURATION S0714 S0714-Feb16-10-05-30 2007-02-16 11:26:44.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 2 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DEFINE-DURATION S0714 S0714-Feb16-10-05-30 2007-02-16 11:26:52.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 3 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DEFINE-DURATION S0714 S0714-Feb16-10-05-30 2007-02-16 11:26:56.0 US/Eastern CANCEL ELEC* ELEC3A Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:27:07.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 4 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DEFINE-DURATION S0714 S0714-Feb16-10-05-30 2007-02-16 11:27:07.0 US/Eastern DELETION ELEC* ELEC3A 6 Delete Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:27:17.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 5 HINT #.(wb-quant '(define-variable "v" |instantaneous| |velocity| |electron| |T1| |NIL| NIL "") 'mag) Very good. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Self-explanation Control DEFINE-DURATION S0714 S0714-Feb16-10-05-30 2007-02-16 11:27:42.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 6 HINT (lk-no-vf ((?axis . x))) No application of that principle on the X axis appear in a solution to this problem. However, that principle can be applied on the Y axis. Unfortunately, they cannot be used to start the solution. What is the first principle application that you wish to work on? You should look for a principle that is related to the sought quantity indirectly. 3 Self-explanation Control DEFINE-DURATION S0714 S0714-Feb16-10-05-30 2007-02-16 11:28:04.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 7 HINT (lk-no-s ((?axis . y))) Right. Your goal should be choosing a particular kinematic equation containing the duration of the interval from T0 to T1. 4 Self-explanation Control DEFINE-DURATION S0714 S0714-Feb16-10-05-30 2007-02-16 11:29:08.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 8 INCORRECT 6 "a=v/t" Undefined variable: t 1 Self-explanation Control DEFINE-DURATION S0714 S0714-Feb16-10-05-30 2007-02-16 11:29:08.0 US/Eastern DELETION ELEC* ELEC3A Var-29 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:29:38.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 9 CORRECT Var-30 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Self-explanation Control DEFINE-DURATION S0714 S0714-Feb16-10-05-30 2007-02-16 11:29:40.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 2 TRUE_BUT_IRRELEVANT 6 "a=v/t" Self-explanation Control (= a_ELECTRON_12 (/ v_ELECTRON_2 t_12)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:29:48.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 3 INCORRECT 7 "t" Unable to solve for t. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:30:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_1_0 0)) 1 CORRECT 7 "v_y=a_y*t" Self-explanation Control COMPO-ZERO-VECTOR 45 (= Yc_v_ELECTRON_2_0 (* Yc_a_ELECTRON_12_0 t_12)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:30:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 1 CORRECT 7 "v_y=a_y*t" Self-explanation Control WRITE-LK-NO-S-COMPO 45 (= Yc_v_ELECTRON_2_0 (* Yc_a_ELECTRON_12_0 t_12)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:30:48.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 4 INCORRECT 8 "t" Unable to solve for t. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:30:59.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 4 HINT Why don't you continue with the solution by working on applying the definition of average acceleration on the electron from T0 to T1. 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:32:15.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 5 INCORRECT 8 "v_y=d/t" Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST (= Yc_v_ELECTRON_2_0 (/ s_ELECTRON_12 t_12)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:32:18.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 6 HINT 8 What equation do you wish to write? 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:32:27.0 US/Eastern HINT_REQUEST Choose-Equation HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 7 HINT (avg-velocity ((?axis . y))) I'm afraid that the equation type that you selected does not appear in any of the solutions to this problem. Why don't you try something different or go to Light-Bulb-Help if you do not know what to do. 2 2 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST 40 S0714 S0714-Feb16-10-05-30 2007-02-16 11:32:35.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 8 HINT Why don't you continue working on applying the definition of average acceleration on the electron from T0 to T1. 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:32:35.0 US/Eastern DELETION ELEC* ELEC3A 8 Delete Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:32:55.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 9 INCORRECT 8 "vi_x=0 m/s" Undefined variable: vi_x 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:32:55.0 US/Eastern DELETION ELEC* ELEC3A 8 Delete Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:33:09.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 10 HINT Why don't you continue working on applying the definition of average acceleration on the electron from T0 to T1. 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:33:09.0 US/Eastern DELETION ELEC* ELEC3A Vector-31 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:34:28.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 11 CORRECT Vector-32 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:34:28.0 US/Eastern DELETION ELEC* ELEC3A Vector-33 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:35:05.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 9 INCORRECT Vector-34 label="vavg";type=Velocity;body=electron;agent=average;time=T0 to T1;dir=90;mag=77 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:35:10.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 10 HINT Vector-34 label=vavg The closest matching CORRECT entry seems to be done already, so you really don't need to generate it again. If you want to anyway, click on Explain more. 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:35:24.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 11 INCORRECT Vector-34 label="va";type=Velocity;body=electron;agent=average;time=T0 to T1;dir=90;mag=77 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 11:35:24.0 US/Eastern DELETION ELEC* ELEC3A Vector-34 Delete label=va Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:35:58.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_1_0 0)) 2 CORRECT 8 "a_y=(v-vi)/t" Self-explanation Control COMPO-ZERO-VECTOR (= Yc_a_ELECTRON_12_0 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:35:58.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 2 CORRECT 8 "a_y=(v-vi)/t" Self-explanation Control WRITE-LK-NO-S-COMPO (= Yc_a_ELECTRON_12_0 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:35:58.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 1 CORRECT 8 "a_y=(v-vi)/t" Self-explanation Control WRITE-IMPLICIT-EQN (= Yc_a_ELECTRON_12_0 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:35:58.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 1 CORRECT 8 "a_y=(v-vi)/t" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_a_ELECTRON_12_0 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:36:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 2 CORRECT 9 "vi=0 m/s" Self-explanation Control WRITE-IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:36:16.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 5 INCORRECT 10 "v" Unable to solve for v. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:36:23.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 6 INCORRECT 10 "t" Unable to solve for t. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:36:40.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 7 CORRECT 10 "a_y" Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:37:28.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 3 INCORRECT 11 "v=vi*t+a*t" Units are inconsistent. 1 1 Self-explanation Control (= v_ELECTRON_2 (+ (* v_ELECTRON_1 t_12) (* a_ELECTRON_12 t_12))) S0714 S0714-Feb16-10-05-30 2007-02-16 11:37:39.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 4 INCORRECT 11 "v=vi*t+a*t^2" Units are inconsistent. 1 1 Self-explanation Control (= v_ELECTRON_2 (+ (* v_ELECTRON_1 t_12) (* a_ELECTRON_12 (^ t_12 2)))) S0714 S0714-Feb16-10-05-30 2007-02-16 11:38:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 5 TRUE_BUT_IRRELEVANT 11 "d=vi*t+0.5*a*t^2" Self-explanation Control (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 a_ELECTRON_12) (^ t_12 2)))) S0714 S0714-Feb16-10-05-30 2007-02-16 11:38:36.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 8 CORRECT 12 "t" Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:38:41.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 9 CORRECT 13 "v" Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:38:53.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.027 e+7 m/s" Self-explanation Control 65 S0714 S0714-Feb16-10-05-30 2007-02-16 11:54:06.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-667 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.6e-19 C" Self-explanation Control DEFINE-CHARGE 9 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0714 S0714-Feb16-10-05-30 2007-02-16 11:54:20.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-668 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 12 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:54:32.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-669 label="Electron";body=electron;time=NIL Self-explanation Control DRAW-BODY 22 S0714 S0714-Feb16-10-05-30 2007-02-16 11:54:32.0 US/Eastern DELETION ELEC* ELEC6A Axes-670 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:54:32.0 US/Eastern DELETION ELEC* ELEC6A Axes-671 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:54:52.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 2 INCORRECT System-672 label="Earth";body=earth;time=NIL Self-explanation Control DRAW-BODY 21 S0714 S0714-Feb16-10-05-30 2007-02-16 11:54:52.0 US/Eastern DELETION ELEC* ELEC6A Axes-673 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:54:52.0 US/Eastern DELETION ELEC* ELEC6A Axes-674 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:54:52.0 US/Eastern DELETION ELEC* ELEC6A Axes-675 Delete label=NIL Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:55:23.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-676 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 32 S0714 S0714-Feb16-10-05-30 2007-02-16 11:55:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-677 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=180;mag=42 Self-explanation Control DRAW-FIELD-GIVEN-DIR 31 S0714 S0714-Feb16-10-05-30 2007-02-16 11:55:47.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 HINT Vector-677 label=E Do you really want the direction of that vector to be 180 degrees? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 11:55:59.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 HINT You can determine the direction of the electric field at the region due to an unspecified agent from the problem statement 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 11:56:03.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 HINT Use the electric field drawing tool to draw the electric field at the region due to an unspecified agent in the given direction of 270 degrees. 3 3 Self-explanation Control DRAW-FIELD-GIVEN-DIR 26 S0714 S0714-Feb16-10-05-30 2007-02-16 11:56:03.0 US/Eastern DELETION ELEC* ELEC6A Vector-677 Delete label=E Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:56:15.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 CORRECT Vector-678 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=40 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 11:56:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 0 "E=4.00e-12 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 30 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:56:47.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 INCORRECT Vector-679 label="v";type=Velocity;body=electron;agent=average;time=T0 to T1;dir=360;mag=68 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:56:51.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 2 HINT Vector-679 label=v Both the time specification and the direction of that vector look odd to me. 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:56:55.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 3 HINT 2 None of the solutions that I know of contain a vector for the velocity at that time or in that direction. 2 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:57:00.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 4 HINT 2 If you are unsure of what to do you can call Next-Step-Help and it will guide you in defining a solution. 3 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:57:00.0 US/Eastern DELETION ELEC* ELEC6A Vector-679 Delete label=v Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:57:19.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 5 INCORRECT Vector-680 label="v";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST 29 S0714 S0714-Feb16-10-05-30 2007-02-16 11:57:22.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Vector-680 label=v You don't need to draw the velocity at T0. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 11:57:37.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Vector-680 label=v You don't need to draw the velocity at T0. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 11:57:37.0 US/Eastern DELETION ELEC* ELEC6A Vector-680 Delete label=v Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:57:58.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT 1 "F=abs(q)*E" Undefined variable: F 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 11:58:36.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 4 INCORRECT Vector-681 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=61 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0714 S0714-Feb16-10-05-30 2007-02-16 11:58:38.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 6 HINT 1 Undefined variable: F 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:58:44.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 7 HINT Vector-681 label=F You don't need to draw the force at T0. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:58:53.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 8 HINT You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the velocity of the electron at T0. 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:59:19.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 9 CORRECT Vector-682 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0714 S0714-Feb16-10-05-30 2007-02-16 11:59:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 INCORRECT 2 "v=4.3 m/s" Self-explanation Control DRAW-VELOCITY-STRAIGHT (= v_ELECTRON_2 (DNUM 4.3 m/s)) S0714 S0714-Feb16-10-05-30 2007-02-16 11:59:26.0 US/Eastern DELETION ELEC* ELEC6A 2 Delete Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 11:59:41.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 HINT Vector-674 label=v Why don't you continue working on entering the given value of the magnitude of the velocity of the electron at T0. 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 12:00:04.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 2 INCORRECT Vector-683 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=360;mag=53 Self-explanation Control DRAW-VELOCITY-STRAIGHT 28 S0714 S0714-Feb16-10-05-30 2007-02-16 12:00:06.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 3 HINT Vector-683 label=vi Do you really want the direction of that vector to be 0 degrees? 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 12:00:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 4 HINT Notice that the electron is moving in a straight line at T0. 2 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 12:00:14.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 5 HINT Whenever an object is moving in a straight line, it has a velocity in the same direction as its motion. 3 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 12:00:17.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 6 HINT Because the electron is moving in a straight line at T0, draw a non-zero vector in direction 90 degrees. 4 4 Self-explanation Control DRAW-VELOCITY-STRAIGHT 23 S0714 S0714-Feb16-10-05-30 2007-02-16 12:00:17.0 US/Eastern DELETION ELEC* ELEC6A Vector-683 Delete label=vi Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 12:00:37.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 7 INCORRECT Vector-684 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 12:00:43.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 2 INCORRECT 2 "vi-4.3 m/s" Syntax error in vi-4.3 m/s 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN ? S0714 S0714-Feb16-10-05-30 2007-02-16 12:00:52.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 3 CORRECT 2 "vi=4.3 m/s" Self-explanation Control WRITE-KNOWN-VALUE-EQN 27 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0714 S0714-Feb16-10-05-30 2007-02-16 12:00:57.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 8 HINT 1 Undefined variable: F 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 12:00:57.0 US/Eastern DELETION ELEC* ELEC6A Vector-681 Delete label=F Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 12:00:57.0 US/Eastern DELETION ELEC* ELEC6A 1 Delete Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 12:01:13.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 9 HINT Vector-684 label=vi Is the electron is at rest at T0? 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 12:01:13.0 US/Eastern DELETION ELEC* ELEC6A Vector-684 Delete label=vi Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 12:01:48.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 10 CORRECT Vector-685 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=25 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 12:01:57.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 11 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 12:02:07.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 12 HINT #.(wb-quant '(define-variable "s" |NIL| |distance| |electron| |T0 to T1| |NIL| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. 2 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 12:02:16.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 13 HINT #.(wb-quant '(define-variable "s" |NIL| |distance| |electron| |T1| |NIL| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. 3 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 12:02:16.0 US/Eastern CANCEL ELEC* ELEC6A Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 12:03:06.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 14 INCORRECT Vector-686 label="vav";type=Velocity;body=electron;agent=average;time=T0 to T1;dir=90;mag=44 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0714 S0714-Feb16-10-05-30 2007-02-16 12:03:06.0 US/Eastern DELETION ELEC* ELEC6A Vector-686 Delete label=vav Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 12:03:38.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC6A Unknown 1 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 12:03:49.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A Unknown 2 HINT #.(wb-quant '(define-variable "s" |NIL| |distance| |electron| |T0 to T1| |NIL| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. 2 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 12:04:03.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A Unknown 3 HINT #.(wb-quant '(define-variable "d" |NIL| |displacement| |earth| |T0 to T1| |NIL| NIL "") 'yc) That quantity is not mentioned in the Andes solution. 3 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 12:04:15.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC6A Unknown 4 HINT #.(wb-quant '(define-variable "d" |NIL| |displacement| |electron| |T0 to T1| |NIL| NIL "") 'mag) Correct. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 4 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 12:04:30.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC6A Unknown 5 HINT (lk-no-vf ((?axis . x))) The principle that you chose is correct, but it should be applied along the Y axis in this problem. Do you wish to use that axis instead? 5 5 Self-explanation Control S0714 S0714-Feb16-10-05-30 2007-02-16 12:04:36.0 US/Eastern HINT_REQUEST Choose- HINT_MSG NextStepHelp ELEC* ELEC6A Unknown 6 HINT "Yes" That's right. Try choosing a particular kinematic equation containing the y component of the displacement of the electron from T0 to T1. 6 Self-explanation Control S0715 S0715-Feb16-13-55-22 2007-02-16 14:05:19.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 CORRECT Var-1 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Joint Explanation Experimental DEFINE-CHARGE 12 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0715 S0715-Feb16-13-55-22 2007-02-16 14:05:19.0 US/Eastern DELETION FOR* FOR4C Vector-2 Delete label=NIL Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:07:50.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 INCORRECT Vector-3 label="E";type=E-field;body=region;agent=particle;time=NIL;dir=22;mag=189 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 10 S0715 S0715-Feb16-13-55-22 2007-02-16 14:07:59.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 INCORRECT 0 "E=14.3e+3 N/C" The variable E is not used in any solution I know of. 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 9 S0715 S0715-Feb16-13-55-22 2007-02-16 14:08:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 3 HINT I can only recognize equations and variables from solutions I know about. This variable is not used in any of the solutions I have recorded for this problem. It's possible you are pursuing a solution that I don't know about, but if so, I can't help you with it and simpler solutions are probably available. 2 2 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:08:33.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 4 HINT Vector-3 label=E Is the particle the source of the electric field you are defining? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:08:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 5 HINT A better choice (but maybe not the only one) would be the field due to an unspecified agent, not the particle 2 2 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 4 S0715 S0715-Feb16-13-55-22 2007-02-16 14:08:39.0 US/Eastern DELETION FOR* FOR4C Vector-3 Delete label=E Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:09:11.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 6 CORRECT Vector-4 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=194 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 5 S0715 S0715-Feb16-13-55-22 2007-02-16 14:09:14.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 0 "E=14.3e+3 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 13 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0715 S0715-Feb16-13-55-22 2007-02-16 14:09:21.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Q_PARTICLE (DNUM -7.9 $mC))) 1 CORRECT 1 "q=-7.9e-6 C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0715 S0715-Feb16-13-55-22 2007-02-16 14:11:59.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 3 "$qE" Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:12:11.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (DRAW-AXES 22) 1 INCORRECT 2 "F_x=q*E_x" Undefined variables: (F_x E_x) 1 Joint Explanation Experimental DRAW-VECTOR-ALIGNED-AXES S0715 S0715-Feb16-13-55-22 2007-02-16 14:12:13.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (DRAW-AXES 22) 2 HINT The variable: E_x may be defined by drawing coordinate axes. 2 2 Joint Explanation Experimental DRAW-VECTOR-ALIGNED-AXES S0715 S0715-Feb16-13-55-22 2007-02-16 14:12:45.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 22) 3 CORRECT Axes-5 body=NIL;dir=22;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-VECTOR-ALIGNED-AXES 23 S0715 S0715-Feb16-13-55-22 2007-02-16 14:12:57.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 1 CORRECT Axes-5 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES S0715 S0715-Feb16-13-55-22 2007-02-16 14:13:03.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 INCORRECT 2 "F_x=q*E_x" Undefined variable: F_x 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:13:07.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT Vector-4 label=F Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:13:07.0 US/Eastern DELETION FOR* FOR4C 2 Delete Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:15:22.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 INCORRECT 4 "F_x=q*E_x" Undefined variable: F_x 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 22 S0715 S0715-Feb16-13-55-22 2007-02-16 14:15:26.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 4 HINT Vector-4 label=F Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:17:45.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 5 CORRECT Vector-6 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=113 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 23 S0715 S0715-Feb16-13-55-22 2007-02-16 14:17:59.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 1 CORRECT 4 "F_x=q*E_x" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 58 (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0)) S0715 S0715-Feb16-13-55-22 2007-02-16 14:18:12.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 2 INCORRECT 2 "F_x" Unable to solve for F_x. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:18:22.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (BODY PARTICLE TIME NIL) 1 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Joint Explanation Experimental DRAW-BODY S0715 S0715-Feb16-13-55-22 2007-02-16 14:18:31.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp FOR* FOR4C (BODY PARTICLE TIME NIL) 2 HINT You should use the body tool to draw a body choosing the particle as the body. 2 2 Joint Explanation Experimental DRAW-BODY 53 S0715 S0715-Feb16-13-55-22 2007-02-16 14:19:43.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 3 CORRECT System-7 label="q";body=particle;time=NIL Joint Explanation Experimental DRAW-BODY 63 S0715 S0715-Feb16-13-55-22 2007-02-16 14:19:51.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 3 INCORRECT 2 "F_x" Unable to solve for F_x. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:19:57.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 HINT 1 Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0715 S0715-Feb16-13-55-22 2007-02-16 14:20:00.0 US/Eastern CANCEL FOR* FOR4C Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:20:23.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 2 HINT 1 Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0715 S0715-Feb16-13-55-22 2007-02-16 14:20:30.0 US/Eastern CANCEL FOR* FOR4C Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:20:43.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 3 HINT 1 Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0715 S0715-Feb16-13-55-22 2007-02-16 14:21:06.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 4 HINT #.(wb-quant '(define-variable "F" |Electric| |force| |particle| |T0| |particle| NIL "") 'mag) That quantity is not mentioned in the Andes solution. 2 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0715 S0715-Feb16-13-55-22 2007-02-16 14:21:18.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 5 HINT #.(wb-quant '(define-variable "F" |Electric| |force| |particle| |T0| |Unspecified| NIL "") 'mag) Right. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 3 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0715 S0715-Feb16-13-55-22 2007-02-16 14:21:49.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 6 HINT (charge-force-efield ((?axis . x))) That principle is part of a valid solution to this problem but you cannot use it as the first principle. What is the first principle application that you wish to work on? You should look for a principle that contains the sought quantity itself. 4 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0715 S0715-Feb16-13-55-22 2007-02-16 14:22:12.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 7 HINT charge-force-efield-mag Right indeed. What is the relationship between the force, the charge and the electric field? 5 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0715 S0715-Feb16-13-55-22 2007-02-16 14:22:17.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 8 HINT 1 The electric field vector at a location is defined as electric force vector per unit charge. That is, the electric force vector that a test charge would undergo if placed there, divided by the size of the charge. This definition can be applied to relate force and field magnitudes. 6 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0715 S0715-Feb16-13-55-22 2007-02-16 14:22:27.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 9 HINT 1 Write the equation F = (ABS q) * E 7 7 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 58 S0715 S0715-Feb16-13-55-22 2007-02-16 14:22:52.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 10 CORRECT 5 "F=(ABS q)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED)) S0715 S0715-Feb16-13-55-22 2007-02-16 14:23:01.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 4 CORRECT 2 "F" Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:23:06.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 5 INCORRECT 6 "F_x" Although you seem to have enough equations, the Andes solver is unable to solve them for F_x in their current form. Try entering algebraic combinations to isolate a calculable expression for F_x yourself. Combining equations and plugging in numbers for variables, solving for intermediate unknowns if needed, might get you closer to a form that Andes can solve. If not, you will just have to finish the problem on your own. 1 1 Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:24:00.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 "1.13e-1 N" Joint Explanation Experimental 83 S0715 S0715-Feb16-13-55-22 2007-02-16 14:32:32.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0715 S0715-Feb16-13-55-22 2007-02-16 14:32:49.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 2 INCORRECT System-668 label="E";body=earth;time=NIL Joint Explanation Experimental DRAW-BODY 12 S0715 S0715-Feb16-13-55-22 2007-02-16 14:34:07.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-669 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=0;mag=118 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:34:56.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 INCORRECT Vector-670 label="F";type=Force;body=electron;agent=earth;forcetype=Electric;time=T0;dir=180;mag=120 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 11 S0715 S0715-Feb16-13-55-22 2007-02-16 14:35:15.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 HINT Vector-669 label=E Do you really want the direction of that vector to be 0 degrees? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:35:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 HINT You can determine the direction of the electric field at the region due to an unspecified agent from the problem statement 2 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:35:24.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 HINT Use the electric field drawing tool to draw the electric field at the region due to an unspecified agent in the given direction of 270 degrees. 3 3 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 6 S0715 S0715-Feb16-13-55-22 2007-02-16 14:35:24.0 US/Eastern DELETION ELEC* ELEC1C Vector-669 Delete label=E Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:35:59.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 CORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=158 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 7 S0715 S0715-Feb16-13-55-22 2007-02-16 14:35:59.0 US/Eastern DELETION ELEC* ELEC1C Vector-670 Delete label=F Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:36:39.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 2 INCORRECT Vector-672 label="F";type=Force;body=electron;agent=earth;forcetype=Electric;time=T0;dir=90;mag=120 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:36:39.0 US/Eastern DELETION ELEC* ELEC1C Vector-672 Delete label=F Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:37:03.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 3 INCORRECT Vector-673 label="F";type=Force;body=electron;agent=earth;forcetype=Electric;time=T0;dir=180;mag=112 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 6 S0715 S0715-Feb16-13-55-22 2007-02-16 14:37:15.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 4 HINT Vector-673 label=F Is the force is due to the earth? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:37:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 5 HINT Forces are caused by interacting objects. The force can either be a field force, such as weight, in which case the objects do not have to touch. Or the force is a contact force, such as tension or friction, in which case the objects must touch. 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:37:35.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 6 HINT Draw a electric force on the electron at T0, but make it be due to an unspecified agent instead of the earth. 3 3 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 1 S0715 S0715-Feb16-13-55-22 2007-02-16 14:37:35.0 US/Eastern DELETION ELEC* ELEC1C Vector-673 Delete label=F Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:38:07.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 7 INCORRECT Vector-674 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=180;mag=131 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:38:12.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 8 HINT Vector-674 label=F Do you really want the direction of that vector to be 180 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:38:15.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 9 HINT Think about how the direction of the electric force on the electron due to an unspecified agent is related to the direction of the electric field vector. 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:38:28.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 10 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 3 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:38:41.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 11 HINT Because the charge of the electron is negative, use the force drawing tool (labeled F) to draw the electric force on the electron due to an unspecified agent in the opposite direction as the electric field at that location, namely 90 degrees. 4 4 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR -4 S0715 S0715-Feb16-13-55-22 2007-02-16 14:38:41.0 US/Eastern DELETION ELEC* ELEC1C Vector-674 Delete label=F Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:39:12.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 12 CORRECT Vector-675 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=122 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR -3 S0715 S0715-Feb16-13-55-22 2007-02-16 14:39:41.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT 0 "qe=-1.60e-19 C" Undefined variable: qe 1 Joint Explanation Experimental DEFINE-CHARGE S0715 S0715-Feb16-13-55-22 2007-02-16 14:40:11.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-676 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 4 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0715 S0715-Feb16-13-55-22 2007-02-16 14:40:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Q_ELECTRON (DNUM -1.5999999999999998e-19 C))) 1 CORRECT 0 "qe=-1.60e-19 C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 5 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0715 S0715-Feb16-13-55-22 2007-02-16 14:40:36.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-677 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 12 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0715 S0715-Feb16-13-55-22 2007-02-16 14:40:47.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= m_ELECTRON (DNUM 9.11e-31 kg))) 1 CORRECT 1 "m=9.11e-31 kg" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= m_ELECTRON (DNUM 9.11e-31 kg)) S0715 S0715-Feb16-13-55-22 2007-02-16 14:40:47.0 US/Eastern DELETION ELEC* ELEC1C Var-678 Delete label=NIL Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:42:56.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= g_EARTH (DNUM 9.8 m/s^2))) 1 CORRECT 2 "g=9.8 m/s^2" Joint Explanation Experimental WRITE-G-ON-EARTH 13 (= g_EARTH (DNUM 9.8 m/s^2)) S0715 S0715-Feb16-13-55-22 2007-02-16 14:43:19.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 INCORRECT 3 "a=g" Undefined variable: a 1 Joint Explanation Experimental COMPO-ZERO-VECTOR 12 S0715 S0715-Feb16-13-55-22 2007-02-16 14:43:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 2 CORRECT 3 "F=m*g" Joint Explanation Experimental COMPO-ZERO-VECTOR 13 (= Fe_ELECTRON_UNSPECIFIED_1 (* m_ELECTRON g_EARTH)) S0715 S0715-Feb16-13-55-22 2007-02-16 14:43:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 CORRECT 3 "F=m*g" Joint Explanation Experimental WT-LAW 13 (= Fe_ELECTRON_UNSPECIFIED_1 (* m_ELECTRON g_EARTH)) S0715 S0715-Feb16-13-55-22 2007-02-16 14:43:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 3 "F=m*g" Joint Explanation Experimental COMPO-PARALLEL-AXIS 13 (= Fe_ELECTRON_UNSPECIFIED_1 (* m_ELECTRON g_EARTH)) S0715 S0715-Feb16-13-55-22 2007-02-16 14:43:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 3 "F=m*g" Joint Explanation Experimental WRITE-NET-FORCE-COMPO 13 (= Fe_ELECTRON_UNSPECIFIED_1 (* m_ELECTRON g_EARTH)) S0715 S0715-Feb16-13-55-22 2007-02-16 14:43:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 3 "F=m*g" Joint Explanation Experimental COMPO-PARALLEL-AXIS 13 (= Fe_ELECTRON_UNSPECIFIED_1 (* m_ELECTRON g_EARTH)) S0715 S0715-Feb16-13-55-22 2007-02-16 14:44:28.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 INCORRECT 4 "F=abs(q)E" Syntax error in F=abs(q)E 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 12 ? S0715 S0715-Feb16-13-55-22 2007-02-16 14:44:35.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 INCORRECT 4 "F=abs(q)*E" Undefined variable: q 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0715 S0715-Feb16-13-55-22 2007-02-16 14:44:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 3 CORRECT 4 "F=abs(qe)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 48 (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0715 S0715-Feb16-13-55-22 2007-02-16 14:45:08.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 CORRECT 5 "E" Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:45:26.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 CORRECT Answer-1 "5.58e-11 N/C" Joint Explanation Experimental 72 S0715 S0715-Feb16-13-55-22 2007-02-16 14:56:12.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-1 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=90;mag=100 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:56:16.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 2 HINT Vector-1 label=E Do you really want the direction of that vector to be 90 degrees? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:56:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 3 HINT You can determine the direction of the electric field at the region due to the plates from the problem statement 2 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 14:56:40.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 4 HINT Use the electric field drawing tool to draw the electric field at the region due to the plates in the given direction of 270 degrees. 3 3 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR -5 S0715 S0715-Feb16-13-55-22 2007-02-16 14:56:40.0 US/Eastern DELETION ELEC* ELEC3A Vector-1 Delete label=E Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:57:03.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 5 CORRECT Vector-2 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=127 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR -2 S0715 S0715-Feb16-13-55-22 2007-02-16 14:57:28.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-3 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19C" Joint Explanation Experimental DEFINE-CHARGE 2 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0715 S0715-Feb16-13-55-22 2007-02-16 14:57:47.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-4 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 6 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0715 S0715-Feb16-13-55-22 2007-02-16 14:58:18.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 INCORRECT Var-5 label="l";quant=length;subtype=NIL;body=plates;agent=NIL;time=NIL;value="1..50 cm" Joint Explanation Experimental DRAW-BODY S0715 S0715-Feb16-13-55-22 2007-02-16 14:58:23.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (BODY ELECTRON TIME NIL) 2 HINT Var-5 label=l Although you can always define a length variable, none are needed for any solution I know of this problem. 1 Joint Explanation Experimental DRAW-BODY S0715 S0715-Feb16-13-55-22 2007-02-16 14:58:28.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (BODY ELECTRON TIME NIL) 3 HINT Click on the light bulb button or 'explain further' for suggestions on how to solve this problem. 2 Joint Explanation Experimental DRAW-BODY S0715 S0715-Feb16-13-55-22 2007-02-16 14:58:33.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (BODY ELECTRON TIME NIL) 4 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 3 Joint Explanation Experimental DRAW-BODY S0715 S0715-Feb16-13-55-22 2007-02-16 14:58:36.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (BODY ELECTRON TIME NIL) 5 HINT You should use the body tool to draw a body choosing the electron as the body. 4 4 Joint Explanation Experimental DRAW-BODY 1 S0715 S0715-Feb16-13-55-22 2007-02-16 14:58:56.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 6 CORRECT System-6 label="qe";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 11 S0715 S0715-Feb16-13-55-22 2007-02-16 14:58:56.0 US/Eastern DELETION ELEC* ELEC3A Var-5 Delete label=l Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 14:59:41.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-7 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.50 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 10 S0715 S0715-Feb16-13-55-22 2007-02-16 14:59:46.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (DRAW-AXES 0) 1 HINT Var-7 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-UNROTATED-AXES S0715 S0715-Feb16-13-55-22 2007-02-16 14:59:54.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (DRAW-AXES 0) 2 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 2 Joint Explanation Experimental DRAW-UNROTATED-AXES S0715 S0715-Feb16-13-55-22 2007-02-16 14:59:59.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (DRAW-AXES 0) 3 HINT You should draw the displacement of the electron from T0 to T1. You can click on the light bulb button or 'explain further' for suggestions about how to solve the problem using it. 3 Joint Explanation Experimental DRAW-UNROTATED-AXES S0715 S0715-Feb16-13-55-22 2007-02-16 15:00:06.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (DRAW-AXES 0) 4 HINT It is now a good idea for you to draw an axis. This will help to ground your work and be useful later on in the process. 4 Joint Explanation Experimental DRAW-UNROTATED-AXES S0715 S0715-Feb16-13-55-22 2007-02-16 15:00:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (DRAW-AXES 0) 5 HINT Why don't you draw a pair of standard axes setting the positive X axis at 0 degrees. 5 5 Joint Explanation Experimental DRAW-UNROTATED-AXES 5 S0715 S0715-Feb16-13-55-22 2007-02-16 15:00:09.0 US/Eastern DELETION ELEC* ELEC3A Axes-8 Delete label=NIL Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:00:28.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 6 CORRECT Axes-9 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 16 S0715 S0715-Feb16-13-55-22 2007-02-16 15:00:28.0 US/Eastern DELETION ELEC* ELEC3A Var-7 Delete label=s Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:02:49.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 HINT You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the electric field at the region due to the plates. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN S0715 S0715-Feb16-13-55-22 2007-02-16 15:02:57.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 2 HINT You can find the value of the magnitude of the electric field at the region due to the plates in the problem statement. 2 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN S0715 S0715-Feb16-13-55-22 2007-02-16 15:03:01.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 3 HINT The value of the magnitude of the electric field at the region due to the plates is given as 20000.0 N/C. 3 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN S0715 S0715-Feb16-13-55-22 2007-02-16 15:03:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 4 CORRECT 0 "E=2.00e+4 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 20 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0715 S0715-Feb16-13-55-22 2007-02-16 15:03:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Q_ELECTRON (DNUM -1.5999999999999998e-19 C))) 1 CORRECT 1 "qe= -1.60e-19 C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0715 S0715-Feb16-13-55-22 2007-02-16 15:03:48.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= m_ELECTRON (DNUM 9.11e-31 kg))) 1 CORRECT 2 "me=9.11e-31 kg" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= m_ELECTRON (DNUM 9.11e-31 kg)) S0715 S0715-Feb16-13-55-22 2007-02-16 15:04:18.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Var-10 label="g";quant=gravitational-acceleration;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.8 m/s^2" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:04:21.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Var-10 label=g Although you can always define a gravitational-acceleration variable, none are needed for any solution I know of this problem. 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:04:35.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:04:40.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT Try introducing a variable for the magnitude of the displacement of the electron from T0 to T1. 2 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:04:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT Notice that the electron is moving in a straight line from T0 to T1. 3 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:04:50.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 HINT Whenever an object is moving in a straight line over a time interval, it has a displacement which is parallel to the direction of motion. 4 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:04:55.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 HINT Because the electron is moving in a straight line from T0 to T1, use the displacement tool to draw a displacement vector for it in direction 90 degrees 5 5 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 15 S0715 S0715-Feb16-13-55-22 2007-02-16 15:04:55.0 US/Eastern DELETION ELEC* ELEC3A Var-10 Delete label=g Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:05:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 CORRECT Vector-11 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=118 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:05:50.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 3 "d=1.50 cm" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 19 (= s_ELECTRON_12 (DNUM 1.5 cm)) S0715 S0715-Feb16-13-55-22 2007-02-16 15:07:07.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:07:36.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 HINT #.(wb-quant '(define-variable "v" |average| |speed| |electron| |T0 to T1| |NIL| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. 2 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:08:25.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 3 HINT #.(wb-quant '(define-variable "v" |instantaneous| |speed| |electron| |T1| |NIL| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. 3 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:08:57.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 4 HINT #.(wb-quant '(define-variable "v" |instantaneous| |speed| |electron| |T0| |NIL| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. Let's just assume that you are seeking the magnitude of the velocity of the electron at T1. 4 4 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:09:04.0 US/Eastern HINT_REQUEST Choose- HINT_MSG Ask-Principle ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 5 HINT "OK" What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 5 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:09:57.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 6 HINT (avg-velocity ((?axis . y))) No principle applications of the type that you selected appear in the solution. What is the first principle application that you wish to work on? You should look for a principle that is related to the sought quantity indirectly. 6 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:10:30.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 7 HINT charge-force-efield-mag That principle is part of a valid solution to this problem but you cannot use it as the first principle. Lets just assume that you will work on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 7 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:10:41.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 8 HINT Try choosing a particular kinematic equation containing the y component of the velocity of the electron at T1. 8 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:10:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 9 HINT Try drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 9 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:10:49.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 10 HINT Notice that the electron is momentarily at rest at T0. 10 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0715 S0715-Feb16-13-55-22 2007-02-16 15:10:52.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 11 HINT When an object is at rest even momentarily, its velocity at that moment is zero. 11 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0715 S0715-Feb16-13-55-22 2007-02-16 15:10:56.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 12 HINT Because the electron is at rest at T0, use the velocity tool to draw a zero-length velocity vector for it. 12 12 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST 14 S0715 S0715-Feb16-13-55-22 2007-02-16 15:11:29.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 13 INCORRECT Vector-12 label="v";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=92 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT 13 S0715 S0715-Feb16-13-55-22 2007-02-16 15:11:36.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 HINT Vector-12 label=v You don't need to draw the velocity at T0. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0715 S0715-Feb16-13-55-22 2007-02-16 15:11:36.0 US/Eastern DELETION ELEC* ELEC3A Vector-12 Delete label=v Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:12:03.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 2 CORRECT Vector-13 label="v";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0715 S0715-Feb16-13-55-22 2007-02-16 15:12:10.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 1 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Joint Explanation Experimental WRITE-IMPLICIT-EQN S0715 S0715-Feb16-13-55-22 2007-02-16 15:12:48.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 2 INCORRECT 4 "v_y^2=v0_y^2 + 2*a_y*d_y" Undefined variables: (v0_y a_y) 1 Joint Explanation Experimental WRITE-IMPLICIT-EQN S0715 S0715-Feb16-13-55-22 2007-02-16 15:13:09.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 3 CORRECT 5 "v=0" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= v_ELECTRON_1 0) S0715 S0715-Feb16-13-55-22 2007-02-16 15:13:43.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 14 INCORRECT Var-14 label="g";quant=gravitational-acceleration;subtype=NIL;body=electron;agent=NIL;time=NIL;value="0" Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:13:43.0 US/Eastern DELETION ELEC* ELEC3A Var-14 Delete label=g Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:14:02.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 15 INCORRECT Var-15 label="g";quant=gravitational-acceleration;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.8 m/s^2" Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:14:02.0 US/Eastern DELETION ELEC* ELEC3A Var-15 Delete label=g Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:14:30.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 16 INCORRECT Var-16 label="g";quant=gravitational-acceleration;subtype=NIL;body=electron;agent=NIL;time=NIL;value="0 m/s^2" Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:14:34.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 17 HINT Var-16 label=g Although you can always define a gravitational-acceleration variable, none are needed for any solution I know of this problem. 1 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:14:34.0 US/Eastern DELETION ELEC* ELEC3A Var-16 Delete label=g Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:14:44.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 18 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:14:49.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 19 HINT Try choosing a particular kinematic equation containing the y component of the velocity of the electron at T1. 2 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:16:17.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 20 INCORRECT 6 "d_y=v_y*t" Undefined variable: t 1 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:16:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 21 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:17:03.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 22 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:17:06.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 23 HINT Try choosing a particular kinematic equation containing the y component of the velocity of the electron at T1. 2 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:17:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 24 HINT Try drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 3 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:17:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 25 HINT Notice that the electron is moving in a straight line at T1. 4 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:17:23.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 26 HINT Whenever an object is moving in a straight line, it has a velocity in the same direction as its motion. 5 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:17:26.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 27 HINT Because the electron is moving in a straight line at T1, draw a non-zero vector in direction 90 degrees. 6 6 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT 8 S0715 S0715-Feb16-13-55-22 2007-02-16 15:18:01.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 28 CORRECT Vector-17 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=106 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:18:01.0 US/Eastern DELETION ELEC* ELEC3A 6 Delete Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:18:40.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0715 S0715-Feb16-13-55-22 2007-02-16 15:19:15.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT 6 "d_y=v_y*t" Undefined variable: t 1 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0715 S0715-Feb16-13-55-22 2007-02-16 15:20:28.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT 7 "F=abs(qe)*E" Undefined variable: F 1 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP 7 S0715 S0715-Feb16-13-55-22 2007-02-16 15:20:40.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0715 S0715-Feb16-13-55-22 2007-02-16 15:20:43.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT Try choosing a particular kinematic equation containing the y component of the velocity of the electron at T1. 2 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0715 S0715-Feb16-13-55-22 2007-02-16 15:20:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT Try drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 3 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0715 S0715-Feb16-13-55-22 2007-02-16 15:20:47.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 HINT Notice that the electron is moving in a straight line and speeding up from T0 to T1 4 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0715 S0715-Feb16-13-55-22 2007-02-16 15:20:49.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG MINILESSON ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 HINT mini_speedup_accel.htm 5 5 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0715 S0715-Feb16-13-55-22 2007-02-16 15:20:59.0 US/Eastern HINT_REQUEST Choose- HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 HINT close-lesson Do you wish for more hints? 6 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0715 S0715-Feb16-13-55-22 2007-02-16 15:21:04.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 10 HINT Because the electron is speeding up while moving in a straight line with direction 90 degrees, you should use the acceleration tool to draw an acceleration for it from T0 to T1 at direction 90 degrees. 7 7 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP 2 S0715 S0715-Feb16-13-55-22 2007-02-16 15:21:32.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 11 CORRECT Vector-18 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=105 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP 3 S0715 S0715-Feb16-13-55-22 2007-02-16 15:22:17.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A CALC_REQUEST 1 INCORRECT 8 "a=0 m/s^2" Joint Explanation Experimental 2 (= a_ELECTRON_12 (DNUM 0 m/s^2)) S0715 S0715-Feb16-13-55-22 2007-02-16 15:22:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A CALC_REQUEST 2 INCORRECT 8 "a=9.8 m/s^2" Joint Explanation Experimental (= a_ELECTRON_12 (DNUM 9.8 m/s^2)) S0715 S0715-Feb16-13-55-22 2007-02-16 15:22:30.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A CALC_REQUEST 3 HINT 8 9.8 m/s^2 is not the correct value for a, the magnitude of the acceleration of the electron from T0 to T1. It will usually be easier to leave the symbol a in your solution equations and let Andes do all calculations. Use the 'Solve For' command to compute the final answer when you have entered enough equations to determine it. 1 1 Joint Explanation Experimental -3 S0715 S0715-Feb16-13-55-22 2007-02-16 15:22:46.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 4 INCORRECT 9 "a" Unable to solve for a. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:22:54.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO S0715 S0715-Feb16-13-55-22 2007-02-16 15:22:56.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 2 HINT Your goal should be writing a constant acceleration equation in terms of vector components along the Y axis. 2 Joint Explanation Experimental WRITE-LK-NO-T-COMPO S0715 S0715-Feb16-13-55-22 2007-02-16 15:23:00.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 3 HINT Do you know an equation relating the components of initial velocity, final velocity, acceleration, and displacement when acceleration is constant? 3 Joint Explanation Experimental WRITE-LK-NO-T-COMPO S0715 S0715-Feb16-13-55-22 2007-02-16 15:23:07.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 4 HINT Write the equation vf_y ^ 2 = 0 + (2 * a_y * d_y) 4 4 Joint Explanation Experimental WRITE-LK-NO-T-COMPO -8 S0715 S0715-Feb16-13-55-22 2007-02-16 15:23:34.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 5 CORRECT 9 "vf_y^2=0+(2*a_y*d_y)" Joint Explanation Experimental WRITE-LK-NO-T-COMPO 4 (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* (* 2 Yc_a_ELECTRON_12_0) Yc_s_ELECTRON_12_0))) S0715 S0715-Feb16-13-55-22 2007-02-16 15:23:49.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Why don't you continue with the solution by working on applying Newton's second law to the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:23:56.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Try drawing a free-body diagram for the electron from T0 to T1. 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:24:00.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Try drawing all the forces acting on the electron from T0 to T1. 3 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:24:02.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Think about how the direction of the electric force on the electron due to the plates is related to the direction of the electric field vector. 4 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:24:42.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 5 INCORRECT Vector-19 label="Fw";type=Force;body=electron;agent=Unspecified;forcetype=grav;time=T0 to T1;dir=270;mag=118 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:24:48.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT Vector-19 label=Fw Andes' solution does not mention any forces on the electron due to an unspecified agent, nor any weight forces on the electron. Either this force does not exist or it is not needed for solving this problem. 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:24:48.0 US/Eastern DELETION ELEC* ELEC3A Vector-19 Delete label=Fw Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:25:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 7 INCORRECT Vector-20 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=270;mag=113 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:25:45.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 8 HINT Vector-20 label=F Do you really want the direction of that vector to be 270 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:25:48.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 9 HINT Think about how the direction of the electric force on the electron due to the plates is related to the direction of the electric field vector. 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:25:50.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 10 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 3 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:25:54.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 11 HINT Because the charge of the electron is negative, use the force drawing tool (labeled F) to draw the electric force on the electron due to the plates in the opposite direction as the electric field at that location, namely 90 degrees. 4 4 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR -1 S0715 S0715-Feb16-13-55-22 2007-02-16 15:26:07.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 12 CORRECT Vector-20 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=113 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:26:12.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 1 HINT Why don't you continue working on applying Newton's second law to the electron from T0 to T1. 1 Joint Explanation Experimental WRITE-NSL-COMPO S0715 S0715-Feb16-13-55-22 2007-02-16 15:26:15.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 2 HINT You can apply Newton's second law to the electron. Note that the electron is accelerating from T0 to T1. 2 Joint Explanation Experimental WRITE-NSL-COMPO S0715 S0715-Feb16-13-55-22 2007-02-16 15:26:18.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 3 HINT Newton's second law F = m*a states that the net force on an object = the object's mass times its acceleration. Because the net force is the vector sum of all forces on the object, this can be applied component-wise to relate the sum of the force components in any direction to the mass times the component of acceleration in that direction. 3 Joint Explanation Experimental WRITE-NSL-COMPO S0715 S0715-Feb16-13-55-22 2007-02-16 15:26:25.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 4 HINT Write Newton's second law in terms of component variables along the y axis as F_y = me * a_y 4 4 Joint Explanation Experimental WRITE-NSL-COMPO -6 S0715 S0715-Feb16-13-55-22 2007-02-16 15:26:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 5 CORRECT 10 "F_y=me*a_y" Joint Explanation Experimental WRITE-NSL-COMPO 6 (= Yc_Fe_ELECTRON_PLATES_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0)) S0715 S0715-Feb16-13-55-22 2007-02-16 15:26:58.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 HINT Why don't you continue with the solution by working on applying the definition of electric field magnitude at the electron from T0 to T1. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0715 S0715-Feb16-13-55-22 2007-02-16 15:27:04.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 2 HINT What is the relationship between the force, the charge and the electric field? 2 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0715 S0715-Feb16-13-55-22 2007-02-16 15:27:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 3 HINT The electric field vector at a location is defined as electric force vector per unit charge. That is, the electric force vector that a test charge would undergo if placed there, divided by the size of the charge. This definition can be applied to relate force and field magnitudes. 3 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0715 S0715-Feb16-13-55-22 2007-02-16 15:27:13.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 4 HINT Write the equation F = (ABS qe) * E 4 4 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 1 S0715 S0715-Feb16-13-55-22 2007-02-16 15:27:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 5 CORRECT 7 "F=abs(qe)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 13 (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES)) S0715 S0715-Feb16-13-55-22 2007-02-16 15:27:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A CALC_REQUEST 5 INCORRECT 8 "a=9.8 m/s^2" Joint Explanation Experimental 12 (= a_ELECTRON_12 (DNUM 9.8 m/s^2)) S0715 S0715-Feb16-13-55-22 2007-02-16 15:27:27.0 US/Eastern DELETION ELEC* ELEC3A 8 Delete Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:27:45.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 6 CORRECT 8 "v" Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:27:58.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 7 INCORRECT 11 "vf" Unable to solve for vf. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:28:05.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the velocity of the electron at T1 onto the y axis. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0715 S0715-Feb16-13-55-22 2007-02-16 15:28:08.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 2 HINT Since the velocity of the electron at T1 at T1 lies along the y axis, it has a non-zero component along that axis. 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0715 S0715-Feb16-13-55-22 2007-02-16 15:28:11.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0715 S0715-Feb16-13-55-22 2007-02-16 15:28:17.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 4 HINT Since the velocity of the electron at T1 at T1 lies along the y axis and points in the + y direction, write the equation vf_y = vf. 4 4 Joint Explanation Experimental COMPO-PARALLEL-AXIS 7 S0715 S0715-Feb16-13-55-22 2007-02-16 15:28:31.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 5 INCORRECT 11 "vf_y+vf" Syntax error in vf_y+vf 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS ? S0715 S0715-Feb16-13-55-22 2007-02-16 15:28:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 6 CORRECT 11 "vf_y=vf" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_v_ELECTRON_2_0 v_ELECTRON_2) S0715 S0715-Feb16-13-55-22 2007-02-16 15:28:52.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 8 INCORRECT 12 "vf" Unable to solve for vf. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:28:59.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the electric force on the electron from T0 to T1 due to the plates onto the y axis. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0715 S0715-Feb16-13-55-22 2007-02-16 15:29:03.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 2 HINT Since the electric force on the electron from T0 to T1 due to the plates from T0 to T1 lies along the y axis, it has a non-zero component along that axis. 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0715 S0715-Feb16-13-55-22 2007-02-16 15:29:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0715 S0715-Feb16-13-55-22 2007-02-16 15:29:06.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 4 HINT Since the electric force on the electron from T0 to T1 due to the plates from T0 to T1 lies along the y axis and points in the + y direction, write the equation F_y = F. 4 4 Joint Explanation Experimental COMPO-PARALLEL-AXIS 2 S0715 S0715-Feb16-13-55-22 2007-02-16 15:29:36.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 5 CORRECT 12 "F_y=F" Joint Explanation Experimental COMPO-PARALLEL-AXIS 3 (= Yc_Fe_ELECTRON_PLATES_12_0 Fe_ELECTRON_PLATES_12) S0715 S0715-Feb16-13-55-22 2007-02-16 15:29:39.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the displacement of the electron from T0 to T1 onto the y axis. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0715 S0715-Feb16-13-55-22 2007-02-16 15:29:42.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 2 HINT Since the displacement of the electron from T0 to T1 from T0 to T1 lies along the y axis, it has a non-zero component along that axis. 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0715 S0715-Feb16-13-55-22 2007-02-16 15:29:44.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0715 S0715-Feb16-13-55-22 2007-02-16 15:29:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 4 HINT Since the displacement of the electron from T0 to T1 from T0 to T1 lies along the y axis and points in the + y direction, write the equation d_y = d. 4 4 Joint Explanation Experimental COMPO-PARALLEL-AXIS -2 S0715 S0715-Feb16-13-55-22 2007-02-16 15:29:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 5 CORRECT 13 "d_y=d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_s_ELECTRON_12_0 s_ELECTRON_12) S0715 S0715-Feb16-13-55-22 2007-02-16 15:29:57.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A CALC_REQUEST 9 HINT You have completed all of the principle applications necessary to solve this problem. Right click in the first empty line in the equation pane and use 'Solve For...' to find a value for the sought quantity (if you have not already) and then enter that value in the answer box. 1 1 Joint Explanation Experimental -7 S0715 S0715-Feb16-13-55-22 2007-02-16 15:30:06.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 10 CORRECT 14 "vf" Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:30:19.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 INCORRECT Answer-1 "1.02e+7 m/s" Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:30:36.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 2 CORRECT Answer-1 "1.03e+7 m/s" Joint Explanation Experimental 15 S0715 S0715-Feb16-13-55-22 2007-02-16 15:41:00.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-667 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 15 S0715 S0715-Feb16-13-55-22 2007-02-16 15:41:19.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-668 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 25 S0715 S0715-Feb16-13-55-22 2007-02-16 15:41:32.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 2 INCORRECT System-669 label="E";body=earth;time=NIL Joint Explanation Experimental DRAW-BODY 23 S0715 S0715-Feb16-13-55-22 2007-02-16 15:42:24.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-670 label="E";type=E-field;body=region;agent=earth;time=NIL;dir=90;mag=112 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 22 S0715 S0715-Feb16-13-55-22 2007-02-16 15:42:24.0 US/Eastern DELETION ELEC* ELEC6A Vector-670 Delete label=E Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:42:47.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 INCORRECT Vector-671 label="E";type=E-field;body=region;agent=earth;time=NIL;dir=270;mag=158 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:42:51.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 HINT Vector-671 label=E Is the earth the source of the electric field you are defining? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:43:02.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 CORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=158 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:43:59.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-672 label="F";type=Force;body=electron;agent=earth;forcetype=Electric;time=T0 to T1;dir=270;mag=147 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:44:01.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Vector-672 label=F Is the force is due to the earth? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:44:10.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT Vector-672 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=270;mag=147 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:44:13.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Vector-672 label=F Do you really want the direction of that vector to be 270 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:44:29.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 5 CORRECT Vector-672 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=147 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0715 S0715-Feb16-13-55-22 2007-02-16 15:45:09.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-673 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=71 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0715 S0715-Feb16-13-55-22 2007-02-16 15:45:16.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 0 "vi=4.30 m/s" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 26 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0715 S0715-Feb16-13-55-22 2007-02-16 15:45:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 1 "E=4.00e-12 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 30 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0715 S0715-Feb16-13-55-22 2007-02-16 15:45:41.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= g_EARTH (DNUM 9.8 m/s^2))) 1 CORRECT 2 "g=9.8 m/s^2" Joint Explanation Experimental WRITE-G-ON-EARTH 31 (= g_EARTH (DNUM 9.8 m/s^2)) S0715 S0715-Feb16-13-55-22 2007-02-16 15:46:29.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-674 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=83 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN S0715 S0715-Feb16-13-55-22 2007-02-16 15:46:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 INCORRECT 3 "F_y=m*a_y" Undefined variable: m 1 Joint Explanation Experimental DEFINE-MASS S0715 S0715-Feb16-13-55-22 2007-02-16 15:47:06.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 2 CORRECT Var-675 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 34 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0715 S0715-Feb16-13-55-22 2007-02-16 15:47:09.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= m_ELECTRON (DNUM 9.11e-31 kg))) 1 INCORRECT 3 "F_y=m*a_y" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0)) S0715 S0715-Feb16-13-55-22 2007-02-16 15:47:10.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= m_ELECTRON (DNUM 9.11e-31 kg))) 2 INCORRECT 3 "F_y=m*a_y" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0)) S0715 S0715-Feb16-13-55-22 2007-02-16 15:47:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= m_ELECTRON (DNUM 9.11e-31 kg))) 3 CORRECT 4 "m=9.11e-31 kg" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= m_ELECTRON (DNUM 9.11e-31 kg)) S0715 S0715-Feb16-13-55-22 2007-02-16 15:47:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A 3 1 INCORRECT 3 "F_y=m*a_y" Joint Explanation Experimental (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0)) S0715 S0715-Feb16-13-55-22 2007-02-16 15:47:29.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC6A 3 2 HINT 3 What equation do you wish to write? 1 Joint Explanation Experimental S0715 S0715-Feb16-13-55-22 2007-02-16 15:48:13.0 US/Eastern HINT_REQUEST Choose-Equation HINT_MSG Whats-Wrong ELEC* ELEC6A Unknown 1 HINT (nsl ((?axis . y))) Equations of that type appear within the problem solution. You should write the equation in the form F1_y + F2_y + ... = m*a_y using your own variables. If you do not want to write this equation and are not sure what to do, why don't you call Light-Bulb-Help. 2 2 Joint Explanation Experimental 29 S0715 S0715-Feb16-13-55-22 2007-02-16 15:48:43.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A 5 1 INCORRECT 5 "F1_y+F2_y=m*a_y" Undefined variables: (F1_y F2_y) 1 Joint Explanation Experimental S0716 S0716-Feb19-09-04-49 2007-02-19 09:13:09.0 US/Eastern DELETION FOR* FOR4C Vector-1 Delete label=NIL Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 09:13:09.0 US/Eastern DELETION FOR* FOR4C Axes-2 Delete label=NIL Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 09:14:21.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 1 CORRECT Axes-3 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 15 S0716 S0716-Feb19-09-04-49 2007-02-19 09:14:51.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 INCORRECT Vector-4 label="E";type=E-field;body=region;agent=particle;time=NIL;dir=22;mag=159 Self-explanation Control DRAW-FIELD-GIVEN-DIR 12 S0716 S0716-Feb19-09-04-49 2007-02-19 09:15:05.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 CORRECT Vector-4 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=159 Self-explanation Control DRAW-FIELD-GIVEN-DIR 13 S0716 S0716-Feb19-09-04-49 2007-02-19 09:15:40.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 1 CORRECT System-5 label="x";body=particle;time=NIL Self-explanation Control DRAW-BODY 24 S0716 S0716-Feb19-09-04-49 2007-02-19 09:16:16.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 CORRECT Var-6 label="x";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6C" Self-explanation Control DEFINE-CHARGE 32 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0716 S0716-Feb19-09-04-49 2007-02-19 09:16:33.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 3 CORRECT Vector-4 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=159 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:16:59.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 0 "E=14.3e+3 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 39 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0716 S0716-Feb19-09-04-49 2007-02-19 09:17:54.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 1 INCORRECT 1 "E=Fx" Undefined variable: Fx 1 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0716 S0716-Feb19-09-04-49 2007-02-19 09:18:01.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 2 HINT Vector-7 label=F Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0716 S0716-Feb19-09-04-49 2007-02-19 09:19:21.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 3 CORRECT Vector-7 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=202;mag=99 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0716 S0716-Feb19-09-04-49 2007-02-19 09:19:28.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 1 INCORRECT 1 "E=F*x" Units are inconsistent. 1 1 Self-explanation Control COMPO-GENERAL-CASE 38 (= E_REGION_UNSPECIFIED (* Fnet_PARTICLE_1 Q_PARTICLE)) S0716 S0716-Feb19-09-04-49 2007-02-19 09:19:42.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 2 INCORRECT 1 "E=F/x" Self-explanation Control COMPO-GENERAL-CASE (= E_REGION_UNSPECIFIED (/ Fnet_PARTICLE_1 Q_PARTICLE)) S0716 S0716-Feb19-09-04-49 2007-02-19 09:19:42.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 1 INCORRECT 1 "E=F/x" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO (= E_REGION_UNSPECIFIED (/ Fnet_PARTICLE_1 Q_PARTICLE)) S0716 S0716-Feb19-09-04-49 2007-02-19 09:19:42.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= (+ Yc_Fe_PARTICLE_UNSPECIFIED_1_0) Yc_Fnet_PARTICLE_1_0)) 1 INCORRECT 1 "E=F/x" Self-explanation Control WRITE-NET-FORCE-COMPO (= E_REGION_UNSPECIFIED (/ Fnet_PARTICLE_1 Q_PARTICLE)) S0716 S0716-Feb19-09-04-49 2007-02-19 09:19:42.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fnet_PARTICLE_1_0 (* Fnet_PARTICLE_1 (SIN (- (DNUM 202 deg) (DNUM 0 deg)))))) 1 INCORRECT 1 "E=F/x" Self-explanation Control COMPO-GENERAL-CASE (= E_REGION_UNSPECIFIED (/ Fnet_PARTICLE_1 Q_PARTICLE)) S0716 S0716-Feb19-09-04-49 2007-02-19 09:21:36.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 2 CORRECT System-5 label="q";body=particle;time=NIL Self-explanation Control DRAW-BODY S0716 S0716-Feb19-09-04-49 2007-02-19 09:21:49.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 CORRECT Var-6 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6C" Self-explanation Control DEFINE-CHARGE (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0716 S0716-Feb19-09-04-49 2007-02-19 09:23:13.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 INCORRECT 1 "F_x=F*cos($qF)" Undefined variable: F_x 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:23:17.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT Vector-4 label=F The variable: F_x may be defined by drawing coordinate axes. 2 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:23:52.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 CORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=99 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:23:54.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 INCORRECT 1 "F_x=F*cos($qF)" Undefined variable: F_x 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0716 S0716-Feb19-09-04-49 2007-02-19 09:24:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 2 HINT 1 The variable: F_x may be defined by drawing coordinate axes. 2 2 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0716 S0716-Feb19-09-04-49 2007-02-19 09:25:24.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 3 CORRECT 1 "F=abs(q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 73 (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED)) S0716 S0716-Feb19-09-04-49 2007-02-19 09:25:41.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 2 "F" Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 09:25:53.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 INCORRECT Answer-1 "0.11N" Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 09:26:00.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 2 CORRECT Answer-1 "0.113N" Self-explanation Control 96 S0716 S0716-Feb19-09-04-49 2007-02-19 09:34:28.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="N";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 S0716 S0716-Feb19-09-04-49 2007-02-19 09:34:45.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 2 CORRECT System-667 label="qe";body=electron;time=NIL Self-explanation Control DRAW-BODY S0716 S0716-Feb19-09-04-49 2007-02-19 09:35:01.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-668 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19C" Self-explanation Control DEFINE-CHARGE 22 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0716 S0716-Feb19-09-04-49 2007-02-19 09:35:21.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-669 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31kg" Self-explanation Control DEFINE-MASS 30 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0716 S0716-Feb19-09-04-49 2007-02-19 09:36:27.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 INCORRECT Vector-670 label="wt";type=Force;body=electron;agent=Unspecified;forcetype=grav;time=T0;dir=270;mag=111 Self-explanation Control DRAW-WEIGHT 29 S0716 S0716-Feb19-09-04-49 2007-02-19 09:36:40.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 2 HINT Vector-670 label=wt Is the force is due to an unspecified agent? 1 Self-explanation Control DRAW-BODY S0716 S0716-Feb19-09-04-49 2007-02-19 09:36:42.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (BODY ELECTRON TIME NIL) 3 HINT Forces are caused by interacting objects. The force can either be a field force, such as weight, in which case the objects do not have to touch. Or the force is a contact force, such as tension or friction, in which case the objects must touch. 2 Self-explanation Control DRAW-BODY S0716 S0716-Feb19-09-04-49 2007-02-19 09:37:06.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 4 INCORRECT System-671 label="Earth";body=earth;time=NIL Self-explanation Control DRAW-BODY 28 S0716 S0716-Feb19-09-04-49 2007-02-19 09:37:25.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 3 CORRECT Vector-670 label="wt";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=111 Self-explanation Control DRAW-WEIGHT 29 S0716 S0716-Feb19-09-04-49 2007-02-19 09:37:30.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (DRAW-AXES 0) 1 HINT System-671 label=Earth The closest matching CORRECT entry seems to be done already, so you really don't need to generate it again. If you want to anyway, click on Explain more. 1 Self-explanation Control DRAW-COMPO-FORM-AXES S0716 S0716-Feb19-09-04-49 2007-02-19 09:37:37.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (DRAW-AXES 0) 2 HINT You don't need to draw the earth to solve this problem. You should focus your attention on the other body (or bodies). 2 2 Self-explanation Control DRAW-COMPO-FORM-AXES 24 S0716 S0716-Feb19-09-04-49 2007-02-19 09:37:37.0 US/Eastern DELETION ELEC* ELEC1C System-671 Delete label=Earth Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 09:38:15.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 3 CORRECT Axes-672 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-COMPO-FORM-AXES 34 S0716 S0716-Feb19-09-04-49 2007-02-19 09:39:29.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 INCORRECT Vector-673 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=NIL;mag=120 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 33 S0716 S0716-Feb19-09-04-49 2007-02-19 09:39:32.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 HINT Vector-673 label=F Do you really want the direction of that vector to be unknown? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:39:37.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 HINT Think about how the direction of the electric force on the electron due to an unspecified agent is related to the direction of the electric field vector. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:39:44.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:40:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 INCORRECT Vector-674 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=NIL;mag=123 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:40:52.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 2 INCORRECT Vector-673 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=NIL;mag=120 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:40:55.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 3 HINT Vector-673 label=F Do you really want the direction of that vector to be unknown? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:41:00.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 4 HINT Think about how the direction of the electric force on the electron due to an unspecified agent is related to the direction of the electric field vector. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:41:02.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 5 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:41:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 6 HINT Because the charge of the electron is negative, use the force drawing tool (labeled F) to draw the electric force on the electron due to an unspecified agent in the opposite direction as the electric field at that location, namely 90 degrees. 4 4 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 28 S0716 S0716-Feb19-09-04-49 2007-02-19 09:41:59.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 7 INCORRECT Vector-673 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=NIL;mag=120 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:42:02.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 HINT 0 Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0716 S0716-Feb19-09-04-49 2007-02-19 09:42:18.0 US/Eastern CANCEL ELEC* ELEC1C Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 09:42:42.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 INCORRECT 0 "E=abs(qe)*F" Units are inconsistent. 1 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 27 (= E_REGION_UNSPECIFIED (* (ABS Q_ELECTRON) Fe_ELECTRON_UNSPECIFIED_1)) S0716 S0716-Feb19-09-04-49 2007-02-19 09:43:18.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 3 CORRECT 0 "F=abs(qe)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 62 (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0716 S0716-Feb19-09-04-49 2007-02-19 09:44:03.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 8 CORRECT Vector-673 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=120 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:44:11.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 CORRECT Vector-674 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=123 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:44:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 CORRECT 1 "F=wt" Self-explanation Control COMPO-ZERO-VECTOR (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0716 S0716-Feb19-09-04-49 2007-02-19 09:44:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 1 "F=wt" Self-explanation Control COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0716 S0716-Feb19-09-04-49 2007-02-19 09:44:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 1 "F=wt" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0716 S0716-Feb19-09-04-49 2007-02-19 09:44:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 1 "F=wt" Self-explanation Control COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0716 S0716-Feb19-09-04-49 2007-02-19 09:44:40.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 INCORRECT 2 "E" Unable to solve for E. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 09:45:45.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 1 INCORRECT Vector-676 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T0;dir=270;mag=116 Self-explanation Control ACCEL-AT-REST S0716 S0716-Feb19-09-04-49 2007-02-19 09:45:48.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 HINT Vector-676 label=a Are you sure that vector has a non-zero magnitude? 1 Self-explanation Control WT-LAW S0716 S0716-Feb19-09-04-49 2007-02-19 09:45:58.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 2 HINT Notice that the electron is at rest at T0. 2 Self-explanation Control ACCEL-AT-REST S0716 S0716-Feb19-09-04-49 2007-02-19 09:46:04.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 3 HINT If a body is at rest throughout some time interval, its average acceleration during that interval is zero. 3 Self-explanation Control ACCEL-AT-REST S0716 S0716-Feb19-09-04-49 2007-02-19 09:46:04.0 US/Eastern DELETION ELEC* ELEC1C Vector-676 Delete label=a Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 09:46:04.0 US/Eastern DELETION ELEC* ELEC1C Var-677 Delete label=NIL Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 09:46:39.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 4 INCORRECT 1 "wt=mg" Undefined variable: mg 1 Self-explanation Control WT-LAW S0716 S0716-Feb19-09-04-49 2007-02-19 09:46:47.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 5 INCORRECT 1 "wt=m*g" Undefined variable: m 1 Self-explanation Control WT-LAW S0716 S0716-Feb19-09-04-49 2007-02-19 09:46:58.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 6 CORRECT 1 "wt=me*g" Self-explanation Control WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0716 S0716-Feb19-09-04-49 2007-02-19 09:47:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 2 CORRECT 2 "0=F-wt" Self-explanation Control COMPO-ZERO-VECTOR (= 0 (- Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0716 S0716-Feb19-09-04-49 2007-02-19 09:47:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 2 CORRECT 2 "0=F-wt" Self-explanation Control COMPO-PARALLEL-AXIS (= 0 (- Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0716 S0716-Feb19-09-04-49 2007-02-19 09:47:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 2 CORRECT 2 "0=F-wt" Self-explanation Control WRITE-NET-FORCE-COMPO (= 0 (- Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0716 S0716-Feb19-09-04-49 2007-02-19 09:47:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 2 CORRECT 2 "0=F-wt" Self-explanation Control COMPO-PARALLEL-AXIS (= 0 (- Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0716 S0716-Feb19-09-04-49 2007-02-19 09:47:32.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 2 CORRECT 3 "E" Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 09:47:51.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 INCORRECT Answer-1 "-5.580e-11 N/C" Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 09:47:57.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 2 CORRECT Answer-1 "5.580e-11 N/C" Self-explanation Control 85 S0716 S0716-Feb19-09-04-49 2007-02-19 09:58:01.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 CORRECT System-1 label="qe";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 S0716 S0716-Feb19-09-04-49 2007-02-19 09:58:58.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 INCORRECT Var-2 label="d";quant=distance;subtype=NIL;body=plates;agent=NIL;time=T0;value="1.50cm" Self-explanation Control DRAW-FIELD-GIVEN-DIR 12 S0716 S0716-Feb19-09-04-49 2007-02-19 09:59:01.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 2 HINT Var-2 label=d Although you can always define a distance variable, none are needed for any solution I know of this problem. 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:59:37.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 3 INCORRECT Vector-3 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=79 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 09:59:49.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 4 CORRECT Vector-3 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=79 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 10:00:14.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-4 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=71 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 10:00:18.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Vector-4 label=Fe Is the force is due to an unspecified agent? 1 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0716 S0716-Feb19-09-04-49 2007-02-19 10:00:23.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Forces are caused by interacting objects. The force can either be a field force, such as weight, in which case the objects do not have to touch. Or the force is a contact force, such as tension or friction, in which case the objects must touch. 2 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0716 S0716-Feb19-09-04-49 2007-02-19 10:00:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT Vector-4 label="Fe";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0;dir=90;mag=71 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0716 S0716-Feb19-09-04-49 2007-02-19 10:00:49.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Vector-4 label="Fe";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0;dir=90;mag=71 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 11 S0716 S0716-Feb19-09-04-49 2007-02-19 10:01:03.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Vector-4 label=Fe You don't need to draw the force at T0. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-ACCEL-SPEED-UP S0716 S0716-Feb19-09-04-49 2007-02-19 10:01:54.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-5 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=49 Self-explanation Control DRAW-ACCEL-SPEED-UP 12 S0716 S0716-Feb19-09-04-49 2007-02-19 10:02:19.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 CORRECT Vector-6 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=63 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0716 S0716-Feb19-09-04-49 2007-02-19 10:02:52.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-7 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19C" Self-explanation Control DEFINE-CHARGE 16 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0716 S0716-Feb19-09-04-49 2007-02-19 10:03:08.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-8 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31kg" Self-explanation Control DEFINE-MASS 20 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:03:57.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A CALC_REQUEST 1 INCORRECT 0 "Fe=abs(qe)*E" The variable Fe is not used in any solution I know of. 1 Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:04:37.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A CALC_REQUEST 2 INCORRECT 1 "Fe=me*a" The variable Fe is not used in any solution I know of. 1 Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:04:52.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 3 INCORRECT 2 "Fe" Unable to solve for Fe. One thing you probably need is an equation specifying the given value of E. 1 Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:05:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 2 "E=2.00e+4 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 24 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:05:18.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 4 INCORRECT 3 "Fe" Unable to solve for Fe. One thing you probably need is an equation specifying the given value of the magnitude of the displacement of the electron from T0 to T1. 1 1 Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:06:18.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 5 INCORRECT 3 "a" Unable to solve for a. One thing you probably need is an equation specifying the given value of the magnitude of the displacement of the electron from T0 to T1. 1 1 Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:08:38.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (DRAW-AXES 0) 1 HINT Vector-2 label=F It is now a good idea for you to draw an axis. This will help to ground your work and be useful later on in the process. 1 Self-explanation Control DRAW-UNROTATED-AXES S0716 S0716-Feb19-09-04-49 2007-02-19 10:08:54.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 2 CORRECT Axes-9 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 34 S0716 S0716-Feb19-09-04-49 2007-02-19 10:08:58.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Var-7 label=s You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0716 S0716-Feb19-09-04-49 2007-02-19 10:08:58.0 US/Eastern DELETION ELEC* ELEC3A Var-2 Delete label=d Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:09:49.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-10 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=58 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0716 S0716-Feb19-09-04-49 2007-02-19 10:09:56.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 4 "d=1.50cm" Self-explanation Control WRITE-KNOWN-VALUE-EQN 38 (= s_ELECTRON_12 (DNUM 1.5 cm)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:10:10.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Vector-4 label=Fe You don't need to draw the force at T0. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 10:10:29.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 4 CORRECT Vector-4 label="Fe";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=71 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 10:10:40.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 6 INCORRECT 5 "Fe" Unable to solve for Fe. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:11:40.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 10:12:00.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT #.(wb-quant '(define-variable "v" |instantaneous| |velocity| |electron| |T1| |NIL| NIL "") 'mag) Very good. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 10:12:22.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 7 HINT (lk-no-vf ((?axis . x))) No application of that principle on the X axis appear in a solution to this problem. However, that principle can be applied on the Y axis. Unfortunately, they cannot be used to start the solution. What is the first principle application that you wish to work on? You should look for a principle that is related to the sought quantity indirectly. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 10:12:32.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 8 HINT (lk-no-vf ((?axis . y))) That principle is part of a valid solution to this problem but you cannot use it as the first principle. Lets just assume that you will work on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 4 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 10:12:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 9 HINT A good step would be choosing a particular kinematic equation containing the y component of the velocity of the electron at T1. 5 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 10:13:32.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 10 CORRECT Vector-4 label="Fe_y";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=71 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 10:13:40.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 CORRECT 0 "Fe_y=abs(qe)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 50 (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:13:41.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 1 "Fe_y=me*a" Self-explanation Control (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:13:46.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT 3 "d=v_0*t+0.5*a*t^2" Undefined variables: (v_0 t t) 1 Self-explanation Control DRAW-ACCEL-SPEED-UP S0716 S0716-Feb19-09-04-49 2007-02-19 10:14:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 CORRECT Vector-5 label="a_y";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=49 Self-explanation Control DRAW-ACCEL-SPEED-UP S0716 S0716-Feb19-09-04-49 2007-02-19 10:14:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 2 TRUE_BUT_IRRELEVANT 1 "Fe_y=me*a_y" Self-explanation Control (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:14:25.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 INCORRECT 5 "v_0=0" Undefined variable: v_0 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0716 S0716-Feb19-09-04-49 2007-02-19 10:14:55.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 2 CORRECT Vector-11 label="v0_y";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0716 S0716-Feb19-09-04-49 2007-02-19 10:15:03.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 1 CORRECT 5 "v0_y=0" Self-explanation Control WRITE-IMPLICIT-EQN (= v_ELECTRON_1 0) S0716 S0716-Feb19-09-04-49 2007-02-19 10:15:10.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 1 INCORRECT 3 "d=v0_y*t+0.5*a_y*t^2" Undefined variables: (t t) 1 Self-explanation Control DEFINE-DURATION S0716 S0716-Feb19-09-04-49 2007-02-19 10:15:33.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 2 CORRECT Var-12 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Self-explanation Control DEFINE-DURATION S0716 S0716-Feb19-09-04-49 2007-02-19 10:15:36.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 3 TRUE_BUT_IRRELEVANT 3 "d=v0_y*t+0.5*a_y*t^2" Self-explanation Control (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 a_ELECTRON_12) (^ t_12 2)))) S0716 S0716-Feb19-09-04-49 2007-02-19 10:15:45.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 7 CORRECT 6 "a_y" Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:16:01.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 8 CORRECT 7 "t" Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:17:18.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 4 TRUE_BUT_IRRELEVANT 8 "v^2= v0_y^2+2*a_y*d" Self-explanation Control (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0716 S0716-Feb19-09-04-49 2007-02-19 10:17:28.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 9 CORRECT 9 "v" Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:17:46.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.03e+7 m/s" Self-explanation Control 75 S0716 S0716-Feb19-09-04-49 2007-02-19 10:27:31.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="qe";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 S0716 S0716-Feb19-09-04-49 2007-02-19 10:27:36.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 25 S0716 S0716-Feb19-09-04-49 2007-02-19 10:27:52.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-669 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19C" Self-explanation Control DEFINE-CHARGE 29 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0716 S0716-Feb19-09-04-49 2007-02-19 10:28:04.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-670 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31kg" Self-explanation Control DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:28:20.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=125 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 10:28:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 0 "E=4.00e-12N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 36 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:28:56.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-672 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=55 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0716 S0716-Feb19-09-04-49 2007-02-19 10:29:13.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-673 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0716 S0716-Feb19-09-04-49 2007-02-19 10:29:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 1 "vi=4.30 m/s" Self-explanation Control WRITE-KNOWN-VALUE-EQN 40 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:29:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 1 CORRECT 2 "vf=0" Self-explanation Control WRITE-IMPLICIT-EQN (= v_ELECTRON_2 0) S0716 S0716-Feb19-09-04-49 2007-02-19 10:29:30.0 US/Eastern DELETION ELEC* ELEC6A Vector-674 Delete label=NIL Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:31:18.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-675 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=57 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 10:31:40.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 3 "Fe=abs(qe)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 52 (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:32:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-676 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=53 Self-explanation Control DRAW-WEIGHT S0716 S0716-Feb19-09-04-49 2007-02-19 10:32:46.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-677 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=270;mag=38 Self-explanation Control DRAW-NET-FORCE-FROM-ACCEL S0716 S0716-Feb19-09-04-49 2007-02-19 10:32:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 1 INCORRECT 4 "F=Fe-Fg" Self-explanation Control COMPO-PARALLEL-AXIS 51 (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:32:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 1 INCORRECT 4 "F=Fe-Fg" Self-explanation Control COMPO-PARALLEL-AXIS 51 (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:32:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 1 INCORRECT 4 "F=Fe-Fg" Self-explanation Control WRITE-NET-FORCE-COMPO 51 (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:33:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 2 INCORRECT 4 "F=Fe+Fg" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (+ Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:33:10.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 3 INCORRECT 4 "F=Fe-Fg" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:33:10.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 2 INCORRECT 4 "F=Fe-Fg" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:33:10.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 2 INCORRECT 4 "F=Fe-Fg" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:33:12.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 HINT 4 You used F, which is the MAGNITUDE of the net force on the electron from T0 to T1. Is that what you intended? 1 Self-explanation Control DRAW-NET-FORCE-FROM-ACCEL S0716 S0716-Feb19-09-04-49 2007-02-19 10:33:20.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 3 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Self-explanation Control DRAW-NET-FORCE-FROM-ACCEL 46 S0716 S0716-Feb19-09-04-49 2007-02-19 10:33:58.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 4 CORRECT Vector-677 label="F_y";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=270;mag=38 Self-explanation Control DRAW-NET-FORCE-FROM-ACCEL S0716 S0716-Feb19-09-04-49 2007-02-19 10:34:02.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 4 INCORRECT 4 "F_y=Fe-Fg" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:34:02.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 3 INCORRECT 4 "F_y=Fe-Fg" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:34:02.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 3 INCORRECT 4 "F_y=Fe-Fg" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:34:13.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-675 label="Fe_y";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=57 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0716 S0716-Feb19-09-04-49 2007-02-19 10:34:18.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 5 CORRECT Vector-677 label="F_y";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=270;mag=38 Self-explanation Control DRAW-NET-FORCE-FROM-ACCEL S0716 S0716-Feb19-09-04-49 2007-02-19 10:34:32.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 2 INCORRECT Vector-676 label="Fg_y";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=272;mag=51 Self-explanation Control DRAW-WEIGHT S0716 S0716-Feb19-09-04-49 2007-02-19 10:34:37.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 5 INCORRECT 4 "F_y=Fe_y-Fg_g" Undefined variable: Fg_g 1 Self-explanation Control COMPO-PARALLEL-AXIS 45 S0716 S0716-Feb19-09-04-49 2007-02-19 10:34:43.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 6 INCORRECT 4 "F_y=Fe_y-Fg_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:34:43.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 4 INCORRECT 4 "F_y=Fe_y-Fg_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:34:43.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 4 INCORRECT 4 "F_y=Fe_y-Fg_y" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:34:55.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 3 HINT Vector-676 label=Fg_y Do you really want the direction of that vector to be 272 degrees? 1 Self-explanation Control DRAW-WEIGHT S0716 S0716-Feb19-09-04-49 2007-02-19 10:35:02.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 4 CORRECT Vector-676 label="Fg_y";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=51 Self-explanation Control DRAW-WEIGHT S0716 S0716-Feb19-09-04-49 2007-02-19 10:35:29.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 INCORRECT 5 "F_y= m*a" Undefined variables: (m a) 1 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0716 S0716-Feb19-09-04-49 2007-02-19 10:35:50.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 INCORRECT Vector-678 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=272;mag=35 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0716 S0716-Feb19-09-04-49 2007-02-19 10:35:59.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 3 CORRECT Vector-678 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=35 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0716 S0716-Feb19-09-04-49 2007-02-19 10:36:01.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 1 TRUE_BUT_IRRELEVANT 5 "F_y= me*a" Self-explanation Control (= Fnet_ELECTRON_12 (* m_ELECTRON a_ELECTRON_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:36:04.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 1 INCORRECT 6 "a" Unable to solve for a. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:36:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 CORRECT 3 "Fe_y=abs(qe)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:36:40.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 7 INCORRECT 4 "F_y=Fe_y-Fg_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:36:40.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 5 INCORRECT 4 "F_y=Fe_y-Fg_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:36:40.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 5 INCORRECT 4 "F_y=Fe_y-Fg_y" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:36:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 8 INCORRECT 4 "F_y=Fe_y-Fg_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:36:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 9 INCORRECT 4 "F_y=Fe_y-Fg_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:36:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 6 INCORRECT 4 "F_y=Fe_y-Fg_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:36:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 7 INCORRECT 4 "F_y=Fe_y-Fg_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:36:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 6 INCORRECT 4 "F_y=Fe_y-Fg_y" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:36:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 7 INCORRECT 4 "F_y=Fe_y-Fg_y" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:36:54.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 10 INCORRECT 4 "F_y=Fe_y - Fg_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:36:54.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 8 INCORRECT 4 "F_y=Fe_y - Fg_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:36:54.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 8 INCORRECT 4 "F_y=Fe_y - Fg_y" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:37:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 INCORRECT 6 "F_g=me*g" Undefined variable: F_g 1 Self-explanation Control WT-LAW S0716 S0716-Feb19-09-04-49 2007-02-19 10:37:55.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 2 CORRECT 6 "Fg_y=me*g" Self-explanation Control WT-LAW (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:38:03.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 2 CORRECT 7 "Fg_y" Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:38:16.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 3 CORRECT 8 "Fe_y" Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:38:33.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 4 INCORRECT 9 "F_y" Unable to solve for F_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:38:43.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC6A CALC_REQUEST 5 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:39:03.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A CALC_REQUEST 6 HINT #.(wb-quant '(define-variable "t" |NIL| |duration| |NIL| |T0 to T1| |NIL| NIL "") 'NIL) That quantity is not sought by the problem statement. 2 Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:39:11.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A CALC_REQUEST 7 HINT #.(wb-quant '(define-variable "s" |NIL| |distance| |electron| |T0 to T1| |NIL| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. 3 Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:39:23.0 US/Eastern CANCEL ELEC* ELEC6A Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:39:48.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 8 INCORRECT 9 "a" Unable to solve for a. Try the light-bulb if you need a hint about a step that still needs to be done. 1 Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:39:59.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 5 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-WEIGHT S0716 S0716-Feb19-09-04-49 2007-02-19 10:40:00.0 US/Eastern CANCEL ELEC* ELEC6A Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:40:06.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 6 CORRECT Vector-676 label="Fg_y";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=51 Self-explanation Control DRAW-WEIGHT S0716 S0716-Feb19-09-04-49 2007-02-19 10:40:17.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 6 CORRECT Vector-677 label="F_y";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=270;mag=38 Self-explanation Control DRAW-NET-FORCE-FROM-ACCEL S0716 S0716-Feb19-09-04-49 2007-02-19 10:40:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 2 TRUE_BUT_IRRELEVANT 4 "F_y=Fg_y-Fe_y" Self-explanation Control (= Fnet_ELECTRON_12 (- Fw_ELECTRON_EARTH_12 Fe_ELECTRON_UNSPECIFIED_12)) S0716 S0716-Feb19-09-04-49 2007-02-19 10:40:42.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 9 CORRECT 9 "a" Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:42:24.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-679 label="d";type=Displacement;body=electron;agent=NIL;time=T1;dir=90;mag=48 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0716 S0716-Feb19-09-04-49 2007-02-19 10:42:39.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Vector-679 label=d You don't need to draw the displacement at T1. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0716 S0716-Feb19-09-04-49 2007-02-19 10:42:52.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 CORRECT Vector-679 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=48 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0716 S0716-Feb19-09-04-49 2007-02-19 10:42:54.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 INCORRECT 10 "vf^2=vi^2+2*a*d" Self-explanation Control COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0716 S0716-Feb19-09-04-49 2007-02-19 10:42:54.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 INCORRECT 10 "vf^2=vi^2+2*a*d" Self-explanation Control WRITE-LK-NO-T-COMPO (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0716 S0716-Feb19-09-04-49 2007-02-19 10:42:54.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 INCORRECT 10 "vf^2=vi^2+2*a*d" Self-explanation Control COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0716 S0716-Feb19-09-04-49 2007-02-19 10:43:01.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A No Intepretation 3 HINT 10 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:43:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 4 TRUE_BUT_IRRELEVANT 10 "vf^2=vi^2+2*(-a)*d" Self-explanation Control (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 (- a_ELECTRON_12)) s_ELECTRON_12))) S0716 S0716-Feb19-09-04-49 2007-02-19 10:43:42.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 10 CORRECT 11 "d" Self-explanation Control S0716 S0716-Feb19-09-04-49 2007-02-19 10:43:50.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC6A Answer-1 1 CORRECT Answer-1 "1.02 m" Self-explanation Control 70 S0717 S0717-Feb19-13-09-44 2007-02-19 13:17:51.0 US/Eastern DELETION FOR* FOR4C Axes-1 Delete label=NIL Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 13:19:29.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 1 CORRECT Axes-2 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 15 S0717 S0717-Feb19-13-09-44 2007-02-19 13:20:03.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 1 CORRECT System-3 label="q";body=particle;time=NIL Self-explanation Control DRAW-BODY 25 S0717 S0717-Feb19-13-09-44 2007-02-19 13:21:31.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 INCORRECT Vector-4 label="E";type=E-field;body=region;agent=particle;time=NIL;dir=22;mag=97 Self-explanation Control DRAW-FIELD-GIVEN-DIR 23 S0717 S0717-Feb19-13-09-44 2007-02-19 13:23:00.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 INCORRECT 0 "E=14.3e+3N/C" The variable E is not used in any solution I know of. 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR 22 S0717 S0717-Feb19-13-09-44 2007-02-19 13:23:21.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 3 HINT Vector-4 label=E Is the particle the source of the electric field you are defining? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:23:44.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 4 CORRECT Vector-4 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=96 Self-explanation Control DRAW-FIELD-GIVEN-DIR 23 S0717 S0717-Feb19-13-09-44 2007-02-19 13:23:48.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 0 "E=14.3e+3N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 31 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:24:17.0 US/Eastern ATTEMPT Variable RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 INCORRECT Var-5 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="7.9e-6" Forgot to put units on a number. 1 Self-explanation Control DEFINE-CHARGE 30 (= Q_PARTICLE 7.900000000000001e-6) S0717 S0717-Feb19-13-09-44 2007-02-19 13:24:39.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 INCORRECT Var-5 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="7.9e-6C" Self-explanation Control DEFINE-CHARGE (= Q_PARTICLE (DNUM 7.900000000000001e-6 C)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:24:55.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 3 HINT Var-5 label=q 7.900000000000001e-6 C is not the correct value for q. Reread the problem statement carefully to find the given value for q, the charge on the particle. 1 Self-explanation Control DEFINE-CHARGE S0717 S0717-Feb19-13-09-44 2007-02-19 13:25:29.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 4 CORRECT Var-5 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6C" Self-explanation Control DEFINE-CHARGE 38 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0717 S0717-Feb19-13-09-44 2007-02-19 13:27:14.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 INCORRECT Vector-6 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=43;mag=91 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:27:17.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT Vector-6 label=F Do you really want the direction of that vector to be 43 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:27:38.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 INCORRECT Vector-6 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=91 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 37 S0717 S0717-Feb19-13-09-44 2007-02-19 13:27:43.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 1 HINT Vector-7 label=F Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0717 S0717-Feb19-13-09-44 2007-02-19 13:27:44.0 US/Eastern CANCEL FOR* FOR4C Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 13:27:45.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 4 HINT Vector-6 label=F Do you really want the direction of that vector to be 22 degrees? 1 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0717 S0717-Feb19-13-09-44 2007-02-19 13:28:03.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 2 HINT Vector-7 label=F Think about how the direction of the electric force on the particle due to an unspecified agent is related to the direction of the electric field vector. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:29:08.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 5 INCORRECT Vector-6 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=22;mag=91 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0717 S0717-Feb19-13-09-44 2007-02-19 13:29:18.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 6 INCORRECT Vector-6 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=91 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:29:42.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 7 HINT Vector-6 label=F Do you really want the direction of that vector to be 22 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:29:43.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 8 HINT Think about how the direction of the electric force on the particle due to an unspecified agent is related to the direction of the electric field vector. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:29:46.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 9 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:30:31.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 10 CORRECT Vector-6 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=116 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:30:44.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 INCORRECT 1 "F=E*q" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:31:08.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 2 CORRECT 1 "F=E*abs(q)" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 72 (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED (ABS Q_PARTICLE))) S0717 S0717-Feb19-13-09-44 2007-02-19 13:31:25.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 2 "F" Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 13:31:36.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 ".11297N" Self-explanation Control 97 S0717 S0717-Feb19-13-09-44 2007-02-19 13:41:35.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 S0717 S0717-Feb19-13-09-44 2007-02-19 13:41:35.0 US/Eastern DELETION ELEC* ELEC1C Axes-668 Delete label=NIL Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 13:42:18.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-669 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-COMPO-FORM-AXES 25 S0717 S0717-Feb19-13-09-44 2007-02-19 13:43:13.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 INCORRECT Vector-670 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=271;mag=93 Self-explanation Control DRAW-WEIGHT 23 S0717 S0717-Feb19-13-09-44 2007-02-19 13:43:16.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 2 HINT Vector-670 label=Fg Do you really want the direction of that vector to be 271 degrees? 1 Self-explanation Control DRAW-WEIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 13:43:24.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 3 HINT Notice that the electron is near the earth. 2 Self-explanation Control DRAW-WEIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 13:43:38.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 4 HINT When an object is near a planet, the planet exerts a weight force on the object. 3 Self-explanation Control DRAW-WEIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 13:43:51.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 5 HINT Vector-670 label=Fg Do you really want the direction of that vector to be 271 degrees? 1 Self-explanation Control DRAW-WEIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 13:44:01.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 6 INCORRECT Vector-670 label="Fg";type=Force;body=electron;agent=Unspecified;forcetype=grav;time=T0;dir=271;mag=93 Self-explanation Control DRAW-WEIGHT 22 S0717 S0717-Feb19-13-09-44 2007-02-19 13:44:26.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 7 CORRECT Vector-670 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=93 Self-explanation Control DRAW-WEIGHT 23 S0717 S0717-Feb19-13-09-44 2007-02-19 13:44:52.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 INCORRECT Vector-671 label="Fe";type=Force;body=electron;agent=earth;forcetype=Electric;time=T0;dir=90;mag=69 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 22 S0717 S0717-Feb19-13-09-44 2007-02-19 13:44:54.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 2 HINT Vector-671 label=Fe Is the force is due to the earth? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:44:56.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 3 HINT Forces are caused by interacting objects. The force can either be a field force, such as weight, in which case the objects do not have to touch. Or the force is a contact force, such as tension or friction, in which case the objects must touch. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:45:06.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 4 HINT Vector-671 label=Fe Is the force is due to the earth? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:45:17.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 5 CORRECT Vector-671 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=69 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 23 S0717 S0717-Feb19-13-09-44 2007-02-19 13:45:49.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT Var-672 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19" Forgot to put units on a number. 1 Self-explanation Control DEFINE-CHARGE 22 (= Q_ELECTRON (- 1.5999999999999998e-19)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:46:00.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-672 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19C" Self-explanation Control DEFINE-CHARGE 30 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0717 S0717-Feb19-13-09-44 2007-02-19 13:46:16.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-673 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31kg" Self-explanation Control DEFINE-MASS 38 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:46:56.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 CORRECT 0 "Fg=Fe" Self-explanation Control COMPO-ZERO-VECTOR (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) S0717 S0717-Feb19-13-09-44 2007-02-19 13:46:56.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 0 "Fg=Fe" Self-explanation Control COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) S0717 S0717-Feb19-13-09-44 2007-02-19 13:46:56.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 0 "Fg=Fe" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) S0717 S0717-Feb19-13-09-44 2007-02-19 13:46:56.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 0 "Fg=Fe" Self-explanation Control COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) S0717 S0717-Feb19-13-09-44 2007-02-19 13:47:28.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT 1 "m*g=E*q" Undefined variables: (m E q) 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:47:43.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 INCORRECT 1 "me*g=E*qe" Undefined variable: E 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:49:03.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 INCORRECT Vector-674 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=90;mag=71 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:49:07.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 HINT Vector-674 label=E Do you really want the direction of that vector to be 90 degrees? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:49:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 HINT You can determine the direction of the electric field at the region due to an unspecified agent from the problem statement 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 13:49:26.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 6 HINT Use the electric field drawing tool to draw the electric field at the region due to an unspecified agent in the given direction of 270 degrees. 3 3 Self-explanation Control DRAW-FIELD-GIVEN-DIR 32 S0717 S0717-Feb19-13-09-44 2007-02-19 13:49:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 7 CORRECT Vector-674 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=71 Self-explanation Control DRAW-FIELD-GIVEN-DIR 33 S0717 S0717-Feb19-13-09-44 2007-02-19 13:49:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 INCORRECT 1 "me*g=E*qe" Self-explanation Control WT-LAW 32 (= (* m_ELECTRON g_EARTH) (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:49:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 2 INCORRECT 1 "me*g=E*qe" Self-explanation Control COMPO-PARALLEL-AXIS 32 (= (* m_ELECTRON g_EARTH) (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:49:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 3 INCORRECT 1 "me*g=E*qe" Self-explanation Control WRITE-NFL-COMPO 32 (= (* m_ELECTRON g_EARTH) (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:49:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 4 INCORRECT 1 "me*g=E*qe" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO 32 (= (* m_ELECTRON g_EARTH) (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:49:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 5 INCORRECT 1 "me*g=E*qe" Self-explanation Control COMPO-PARALLEL-AXIS 32 (= (* m_ELECTRON g_EARTH) (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:49:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 6 INCORRECT 1 "me*g=E*qe" Self-explanation Control WT-LAW (= (* m_ELECTRON g_EARTH) (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:49:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 7 INCORRECT 1 "me*g=E*qe" Self-explanation Control COMPO-PARALLEL-AXIS (= (* m_ELECTRON g_EARTH) (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:49:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 8 INCORRECT 1 "me*g=E*qe" Self-explanation Control WRITE-NFL-COMPO (= (* m_ELECTRON g_EARTH) (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:49:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 9 INCORRECT 1 "me*g=E*qe" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO (= (* m_ELECTRON g_EARTH) (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:49:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 10 INCORRECT 1 "me*g=E*qe" Self-explanation Control COMPO-PARALLEL-AXIS (= (* m_ELECTRON g_EARTH) (* E_REGION_UNSPECIFIED Q_ELECTRON)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:50:02.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 11 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control WT-LAW S0717 S0717-Feb19-13-09-44 2007-02-19 13:50:03.0 US/Eastern CANCEL ELEC* ELEC1C Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 13:50:07.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 12 HINT 1 Think about the direction of the electric field at the region due to an unspecified agent. 1 Self-explanation Control WT-LAW S0717 S0717-Feb19-13-09-44 2007-02-19 13:50:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 13 INCORRECT 1 "me*g=abs(E)*qe" Self-explanation Control WT-LAW (= (* m_ELECTRON g_EARTH) (* (ABS E_REGION_UNSPECIFIED) Q_ELECTRON)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:50:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 14 INCORRECT 1 "me*g=abs(E)*qe" Self-explanation Control COMPO-PARALLEL-AXIS (= (* m_ELECTRON g_EARTH) (* (ABS E_REGION_UNSPECIFIED) Q_ELECTRON)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:50:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 15 INCORRECT 1 "me*g=abs(E)*qe" Self-explanation Control WRITE-NFL-COMPO (= (* m_ELECTRON g_EARTH) (* (ABS E_REGION_UNSPECIFIED) Q_ELECTRON)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:50:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 16 INCORRECT 1 "me*g=abs(E)*qe" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO (= (* m_ELECTRON g_EARTH) (* (ABS E_REGION_UNSPECIFIED) Q_ELECTRON)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:50:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 17 INCORRECT 1 "me*g=abs(E)*qe" Self-explanation Control COMPO-PARALLEL-AXIS (= (* m_ELECTRON g_EARTH) (* (ABS E_REGION_UNSPECIFIED) Q_ELECTRON)) S0717 S0717-Feb19-13-09-44 2007-02-19 13:50:24.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 18 HINT 1 Check your signs. 1 Self-explanation Control WT-LAW S0717 S0717-Feb19-13-09-44 2007-02-19 13:50:41.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 19 CORRECT 1 "me*g=abs(E)*abs(qe)" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control WT-LAW 52 (= (* m_ELECTRON g_EARTH) (* (ABS E_REGION_UNSPECIFIED) (ABS Q_ELECTRON))) S0717 S0717-Feb19-13-09-44 2007-02-19 13:50:41.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 2 CORRECT 1 "me*g=abs(E)*abs(qe)" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control COMPO-PARALLEL-AXIS 52 (= (* m_ELECTRON g_EARTH) (* (ABS E_REGION_UNSPECIFIED) (ABS Q_ELECTRON))) S0717 S0717-Feb19-13-09-44 2007-02-19 13:50:41.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 1 CORRECT 1 "me*g=abs(E)*abs(qe)" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control WRITE-NFL-COMPO 52 (= (* m_ELECTRON g_EARTH) (* (ABS E_REGION_UNSPECIFIED) (ABS Q_ELECTRON))) S0717 S0717-Feb19-13-09-44 2007-02-19 13:50:41.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 1 CORRECT 1 "me*g=abs(E)*abs(qe)" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO 52 (= (* m_ELECTRON g_EARTH) (* (ABS E_REGION_UNSPECIFIED) (ABS Q_ELECTRON))) S0717 S0717-Feb19-13-09-44 2007-02-19 13:50:41.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 1 CORRECT 1 "me*g=abs(E)*abs(qe)" Although equation 2 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control COMPO-PARALLEL-AXIS 52 (= (* m_ELECTRON g_EARTH) (* (ABS E_REGION_UNSPECIFIED) (ABS Q_ELECTRON))) S0717 S0717-Feb19-13-09-44 2007-02-19 13:50:55.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 20 HINT It is good practice to identify the fundamental principles you are using by writing them purely symbolically in standard form before combining them with other equations or given values. Select "Review Physics Equations" on the Help Menu to view a list of principles and their standard forms. 2 Self-explanation Control WT-LAW S0717 S0717-Feb19-13-09-44 2007-02-19 13:51:34.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 21 CORRECT 2 "abs(E)=(me*g)/abs(qe)" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control WT-LAW (= (ABS E_REGION_UNSPECIFIED) (/ (* m_ELECTRON g_EARTH) (ABS Q_ELECTRON))) S0717 S0717-Feb19-13-09-44 2007-02-19 13:51:34.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 3 CORRECT 2 "abs(E)=(me*g)/abs(qe)" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control COMPO-PARALLEL-AXIS (= (ABS E_REGION_UNSPECIFIED) (/ (* m_ELECTRON g_EARTH) (ABS Q_ELECTRON))) S0717 S0717-Feb19-13-09-44 2007-02-19 13:51:34.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 2 CORRECT 2 "abs(E)=(me*g)/abs(qe)" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control WRITE-NFL-COMPO (= (ABS E_REGION_UNSPECIFIED) (/ (* m_ELECTRON g_EARTH) (ABS Q_ELECTRON))) S0717 S0717-Feb19-13-09-44 2007-02-19 13:51:34.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 2 CORRECT 2 "abs(E)=(me*g)/abs(qe)" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO (= (ABS E_REGION_UNSPECIFIED) (/ (* m_ELECTRON g_EARTH) (ABS Q_ELECTRON))) S0717 S0717-Feb19-13-09-44 2007-02-19 13:51:34.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 2 CORRECT 2 "abs(E)=(me*g)/abs(qe)" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control COMPO-PARALLEL-AXIS (= (ABS E_REGION_UNSPECIFIED) (/ (* m_ELECTRON g_EARTH) (ABS Q_ELECTRON))) S0717 S0717-Feb19-13-09-44 2007-02-19 13:51:41.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C CALC_REQUEST 1 HINT It is good practice to identify the fundamental principles you are using by writing them purely symbolically in standard form before combining them with other equations or given values. Select "Review Physics Equations" on the Help Menu to view a list of principles and their standard forms. 2 Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 13:52:05.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 2 CORRECT 3 "E" Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 13:52:18.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 CORRECT Answer-1 "5.58e-11N/C" Self-explanation Control 77 S0717 S0717-Feb19-13-09-44 2007-02-19 14:04:39.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 CORRECT System-1 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 S0717 S0717-Feb19-13-09-44 2007-02-19 14:04:39.0 US/Eastern DELETION ELEC* ELEC3A Axes-2 Delete label=NIL Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:04:56.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 1 CORRECT Axes-3 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 25 S0717 S0717-Feb19-13-09-44 2007-02-19 14:05:30.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-4 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=66 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 14:05:45.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 2 CORRECT Vector-4 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=66 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 14:05:50.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 3 CORRECT Vector-4 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=66 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 14:07:07.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-5 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=72 Self-explanation Control DRAW-ACCEL-SPEED-UP S0717 S0717-Feb19-13-09-44 2007-02-19 14:07:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 INCORRECT Vector-6 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=89;mag=67 Self-explanation Control DRAW-VELOCITY-STRAIGHT 24 S0717 S0717-Feb19-13-09-44 2007-02-19 14:07:43.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 HINT Vector-6 label=v Do you really want the direction of that vector to be 89 degrees? 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 14:07:51.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 3 CORRECT Vector-6 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=67 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 14:08:09.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-7 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19C" Self-explanation Control DEFINE-CHARGE 28 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0717 S0717-Feb19-13-09-44 2007-02-19 14:08:22.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-8 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31kg" Self-explanation Control DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:09:36.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-9 label="Fe";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=67 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 14:10:36.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 INCORRECT 0 "Fe=E*q" Undefined variable: q 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0717 S0717-Feb19-13-09-44 2007-02-19 14:10:52.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 2 CORRECT 0 "Fe=E*abs(qe)" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 43 (= Fe_ELECTRON_PLATES_12 (* E_REGION_PLATES (ABS Q_ELECTRON))) S0717 S0717-Feb19-13-09-44 2007-02-19 14:11:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 1 CORRECT 1 "Fe=Fe_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Fe_ELECTRON_PLATES_12 Yc_Fe_ELECTRON_PLATES_12_0) S0717 S0717-Feb19-13-09-44 2007-02-19 14:11:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A CALC_REQUEST 1 INCORRECT 2 "Fe=Fe_total" Undefined variable: Fe_total 1 Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:11:35.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A CALC_REQUEST 2 HINT Var-4 label=se Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:11:55.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 3 INCORRECT 2 "Fe_y" Unable to solve for Fe_y. One thing you probably need is an equation specifying the given value of E. 1 1 Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:11:55.0 US/Eastern DELETION ELEC* ELEC3A 2 Delete Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:12:42.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 4 CORRECT Vector-4 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=66 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 14:13:32.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 2 "E=2.00e+4N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 47 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:13:44.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 4 CORRECT 3 "Fe_y" Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:14:05.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 4 "Fe=me*a" Self-explanation Control (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:14:55.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-10 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value=".015m" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 14:14:59.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A No Intepretation 2 HINT Var-10 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:14:59.0 US/Eastern DELETION ELEC* ELEC3A Var-10 Delete label=s Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:15:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 3 TRUE_BUT_IRRELEVANT 5 "a=Fe/me" Self-explanation Control (= a_ELECTRON_12 (/ Fe_ELECTRON_PLATES_12 m_ELECTRON)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:15:39.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 5 CORRECT 6 "a" Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:16:31.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 INCORRECT Var-11 label="v0";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T0;value="0" Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0717 S0717-Feb19-13-09-44 2007-02-19 14:16:34.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 2 HINT Var-11 label=v0 On this problem, you should use velocity instead of speed. 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0717 S0717-Feb19-13-09-44 2007-02-19 14:16:51.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 3 INCORRECT Var-11 label="v0";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T0;value="0" Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST 46 S0717 S0717-Feb19-13-09-44 2007-02-19 14:16:51.0 US/Eastern DELETION ELEC* ELEC3A Var-11 Delete label=v0 Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:17:11.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 1 INCORRECT 7 "v0=0" Undefined variable: v0 1 Self-explanation Control DEFINE-DURATION S0717 S0717-Feb19-13-09-44 2007-02-19 14:17:21.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 2 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DEFINE-DURATION S0717 S0717-Feb19-13-09-44 2007-02-19 14:17:41.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 3 CORRECT Var-12 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Self-explanation Control DEFINE-DURATION S0717 S0717-Feb19-13-09-44 2007-02-19 14:18:33.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Var-13 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value=".015m" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 14:18:37.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A No Intepretation 4 HINT Var-13 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:18:45.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A No Intepretation 5 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 2 Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:18:49.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A No Intepretation 6 HINT You should draw the displacement of the electron from T0 to T1. You can click on the light bulb button or 'explain further' for suggestions about how to solve the problem using it. 3 Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:19:04.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A No Intepretation 7 HINT You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:19:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 8 TRUE_BUT_IRRELEVANT 7 "a=v/t" Self-explanation Control (= a_ELECTRON_12 (/ v_ELECTRON_2 t_12)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:22:35.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Var-7 label=s Why don't you continue working on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 14:22:42.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Var-7 label=s You should be introducing a variable for the magnitude of the displacement of the electron from T0 to T1. 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 14:22:48.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT Var-7 label=s Notice that the electron is moving in a straight line from T0 to T1. 3 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 14:22:50.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT Var-7 label=s Whenever an object is moving in a straight line over a time interval, it has a displacement which is parallel to the direction of motion. 4 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 14:22:54.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 HINT Var-7 label=s Because the electron is moving in a straight line from T0 to T1, use the displacement tool to draw a displacement vector for it in direction 90 degrees 5 5 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 41 S0717 S0717-Feb19-13-09-44 2007-02-19 14:23:18.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 CORRECT Vector-14 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=67 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 14:23:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 8 "d=.015m" Self-explanation Control WRITE-KNOWN-VALUE-EQN 45 (= s_ELECTRON_12 (DNUM 0.015 m)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:23:27.0 US/Eastern DELETION ELEC* ELEC3A Var-13 Delete label=s Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:25:29.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 9 TRUE_BUT_IRRELEVANT 9 "v^2=2*a*d" Self-explanation Control (= (^ v_ELECTRON_2 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:25:43.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 6 CORRECT 10 "v" Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:25:53.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 INCORRECT Answer-1 "1.03m/s" Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:25:59.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A Answer-1 2 HINT Answer-1 label=1.03m/s 1.03 m/s is not the correct value for the magnitude of the velocity of the electron at T1. When you have entered enough equations, ask Andes to solve for v, then transfer the result to this answer box. 1 1 Self-explanation Control 40 S0717 S0717-Feb19-13-09-44 2007-02-19 14:26:30.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A Unknown 1 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:26:36.0 US/Eastern CANCEL ELEC* ELEC3A Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:26:55.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A Unknown 2 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:27:15.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC3A Unknown 3 HINT #.(wb-quant '(define-variable "v" |instantaneous| |velocity| |electron| |T1| |NIL| NIL "") 'yc) That quantity is not sought by the problem statement. 2 Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:27:21.0 US/Eastern CANCEL ELEC* ELEC3A Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:27:34.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 3 CORRECT Answer-1 "1.03e+7m/s" Self-explanation Control 63 S0717 S0717-Feb19-13-09-44 2007-02-19 14:40:09.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 S0717 S0717-Feb19-13-09-44 2007-02-19 14:40:20.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 25 S0717 S0717-Feb19-13-09-44 2007-02-19 14:40:38.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT Var-669 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19" Forgot to put units on a number. 1 Self-explanation Control DEFINE-CHARGE 23 (= Q_ELECTRON (- 1.5999999999999998e-19)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:40:46.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-669 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19C" Self-explanation Control DEFINE-CHARGE 28 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0717 S0717-Feb19-13-09-44 2007-02-19 14:40:57.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-670 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11E-31kg" Self-explanation Control DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:41:30.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=95 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 14:41:42.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 0 "E=4.00e-12N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 36 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:42:43.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-672 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=270;mag=95 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 35 S0717 S0717-Feb19-13-09-44 2007-02-19 14:42:48.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Vector-672 label=Fe Do you really want the direction of that vector to be 270 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 14:42:59.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Think about how the direction of the electric force on the electron due to an unspecified agent is related to the direction of the electric field vector. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 14:43:09.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 4 CORRECT Vector-672 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=95 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0717 S0717-Feb19-13-09-44 2007-02-19 14:43:48.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-673 label="Fw";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=108 Self-explanation Control DRAW-WEIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 14:44:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 1 INCORRECT 1 "Fw=Fw_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_12 Yc_Fw_ELECTRON_EARTH_12_0) S0717 S0717-Feb19-13-09-44 2007-02-19 14:44:07.0 US/Eastern DELETION ELEC* ELEC6A 1 Delete Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:44:38.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-674 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=102 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0717 S0717-Feb19-13-09-44 2007-02-19 14:45:24.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-675 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0717 S0717-Feb19-13-09-44 2007-02-19 14:45:50.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-676 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=53 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 14:46:01.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 1 "vi=4.30m/s" Self-explanation Control WRITE-KNOWN-VALUE-EQN 39 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:46:15.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 INCORRECT 2 "F=Fe+Fw" Undefined variable: F 1 Self-explanation Control DRAW-NET-FORCE-FROM-ACCEL S0717 S0717-Feb19-13-09-44 2007-02-19 14:46:26.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 HINT 5 Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DRAW-NET-FORCE-FROM-ACCEL S0717 S0717-Feb19-13-09-44 2007-02-19 14:46:50.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 3 CORRECT Vector-677 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=270;mag=88 Self-explanation Control DRAW-NET-FORCE-FROM-ACCEL S0717 S0717-Feb19-13-09-44 2007-02-19 14:46:52.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 INCORRECT 2 "F=Fe+Fw" Self-explanation Control COMPO-PARALLEL-AXIS 38 (= Fnet_ELECTRON_12 (+ Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:47:06.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 INCORRECT 2 "F=Fe-Fw" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:47:06.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 3 INCORRECT 2 "F=Fe-Fw" Self-explanation Control COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:47:06.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 4 INCORRECT 2 "F=Fe-Fw" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:47:38.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 5 INCORRECT 2 "Fe=E*abs(q)" Undefined variable: q 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0717 S0717-Feb19-13-09-44 2007-02-19 14:47:43.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 6 CORRECT 2 "Fe=E*abs(qe)" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 50 (= Fe_ELECTRON_UNSPECIFIED_12 (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON))) S0717 S0717-Feb19-13-09-44 2007-02-19 14:47:50.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 1 CORRECT 3 "Fe" Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:48:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 CORRECT 4 "Fw=me*g" Self-explanation Control WT-LAW (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:48:16.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 2 CORRECT 5 "Fw" Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:49:12.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 2 INCORRECT 6 "Fw=Fw_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_12 Yc_Fw_ELECTRON_EARTH_12_0) S0717 S0717-Feb19-13-09-44 2007-02-19 14:49:15.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 3 HINT 6 Think about the direction of the weight force on the electron from T0 to T1 due to the earth. 1 Self-explanation Control COMPO-PARALLEL-AXIS S0717 S0717-Feb19-13-09-44 2007-02-19 14:49:23.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 4 CORRECT 6 "Fw=-Fw_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_12 (- Yc_Fw_ELECTRON_EARTH_12_0)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:49:29.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 1 CORRECT 7 "Fe=Fe_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_12 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) S0717 S0717-Feb19-13-09-44 2007-02-19 14:49:43.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 2 INCORRECT 8 "F_y=Fw+Fe" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_Fnet_ELECTRON_12_0 (+ Fw_ELECTRON_EARTH_12 Fe_ELECTRON_UNSPECIFIED_12)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:49:43.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 3 INCORRECT 8 "F_y=Fw+Fe" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_Fnet_ELECTRON_12_0 (+ Fw_ELECTRON_EARTH_12 Fe_ELECTRON_UNSPECIFIED_12)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:49:43.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 4 INCORRECT 8 "F_y=Fw+Fe" Self-explanation Control WRITE-NET-FORCE-COMPO (= Yc_Fnet_ELECTRON_12_0 (+ Fw_ELECTRON_EARTH_12 Fe_ELECTRON_UNSPECIFIED_12)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:49:45.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 5 HINT 8 Think about the direction of the weight force on the electron from T0 to T1 due to the earth. 1 Self-explanation Control COMPO-PARALLEL-AXIS S0717 S0717-Feb19-13-09-44 2007-02-19 14:49:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 6 CORRECT 8 "F_y=-Fw+Fe" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_Fnet_ELECTRON_12_0 (+ (- Fw_ELECTRON_EARTH_12) Fe_ELECTRON_UNSPECIFIED_12)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:49:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 5 CORRECT 8 "F_y=-Fw+Fe" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_Fnet_ELECTRON_12_0 (+ (- Fw_ELECTRON_EARTH_12) Fe_ELECTRON_UNSPECIFIED_12)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:49:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 1 CORRECT 8 "F_y=-Fw+Fe" Self-explanation Control WRITE-NET-FORCE-COMPO (= Yc_Fnet_ELECTRON_12_0 (+ (- Fw_ELECTRON_EARTH_12) Fe_ELECTRON_UNSPECIFIED_12)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:50:04.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 3 CORRECT 9 "F_y" Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:50:35.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 1 TRUE_BUT_IRRELEVANT 10 "a=-a_y" Self-explanation Control (= a_ELECTRON_12 (- Yc_a_ELECTRON_12_0)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:50:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0))) 1 INCORRECT 11 "F_y=me*a" Self-explanation Control WRITE-NSL-NET-COMPO (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON a_ELECTRON_12)) S0717 S0717-Feb19-13-09-44 2007-02-19 14:51:01.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0))) 2 HINT 11 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Self-explanation Control WRITE-NSL-NET-COMPO S0717 S0717-Feb19-13-09-44 2007-02-19 14:51:10.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0))) 3 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Self-explanation Control WRITE-NSL-NET-COMPO 45 S0717 S0717-Feb19-13-09-44 2007-02-19 14:51:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0))) 4 INCORRECT 11 "F_y=me*-a_y" Self-explanation Control WRITE-NSL-NET-COMPO (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON (- Yc_a_ELECTRON_12_0))) S0717 S0717-Feb19-13-09-44 2007-02-19 14:51:28.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0))) 5 HINT 11 Think about the direction of the acceleration of the electron from T0 to T1. 1 Self-explanation Control WRITE-NSL-NET-COMPO S0717 S0717-Feb19-13-09-44 2007-02-19 14:51:40.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0))) 6 INCORRECT 11 "F_y=me*abs(a_y)" Self-explanation Control WRITE-NSL-NET-COMPO (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON (ABS Yc_a_ELECTRON_12_0))) S0717 S0717-Feb19-13-09-44 2007-02-19 14:51:43.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0))) 7 HINT 11 Think about the direction of the net force on the electron from T0 to T1. 1 Self-explanation Control WRITE-NSL-NET-COMPO S0717 S0717-Feb19-13-09-44 2007-02-19 14:51:44.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0))) 8 HINT Because the vector is parallel to the Y axis but in the negative direction, the projection equation is F_y = - F so F_y stands for a negative value. 2 Self-explanation Control WRITE-NSL-NET-COMPO S0717 S0717-Feb19-13-09-44 2007-02-19 14:51:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0))) 9 CORRECT 11 "-F_y=me*abs(a_y)" Self-explanation Control WRITE-NSL-NET-COMPO 56 (= (- Yc_Fnet_ELECTRON_12_0) (* m_ELECTRON (ABS Yc_a_ELECTRON_12_0))) S0717 S0717-Feb19-13-09-44 2007-02-19 14:52:14.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 4 CORRECT 12 "a_y" Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:53:08.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (DURATION (DURING 1 2))) 1 CORRECT Var-678 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Self-explanation Control DEFINE-DURATION S0717 S0717-Feb19-13-09-44 2007-02-19 14:53:19.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 1 INCORRECT 13 "v^2=vi^2+a_y*t" Units are inconsistent. 1 1 Self-explanation Control COMPO-ZERO-VECTOR (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* Yc_a_ELECTRON_12_0 t_12))) S0717 S0717-Feb19-13-09-44 2007-02-19 14:53:33.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 2 CORRECT 13 "v=vi+a_y*t" Although equation 14 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control COMPO-ZERO-VECTOR (= v_ELECTRON_2 (+ v_ELECTRON_1 (* Yc_a_ELECTRON_12_0 t_12))) S0717 S0717-Feb19-13-09-44 2007-02-19 14:53:33.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 1 CORRECT 13 "v=vi+a_y*t" Although equation 14 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control WRITE-LK-NO-S-COMPO (= v_ELECTRON_2 (+ v_ELECTRON_1 (* Yc_a_ELECTRON_12_0 t_12))) S0717 S0717-Feb19-13-09-44 2007-02-19 14:53:33.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 1 CORRECT 13 "v=vi+a_y*t" Although equation 14 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control WRITE-IMPLICIT-EQN (= v_ELECTRON_2 (+ v_ELECTRON_1 (* Yc_a_ELECTRON_12_0 t_12))) S0717 S0717-Feb19-13-09-44 2007-02-19 14:53:33.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 CORRECT 13 "v=vi+a_y*t" Although equation 14 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control COMPO-PARALLEL-AXIS (= v_ELECTRON_2 (+ v_ELECTRON_1 (* Yc_a_ELECTRON_12_0 t_12))) S0717 S0717-Feb19-13-09-44 2007-02-19 14:53:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 3 CORRECT 14 "v=v_y" Self-explanation Control COMPO-ZERO-VECTOR (= v_ELECTRON_2 Yc_v_ELECTRON_2_0) S0717 S0717-Feb19-13-09-44 2007-02-19 14:53:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 2 CORRECT 14 "v=v_y" Self-explanation Control WRITE-IMPLICIT-EQN (= v_ELECTRON_2 Yc_v_ELECTRON_2_0) S0717 S0717-Feb19-13-09-44 2007-02-19 14:53:57.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 5 CORRECT 15 "t" Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:54:05.0 US/Eastern ATTEMPT Answer RESULT Unsolicited ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Answer-1 ".473s" Units are inconsistent. 1 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 14:55:39.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-679 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=75 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0717 S0717-Feb19-13-09-44 2007-02-19 14:55:50.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 CORRECT 16 "d=d_y" Self-explanation Control COMPO-PARALLEL-AXIS 57 (= s_ELECTRON_12 Yc_s_ELECTRON_12_0) S0717 S0717-Feb19-13-09-44 2007-02-19 14:56:41.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 2 INCORRECT 17 "d_y=vI*t+.5*a_y*t^2" Undefined variable: vI 1 Self-explanation Control COMPO-PARALLEL-AXIS 56 S0717 S0717-Feb19-13-09-44 2007-02-19 14:56:49.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 3 CORRECT 17 "d_y=vi*t+.5*a_y*t^2" Although equation 18 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control COMPO-PARALLEL-AXIS 63 (= Yc_s_ELECTRON_12_0 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0717 S0717-Feb19-13-09-44 2007-02-19 14:56:49.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 CORRECT 17 "d_y=vi*t+.5*a_y*t^2" Although equation 18 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control WRITE-LK-NO-T-COMPO 63 (= Yc_s_ELECTRON_12_0 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0717 S0717-Feb19-13-09-44 2007-02-19 14:57:08.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 4 CORRECT 18 "vi=vi_y" Self-explanation Control COMPO-PARALLEL-AXIS (= v_ELECTRON_1 Yc_v_ELECTRON_1_0) S0717 S0717-Feb19-13-09-44 2007-02-19 14:57:20.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 6 CORRECT 19 "d_y" Self-explanation Control S0717 S0717-Feb19-13-09-44 2007-02-19 14:57:27.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC6A Answer-1 1 CORRECT Answer-1 "1.02m" Self-explanation Control 86 S0718 S0718-Feb21-15-02-01 2007-02-21 15:12:36.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 CORRECT Vector-1 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=102 Self-explanation Control DRAW-FIELD-GIVEN-DIR 5 S0718 S0718-Feb21-15-02-01 2007-02-21 15:13:36.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 1 CORRECT System-2 label="p";body=particle;time=NIL Self-explanation Control DRAW-BODY 15 S0718 S0718-Feb21-15-02-01 2007-02-21 15:14:34.0 US/Eastern ATTEMPT Variable RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 INCORRECT Var-3 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="14.3e+3 N/C" Units are inconsistent. 1 1 Self-explanation Control DEFINE-CHARGE 13 (= Q_PARTICLE (DNUM 14300.0 N/C)) S0718 S0718-Feb21-15-02-01 2007-02-21 15:17:01.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 INCORRECT 0 "E= (k*[q])/r^2" Undefined variables: (k r) 1 Self-explanation Control DEFINE-CHARGE 12 S0718 S0718-Feb21-15-02-01 2007-02-21 15:18:57.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 3 INCORRECT 0 "f=Qe" Undefined variables: (f Qe) 1 Self-explanation Control DEFINE-CHARGE S0718 S0718-Feb21-15-02-01 2007-02-21 15:19:03.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 4 INCORRECT 0 "f=qe" Undefined variables: (f qe) 1 Self-explanation Control DEFINE-CHARGE S0718 S0718-Feb21-15-02-01 2007-02-21 15:19:37.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 5 HINT Var-3 label=q Units are inconsistent. 1 1 Self-explanation Control DEFINE-CHARGE 7 S0718 S0718-Feb21-15-02-01 2007-02-21 15:20:24.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 6 CORRECT Var-3 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Self-explanation Control DEFINE-CHARGE 15 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0718 S0718-Feb21-15-02-01 2007-02-21 15:20:44.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 CORRECT Vector-1 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=102 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 15:21:13.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 1 "E=14.3e3 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 23 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0718 S0718-Feb21-15-02-01 2007-02-21 15:21:23.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 INCORRECT 0 "f=q*E" Undefined variable: f 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 22 S0718 S0718-Feb21-15-02-01 2007-02-21 15:23:00.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 INCORRECT Vector-4 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=292;mag=79 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 15:23:16.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 CORRECT Vector-4 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=78 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 15:23:31.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 INCORRECT 0 "F=q*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* Q_PARTICLE E_REGION_UNSPECIFIED)) S0718 S0718-Feb21-15-02-01 2007-02-21 15:23:34.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 2 HINT 0 Normally, this equation is written using an absolute value. 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0718 S0718-Feb21-15-02-01 2007-02-21 15:23:46.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 3 INCORRECT 0 "F=[q]*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* Q_PARTICLE E_REGION_UNSPECIFIED)) S0718 S0718-Feb21-15-02-01 2007-02-21 15:24:00.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 4 CORRECT 0 "F=abs(q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 57 (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED)) S0718 S0718-Feb21-15-02-01 2007-02-21 15:24:19.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 2 "F" Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 15:24:32.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 ".113 N" Self-explanation Control 82 S0718 S0718-Feb21-15-02-01 2007-02-21 15:37:29.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 S0718 S0718-Feb21-15-02-01 2007-02-21 15:38:18.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 CORRECT Vector-668 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=87 Self-explanation Control DRAW-WEIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 15:38:18.0 US/Eastern DELETION ELEC* ELEC1C Axes-669 Delete label=NIL Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 15:38:38.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-670 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-COMPO-FORM-AXES 25 S0718 S0718-Feb21-15-02-01 2007-02-21 15:39:13.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=90;mag=72 Self-explanation Control DRAW-FIELD-GIVEN-DIR 24 S0718 S0718-Feb21-15-02-01 2007-02-21 15:39:50.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 INCORRECT 0 "E=Fg" Units are inconsistent. 1 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR 23 (= E_REGION_UNSPECIFIED Fw_ELECTRON_EARTH_1) S0718 S0718-Feb21-15-02-01 2007-02-21 15:40:00.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 HINT Vector-671 label=E Do you really want the direction of that vector to be 90 degrees? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 15:40:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 HINT You can determine the direction of the electric field at the region due to an unspecified agent from the problem statement 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 15:40:31.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 HINT Use the electric field drawing tool to draw the electric field at the region due to an unspecified agent in the given direction of 270 degrees. 3 3 Self-explanation Control DRAW-FIELD-GIVEN-DIR 18 S0718 S0718-Feb21-15-02-01 2007-02-21 15:41:09.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 6 CORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=72 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 15:41:09.0 US/Eastern DELETION ELEC* ELEC1C 0 Delete Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 15:41:09.0 US/Eastern DELETION ELEC* ELEC1C Var-672 Delete label=NIL Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 15:42:19.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 INCORRECT Var-673 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31" Forgot to put units on a number. 1 Self-explanation Control DEFINE-MASS (= m_ELECTRON 9.11e-31) S0718 S0718-Feb21-15-02-01 2007-02-21 15:42:35.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 2 CORRECT Var-673 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31kg" Self-explanation Control DEFINE-MASS 25 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0718 S0718-Feb21-15-02-01 2007-02-21 15:44:00.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 INCORRECT 0 "F=abs(q)*E" Undefined variables: (F q) 1 Self-explanation Control WT-LAW S0718 S0718-Feb21-15-02-01 2007-02-21 15:44:00.0 US/Eastern DELETION ELEC* ELEC1C Var-674 Delete label=NIL Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 15:45:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 2 CORRECT 1 "Fg=m*g" Self-explanation Control WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0718 S0718-Feb21-15-02-01 2007-02-21 15:45:50.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= g_EARTH (DNUM 9.8 m/s^2))) 1 CORRECT 2 "g=9.8 m/s^2" Self-explanation Control WRITE-G-ON-EARTH (= g_EARTH (DNUM 9.8 m/s^2)) S0718 S0718-Feb21-15-02-01 2007-02-21 15:46:20.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT Var-675 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19" Forgot to put units on a number. 1 Self-explanation Control DEFINE-CHARGE (= Q_ELECTRON (- 1.5999999999999998e-19)) S0718 S0718-Feb21-15-02-01 2007-02-21 15:46:34.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-675 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Self-explanation Control DEFINE-CHARGE 33 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0718 S0718-Feb21-15-02-01 2007-02-21 15:47:02.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 INCORRECT 0 "Fe=abs(q)*E" Undefined variable: Fe 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 15:47:08.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 2 HINT 0 Undefined variable: Fe 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 15:49:09.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 3 CORRECT Vector-676 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=94 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 15:49:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 0 "F=abs(q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 68 (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0718 S0718-Feb21-15-02-01 2007-02-21 15:49:23.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 INCORRECT 3 "E" Unable to solve for E. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 15:50:01.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 CORRECT 3 "F=Fg" Self-explanation Control COMPO-ZERO-VECTOR (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0718 S0718-Feb21-15-02-01 2007-02-21 15:50:01.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 3 "F=Fg" Self-explanation Control COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0718 S0718-Feb21-15-02-01 2007-02-21 15:50:01.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 3 "F=Fg" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0718 S0718-Feb21-15-02-01 2007-02-21 15:50:01.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 3 "F=Fg" Self-explanation Control COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0718 S0718-Feb21-15-02-01 2007-02-21 15:50:10.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 2 CORRECT 4 "E" Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 15:50:23.0 US/Eastern ATTEMPT Answer RESULT Unsolicited ELEC* ELEC1C Answer-1 1 INCORRECT Answer-1 "5.58 N/" Syntax error in E=5.58 N/ 1 Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 15:50:29.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 2 INCORRECT Answer-1 "5.58 N/C" Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 15:51:05.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 3 CORRECT Answer-1 "5.58e-11 N/C" Self-explanation Control 90 S0718 S0718-Feb21-15-02-01 2007-02-21 16:04:23.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT Var-1 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="2.00e+4 N/C" Units are inconsistent. 1 1 Self-explanation Control DEFINE-CHARGE (= Q_ELECTRON (DNUM 20000.0 N/C)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:04:36.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 INCORRECT Var-1 label="q";quant=charge-on;subtype=NIL;body=plates;agent=NIL;time=NIL;value="2.00e+4 N/C" Self-explanation Control DEFINE-CHARGE S0718 S0718-Feb21-15-02-01 2007-02-21 16:04:42.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 3 HINT Var-1 label=q Are you sure you want to choose the plates? 1 Self-explanation Control DEFINE-CHARGE S0718 S0718-Feb21-15-02-01 2007-02-21 16:04:58.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 4 INCORRECT Var-1 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="2.00e+4 C" Self-explanation Control DEFINE-CHARGE (= Q_ELECTRON (DNUM 20000.0 C)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:05:07.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 5 HINT Var-1 label=q 20000.0 C is not the correct value for q. Reread the problem statement carefully to find the given value for q, the charge on the electron. 1 Self-explanation Control DEFINE-CHARGE S0718 S0718-Feb21-15-02-01 2007-02-21 16:05:40.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 6 INCORRECT Var-1 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="1.6e-19 C" Self-explanation Control DEFINE-CHARGE (= Q_ELECTRON (DNUM 1.5999999999999998e-19 C)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:05:43.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 HINT Var-1 label=q 1.5999999999999998e-19 C is not the correct value for q. Reread the problem statement carefully to find the given value for q, the charge on the electron. 1 Self-explanation Control DEFINE-MASS S0718 S0718-Feb21-15-02-01 2007-02-21 16:06:41.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 2 INCORRECT Var-2 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31" Forgot to put units on a number. 1 Self-explanation Control DEFINE-MASS (= m_ELECTRON 9.11e-31) S0718 S0718-Feb21-15-02-01 2007-02-21 16:06:59.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 3 CORRECT Var-2 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31kg" Self-explanation Control DEFINE-MASS 5 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:07:12.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 7 INCORRECT Var-1 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="1.6e-19 C" Self-explanation Control DEFINE-CHARGE 4 (= Q_ELECTRON (DNUM 1.5999999999999998e-19 C)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:07:18.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 HINT Var-1 label=qe 1.5999999999999998e-19 C is not the correct value for qe. Reread the problem statement carefully to find the given value for qe, the charge on the electron. 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 16:08:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 2 CORRECT Vector-3 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=60 Self-explanation Control DRAW-FIELD-GIVEN-DIR 5 S0718 S0718-Feb21-15-02-01 2007-02-21 16:08:20.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 INCORRECT 0 "E=2" Units are inconsistent. 1 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN (= E_REGION_PLATES 2) S0718 S0718-Feb21-15-02-01 2007-02-21 16:08:40.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 2 CORRECT 0 "E=2.00e4 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 9 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:08:40.0 US/Eastern DELETION ELEC* ELEC3A Var-1 Delete label=qe Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:09:33.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 8 INCORRECT Var-4 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="1.6e-19" Forgot to put units on a number. 1 Self-explanation Control DEFINE-CHARGE (= Q_ELECTRON 1.5999999999999998e-19) S0718 S0718-Feb21-15-02-01 2007-02-21 16:09:58.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 9 INCORRECT Var-4 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="1.6e-19 C" Self-explanation Control DEFINE-CHARGE (= Q_ELECTRON (DNUM 1.5999999999999998e-19 C)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:10:04.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 10 INCORRECT Var-4 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="1.6e-19 C" Self-explanation Control DEFINE-CHARGE (= Q_ELECTRON (DNUM 1.5999999999999998e-19 C)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:10:09.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Var-4 label=q 1.5999999999999998e-19 C is not the correct value for q. Reread the problem statement carefully to find the given value for q, the charge on the electron. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 16:13:17.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT 1 "V=kelec*q/r" Undefined variables: (V r) 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 16:14:14.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT Var-5 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.50 cm" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 16:14:18.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 HINT Var-5 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 16:14:18.0 US/Eastern DELETION ELEC* ELEC3A Var-6 Delete label=NIL Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:15:36.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 INCORRECT Var-7 label="r";quant=length;subtype=NIL;body=plates;agent=NIL;time=NIL;value="1.50 cm" Self-explanation Control DRAW-VELOCITY-STRAIGHT 8 S0718 S0718-Feb21-15-02-01 2007-02-21 16:15:40.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 3 HINT Var-7 label=r Although you can always define a length variable, none are needed for any solution I know of this problem. 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 16:15:40.0 US/Eastern DELETION ELEC* ELEC3A Var-5 Delete label=s Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:15:40.0 US/Eastern DELETION ELEC* ELEC3A Var-7 Delete label=r Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:16:40.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 4 INCORRECT Var-8 label="v";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T1;value="" Self-explanation Control DRAW-VELOCITY-STRAIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 16:16:40.0 US/Eastern DELETION ELEC* ELEC3A 1 Delete Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:18:33.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Self-explanation Control DRAW-BODY S0718 S0718-Feb21-15-02-01 2007-02-21 16:19:06.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 2 CORRECT System-9 label="p";body=electron;time=NIL Self-explanation Control DRAW-BODY 19 S0718 S0718-Feb21-15-02-01 2007-02-21 16:19:39.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-10 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=51 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 16:20:01.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 CORRECT 1 "F=abs(q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 31 (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:20:18.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 11 CORRECT Var-4 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.6e-19 C" Self-explanation Control DEFINE-CHARGE 35 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0718 S0718-Feb21-15-02-01 2007-02-21 16:21:10.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A CALC_REQUEST 1 INCORRECT 2 "F*D=W" Undefined variables: (D W) 1 Self-explanation Control 34 S0718 S0718-Feb21-15-02-01 2007-02-21 16:22:09.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 2 CORRECT 3 "F" Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:22:54.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-11 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=50 Self-explanation Control DRAW-ACCEL-SPEED-UP 35 S0718 S0718-Feb21-15-02-01 2007-02-21 16:23:01.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 3 INCORRECT 4 "a" Unable to solve for a. One thing you probably need is an equation specifying the given value of the magnitude of the displacement of the electron from T0 to T1. 1 1 Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:23:06.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 1 INCORRECT 2 "F=m*a" Undefined variable: m 1 Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:23:15.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 2 TRUE_BUT_IRRELEVANT 2 "F=me*a" Self-explanation Control (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:23:20.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 4 CORRECT 4 "a" Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:24:33.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 1 CORRECT Var-12 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Self-explanation Control DEFINE-DURATION S0718 S0718-Feb21-15-02-01 2007-02-21 16:24:38.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 INCORRECT 5 "x=.5*a*t^2" Undefined variable: x 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 16:24:57.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 INCORRECT 6 "x=1.5 cm" Undefined variable: x 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 16:25:20.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 INCORRECT Var-13 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T1;value="1.50 cm" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 16:25:25.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (DRAW-AXES 0) 1 HINT Var-13 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Self-explanation Control DRAW-UNROTATED-AXES S0718 S0718-Feb21-15-02-01 2007-02-21 16:26:33.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 2 CORRECT Axes-14 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 45 S0718 S0718-Feb21-15-02-01 2007-02-21 16:26:33.0 US/Eastern DELETION ELEC* ELEC3A Vector-15 Delete label=NIL Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:27:53.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 INCORRECT Vector-16 label="d";type=Displacement;body=electron;agent=NIL;time=T1;dir=90;mag=58 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 16:27:59.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 INCORRECT 6 "d=1.5 cm" The variable d is not used in any solution I know of. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 16:28:25.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 CORRECT Vector-16 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=58 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 16:28:34.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 3 TRUE_BUT_IRRELEVANT 5 "d=.5*a*t^2" Self-explanation Control (= s_ELECTRON_12 (* (* 0.5 a_ELECTRON_12) (^ t_12 2))) S0718 S0718-Feb21-15-02-01 2007-02-21 16:28:36.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 6 "d=1.5 cm" Self-explanation Control WRITE-KNOWN-VALUE-EQN 49 (= s_ELECTRON_12 (DNUM 1.5 cm)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:28:56.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 5 CORRECT 7 "t" Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:30:09.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 5 INCORRECT 8 "vf=2ad" Syntax error in vf=2ad 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT ? S0718 S0718-Feb21-15-02-01 2007-02-21 16:30:43.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 6 INCORRECT 8 "vf=2*a*d" Undefined variable: vf 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 16:31:11.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 7 CORRECT Vector-17 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=86 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 16:31:13.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 4 INCORRECT 8 "vf=2*a*d" Units are inconsistent. 1 1 Self-explanation Control (= v_ELECTRON_2 (* (* 2 a_ELECTRON_12) s_ELECTRON_12)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:31:35.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 5 TRUE_BUT_IRRELEVANT 8 "vf^2=2*a*d" Self-explanation Control (= (^ v_ELECTRON_2 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:31:42.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 6 CORRECT 9 "vf" Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:31:52.0 US/Eastern ATTEMPT Answer RESULT Unsolicited ELEC* ELEC3A Answer-1 1 INCORRECT Answer-1 "1.033*7" The units in this equation are not consistent. If this is a symbolic equation, there is probably an error: check all your terms. Another possibility is that a number has been used without correct associated units. 1 1 Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:32:00.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 2 INCORRECT Answer-1 "1.033*7 m/s" Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:32:04.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 3 INCORRECT Answer-1 "1.033*7 m/s" Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:32:12.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 4 INCORRECT Answer-1 "1.033*7 m/s" Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:32:54.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 5 CORRECT Answer-1 "1.03e+7 m/s" Self-explanation Control 70 S0718 S0718-Feb21-15-02-01 2007-02-21 16:48:54.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-667 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.6e-19 C" Self-explanation Control DEFINE-CHARGE 9 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0718 S0718-Feb21-15-02-01 2007-02-21 16:49:13.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 HINT Var-668 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e.31 kg" Internal error: could not process equation. 1 1 Self-explanation Control DEFINE-MASS 6 (= m_ELECTRON (DNUM 9.11E.31 kg)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:49:13.0 US/Eastern DELETION ELEC* ELEC6A Var-668 Delete label=m Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:49:55.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 2 INCORRECT Var-669 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-9.11e-31 kg" Self-explanation Control DEFINE-MASS 5 (= m_ELECTRON (- (DNUM 9.11e-31 kg))) S0718 S0718-Feb21-15-02-01 2007-02-21 16:50:03.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 3 CORRECT Var-669 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 10 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:50:33.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-670 label="p";body=electron;time=NIL Self-explanation Control DRAW-BODY 21 S0718 S0718-Feb21-15-02-01 2007-02-21 16:50:33.0 US/Eastern DELETION ELEC* ELEC6A Axes-671 Delete label=NIL Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:50:45.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-672 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 31 S0718 S0718-Feb21-15-02-01 2007-02-21 16:50:53.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 2 CORRECT Axes-672 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES S0718 S0718-Feb21-15-02-01 2007-02-21 16:50:53.0 US/Eastern DELETION ELEC* ELEC6A Axes-672 Delete label=NIL Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:50:53.0 US/Eastern DELETION ELEC* ELEC6A Axes-673 Delete label=NIL Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:51:10.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 3 CORRECT Axes-674 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 31 S0718 S0718-Feb21-15-02-01 2007-02-21 16:51:46.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-675 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=180;mag=111 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 16:52:04.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 INCORRECT Vector-675 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=0;mag=111 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 16:52:23.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 CORRECT Vector-675 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=111 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 16:52:58.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 INCORRECT Var-676 label="vo";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T0;value="" Self-explanation Control DRAW-VELOCITY-STRAIGHT 30 S0718 S0718-Feb21-15-02-01 2007-02-21 16:53:11.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 2 INCORRECT Var-676 label="vo";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T0;value="4.3 m/s" Self-explanation Control DRAW-VELOCITY-STRAIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 16:53:11.0 US/Eastern DELETION ELEC* ELEC6A Var-676 Delete label=vo Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:53:48.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 3 CORRECT Vector-677 label="vo";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=98 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0718 S0718-Feb21-15-02-01 2007-02-21 16:54:08.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 0 "vo=4.30 m/s" Self-explanation Control WRITE-KNOWN-VALUE-EQN 34 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:54:47.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-678 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0718 S0718-Feb21-15-02-01 2007-02-21 16:54:56.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 1 CORRECT 1 "vf=0 m/s" Self-explanation Control WRITE-IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:55:52.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-679 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=96 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 35 S0718 S0718-Feb21-15-02-01 2007-02-21 16:56:31.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT 3 "F= abs(q)*E" Undefined variable: F 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 34 S0718 S0718-Feb21-15-02-01 2007-02-21 16:57:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Vector-680 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=270;mag=103 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 16:57:11.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Vector-680 label=F Do you really want the direction of that vector to be 270 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 16:57:57.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 4 CORRECT Vector-680 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=103 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0718 S0718-Feb21-15-02-01 2007-02-21 16:58:08.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 3 "F= abs(q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 46 (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:58:22.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 INCORRECT 2 "vf^2= vo + 2*a*d" Undefined variable: a 1 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0718 S0718-Feb21-15-02-01 2007-02-21 16:58:43.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 CORRECT Vector-681 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=89 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0718 S0718-Feb21-15-02-01 2007-02-21 16:58:54.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 1 INCORRECT 4 "d" Unable to solve for d. One thing you probably need is an equation specifying the given value of E. 1 1 Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 16:59:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 INCORRECT 4 "E=4.00e12 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN (= E_REGION_UNSPECIFIED (DNUM 4.0e+12 N/C)) S0718 S0718-Feb21-15-02-01 2007-02-21 16:59:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 2 INCORRECT 4 "E=4.00e12 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN (= E_REGION_UNSPECIFIED (DNUM 4.0e+12 N/C)) S0718 S0718-Feb21-15-02-01 2007-02-21 17:00:03.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 3 CORRECT 4 "E=4.00e-12 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 50 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0718 S0718-Feb21-15-02-01 2007-02-21 17:00:08.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 INCORRECT 2 "vf^2= vo + 2*a*d" Units are inconsistent. 1 1 Self-explanation Control COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ v_ELECTRON_1 (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0718 S0718-Feb21-15-02-01 2007-02-21 17:00:18.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 2 INCORRECT 2 "vf^2= vo^2 + 2*a*d" Self-explanation Control COMPO-PARALLEL-AXIS 49 (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0718 S0718-Feb21-15-02-01 2007-02-21 17:00:18.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 INCORRECT 2 "vf^2= vo^2 + 2*a*d" Self-explanation Control WRITE-LK-NO-T-COMPO 49 (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0718 S0718-Feb21-15-02-01 2007-02-21 17:00:18.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 INCORRECT 2 "vf^2= vo^2 + 2*a*d" Self-explanation Control COMPO-PARALLEL-AXIS 49 (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0718 S0718-Feb21-15-02-01 2007-02-21 17:00:22.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A 2 1 HINT 2 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Self-explanation Control S0718 S0718-Feb21-15-02-01 2007-02-21 17:00:29.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A Unknown 1 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Self-explanation Control 44 S0719 S0719-Feb22-15-57-48 2007-02-22 16:06:26.0 US/Eastern DELETION FOR* FOR4C Axes-1 Delete label=NIL Joint Explanation Experimental S0719 S0719-Feb22-15-57-48 2007-02-22 16:08:07.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 1 CORRECT Axes-2 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 15 S0719 S0719-Feb22-15-57-48 2007-02-22 16:10:47.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 INCORRECT Vector-3 label="E";type=E-field;body=region;agent=particle;time=NIL;dir=22;mag=149 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 12 S0719 S0719-Feb22-15-57-48 2007-02-22 16:11:00.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 HINT Vector-3 label=E Is the particle the source of the electric field you are defining? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0719 S0719-Feb22-15-57-48 2007-02-22 16:11:17.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 3 HINT A better choice (but maybe not the only one) would be the field due to an unspecified agent, not the particle 2 2 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 8 S0719 S0719-Feb22-15-57-48 2007-02-22 16:11:37.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 4 CORRECT Vector-3 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=149 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0719 S0719-Feb22-15-57-48 2007-02-22 16:12:19.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 INCORRECT 0 "E=14.3e+3" Forgot to put units on a number. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= E_REGION_UNSPECIFIED 14300.0) S0719 S0719-Feb22-15-57-48 2007-02-22 16:12:34.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 2 CORRECT 0 "E=14.3e+3 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 16 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0719 S0719-Feb22-15-57-48 2007-02-22 16:13:39.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 CORRECT Var-4 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Joint Explanation Experimental DEFINE-CHARGE 23 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0719 S0719-Feb22-15-57-48 2007-02-22 16:14:57.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 CORRECT Vector-5 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=62 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 24 S0719 S0719-Feb22-15-57-48 2007-02-22 16:15:33.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 INCORRECT 1 "F=E*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 23 (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0719 S0719-Feb22-15-57-48 2007-02-22 16:16:23.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 2 INCORRECT 1 "F=E*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0719 S0719-Feb22-15-57-48 2007-02-22 16:16:25.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 3 HINT 1 Normally, this equation is written using an absolute value. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0719 S0719-Feb22-15-57-48 2007-02-22 16:16:50.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 4 HINT Writing the equation using an absolute value will lessen the chance that you make a sign error. 2 2 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 18 S0719 S0719-Feb22-15-57-48 2007-02-22 16:17:10.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 5 CORRECT 1 "F=E*abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 53 (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED (ABS Q_PARTICLE))) S0719 S0719-Feb22-15-57-48 2007-02-22 16:17:26.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 2 "F" Joint Explanation Experimental S0719 S0719-Feb22-15-57-48 2007-02-22 16:17:30.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Q_PARTICLE (DNUM -7.9 $mC))) 1 CORRECT 2 "F = 0.11297 N" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Fe_PARTICLE_UNSPECIFIED_1 (DNUM 0.11297 N)) S0719 S0719-Feb22-15-57-48 2007-02-22 16:17:30.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 3 CORRECT 2 "F = 0.11297 N" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Fe_PARTICLE_UNSPECIFIED_1 (DNUM 0.11297 N)) S0719 S0719-Feb22-15-57-48 2007-02-22 16:17:30.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 6 CORRECT 2 "F = 0.11297 N" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (DNUM 0.11297 N)) S0719 S0719-Feb22-15-57-48 2007-02-22 16:17:46.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 ".11297 N" Joint Explanation Experimental 78 S0719 S0719-Feb22-15-57-48 2007-02-22 16:30:53.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0719 S0719-Feb22-15-57-48 2007-02-22 16:31:39.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-668 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 22 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0719 S0719-Feb22-15-57-48 2007-02-22 16:32:06.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT Var-669 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19" Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE 21 (= Q_ELECTRON (- 1.5999999999999998e-19)) S0719 S0719-Feb22-15-57-48 2007-02-22 16:32:25.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-669 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 29 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0719 S0719-Feb22-15-57-48 2007-02-22 16:33:28.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 CORRECT Vector-670 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=144 Joint Explanation Experimental DRAW-WEIGHT S0719 S0719-Feb22-15-57-48 2007-02-22 16:33:40.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-671 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-COMPO-FORM-AXES 39 S0719 S0719-Feb22-15-57-48 2007-02-22 16:34:53.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-672 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=177 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0719 S0719-Feb22-15-57-48 2007-02-22 16:35:29.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-673 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=139 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0719 S0719-Feb22-15-57-48 2007-02-22 16:36:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 CORRECT 0 "Fg=g*me" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_1 (* g_EARTH m_ELECTRON)) S0719 S0719-Feb22-15-57-48 2007-02-22 16:37:10.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 INCORRECT 1 "Fe=abs(q)*E" Undefined variable: q 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0719 S0719-Feb22-15-57-48 2007-02-22 16:37:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 CORRECT 1 "Fe=abs(qe)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 74 (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0719 S0719-Feb22-15-57-48 2007-02-22 16:37:32.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 CORRECT 2 "Fe=Fg" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0719 S0719-Feb22-15-57-48 2007-02-22 16:37:32.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 2 "Fe=Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0719 S0719-Feb22-15-57-48 2007-02-22 16:37:32.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 2 "Fe=Fg" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0719 S0719-Feb22-15-57-48 2007-02-22 16:37:32.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 2 "Fe=Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0719 S0719-Feb22-15-57-48 2007-02-22 16:37:53.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 CORRECT 3 "E" Joint Explanation Experimental S0719 S0719-Feb22-15-57-48 2007-02-22 16:38:21.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 CORRECT Answer-1 "5.58e-11 N/C" Joint Explanation Experimental 99 S0719 S0719-Feb22-15-57-48 2007-02-22 16:57:00.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 CORRECT System-1 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0719 S0719-Feb22-15-57-48 2007-02-22 16:57:10.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 1 CORRECT Axes-2 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 25 S0719 S0719-Feb22-15-57-48 2007-02-22 16:57:46.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-3 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=121 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0719 S0719-Feb22-15-57-48 2007-02-22 16:58:03.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 INCORRECT 0 "E=2.00e+4 N/c" Undefined variable: c 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 24 S0719 S0719-Feb22-15-57-48 2007-02-22 16:58:10.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 2 CORRECT 0 "E=2.00e+4 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 28 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0719 S0719-Feb22-15-57-48 2007-02-22 16:59:05.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-4 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=130 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0719 S0719-Feb22-15-57-48 2007-02-22 16:59:33.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-5 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0719 S0719-Feb22-15-57-48 2007-02-22 16:59:52.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-6 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 36 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0719 S0719-Feb22-15-57-48 2007-02-22 17:01:43.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-7 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=65 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0719 S0719-Feb22-15-57-48 2007-02-22 17:02:42.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 CORRECT 1 "F=E*abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 47 (= Fe_ELECTRON_PLATES_12 (* E_REGION_PLATES (ABS Q_ELECTRON))) S0719 S0719-Feb22-15-57-48 2007-02-22 17:02:52.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 1 INCORRECT 2 "F=ma" Undefined variable: ma 1 Joint Explanation Experimental S0719 S0719-Feb22-15-57-48 2007-02-22 17:03:06.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 2 TRUE_BUT_IRRELEVANT 2 "F=m*a" Joint Explanation Experimental (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:03:37.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 CORRECT Vector-8 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=103 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0719 S0719-Feb22-15-57-48 2007-02-22 17:04:47.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 1 INCORRECT 3 "v=a*T1" Undefined variable: T1 1 Joint Explanation Experimental DEFINE-DURATION S0719 S0719-Feb22-15-57-48 2007-02-22 17:04:54.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 2 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Joint Explanation Experimental DEFINE-DURATION S0719 S0719-Feb22-15-57-48 2007-02-22 17:05:13.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 3 INCORRECT 3 "v=a*(T1-T0)" Undefined variables: (T1 T0) 1 Joint Explanation Experimental DEFINE-DURATION S0719 S0719-Feb22-15-57-48 2007-02-22 17:06:22.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 4 CORRECT Var-9 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Joint Explanation Experimental DEFINE-DURATION S0719 S0719-Feb22-15-57-48 2007-02-22 17:06:28.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 3 TRUE_BUT_IRRELEVANT 3 "v=a*t" Joint Explanation Experimental (= v_ELECTRON_2 (* a_ELECTRON_12 t_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:08:15.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 CORRECT 4 "a" Joint Explanation Experimental S0719 S0719-Feb22-15-57-48 2007-02-22 17:08:15.0 US/Eastern DELETION ELEC* ELEC3A Var-10 Delete label=NIL Joint Explanation Experimental S0719 S0719-Feb22-15-57-48 2007-02-22 17:14:57.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-11 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.50 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0719 S0719-Feb22-15-57-48 2007-02-22 17:15:02.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A CALC_REQUEST 2 INCORRECT 5 "v^2=2*a*s" The variable s is not used in any solution I know of. 1 Joint Explanation Experimental 46 S0719 S0719-Feb22-15-57-48 2007-02-22 17:15:30.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A CALC_REQUEST 3 HINT Var-11 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental S0719 S0719-Feb22-15-57-48 2007-02-22 17:16:10.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 4 INCORRECT 5 "v" Unable to solve for v. One thing you probably need is an equation specifying the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Joint Explanation Experimental S0719 S0719-Feb22-15-57-48 2007-02-22 17:16:10.0 US/Eastern DELETION ELEC* ELEC3A 5 Delete Joint Explanation Experimental S0719 S0719-Feb22-15-57-48 2007-02-22 17:17:04.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-12 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=69 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0719 S0719-Feb22-15-57-48 2007-02-22 17:17:15.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 CORRECT Vector-12 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=69 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0719 S0719-Feb22-15-57-48 2007-02-22 17:17:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 5 "d=1.50 cm" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 50 (= s_ELECTRON_12 (DNUM 1.5 cm)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:17:42.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 4 TRUE_BUT_IRRELEVANT 6 "v^2=2*a*d" Joint Explanation Experimental (= (^ v_ELECTRON_2 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:17:42.0 US/Eastern DELETION ELEC* ELEC3A Var-11 Delete label=s Joint Explanation Experimental S0719 S0719-Feb22-15-57-48 2007-02-22 17:17:59.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 5 CORRECT 7 "v" Joint Explanation Experimental S0719 S0719-Feb22-15-57-48 2007-02-22 17:18:21.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.027e+7 m/s" Joint Explanation Experimental 75 S0719 S0719-Feb22-15-57-48 2007-02-22 17:33:09.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0719 S0719-Feb22-15-57-48 2007-02-22 17:33:23.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 25 S0719 S0719-Feb22-15-57-48 2007-02-22 17:33:51.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 INCORRECT Vector-669 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=270;mag=126 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT 23 S0719 S0719-Feb22-15-57-48 2007-02-22 17:34:04.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 2 INCORRECT Vector-669 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=270;mag=126 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT 22 S0719 S0719-Feb22-15-57-48 2007-02-22 17:34:06.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 3 HINT Vector-669 label=vi Do you really want the direction of that vector to be 270 degrees? 1 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0719 S0719-Feb22-15-57-48 2007-02-22 17:34:32.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 4 CORRECT Vector-669 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=126 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT 23 S0719 S0719-Feb22-15-57-48 2007-02-22 17:35:23.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-670 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=133 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0719 S0719-Feb22-15-57-48 2007-02-22 17:35:39.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 5 CORRECT Vector-669 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=126 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT 24 S0719 S0719-Feb22-15-57-48 2007-02-22 17:35:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 0 "vi=4.30 m/s" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 28 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:36:25.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-671 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=171 Joint Explanation Experimental DRAW-WEIGHT S0719 S0719-Feb22-15-57-48 2007-02-22 17:37:10.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-672 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=133 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0719 S0719-Feb22-15-57-48 2007-02-22 17:37:10.0 US/Eastern DELETION ELEC* ELEC6A Vector-673 Delete label=NIL Joint Explanation Experimental S0719 S0719-Feb22-15-57-48 2007-02-22 17:39:22.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-674 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0719 S0719-Feb22-15-57-48 2007-02-22 17:39:29.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 1 CORRECT 1 "vf=0 m/s" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:40:06.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-675 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 32 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0719 S0719-Feb22-15-57-48 2007-02-22 17:40:28.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-676 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 36 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:41:05.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-677 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=233 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0719 S0719-Feb22-15-57-48 2007-02-22 17:41:20.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 INCORRECT 2 "Fe=abs(q)*e" Undefined variables: (q e) 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 35 S0719 S0719-Feb22-15-57-48 2007-02-22 17:41:26.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 INCORRECT 2 "Fe=abs(q)*E" Undefined variable: q 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0719 S0719-Feb22-15-57-48 2007-02-22 17:41:41.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 3 CORRECT 2 "Fe=abs(qe)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 47 (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:44:05.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-678 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=168 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN S0719 S0719-Feb22-15-57-48 2007-02-22 17:44:29.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 CORRECT 3 "Fg=me*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:45:03.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 1 INCORRECT 4 "Fe+Fg=me*a" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (+ Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON a_ELECTRON_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:45:24.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 2 HINT 4 What equation do you wish to write? 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0719 S0719-Feb22-15-57-48 2007-02-22 17:45:58.0 US/Eastern HINT_REQUEST Choose-Equation HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 3 HINT (nsl ((?axis . y))) Equations of that type appear within the problem solution. You should write the equation in the form F1_y + F2_y + ... = m*a_y using your own variables. If you do not want to write this equation and are not sure what to do, why don't you call Light-Bulb-Help. 2 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS 42 S0719 S0719-Feb22-15-57-48 2007-02-22 17:46:35.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 4 INCORRECT 4 "Fe-Fg=me*a" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON a_ELECTRON_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:46:35.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 1 INCORRECT 4 "Fe-Fg=me*a" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON a_ELECTRON_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:46:35.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 1 INCORRECT 4 "Fe-Fg=me*a" Joint Explanation Experimental WRITE-NSL-COMPO (= (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON a_ELECTRON_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:47:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 1 TRUE_BUT_IRRELEVANT 4 "Fg-Fe=me*a" Joint Explanation Experimental (= (- Fw_ELECTRON_EARTH_12 Fe_ELECTRON_UNSPECIFIED_12) (* m_ELECTRON a_ELECTRON_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:50:07.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (DURATION (DURING 1 2))) 1 CORRECT Var-679 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Joint Explanation Experimental DEFINE-DURATION S0719 S0719-Feb22-15-57-48 2007-02-22 17:50:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 1 INCORRECT 5 "t=(vf-vi)/a" Joint Explanation Experimental COMPO-ZERO-VECTOR (= t_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) a_ELECTRON_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:50:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 2 INCORRECT 5 "t=(vf-vi)/a" Joint Explanation Experimental WRITE-LK-NO-S-COMPO (= t_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) a_ELECTRON_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:50:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 3 INCORRECT 5 "t=(vf-vi)/a" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= t_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) a_ELECTRON_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:50:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 4 INCORRECT 5 "t=(vf-vi)/a" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= t_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) a_ELECTRON_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:50:36.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 5 INCORRECT 5 "t=(vf-vi)*a" Units are inconsistent. 1 1 Joint Explanation Experimental COMPO-ZERO-VECTOR 41 (= t_12 (* (- v_ELECTRON_2 v_ELECTRON_1) a_ELECTRON_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:50:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 6 INCORRECT 5 "a=(vf-vi)/t" Joint Explanation Experimental COMPO-ZERO-VECTOR (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:50:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 7 INCORRECT 5 "a=(vf-vi)/t" Joint Explanation Experimental WRITE-LK-NO-S-COMPO (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:50:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 8 INCORRECT 5 "a=(vf-vi)/t" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:50:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 9 INCORRECT 5 "a=(vf-vi)/t" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:51:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 10 INCORRECT 5 "(vf-vi)=a*t" Joint Explanation Experimental COMPO-ZERO-VECTOR (= (- v_ELECTRON_2 v_ELECTRON_1) (* a_ELECTRON_12 t_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:51:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 11 INCORRECT 5 "(vf-vi)=a*t" Joint Explanation Experimental WRITE-LK-NO-S-COMPO (= (- v_ELECTRON_2 v_ELECTRON_1) (* a_ELECTRON_12 t_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:51:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 12 INCORRECT 5 "(vf-vi)=a*t" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= (- v_ELECTRON_2 v_ELECTRON_1) (* a_ELECTRON_12 t_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:51:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 13 INCORRECT 5 "(vf-vi)=a*t" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (- v_ELECTRON_2 v_ELECTRON_1) (* a_ELECTRON_12 t_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:52:15.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 14 INCORRECT 5 "(vf-vi)/t=a" Joint Explanation Experimental COMPO-ZERO-VECTOR (= (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12) a_ELECTRON_12) S0719 S0719-Feb22-15-57-48 2007-02-22 17:52:15.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 15 INCORRECT 5 "(vf-vi)/t=a" Joint Explanation Experimental WRITE-LK-NO-S-COMPO (= (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12) a_ELECTRON_12) S0719 S0719-Feb22-15-57-48 2007-02-22 17:52:15.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 16 INCORRECT 5 "(vf-vi)/t=a" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12) a_ELECTRON_12) S0719 S0719-Feb22-15-57-48 2007-02-22 17:52:15.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 17 INCORRECT 5 "(vf-vi)/t=a" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12) a_ELECTRON_12) S0719 S0719-Feb22-15-57-48 2007-02-22 17:52:24.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 18 HINT 5 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental COMPO-ZERO-VECTOR S0719 S0719-Feb22-15-57-48 2007-02-22 17:53:11.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 19 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Joint Explanation Experimental COMPO-ZERO-VECTOR 36 S0719 S0719-Feb22-15-57-48 2007-02-22 17:53:26.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 20 CORRECT 5 "(vf-vi)/t=a_y" Although equation 6 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-ZERO-VECTOR 38 (= (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12) Yc_a_ELECTRON_12_0) S0719 S0719-Feb22-15-57-48 2007-02-22 17:53:26.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 1 CORRECT 5 "(vf-vi)/t=a_y" Although equation 6 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-S-COMPO 38 (= (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12) Yc_a_ELECTRON_12_0) S0719 S0719-Feb22-15-57-48 2007-02-22 17:53:26.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 2 CORRECT 5 "(vf-vi)/t=a_y" Although equation 6 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-IMPLICIT-EQN 38 (= (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12) Yc_a_ELECTRON_12_0) S0719 S0719-Feb22-15-57-48 2007-02-22 17:53:26.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 CORRECT 5 "(vf-vi)/t=a_y" Although equation 6 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 38 (= (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12) Yc_a_ELECTRON_12_0) S0719 S0719-Feb22-15-57-48 2007-02-22 17:54:10.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 2 TRUE_BUT_IRRELEVANT 6 "a_y=-a" Joint Explanation Experimental (= Yc_a_ELECTRON_12_0 (- a_ELECTRON_12)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:54:30.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 1 INCORRECT 7 "t" Unable to solve for t. One thing you probably need is an equation specifying the given value of E. 1 1 Joint Explanation Experimental S0719 S0719-Feb22-15-57-48 2007-02-22 17:56:14.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 2 CORRECT 7 "d=vi*t+0.5*a_y*t^2" Although equation 8 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 43 (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0719 S0719-Feb22-15-57-48 2007-02-22 17:56:14.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 CORRECT 7 "d=vi*t+0.5*a_y*t^2" Although equation 8 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO 43 (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0719 S0719-Feb22-15-57-48 2007-02-22 17:56:14.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 CORRECT 7 "d=vi*t+0.5*a_y*t^2" Although equation 8 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 43 (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0719 S0719-Feb22-15-57-48 2007-02-22 17:56:38.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 3 INCORRECT 8 "vi=-vi_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= v_ELECTRON_1 (- Yc_v_ELECTRON_1_0)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:56:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 4 CORRECT 8 "vi=vi_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= v_ELECTRON_1 Yc_v_ELECTRON_1_0) S0719 S0719-Feb22-15-57-48 2007-02-22 17:57:15.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 2 INCORRECT 9 "d" Unable to solve for d. One thing you probably need is an equation specifying the given value of E. 1 1 Joint Explanation Experimental S0719 S0719-Feb22-15-57-48 2007-02-22 17:58:04.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 INCORRECT 9 "E=4e-12 N/c" Undefined variable: c 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN S0719 S0719-Feb22-15-57-48 2007-02-22 17:58:09.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 2 CORRECT 9 "E=4e-12 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 47 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0719 S0719-Feb22-15-57-48 2007-02-22 17:58:17.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 3 INCORRECT 10 "Fg_x" Unable to solve for Fg_x. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0719 S0719-Feb22-15-57-48 2007-02-22 17:58:25.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 4 CORRECT 10 "d" Joint Explanation Experimental S0719 S0719-Feb22-15-57-48 2007-02-22 17:58:45.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC6A Answer-1 1 CORRECT Answer-1 "1.02 m" Joint Explanation Experimental 72 S0720 S0720-Feb23-13-04-16 2007-02-23 13:13:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 INCORRECT 0 "E=14.3e+3N/C" Undefined variable: E 1 Self-explanation Control DEFINE-CHARGE S0720 S0720-Feb23-13-04-16 2007-02-23 13:13:16.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 HINT Var-5 label=q Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DEFINE-CHARGE S0720 S0720-Feb23-13-04-16 2007-02-23 13:14:33.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 3 CORRECT Var-1 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Self-explanation Control DEFINE-CHARGE 10 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0720 S0720-Feb23-13-04-16 2007-02-23 13:14:33.0 US/Eastern DELETION FOR* FOR4C 0 Delete Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 13:14:33.0 US/Eastern DELETION FOR* FOR4C Axes-2 Delete label=NIL Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 13:16:18.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 1 CORRECT Axes-3 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 20 S0720 S0720-Feb23-13-04-16 2007-02-23 13:17:21.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 INCORRECT Vector-4 label="E";type=E-field;body=region;agent=particle;time=NIL;dir=22;mag=187 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:17:24.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 HINT Vector-4 label=E Is the particle the source of the electric field you are defining? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:17:24.0 US/Eastern DELETION FOR* FOR4C Vector-4 Delete label=E Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 13:18:18.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 3 CORRECT Vector-5 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=177 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:19:36.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 0 "E=14.3e+3 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 28 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0720 S0720-Feb23-13-04-16 2007-02-23 13:21:59.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 1 CORRECT System-6 label="p";body=particle;time=NIL Self-explanation Control DRAW-BODY 38 S0720 S0720-Feb23-13-04-16 2007-02-23 13:23:43.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 1 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=particle;forcetype=Electric;time=T0;dir=22;mag=79 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0720 S0720-Feb23-13-04-16 2007-02-23 13:23:48.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 2 HINT Vector-7 label=F A force arise from the interaction of two DIFFERENT objects, but you have used the particle for both. 1 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0720 S0720-Feb23-13-04-16 2007-02-23 13:24:00.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 3 HINT If you were trying to draw the net force on the particle, then double click on this force and look carefully at the dialog box. There is a button for defining the net force. 2 2 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES 33 S0720 S0720-Feb23-13-04-16 2007-02-23 13:24:54.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 4 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=22;mag=79 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES 32 S0720 S0720-Feb23-13-04-16 2007-02-23 13:25:02.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 5 HINT Vector-7 label=F Do you really want the direction of that vector to be 22 degrees? 1 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0720 S0720-Feb23-13-04-16 2007-02-23 13:25:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 6 HINT Since the forces acting on the particle at T0 are all pointing in the same direction, the direction of the total force is known. 2 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0720 S0720-Feb23-13-04-16 2007-02-23 13:25:29.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 7 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=NIL;mag=79 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0720 S0720-Feb23-13-04-16 2007-02-23 13:25:32.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 8 HINT Vector-7 label=F Do you really want the direction of that vector to be unknown? 1 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0720 S0720-Feb23-13-04-16 2007-02-23 13:25:35.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 9 HINT Since the forces acting on the particle at T0 are all pointing in the same direction, the direction of the total force is known. 2 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0720 S0720-Feb23-13-04-16 2007-02-23 13:25:57.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 10 HINT Draw a non-zero net force vector for the particle at T0 at 202 degrees. 3 3 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES 27 S0720 S0720-Feb23-13-04-16 2007-02-23 13:26:20.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 11 CORRECT Vector-7 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=202;mag=79 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES 28 S0720 S0720-Feb23-13-04-16 2007-02-23 13:27:31.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 HINT Vector-4 label=F Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:28:01.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT #.(wb-quant '(define-variable "F" |Net| |force| |particle| |T0| |NIL| NIL "") 'mag) That quantity is not sought by the problem statement. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:28:41.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 HINT #.(wb-quant '(define-variable "F" |Electric| |force| |particle| |T0| |Unspecified| NIL "") 'mag) Right. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:29:51.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 4 HINT (charge-force-efield ((?axis . x))) That principle is part of a valid solution to this problem but you cannot use it as the first principle. What is the first principle application that you wish to work on? You should look for a principle that contains the sought quantity itself. 4 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:30:06.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 5 HINT charge-force-efield-mag Good! You should be introducing a variable for the magnitude of the electric force on the particle at T0 due to an unspecified agent. 5 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:30:18.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 6 HINT Think about how the direction of the electric force on the particle due to an unspecified agent is related to the direction of the electric field vector. 6 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:32:00.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 7 HINT Why don't you continue with the solution by working on applying the definition of electric field magnitude at the particle at T0. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:32:16.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 8 HINT You should be introducing a variable for the magnitude of the electric force on the particle at T0 due to an unspecified agent. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:32:50.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 9 HINT Think about how the direction of the electric force on the particle due to an unspecified agent is related to the direction of the electric field vector. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:33:21.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 10 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 4 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:35:01.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 11 CORRECT Vector-8 label="EF";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=58 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:35:29.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 HINT 1 Why don't you continue working on applying the definition of electric field magnitude at the particle at T0. 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0720 S0720-Feb23-13-04-16 2007-02-23 13:36:49.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 2 CORRECT 1 "EF=abs(q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 63 (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED)) S0720 S0720-Feb23-13-04-16 2007-02-23 13:37:13.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 2 "EF" Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 13:37:21.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 "0.11297 N" Self-explanation Control 88 S0720 S0720-Feb23-13-04-16 2007-02-23 13:44:50.0 US/Eastern DELETION ELEC* ELEC1C Axes-667 Delete label=NIL Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 13:45:44.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-COMPO-FORM-AXES 15 S0720 S0720-Feb23-13-04-16 2007-02-23 13:46:15.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-669 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 25 S0720 S0720-Feb23-13-04-16 2007-02-23 13:47:09.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 2 CORRECT System-669 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY S0720 S0720-Feb23-13-04-16 2007-02-23 13:48:16.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (NET-FORCE ELECTRON TIME 1) ZERO) 1 INCORRECT Vector-670 label="Fy";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0;dir=270;mag=87 Self-explanation Control DRAW-NET-FORCE-ZERO 24 S0720 S0720-Feb23-13-04-16 2007-02-23 13:48:19.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 HINT Vector-670 label=Fy Are you sure that vector has a non-zero magnitude? 1 Self-explanation Control DEFINE-CHARGE S0720 S0720-Feb23-13-04-16 2007-02-23 13:48:19.0 US/Eastern DELETION ELEC* ELEC1C Vector-670 Delete label=Fy Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 13:49:02.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-671 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Self-explanation Control DEFINE-CHARGE 32 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0720 S0720-Feb23-13-04-16 2007-02-23 13:49:26.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-672 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31kg" Self-explanation Control DEFINE-MASS 39 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0720 S0720-Feb23-13-04-16 2007-02-23 13:49:48.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 3 INCORRECT System-673 label="earth";body=earth;time=NIL Self-explanation Control DRAW-BODY S0720 S0720-Feb23-13-04-16 2007-02-23 13:49:50.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 HINT System-673 label=earth The closest matching CORRECT entry seems to be done already, so you really don't need to generate it again. If you want to anyway, click on Explain more. 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:49:50.0 US/Eastern DELETION ELEC* ELEC1C System-673 Delete label=earth Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 13:50:24.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 INCORRECT Vector-674 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=NIL;mag=191 Self-explanation Control DRAW-FIELD-GIVEN-DIR 38 S0720 S0720-Feb23-13-04-16 2007-02-23 13:50:27.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 HINT Vector-674 label=E Do you really want the direction of that vector to be unknown? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:50:27.0 US/Eastern DELETION ELEC* ELEC1C Vector-674 Delete label=E Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 13:51:39.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 2 CORRECT Vector-675 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=108 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:52:01.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 CORRECT Vector-676 label="F";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=70 Self-explanation Control DRAW-WEIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 13:52:37.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 2 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-WEIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 13:52:40.0 US/Eastern CANCEL ELEC* ELEC1C Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 13:52:45.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 3 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-WEIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 13:53:40.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 4 HINT #.(wb-quant '(define-variable "E" |NIL| |E-field| |region| |NIL| |Unspecified| NIL "") 'mag) That's right. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Self-explanation Control DRAW-WEIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 13:54:04.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 5 HINT charge-force-efield-mag Right indeed. You should be introducing a variable for the magnitude of the electric field at the region due to an unspecified agent. 3 Self-explanation Control DRAW-WEIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 13:56:18.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 6 CORRECT Vector-676 label="Fm";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=70 Self-explanation Control DRAW-WEIGHT 39 S0720 S0720-Feb23-13-04-16 2007-02-23 13:56:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 CORRECT 0 "Fe=Fm" Self-explanation Control COMPO-ZERO-VECTOR (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0720 S0720-Feb23-13-04-16 2007-02-23 13:56:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 0 "Fe=Fm" Self-explanation Control COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0720 S0720-Feb23-13-04-16 2007-02-23 13:56:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 0 "Fe=Fm" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0720 S0720-Feb23-13-04-16 2007-02-23 13:56:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 0 "Fe=Fm" Self-explanation Control COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0720 S0720-Feb23-13-04-16 2007-02-23 13:57:22.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 INCORRECT 1 "F = abs(q)*E" Undefined variables: (F q E) 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR 38 S0720 S0720-Feb23-13-04-16 2007-02-23 13:57:59.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 INCORRECT 1 "F = abs(qe)*E" Undefined variables: (F E) 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:58:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:58:24.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 6 HINT Why don't you continue with the solution by working on applying the definition of electric field magnitude at the electron at T0. 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:58:38.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 7 HINT Try introducing a variable for the magnitude of the electric field at the region due to an unspecified agent. 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:58:44.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 8 HINT You can determine the direction of the electric field at the region due to an unspecified agent from the problem statement 3 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:59:25.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 9 INCORRECT Vector-677 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=0;mag=86 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:59:28.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 10 HINT Vector-677 label=E Do you really want the direction of that vector to be 0 degrees? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:59:31.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 11 HINT You can determine the direction of the electric field at the region due to an unspecified agent from the problem statement 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 13:59:34.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 12 HINT Use the electric field drawing tool to draw the electric field at the region due to an unspecified agent in the given direction of 270 degrees. 3 3 Self-explanation Control DRAW-FIELD-GIVEN-DIR 33 S0720 S0720-Feb23-13-04-16 2007-02-23 13:59:47.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 13 CORRECT Vector-677 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=86 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 14:00:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 1 "Fe = abs(qe)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 68 (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:00:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 CORRECT 2 "Fm=me*g" Self-explanation Control WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:01:04.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 CORRECT 3 "E" Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:01:16.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 CORRECT Answer-1 "5.58e-11 N/C" Self-explanation Control 93 S0720 S0720-Feb23-13-04-16 2007-02-23 14:11:43.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT Var-1 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19" Forgot to put units on a number. 1 Self-explanation Control DEFINE-CHARGE (= Q_ELECTRON (- 1.5999999999999998e-19)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:11:55.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-1 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Self-explanation Control DEFINE-CHARGE 6 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0720 S0720-Feb23-13-04-16 2007-02-23 14:12:20.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-2 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 11 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:12:48.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT 0 "E=2.00e+4 N/C" Undefined variable: E 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 10 S0720 S0720-Feb23-13-04-16 2007-02-23 14:12:53.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Var-7 label=s Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:12:53.0 US/Eastern DELETION ELEC* ELEC3A 0 Delete Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:14:18.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT Var-3 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.50 cm" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 9 S0720 S0720-Feb23-13-04-16 2007-02-23 14:14:22.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Var-3 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:14:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:14:55.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 INCORRECT Var-3 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.50 cm" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:15:21.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 HINT Var-3 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:15:23.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:15:23.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 HINT You should draw the displacement of the electron from T0 to T1. You can click on the light bulb button or 'explain further' for suggestions about how to solve the problem using it. 3 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:16:12.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 10 CORRECT Vector-4 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=86 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:16:12.0 US/Eastern DELETION ELEC* ELEC3A Var-3 Delete label=s Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:16:34.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 0 "d=1.50 cm" Self-explanation Control WRITE-KNOWN-VALUE-EQN 13 (= s_ELECTRON_12 (DNUM 1.5 cm)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:17:24.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-5 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=82 Self-explanation Control DRAW-FIELD-GIVEN-DIR 14 S0720 S0720-Feb23-13-04-16 2007-02-23 14:18:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-6 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=21 Self-explanation Control DRAW-ACCEL-SPEED-UP S0720 S0720-Feb23-13-04-16 2007-02-23 14:18:42.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 CORRECT Vector-7 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=18 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:19:15.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 1 INCORRECT 1 "at=v" Undefined variable: at 1 Self-explanation Control DEFINE-DURATION S0720 S0720-Feb23-13-04-16 2007-02-23 14:19:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 2 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DEFINE-DURATION S0720 S0720-Feb23-13-04-16 2007-02-23 14:19:19.0 US/Eastern DELETION ELEC* ELEC3A 1 Delete Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:20:04.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 3 CORRECT Var-8 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Self-explanation Control DEFINE-DURATION S0720 S0720-Feb23-13-04-16 2007-02-23 14:20:13.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 1 INCORRECT 1 "at=v" Undefined variable: at 1 Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:20:20.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 2 TRUE_BUT_IRRELEVANT 1 "a*t=v" Self-explanation Control (= (* a_ELECTRON_12 t_12) v_ELECTRON_2) S0720 S0720-Feb23-13-04-16 2007-02-23 14:20:59.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Self-explanation Control DRAW-BODY S0720 S0720-Feb23-13-04-16 2007-02-23 14:21:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (BODY ELECTRON TIME NIL) 2 HINT You should use the body tool to draw a body choosing the electron as the body. 2 2 Self-explanation Control DRAW-BODY 9 S0720 S0720-Feb23-13-04-16 2007-02-23 14:21:39.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 3 CORRECT System-9 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 19 S0720 S0720-Feb23-13-04-16 2007-02-23 14:21:53.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (DRAW-AXES 0) 1 HINT Vector-2 label=F It is now a good idea for you to draw an axis. This will help to ground your work and be useful later on in the process. 1 Self-explanation Control DRAW-UNROTATED-AXES S0720 S0720-Feb23-13-04-16 2007-02-23 14:21:53.0 US/Eastern DELETION ELEC* ELEC3A Axes-10 Delete label=NIL Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:22:07.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 2 CORRECT Axes-11 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 29 S0720 S0720-Feb23-13-04-16 2007-02-23 14:22:16.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 HINT You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the electric field at the region due to the plates. 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN S0720 S0720-Feb23-13-04-16 2007-02-23 14:22:41.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 2 CORRECT 2 "E=2.00e+4 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 33 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:23:02.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 14:23:22.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT #.(wb-quant '(define-variable "v" |instantaneous| |velocity| |electron| |T1| |NIL| NIL "") 'mag) Good! What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 14:24:48.0 US/Eastern CANCEL ELEC* ELEC3A Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:25:17.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT 3 "F= abs(q) * E" Undefined variables: (F q) 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 14:26:28.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 4 CORRECT Vector-12 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=32 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 14:26:53.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 5 INCORRECT Vector-13 label="Fw";type=Force;body=electron;agent=Unspecified;forcetype=grav;time=T0 to T1;dir=270;mag=40 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 14:26:59.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A No Intepretation 3 HINT Vector-13 label=Fw The closest matching CORRECT entry seems to be done already, so you really don't need to generate it again. If you want to anyway, click on Explain more. 1 Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:27:07.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A No Intepretation 4 HINT Andes' solution does not mention any forces on the electron due to an unspecified agent, nor any weight forces on the electron. Either this force does not exist or it is not needed for solving this problem. 2 Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:27:07.0 US/Eastern DELETION ELEC* ELEC3A Vector-13 Delete label=Fw Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:27:23.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 5 TRUE_BUT_IRRELEVANT 4 "F = me * a" Self-explanation Control (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:27:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 INCORRECT 3 "F= abs(q) * E" Undefined variable: q 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0720 S0720-Feb23-13-04-16 2007-02-23 14:27:40.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 2 CORRECT 3 "F= abs(qe) * E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 45 (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:27:54.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 CORRECT 5 "F" Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:28:05.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 2 CORRECT 6 "a" Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:28:14.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 3 INCORRECT 7 "v" Unable to solve for v. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:28:27.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 HINT Vector-10 label=v0 Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0720 S0720-Feb23-13-04-16 2007-02-23 14:28:32.0 US/Eastern CANCEL ELEC* ELEC3A Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:32:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 2 INCORRECT 7 "d = vo_y*t +.5*a_y*t^2" Undefined variable: vo_y 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST 44 S0720 S0720-Feb23-13-04-16 2007-02-23 14:32:56.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 3 INCORRECT 8 "vo_y=0" Undefined variable: vo_y 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0720 S0720-Feb23-13-04-16 2007-02-23 14:33:37.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 4 INCORRECT Vector-14 label="vo_y";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=27 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0720 S0720-Feb23-13-04-16 2007-02-23 14:33:41.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 5 HINT Vector-14 label=vo_y Are you sure the velocity of the electron is non-zero at T0? 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0720 S0720-Feb23-13-04-16 2007-02-23 14:33:47.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 6 HINT Because the electron is at rest at T0, its velocity at T0 is zero. 2 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0720 S0720-Feb23-13-04-16 2007-02-23 14:33:53.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 7 HINT Delete this vector and draw a zero-length velocity vector for the electron at T0 instead. To draw a zero-length vector, select the appropriate vector tool, then click and release immediately instead of dragging out an extended arrow. 3 3 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST 39 S0720 S0720-Feb23-13-04-16 2007-02-23 14:33:53.0 US/Eastern DELETION ELEC* ELEC3A Vector-14 Delete label=vo_y Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:34:35.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 8 CORRECT Vector-15 label="v0";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0720 S0720-Feb23-13-04-16 2007-02-23 14:34:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 1 INCORRECT 8 "vo=0" Undefined variable: vo 1 Self-explanation Control WRITE-IMPLICIT-EQN S0720 S0720-Feb23-13-04-16 2007-02-23 14:34:52.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 2 CORRECT 8 "v0=0" Self-explanation Control WRITE-IMPLICIT-EQN (= v_ELECTRON_1 0) S0720 S0720-Feb23-13-04-16 2007-02-23 14:35:04.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 6 TRUE_BUT_IRRELEVANT 7 "d = v0*t +.5*a*t^2" Self-explanation Control (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 a_ELECTRON_12) (^ t_12 2)))) S0720 S0720-Feb23-13-04-16 2007-02-23 14:35:10.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 4 CORRECT 9 "t" Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:35:15.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 5 CORRECT 10 "v" Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:35:29.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.03e+7m/s" Self-explanation Control 64 S0720 S0720-Feb23-13-04-16 2007-02-23 14:46:36.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-667 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 15 S0720 S0720-Feb23-13-04-16 2007-02-23 14:47:01.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-668 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 25 S0720 S0720-Feb23-13-04-16 2007-02-23 14:47:17.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-669 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Self-explanation Control DEFINE-CHARGE 29 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0720 S0720-Feb23-13-04-16 2007-02-23 14:47:35.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-670 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:47:35.0 US/Eastern DELETION ELEC* ELEC6A Axes-671 Delete label=NIL Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:48:32.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-672 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=65 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0720 S0720-Feb23-13-04-16 2007-02-23 14:49:02.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 INCORRECT Vector-673 label="vi";type=Velocity;body=electron;agent=average;time=T0 to T1;dir=90;mag=42 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:49:06.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 2 HINT Vector-673 label=vi You don't need to draw the velocity from T0 to T1. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:49:24.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 3 CORRECT Vector-673 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=42 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:49:48.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-674 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0720 S0720-Feb23-13-04-16 2007-02-23 14:50:04.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT 0 "vE=4.00e-12 N/C" Undefined variable: vE 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 31 S0720 S0720-Feb23-13-04-16 2007-02-23 14:51:12.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Var-675 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:51:16.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Var-675 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:51:16.0 US/Eastern DELETION ELEC* ELEC6A Var-675 Delete label=s Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:51:37.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 CORRECT Vector-676 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=146 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:52:20.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 0 "E=4.00e-12 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 35 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:52:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 1 "vi = 4.30 m/s" Self-explanation Control WRITE-KNOWN-VALUE-EQN 39 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:52:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 1 CORRECT 2 "vf = 0 m/s" Self-explanation Control WRITE-IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:52:37.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 INCORRECT Vector-677 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=67 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0720 S0720-Feb23-13-04-16 2007-02-23 14:52:39.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 HINT Vector-677 label=a Notice that the electron is slowing down. 1 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0720 S0720-Feb23-13-04-16 2007-02-23 14:52:44.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 3 HINT When an body is moving in a straight line and slowing down, its acceleration is in the opposite direction from its velocity. That is, it opposes the velocity, reducing it, and thus slowing the body down. 2 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0720 S0720-Feb23-13-04-16 2007-02-23 14:52:55.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 4 CORRECT Vector-677 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=67 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0720 S0720-Feb23-13-04-16 2007-02-23 14:53:18.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (DURATION (DURING 1 2))) 1 CORRECT Var-678 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Self-explanation Control DEFINE-DURATION S0720 S0720-Feb23-13-04-16 2007-02-23 14:53:19.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 1 INCORRECT 3 "d = vo*t + .5a*t^2" Syntax error in d = vo*t + .5a*t^2 1 Self-explanation Control COMPO-ZERO-VECTOR ? S0720 S0720-Feb23-13-04-16 2007-02-23 14:53:26.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 2 HINT The equation or the units in it are not in a recognizable form. 2 Self-explanation Control COMPO-ZERO-VECTOR S0720 S0720-Feb23-13-04-16 2007-02-23 14:53:35.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 3 INCORRECT 3 "d = v*t + .5a*t^2" Syntax error in d = v*t + .5a*t^2 1 Self-explanation Control COMPO-ZERO-VECTOR 38 ? S0720 S0720-Feb23-13-04-16 2007-02-23 14:53:51.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 4 INCORRECT 3 "d = vi*t + .5a*t^2" Syntax error in d = vi*t + .5a*t^2 1 Self-explanation Control COMPO-ZERO-VECTOR ? S0720 S0720-Feb23-13-04-16 2007-02-23 14:54:01.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 5 INCORRECT 4 "a = v/t" Undefined variable: v 1 Self-explanation Control COMPO-ZERO-VECTOR S0720 S0720-Feb23-13-04-16 2007-02-23 14:54:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 2 INCORRECT 4 "a = (vf-vi) /t" Self-explanation Control WRITE-IMPLICIT-EQN (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:54:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 INCORRECT 4 "a = (vf-vi) /t" Self-explanation Control COMPO-PARALLEL-AXIS (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:54:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 6 INCORRECT 4 "a = (vf-vi) /t" Self-explanation Control COMPO-ZERO-VECTOR (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:54:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 1 INCORRECT 4 "a = (vf-vi) /t" Self-explanation Control WRITE-LK-NO-S-COMPO (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:54:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 7 INCORRECT 4 "a = (vf-vi)/t" Self-explanation Control COMPO-ZERO-VECTOR (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:54:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 2 INCORRECT 4 "a = (vf-vi)/t" Self-explanation Control WRITE-LK-NO-S-COMPO (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:54:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 3 INCORRECT 4 "a = (vf-vi)/t" Self-explanation Control WRITE-IMPLICIT-EQN (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:54:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 2 INCORRECT 4 "a = (vf-vi)/t" Self-explanation Control COMPO-PARALLEL-AXIS (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:54:32.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 5 HINT 4 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0720 S0720-Feb23-13-04-16 2007-02-23 14:54:44.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 6 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Self-explanation Control DRAW-ACCEL-SLOW-DOWN 33 S0720 S0720-Feb23-13-04-16 2007-02-23 14:54:53.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 7 INCORRECT 4 "ay = (vf-vi)/t" Undefined variable: ay 1 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0720 S0720-Feb23-13-04-16 2007-02-23 14:55:05.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 8 CORRECT Vector-677 label="a_y";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=67 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0720 S0720-Feb23-13-04-16 2007-02-23 14:55:09.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 8 INCORRECT 4 "a_y = (vf-vi)/t" Self-explanation Control COMPO-ZERO-VECTOR (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:55:09.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 3 INCORRECT 4 "a_y = (vf-vi)/t" Self-explanation Control WRITE-LK-NO-S-COMPO (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:55:09.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 4 INCORRECT 4 "a_y = (vf-vi)/t" Self-explanation Control WRITE-IMPLICIT-EQN (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:55:09.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 3 INCORRECT 4 "a_y = (vf-vi)/t" Self-explanation Control COMPO-PARALLEL-AXIS (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0720 S0720-Feb23-13-04-16 2007-02-23 14:55:12.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 2 HINT 4 You used a_y, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0720 S0720-Feb23-13-04-16 2007-02-23 14:55:41.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 3 INCORRECT Var-679 label="v";quant=speed;subtype=average;body=electron;agent=NIL;time=T0 to T1;value="" Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0720 S0720-Feb23-13-04-16 2007-02-23 14:55:49.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 HINT Var-679 label=v The closest matching CORRECT entry seems to be done already, so you really don't need to generate it again. If you want to anyway, click on Explain more. 1 Self-explanation Control DRAW-WEIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:55:49.0 US/Eastern DELETION ELEC* ELEC6A Var-679 Delete label=v Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:55:49.0 US/Eastern DELETION ELEC* ELEC6A Var-680 Delete label=NIL Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:55:49.0 US/Eastern DELETION ELEC* ELEC6A 4 Delete Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:55:49.0 US/Eastern DELETION ELEC* ELEC6A 3 Delete Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:57:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 2 INCORRECT Vector-681 label="F";type=Force;body=electron;agent=Unspecified;forcetype=grav;time=T1;dir=270;mag=63 Self-explanation Control DRAW-WEIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:57:43.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 3 HINT Vector-681 label=F Is the force is due to an unspecified agent? 1 Self-explanation Control DRAW-WEIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:57:50.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 4 INCORRECT Vector-681 label="F";type=Force;body=electron;agent=earth;forcetype=grav;time=T1;dir=270;mag=63 Self-explanation Control DRAW-WEIGHT S0720 S0720-Feb23-13-04-16 2007-02-23 14:57:53.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 4 HINT Vector-681 label=F You don't need to draw the force at T1. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control COMPO-PARALLEL-AXIS S0720 S0720-Feb23-13-04-16 2007-02-23 14:58:00.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 5 HINT 3 If you click on 'explain more', I'll tell you a correct entry to make. However, you'd learn more if you figure it out yourself, perhaps with the aid of the light bulb button's hints. 2 Self-explanation Control COMPO-PARALLEL-AXIS S0720 S0720-Feb23-13-04-16 2007-02-23 14:58:08.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 6 HINT 3 Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control COMPO-PARALLEL-AXIS S0720 S0720-Feb23-13-04-16 2007-02-23 14:58:11.0 US/Eastern CANCEL ELEC* ELEC6A Self-explanation Control S0720 S0720-Feb23-13-04-16 2007-02-23 14:58:19.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 7 HINT 3 Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control COMPO-PARALLEL-AXIS S0720 S0720-Feb23-13-04-16 2007-02-23 14:58:30.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 8 HINT #.(wb-quant '(define-variable "d" |NIL| |displacement| |electron| |T1| |NIL| NIL "") 'mag) That quantity is not mentioned in the Andes solution. 2 Self-explanation Control COMPO-PARALLEL-AXIS S0720 S0720-Feb23-13-04-16 2007-02-23 14:58:42.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 9 HINT #.(wb-quant '(define-variable "d" |NIL| |displacement| |electron| |T0 to T1| |NIL| NIL "") 'mag) Right indeed. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 3 Self-explanation Control COMPO-PARALLEL-AXIS S0720 S0720-Feb23-13-04-16 2007-02-23 14:59:05.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 10 HINT (lk-no-vf ((?axis . y))) Yes. A good step would be writing a constant acceleration equation in terms of vector components along the Y axis. 4 Self-explanation Control COMPO-PARALLEL-AXIS S0720 S0720-Feb23-13-04-16 2007-02-23 15:00:11.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 11 INCORRECT 3 "d = vi*t + .5*a_y*t^2" Self-explanation Control COMPO-PARALLEL-AXIS (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 a_ELECTRON_12) (^ t_12 2)))) S0720 S0720-Feb23-13-04-16 2007-02-23 15:00:11.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 INCORRECT 3 "d = vi*t + .5*a_y*t^2" Self-explanation Control WRITE-LK-NO-T-COMPO (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 a_ELECTRON_12) (^ t_12 2)))) S0720 S0720-Feb23-13-04-16 2007-02-23 15:00:11.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 INCORRECT 3 "d = vi*t + .5*a_y*t^2" Self-explanation Control COMPO-PARALLEL-AXIS (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 a_ELECTRON_12) (^ t_12 2)))) S0721 S0721-Feb26-15-03-59 2007-02-26 15:13:30.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 1 CORRECT System-1 label="A";body=particle;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0721 S0721-Feb26-15-03-59 2007-02-26 15:13:30.0 US/Eastern DELETION FOR* FOR4C Axes-2 Delete label=NIL Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 15:13:30.0 US/Eastern DELETION FOR* FOR4C Axes-3 Delete label=NIL Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 15:13:30.0 US/Eastern DELETION FOR* FOR4C Axes-4 Delete label=NIL Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 15:13:30.0 US/Eastern DELETION FOR* FOR4C Axes-5 Delete label=NIL Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 15:14:08.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 22) 1 CORRECT Axes-6 body=NIL;dir=22;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-VECTOR-ALIGNED-AXES 25 S0721 S0721-Feb26-15-03-59 2007-02-26 15:14:08.0 US/Eastern DELETION FOR* FOR4C Axes-6 Delete label=NIL Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 15:14:41.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 1 CORRECT Axes-7 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 25 S0721 S0721-Feb26-15-03-59 2007-02-26 15:15:16.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 1 INCORRECT Vector-8 label="F";type=Force;body=particle;agent=particle;forcetype=Electric;time=T0;dir=22;mag=125 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES 24 S0721 S0721-Feb26-15-03-59 2007-02-26 15:17:28.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 2 INCORRECT Vector-8 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=22;mag=125 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES 23 S0721 S0721-Feb26-15-03-59 2007-02-26 15:17:53.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 INCORRECT Vector-8 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=125 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 22 S0721 S0721-Feb26-15-03-59 2007-02-26 15:17:59.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT Vector-8 label=F Do you really want the direction of that vector to be 22 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0721 S0721-Feb26-15-03-59 2007-02-26 15:18:15.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 HINT Think about how the direction of the electric force on the particle due to an unspecified agent is related to the direction of the electric field vector. 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0721 S0721-Feb26-15-03-59 2007-02-26 15:18:15.0 US/Eastern DELETION FOR* FOR4C Vector-8 Delete label=F Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 15:18:47.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 4 CORRECT Vector-9 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=110 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 23 S0721 S0721-Feb26-15-03-59 2007-02-26 15:20:10.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 INCORRECT 0 "F=cos$q(14.3e+3)-7.9e-6" Syntax error in F=cos$q(14.3e+3)-7.9e-6 1 Joint Explanation Experimental DEFINE-CHARGE 22 ? S0721 S0721-Feb26-15-03-59 2007-02-26 15:20:18.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 HINT Var-5 label=q The equation or the units in it are not in a recognizable form. 2 Joint Explanation Experimental DEFINE-CHARGE S0721 S0721-Feb26-15-03-59 2007-02-26 15:20:18.0 US/Eastern DELETION FOR* FOR4C Var-10 Delete label=NIL Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 15:22:24.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 3 CORRECT Var-11 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6C" Joint Explanation Experimental DEFINE-CHARGE 30 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0721 S0721-Feb26-15-03-59 2007-02-26 15:25:01.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 CORRECT Vector-12 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=106 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 31 S0721 S0721-Feb26-15-03-59 2007-02-26 15:25:17.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 1 INCORRECT 0 "F_x=cos$q(E)q" Syntax error in F_x=cos$q(E)q 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 30 ? S0721 S0721-Feb26-15-03-59 2007-02-26 15:25:23.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 2 HINT 0 The equation or the units in it are not in a recognizable form. 2 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO S0721 S0721-Feb26-15-03-59 2007-02-26 15:25:37.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 3 HINT 0 Though I can't tell exactly what the mistake is, a few common sources of errors are: (a) Unit symbols are case sensitive. (b) Multiplication always requires an explicit multiplication sign: W=m*g, NOT W=mg. (c) Units attach only to numbers, not to variables or expressions. 3 3 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO S0721 S0721-Feb26-15-03-59 2007-02-26 15:25:59.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 4 INCORRECT 0 "F_x=cos$q*(E)*q" Undefined variable: cos$q 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO S0721 S0721-Feb26-15-03-59 2007-02-26 15:26:07.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 5 HINT 0 Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO S0721 S0721-Feb26-15-03-59 2007-02-26 15:27:07.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 6 INCORRECT 0 "F_x=cos$q*(E)*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* (* (COS (DNUM 90 deg)) E_REGION_UNSPECIFIED) Q_PARTICLE)) S0721 S0721-Feb26-15-03-59 2007-02-26 15:27:31.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 7 INCORRECT 0 "F_x=cos$q*(E)*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* (* (COS (DNUM 90 deg)) E_REGION_UNSPECIFIED) Q_PARTICLE)) S0721 S0721-Feb26-15-03-59 2007-02-26 15:28:44.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 8 INCORRECT 0 "F_x=cos$q*(E)*abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* (* (COS (DNUM 90 deg)) E_REGION_UNSPECIFIED) (ABS Q_PARTICLE))) S0721 S0721-Feb26-15-03-59 2007-02-26 15:29:29.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 9 CORRECT 0 "F_x=E_x*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 65 (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Xc_E_REGION_UNSPECIFIED_0 Q_PARTICLE)) S0721 S0721-Feb26-15-03-59 2007-02-26 15:29:51.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 1 CORRECT 1 "F_y=E_y*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Yc_E_REGION_UNSPECIFIED_0 Q_PARTICLE)) S0721 S0721-Feb26-15-03-59 2007-02-26 15:32:31.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (SQRT (+ (^ Yc_Fe_PARTICLE_UNSPECIFIED_1_0 2) (^ Xc_Fe_PARTICLE_UNSPECIFIED_1_0 2))))) 1 CORRECT 2 "F=sqrt(F_x^2+F_y^2)" Joint Explanation Experimental WRITE-VECTOR-MAGNITUDE (= Fe_PARTICLE_UNSPECIFIED_1 (SQRT (+ (^ Xc_Fe_PARTICLE_UNSPECIFIED_1_0 2) (^ Yc_Fe_PARTICLE_UNSPECIFIED_1_0 2)))) S0721 S0721-Feb26-15-03-59 2007-02-26 15:32:46.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 INCORRECT 3 "F" Unable to solve for F. One thing you probably need is an equation specifying the given value of E. 1 1 Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 15:33:23.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 3 "E=14.3e+3N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 73 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0721 S0721-Feb26-15-03-59 2007-02-26 15:33:27.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 2 INCORRECT 4 "F" Unable to solve for F. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 15:34:27.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 1 INCORRECT 4 "E_x=cos*($qE)" Undefined variable: cos 1 Joint Explanation Experimental COMPO-GENERAL-CASE S0721 S0721-Feb26-15-03-59 2007-02-26 15:34:47.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 2 INCORRECT 4 "E_x=cos$q*E" Joint Explanation Experimental COMPO-GENERAL-CASE (= Xc_E_REGION_UNSPECIFIED_0 (* (COS (DNUM 90 deg)) E_REGION_UNSPECIFIED)) S0721 S0721-Feb26-15-03-59 2007-02-26 15:35:18.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 3 CORRECT 4 "E_x=E*cos($qE)" Joint Explanation Experimental COMPO-GENERAL-CASE (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS OE_REGION_UNSPECIFIED))) S0721 S0721-Feb26-15-03-59 2007-02-26 15:35:18.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (IMPLICIT-EQN (= OE_REGION_UNSPECIFIED (DNUM 22 deg))) 1 CORRECT 4 "E_x=E*cos($qE)" Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS OE_REGION_UNSPECIFIED))) S0721 S0721-Feb26-15-03-59 2007-02-26 15:35:31.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 1 INCORRECT 5 "E_y=E*cos($qE)" Joint Explanation Experimental COMPO-GENERAL-CASE (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS OE_REGION_UNSPECIFIED))) S0721 S0721-Feb26-15-03-59 2007-02-26 15:35:31.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 2 INCORRECT 5 "E_y=E*cos($qE)" Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS OE_REGION_UNSPECIFIED))) S0721 S0721-Feb26-15-03-59 2007-02-26 15:35:36.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 3 INCORRECT 5 "E_y=E*sin)" Syntax error in E_y=E*sin) 1 Joint Explanation Experimental COMPO-GENERAL-CASE 72 ? S0721 S0721-Feb26-15-03-59 2007-02-26 15:35:48.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 4 CORRECT 5 "E_y=E*sin($qE)" Joint Explanation Experimental COMPO-GENERAL-CASE 73 (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN OE_REGION_UNSPECIFIED))) S0721 S0721-Feb26-15-03-59 2007-02-26 15:35:48.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (IMPLICIT-EQN (= OE_REGION_UNSPECIFIED (DNUM 22 deg))) 2 CORRECT 5 "E_y=E*sin($qE)" Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 73 (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN OE_REGION_UNSPECIFIED))) S0721 S0721-Feb26-15-03-59 2007-02-26 15:35:52.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 3 CORRECT 6 "F" Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 15:36:07.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 "0.113N" Joint Explanation Experimental 98 S0721 S0721-Feb26-15-03-59 2007-02-26 15:46:18.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0721 S0721-Feb26-15-03-59 2007-02-26 15:46:26.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-COMPO-FORM-AXES 25 S0721 S0721-Feb26-15-03-59 2007-02-26 15:46:59.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 CORRECT Vector-669 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=112 Joint Explanation Experimental DRAW-WEIGHT S0721 S0721-Feb26-15-03-59 2007-02-26 15:47:22.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-670 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=109 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0721 S0721-Feb26-15-03-59 2007-02-26 15:47:39.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-671 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=123 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0721 S0721-Feb26-15-03-59 2007-02-26 15:48:10.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 INCORRECT Var-672 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-3kg" Joint Explanation Experimental DEFINE-MASS 24 (= m_ELECTRON (DNUM 0.00911 kg)) S0721 S0721-Feb26-15-03-59 2007-02-26 15:48:21.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 2 CORRECT Var-672 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31kg" Joint Explanation Experimental DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0721 S0721-Feb26-15-03-59 2007-02-26 15:49:17.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 INCORRECT 0 "Fg=mg" Undefined variable: mg 1 Joint Explanation Experimental WT-LAW 31 S0721 S0721-Feb26-15-03-59 2007-02-26 15:49:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 2 CORRECT 0 "Fg=m*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0721 S0721-Feb26-15-03-59 2007-02-26 15:49:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 CORRECT 1 "Fe=Fg" Joint Explanation Experimental COMPO-ZERO-VECTOR 32 (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0721 S0721-Feb26-15-03-59 2007-02-26 15:49:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 1 "Fe=Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS 32 (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0721 S0721-Feb26-15-03-59 2007-02-26 15:49:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 1 "Fe=Fg" Joint Explanation Experimental WRITE-NET-FORCE-COMPO 32 (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0721 S0721-Feb26-15-03-59 2007-02-26 15:49:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 1 "Fe=Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS 32 (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0721 S0721-Feb26-15-03-59 2007-02-26 15:49:55.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 CORRECT 2 "Fe" Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 15:50:07.0 US/Eastern ATTEMPT Answer RESULT Unsolicited ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT Answer-1 "8.93e-30N" Units are inconsistent. 1 1 Joint Explanation Experimental DEFINE-CHARGE S0721 S0721-Feb26-15-03-59 2007-02-26 15:50:47.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-673 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19C" Joint Explanation Experimental DEFINE-CHARGE 39 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0721 S0721-Feb26-15-03-59 2007-02-26 15:51:27.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 INCORRECT 3 "E=abs(q)/Fe" Units are inconsistent. 1 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= E_REGION_UNSPECIFIED (/ (ABS Q_ELECTRON) Fe_ELECTRON_UNSPECIFIED_1)) S0721 S0721-Feb26-15-03-59 2007-02-26 15:51:48.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 CORRECT 3 "Fe=E*abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 74 (= Fe_ELECTRON_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON))) S0721 S0721-Feb26-15-03-59 2007-02-26 15:51:53.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 2 CORRECT 4 "E" Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 15:52:06.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 CORRECT Answer-1 "5.58e-11N/C" Joint Explanation Experimental 96 S0721 S0721-Feb26-15-03-59 2007-02-26 16:03:17.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 CORRECT System-1 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0721 S0721-Feb26-15-03-59 2007-02-26 16:03:39.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-2 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=91 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0721 S0721-Feb26-15-03-59 2007-02-26 16:03:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 0 "E=2.00e+4N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 19 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0721 S0721-Feb26-15-03-59 2007-02-26 16:04:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-3 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=107 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 18 S0721 S0721-Feb26-15-03-59 2007-02-26 16:04:58.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Vector-3 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=107 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 17 S0721 S0721-Feb26-15-03-59 2007-02-26 16:04:58.0 US/Eastern DELETION ELEC* ELEC3A Vector-3 Delete label=F Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:06:22.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-4 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T0;dir=90;mag=88 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP 16 S0721 S0721-Feb26-15-03-59 2007-02-26 16:06:22.0 US/Eastern DELETION ELEC* ELEC3A Vector-4 Delete label=a Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:06:52.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-5 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=103 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP 17 S0721 S0721-Feb26-15-03-59 2007-02-26 16:06:52.0 US/Eastern DELETION ELEC* ELEC3A Vector-6 Delete label=NIL Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:09:49.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 CORRECT Vector-7 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=107 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0721 S0721-Feb26-15-03-59 2007-02-26 16:10:33.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-8 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19C" Joint Explanation Experimental DEFINE-CHARGE 21 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0721 S0721-Feb26-15-03-59 2007-02-26 16:10:58.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-9 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31kg" Joint Explanation Experimental DEFINE-MASS 25 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0721 S0721-Feb26-15-03-59 2007-02-26 16:11:05.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 CORRECT 1 "F=E*abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 37 (= Fe_ELECTRON_PLATES_12 (* E_REGION_PLATES (ABS Q_ELECTRON))) S0721 S0721-Feb26-15-03-59 2007-02-26 16:11:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 2 "F=m*a" Joint Explanation Experimental (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) S0721 S0721-Feb26-15-03-59 2007-02-26 16:11:38.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 CORRECT 3 "F" Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:12:25.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 2 CORRECT 4 "a" Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:13:33.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 INCORRECT Var-10 label="v";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T1;value="" Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT 36 S0721 S0721-Feb26-15-03-59 2007-02-26 16:13:55.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 INCORRECT Var-10 label="v";quant=speed;subtype=average;body=electron;agent=NIL;time=T0 to T1;value="" Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0721 S0721-Feb26-15-03-59 2007-02-26 16:13:58.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 2 HINT Var-10 label=v On this problem, you should use velocity instead of speed. 1 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0721 S0721-Feb26-15-03-59 2007-02-26 16:14:12.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 3 INCORRECT Var-10 label="v";quant=speed;subtype=average;body=electron;agent=NIL;time=T0 to T1;value="" Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0721 S0721-Feb26-15-03-59 2007-02-26 16:14:12.0 US/Eastern DELETION ELEC* ELEC3A Var-10 Delete label=v Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:15:07.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 INCORRECT Var-11 label="v";quant=speed;subtype=instantaneous;body=electron;agent=NIL;time=T1;value="" Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0721 S0721-Feb26-15-03-59 2007-02-26 16:15:13.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 3 HINT Var-11 label=v On this problem, you should use velocity instead of speed. 1 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0721 S0721-Feb26-15-03-59 2007-02-26 16:15:14.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 4 HINT Delete the speed variable and draw a velocity vector for the electron at T1. 2 2 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT 31 S0721 S0721-Feb26-15-03-59 2007-02-26 16:15:14.0 US/Eastern DELETION ELEC* ELEC3A Var-11 Delete label=v Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:15:34.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 5 CORRECT Vector-12 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=95 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0721 S0721-Feb26-15-03-59 2007-02-26 16:16:14.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-13 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T1;value=".015m" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0721 S0721-Feb26-15-03-59 2007-02-26 16:16:36.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Var-13 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T1;value="1.5cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0721 S0721-Feb26-15-03-59 2007-02-26 16:16:39.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Var-13 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0721 S0721-Feb26-15-03-59 2007-02-26 16:17:11.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Var-13 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0721 S0721-Feb26-15-03-59 2007-02-26 16:17:13.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 2 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0721 S0721-Feb26-15-03-59 2007-02-26 16:17:13.0 US/Eastern DELETION ELEC* ELEC3A Var-13 Delete label=s Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:17:52.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 INCORRECT Vector-14 label="d";type=Displacement;body=electron;agent=NIL;time=T1;dir=90;mag=101 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 30 S0721 S0721-Feb26-15-03-59 2007-02-26 16:18:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 CORRECT Vector-14 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=101 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 31 S0721 S0721-Feb26-15-03-59 2007-02-26 16:18:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 5 "d=.015m" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 34 (= s_ELECTRON_12 (DNUM 0.015 m)) S0721 S0721-Feb26-15-03-59 2007-02-26 16:18:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 2 TRUE_BUT_IRRELEVANT 6 "v^2=2*a*d" Joint Explanation Experimental (= (^ v_ELECTRON_2 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12)) S0721 S0721-Feb26-15-03-59 2007-02-26 16:19:03.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 3 CORRECT 7 "v" Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:19:14.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 INCORRECT Answer-1 "1.03m/s" Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:19:23.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 2 CORRECT Answer-1 "1.03e+7m/s" Joint Explanation Experimental 57 S0721 S0721-Feb26-15-03-59 2007-02-26 16:31:45.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0721 S0721-Feb26-15-03-59 2007-02-26 16:31:54.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 25 S0721 S0721-Feb26-15-03-59 2007-02-26 16:32:17.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-669 label="F";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=100 Joint Explanation Experimental DRAW-WEIGHT S0721 S0721-Feb26-15-03-59 2007-02-26 16:32:53.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-670 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=125 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0721 S0721-Feb26-15-03-59 2007-02-26 16:33:16.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-671 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=91;mag=111 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 24 S0721 S0721-Feb26-15-03-59 2007-02-26 16:33:20.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-671 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=111 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0721 S0721-Feb26-15-03-59 2007-02-26 16:33:30.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 2 CORRECT Vector-669 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=100 Joint Explanation Experimental DRAW-WEIGHT S0721 S0721-Feb26-15-03-59 2007-02-26 16:33:59.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-672 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=92 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0721 S0721-Feb26-15-03-59 2007-02-26 16:34:15.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-673 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0721 S0721-Feb26-15-03-59 2007-02-26 16:34:44.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-674 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31kg" Joint Explanation Experimental DEFINE-MASS 28 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0721 S0721-Feb26-15-03-59 2007-02-26 16:35:00.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-675 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19C" Joint Explanation Experimental DEFINE-CHARGE 32 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0721 S0721-Feb26-15-03-59 2007-02-26 16:35:17.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 0 "E=4.00e-12N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 36 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0721 S0721-Feb26-15-03-59 2007-02-26 16:35:41.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 1 "Fe=E*abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 48 (= Fe_ELECTRON_UNSPECIFIED_12 (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON))) S0721 S0721-Feb26-15-03-59 2007-02-26 16:35:47.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 CORRECT 2 "Fg=m*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH)) S0721 S0721-Feb26-15-03-59 2007-02-26 16:36:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 3 "vi=4.30m/s" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 51 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0721 S0721-Feb26-15-03-59 2007-02-26 16:36:50.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 1 CORRECT 4 "vf=0m/s" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s)) S0721 S0721-Feb26-15-03-59 2007-02-26 16:37:29.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 1 CORRECT 5 "Fe" Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:38:16.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-676 label="d";type=Displacement;body=electron;agent=NIL;time=T1;dir=90;mag=103 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0721 S0721-Feb26-15-03-59 2007-02-26 16:38:29.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-676 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=103 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0721 S0721-Feb26-15-03-59 2007-02-26 16:38:29.0 US/Eastern DELETION ELEC* ELEC6A 6 Delete Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:41:33.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-677 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=270;mag=71 Joint Explanation Experimental DRAW-NET-FORCE-FROM-ACCEL S0721 S0721-Feb26-15-03-59 2007-02-26 16:41:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 1 TRUE_BUT_IRRELEVANT 6 "F=Fg-Fe" Joint Explanation Experimental (= Fnet_ELECTRON_12 (- Fw_ELECTRON_EARTH_12 Fe_ELECTRON_UNSPECIFIED_12)) S0721 S0721-Feb26-15-03-59 2007-02-26 16:41:44.0 US/Eastern DELETION ELEC* ELEC6A 7 Delete Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:42:25.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-678 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=71 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN S0721 S0721-Feb26-15-03-59 2007-02-26 16:42:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 2 TRUE_BUT_IRRELEVANT 7 "F=m*a" Joint Explanation Experimental (= Fnet_ELECTRON_12 (* m_ELECTRON a_ELECTRON_12)) S0721 S0721-Feb26-15-03-59 2007-02-26 16:43:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 INCORRECT 8 "vf^2=vi^2+2*a*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0721 S0721-Feb26-15-03-59 2007-02-26 16:43:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 2 INCORRECT 8 "vf^2=vi^2+2*a*d" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0721 S0721-Feb26-15-03-59 2007-02-26 16:43:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 3 INCORRECT 8 "vf^2=vi^2+2*a*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0721 S0721-Feb26-15-03-59 2007-02-26 16:43:42.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 4 HINT 8 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO S0721 S0721-Feb26-15-03-59 2007-02-26 16:44:04.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 5 HINT 8 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO S0721 S0721-Feb26-15-03-59 2007-02-26 16:44:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 6 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Joint Explanation Experimental WRITE-LK-NO-T-COMPO 46 S0721 S0721-Feb26-15-03-59 2007-02-26 16:44:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 7 CORRECT 8 "vf_y^2=vi_y^2+2*a_y*d_y" Joint Explanation Experimental WRITE-LK-NO-T-COMPO 57 (= (^ Yc_v_ELECTRON_2_0 2) (+ (^ Yc_v_ELECTRON_1_0 2) (* (* 2 Yc_a_ELECTRON_12_0) Yc_s_ELECTRON_12_0))) S0721 S0721-Feb26-15-03-59 2007-02-26 16:45:00.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 2 INCORRECT 9 "d_y" Unable to solve for d_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:45:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 CORRECT 9 "vi=vi_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= v_ELECTRON_1 Yc_v_ELECTRON_1_0) S0721 S0721-Feb26-15-03-59 2007-02-26 16:46:04.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 1 CORRECT 10 "vf=vf_y" Joint Explanation Experimental COMPO-ZERO-VECTOR (= v_ELECTRON_2 Yc_v_ELECTRON_2_0) S0721 S0721-Feb26-15-03-59 2007-02-26 16:46:04.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 2 CORRECT 10 "vf=vf_y" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= v_ELECTRON_2 Yc_v_ELECTRON_2_0) S0721 S0721-Feb26-15-03-59 2007-02-26 16:46:08.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 3 INCORRECT 11 "a=a_y" Joint Explanation Experimental (= a_ELECTRON_12 Yc_a_ELECTRON_12_0) S0721 S0721-Feb26-15-03-59 2007-02-26 16:46:15.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC6A No Intepretation 4 HINT 11 What equation do you wish to write? 1 Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:46:19.0 US/Eastern CANCEL ELEC* ELEC6A Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:47:15.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 5 TRUE_BUT_IRRELEVANT 11 "a=-a_y" Joint Explanation Experimental (= a_ELECTRON_12 (- Yc_a_ELECTRON_12_0)) S0721 S0721-Feb26-15-03-59 2007-02-26 16:47:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 CORRECT 12 "d=d_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= s_ELECTRON_12 Yc_s_ELECTRON_12_0) S0721 S0721-Feb26-15-03-59 2007-02-26 16:47:29.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 3 CORRECT 13 "d_y" Joint Explanation Experimental S0721 S0721-Feb26-15-03-59 2007-02-26 16:47:40.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC6A Answer-1 1 CORRECT Answer-1 "1.02m" Joint Explanation Experimental 82 S0722 S0722-Feb27-08-32-27 2007-02-27 08:42:08.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 1 CORRECT Axes-1 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 15 S0722 S0722-Feb27-08-32-27 2007-02-27 08:42:15.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 2 CORRECT Axes-1 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES S0722 S0722-Feb27-08-32-27 2007-02-27 08:43:00.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 INCORRECT Vector-2 label="E";type=E-field;body=region;agent=particle;time=NIL;dir=22;mag=147 Self-explanation Control DRAW-FIELD-GIVEN-DIR 13 S0722 S0722-Feb27-08-32-27 2007-02-27 08:43:26.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 1 CORRECT System-3 label="q";body=particle;time=NIL Self-explanation Control DRAW-BODY 24 S0722 S0722-Feb27-08-32-27 2007-02-27 08:43:36.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 HINT Vector-2 label=E Is the particle the source of the electric field you are defining? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 08:43:50.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 3 CORRECT Vector-2 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=147 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 08:44:58.0 US/Eastern ATTEMPT Variable RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 INCORRECT Var-4 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6" Forgot to put units on a number. 1 Self-explanation Control DEFINE-CHARGE 23 (= Q_PARTICLE (- 7.900000000000001e-6)) S0722 S0722-Feb27-08-32-27 2007-02-27 08:45:15.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 CORRECT Var-4 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6C" Self-explanation Control DEFINE-CHARGE 31 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0722 S0722-Feb27-08-32-27 2007-02-27 08:45:43.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 4 CORRECT Vector-2 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=147 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 08:46:05.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 0 "E=14.3e+3 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 39 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0722 S0722-Feb27-08-32-27 2007-02-27 08:47:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 INCORRECT 1 "F=abs(q)*E" Undefined variable: F 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 38 S0722 S0722-Feb27-08-32-27 2007-02-27 08:48:08.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT Vector-4 label=F Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 08:50:32.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 INCORRECT Vector-5 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Magnetic;time=T0;dir=22;mag=69 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 08:50:41.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 4 INCORRECT Vector-5 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=22;mag=70 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0722 S0722-Feb27-08-32-27 2007-02-27 08:50:43.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 5 HINT Vector-5 label=F Do you really want the direction of that vector to be 22 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 08:50:48.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 6 HINT Since the forces acting on the particle at T0 are all pointing in the same direction, the direction of the total force is known. 2 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0722 S0722-Feb27-08-32-27 2007-02-27 08:51:27.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 7 INCORRECT Vector-5 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Magnetic;time=T0;dir=202;mag=72 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 08:51:30.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 8 HINT Vector-5 label=F There is indeed a force on the particle due to an unspecified agent, but it is not a magnetic force. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 08:51:48.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 9 CORRECT Vector-5 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=72 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 08:51:55.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 CORRECT 1 "F=abs(q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 73 (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED)) S0722 S0722-Feb27-08-32-27 2007-02-27 08:52:06.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 2 "F" Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 08:52:16.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 "0.113 N" Self-explanation Control 98 S0722 S0722-Feb27-08-32-27 2007-02-27 09:02:53.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-667 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-COMPO-FORM-AXES 15 S0722 S0722-Feb27-08-32-27 2007-02-27 09:03:13.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-668 label="q";body=electron;time=NIL Self-explanation Control DRAW-BODY 25 S0722 S0722-Feb27-08-32-27 2007-02-27 09:03:49.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-669 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Self-explanation Control DEFINE-CHARGE 32 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0722 S0722-Feb27-08-32-27 2007-02-27 09:04:39.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-670 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 40 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0722 S0722-Feb27-08-32-27 2007-02-27 09:05:34.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 CORRECT Vector-671 label="F";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=98 Self-explanation Control DRAW-WEIGHT S0722 S0722-Feb27-08-32-27 2007-02-27 09:06:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-672 label="E";type=E-field;body=region;agent=electron;time=NIL;dir=90;mag=93 Self-explanation Control DRAW-FIELD-GIVEN-DIR 39 S0722 S0722-Feb27-08-32-27 2007-02-27 09:06:13.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 INCORRECT Vector-672 label="E";type=E-field;body=region;agent=electron;time=NIL;dir=270;mag=93 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 09:06:17.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 HINT Vector-672 label=E Is the electron the source of the electric field you are defining? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 09:06:28.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 CORRECT Vector-672 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=93 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 09:06:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 CORRECT 0 "F=m*g" Self-explanation Control WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0722 S0722-Feb27-08-32-27 2007-02-27 09:06:58.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 INCORRECT 1 "E=F" Units are inconsistent. 1 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 38 (= E_REGION_UNSPECIFIED Fw_ELECTRON_EARTH_1) S0722 S0722-Feb27-08-32-27 2007-02-27 09:06:58.0 US/Eastern DELETION ELEC* ELEC1C 1 Delete Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:08:38.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 2 INCORRECT 1 "Fe=abs(q)*E" Undefined variable: Fe 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 09:10:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 3 CORRECT Vector-673 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=82 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 09:10:10.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 1 "Fe=abs(q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 73 (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0722 S0722-Feb27-08-32-27 2007-02-27 09:10:16.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 CORRECT 2 "Fe=F" Self-explanation Control COMPO-ZERO-VECTOR (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0722 S0722-Feb27-08-32-27 2007-02-27 09:10:16.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 2 "Fe=F" Self-explanation Control COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0722 S0722-Feb27-08-32-27 2007-02-27 09:10:16.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 2 "Fe=F" Self-explanation Control WRITE-NET-FORCE-COMPO (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0722 S0722-Feb27-08-32-27 2007-02-27 09:10:16.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 2 "Fe=F" Self-explanation Control COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0722 S0722-Feb27-08-32-27 2007-02-27 09:10:23.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 CORRECT 3 "Fe" Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:10:32.0 US/Eastern ATTEMPT Answer RESULT Unsolicited ELEC* ELEC1C Answer-1 1 INCORRECT Answer-1 "8.93e30N" Units are inconsistent. 1 1 Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:11:07.0 US/Eastern ATTEMPT Answer RESULT Unsolicited ELEC* ELEC1C Answer-1 2 INCORRECT Answer-1 "8.93e -30 N" Syntax error in E=8.93e -30 N 1 Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:11:20.0 US/Eastern ATTEMPT Answer RESULT Unsolicited ELEC* ELEC1C Answer-1 3 INCORRECT Answer-1 "8.93e-30 N" Units are inconsistent. 1 1 Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:12:02.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 2 CORRECT 4 "E" Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:12:14.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 4 INCORRECT Answer-1 "5.58e11 N/C" Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:12:19.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 5 CORRECT Answer-1 "5.58e-11 N/C" Self-explanation Control 94 S0722 S0722-Feb27-08-32-27 2007-02-27 09:24:21.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 CORRECT System-1 label="q";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 S0722 S0722-Feb27-08-32-27 2007-02-27 09:24:39.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-2 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.6e-19 C" Self-explanation Control DEFINE-CHARGE 19 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0722 S0722-Feb27-08-32-27 2007-02-27 09:25:03.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-3 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 22 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0722 S0722-Feb27-08-32-27 2007-02-27 09:25:34.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 INCORRECT Var-4 label="d";quant=length;subtype=NIL;body=plates;agent=NIL;time=NIL;value="1.5 cm" Self-explanation Control DRAW-FIELD-GIVEN-DIR 21 S0722 S0722-Feb27-08-32-27 2007-02-27 09:25:36.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 2 HINT Var-4 label=d Although you can always define a length variable, none are needed for any solution I know of this problem. 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 09:25:36.0 US/Eastern DELETION ELEC* ELEC3A Var-4 Delete label=d Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:26:01.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 3 CORRECT Vector-5 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=84 Self-explanation Control DRAW-FIELD-GIVEN-DIR 22 S0722 S0722-Feb27-08-32-27 2007-02-27 09:26:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 0 "E=2.00e+4 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 25 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0722 S0722-Feb27-08-32-27 2007-02-27 09:26:51.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-6 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T0;dir=90;mag=48 Self-explanation Control DRAW-ACCEL-SPEED-UP S0722 S0722-Feb27-08-32-27 2007-02-27 09:26:57.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (DRAW-AXES 0) 1 HINT Vector-6 label=a You don't need to draw the accel at T0. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-UNROTATED-AXES S0722 S0722-Feb27-08-32-27 2007-02-27 09:27:17.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (DRAW-AXES 0) 2 HINT It is now a good idea for you to draw an axis. This will help to ground your work and be useful later on in the process. 1 Self-explanation Control DRAW-UNROTATED-AXES S0722 S0722-Feb27-08-32-27 2007-02-27 09:27:32.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 3 CORRECT Axes-7 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 35 S0722 S0722-Feb27-08-32-27 2007-02-27 09:27:55.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 CORRECT Vector-8 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=74 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0722 S0722-Feb27-08-32-27 2007-02-27 09:27:55.0 US/Eastern DELETION ELEC* ELEC3A Vector-6 Delete label=a Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:29:01.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-9 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=19 Self-explanation Control DRAW-ACCEL-SPEED-UP S0722 S0722-Feb27-08-32-27 2007-02-27 09:29:24.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT 1 "a=vf/T1" Undefined variable: T1 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 09:29:31.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 09:29:31.0 US/Eastern DELETION ELEC* ELEC3A 1 Delete Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:30:37.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT Vector-10 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=53 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 34 S0722 S0722-Feb27-08-32-27 2007-02-27 09:30:44.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 4 INCORRECT Vector-10 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T1;dir=90;mag=53 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 09:30:47.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT Vector-10 label=Fe Is the force is due to an unspecified agent? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 09:30:59.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 6 INCORRECT Vector-10 label="Fe";type=Force;body=electron;agent=plates;forcetype=Electric;time=T1;dir=90;mag=53 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 09:31:04.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 7 CORRECT Vector-10 label="Fe";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=53 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 09:31:18.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 CORRECT 1 "Fe=abs(q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 46 (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES)) S0722 S0722-Feb27-08-32-27 2007-02-27 09:31:29.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 2 "Fe=me*a" Self-explanation Control (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) S0722 S0722-Feb27-08-32-27 2007-02-27 09:31:43.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A CALC_REQUEST 1 INCORRECT 3 "a=vf/T1" Undefined variable: T1 1 Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:32:25.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 2 CORRECT 3 "a" Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:32:25.0 US/Eastern DELETION ELEC* ELEC3A 3 Delete Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:35:38.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-11 label="d";quant=length;subtype=NIL;body=plates;agent=NIL;time=NIL;value="1.5 cm" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0722 S0722-Feb27-08-32-27 2007-02-27 09:35:41.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Var-11 label=d Although you can always define a length variable, none are needed for any solution I know of this problem. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0722 S0722-Feb27-08-32-27 2007-02-27 09:39:39.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 CORRECT Vector-12 label="de";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=50 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0722 S0722-Feb27-08-32-27 2007-02-27 09:39:39.0 US/Eastern DELETION ELEC* ELEC3A Var-11 Delete label=d Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:40:04.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 1 INCORRECT 4 "de=.5*a*t^2" Undefined variable: t 1 Self-explanation Control DEFINE-DURATION S0722 S0722-Feb27-08-32-27 2007-02-27 09:40:17.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 2 INCORRECT 4 "de=.5*a*T1^2" Undefined variable: T1 1 Self-explanation Control DEFINE-DURATION 45 S0722 S0722-Feb27-08-32-27 2007-02-27 09:40:26.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 3 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DEFINE-DURATION S0722 S0722-Feb27-08-32-27 2007-02-27 09:40:52.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 4 CORRECT Var-13 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Self-explanation Control DEFINE-DURATION 46 S0722 S0722-Feb27-08-32-27 2007-02-27 09:40:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 2 TRUE_BUT_IRRELEVANT 4 "de=.5*a*t^2" Self-explanation Control (= s_ELECTRON_12 (* (* 0.5 a_ELECTRON_12) (^ t_12 2))) S0722 S0722-Feb27-08-32-27 2007-02-27 09:41:03.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 3 INCORRECT 5 "t" Unable to solve for t. One thing you probably need is an equation specifying the given value of de. 1 1 Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:41:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 5 "de=1.5 cm" Self-explanation Control WRITE-KNOWN-VALUE-EQN 49 (= s_ELECTRON_12 (DNUM 1.5 cm)) S0722 S0722-Feb27-08-32-27 2007-02-27 09:41:24.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 4 CORRECT 6 "t" Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:41:36.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 3 TRUE_BUT_IRRELEVANT 7 "a=vf/t" Self-explanation Control 50 (= a_ELECTRON_12 (/ v_ELECTRON_2 t_12)) S0722 S0722-Feb27-08-32-27 2007-02-27 09:41:43.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 5 CORRECT 8 "vf" Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 09:41:57.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.03e+7 m/s" Self-explanation Control 75 S0722 S0722-Feb27-08-32-27 2007-02-27 09:55:40.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-667 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 15 S0722 S0722-Feb27-08-32-27 2007-02-27 09:55:50.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 INCORRECT System-668 label="q";body=earth;time=NIL Self-explanation Control DRAW-BODY 12 S0722 S0722-Feb27-08-32-27 2007-02-27 09:56:14.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 HINT System-668 label=q What other bodies can you define? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 09:56:41.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 HINT Analyzing the electron is more important for solving this problem. 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 09:57:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 CORRECT Vector-669 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=151 Self-explanation Control DRAW-FIELD-GIVEN-DIR 13 S0722 S0722-Feb27-08-32-27 2007-02-27 09:57:27.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 INCORRECT 0 "E=4.00e12 N/c" Undefined variable: c 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN 12 S0722 S0722-Feb27-08-32-27 2007-02-27 09:57:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 2 INCORRECT 0 "E=4.00e12 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN (= E_REGION_UNSPECIFIED (DNUM 4.0e+12 N/C)) S0722 S0722-Feb27-08-32-27 2007-02-27 09:57:38.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 3 CORRECT 0 "E=4.00e-12 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 16 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0722 S0722-Feb27-08-32-27 2007-02-27 09:58:05.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-670 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 20 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0722 S0722-Feb27-08-32-27 2007-02-27 09:58:21.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-671 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.6e-19 C" Self-explanation Control DEFINE-CHARGE 24 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0722 S0722-Feb27-08-32-27 2007-02-27 09:58:42.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-672 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=71 Self-explanation Control DRAW-VELOCITY-STRAIGHT 25 S0722 S0722-Feb27-08-32-27 2007-02-27 09:58:56.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 1 "vi=4.3 m/s" Self-explanation Control WRITE-KNOWN-VALUE-EQN 28 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0722 S0722-Feb27-08-32-27 2007-02-27 09:59:44.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-673 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=270;mag=41 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 09:59:49.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Vector-673 label=Fe Do you really want the direction of that vector to be 270 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 10:00:02.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 CORRECT Vector-673 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=41 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0722 S0722-Feb27-08-32-27 2007-02-27 10:01:23.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 INCORRECT Vector-674 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=25 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0722 S0722-Feb27-08-32-27 2007-02-27 10:01:28.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 CORRECT Vector-674 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=25 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0722 S0722-Feb27-08-32-27 2007-02-27 10:01:32.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 2 INCORRECT 2 "Fe=me*a" Self-explanation Control DEFINE-MASS (= Fe_ELECTRON_UNSPECIFIED_12 (* m_ELECTRON a_ELECTRON_12)) S0722 S0722-Feb27-08-32-27 2007-02-27 10:01:56.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 3 HINT 2 What equation do you wish to write? 1 Self-explanation Control DEFINE-MASS S0722 S0722-Feb27-08-32-27 2007-02-27 10:02:05.0 US/Eastern CANCEL ELEC* ELEC6A Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:02:11.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 4 CORRECT Var-670 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS (= m_ELECTRON (DNUM 9.11e-31 kg)) S0722 S0722-Feb27-08-32-27 2007-02-27 10:02:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 INCORRECT 2 "Fe=m*a" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_ELECTRON_UNSPECIFIED_12 (* m_ELECTRON a_ELECTRON_12)) S0722 S0722-Feb27-08-32-27 2007-02-27 10:02:35.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 CORRECT 2 "Fe=abs(q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 40 (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0722 S0722-Feb27-08-32-27 2007-02-27 10:02:42.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 3 CORRECT Vector-674 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=25 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0722 S0722-Feb27-08-32-27 2007-02-27 10:03:05.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-675 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0722 S0722-Feb27-08-32-27 2007-02-27 10:03:20.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-676 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=53 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0722 S0722-Feb27-08-32-27 2007-02-27 10:03:50.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (DURATION (DURING 1 2))) 1 CORRECT Var-677 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Self-explanation Control DEFINE-DURATION S0722 S0722-Feb27-08-32-27 2007-02-27 10:04:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 1 INCORRECT 3 "a=(vf-vi)/t" Self-explanation Control COMPO-ZERO-VECTOR (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0722 S0722-Feb27-08-32-27 2007-02-27 10:04:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 1 INCORRECT 3 "a=(vf-vi)/t" Self-explanation Control WRITE-LK-NO-S-COMPO (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0722 S0722-Feb27-08-32-27 2007-02-27 10:04:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 1 INCORRECT 3 "a=(vf-vi)/t" Self-explanation Control WRITE-IMPLICIT-EQN (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0722 S0722-Feb27-08-32-27 2007-02-27 10:04:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 INCORRECT 3 "a=(vf-vi)/t" Self-explanation Control COMPO-PARALLEL-AXIS (= a_ELECTRON_12 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0722 S0722-Feb27-08-32-27 2007-02-27 10:04:52.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A CALC_REQUEST 1 HINT 3 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:05:06.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A CALC_REQUEST 2 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Self-explanation Control 35 S0722 S0722-Feb27-08-32-27 2007-02-27 10:05:42.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 3 CORRECT 3 "Fe" Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:05:42.0 US/Eastern DELETION ELEC* ELEC6A 3 Delete Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:06:43.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-678 label="Fw";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=74 Self-explanation Control DRAW-WEIGHT S0722 S0722-Feb27-08-32-27 2007-02-27 10:07:11.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-679 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=270;mag=50 Self-explanation Control DRAW-NET-FORCE-FROM-ACCEL S0722 S0722-Feb27-08-32-27 2007-02-27 10:07:20.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 1 TRUE_BUT_IRRELEVANT 4 "F=Fw-Fe" Self-explanation Control (= Fnet_ELECTRON_12 (- Fw_ELECTRON_EARTH_12 Fe_ELECTRON_UNSPECIFIED_12)) S0722 S0722-Feb27-08-32-27 2007-02-27 10:07:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 CORRECT 5 "Fw=m*g" Self-explanation Control WT-LAW (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH)) S0722 S0722-Feb27-08-32-27 2007-02-27 10:07:38.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 4 CORRECT 6 "F" Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:07:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 2 TRUE_BUT_IRRELEVANT 7 "F=m*a" Self-explanation Control (= Fnet_ELECTRON_12 (* m_ELECTRON a_ELECTRON_12)) S0722 S0722-Feb27-08-32-27 2007-02-27 10:09:18.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 2 INCORRECT 8 "d=vi*t+.5*a*t^2" Self-explanation Control COMPO-PARALLEL-AXIS (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 a_ELECTRON_12) (^ t_12 2)))) S0722 S0722-Feb27-08-32-27 2007-02-27 10:09:18.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 INCORRECT 8 "d=vi*t+.5*a*t^2" Self-explanation Control WRITE-LK-NO-T-COMPO (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 a_ELECTRON_12) (^ t_12 2)))) S0722 S0722-Feb27-08-32-27 2007-02-27 10:09:18.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 INCORRECT 8 "d=vi*t+.5*a*t^2" Self-explanation Control COMPO-PARALLEL-AXIS (= s_ELECTRON_12 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 a_ELECTRON_12) (^ t_12 2)))) S0722 S0722-Feb27-08-32-27 2007-02-27 10:09:18.0 US/Eastern DELETION ELEC* ELEC6A 8 Delete Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:10:08.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 2 HINT System-668 label=q What other bodies can you define? 1 Self-explanation Control DRAW-WEIGHT S0722 S0722-Feb27-08-32-27 2007-02-27 10:10:26.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 3 HINT Analyzing the electron is more important for solving this problem. 2 Self-explanation Control DRAW-WEIGHT S0722 S0722-Feb27-08-32-27 2007-02-27 10:10:45.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 4 CORRECT Vector-678 label="Fw";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=74 Self-explanation Control DRAW-WEIGHT S0722 S0722-Feb27-08-32-27 2007-02-27 10:10:56.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 2 CORRECT System-668 label="q";body=electron;time=NIL Self-explanation Control DRAW-BODY 45 S0722 S0722-Feb27-08-32-27 2007-02-27 10:11:10.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 5 CORRECT 8 "a" Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:11:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 3 TRUE_BUT_IRRELEVANT 9 "a=vi/t" Self-explanation Control (= a_ELECTRON_12 (/ v_ELECTRON_1 t_12)) S0722 S0722-Feb27-08-32-27 2007-02-27 10:11:37.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 6 CORRECT 10 "t" Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:14:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 3 INCORRECT 11 "d=.5*a*t^2+vi*t" Self-explanation Control COMPO-PARALLEL-AXIS (= s_ELECTRON_12 (+ (* (* 0.5 a_ELECTRON_12) (^ t_12 2)) (* v_ELECTRON_1 t_12))) S0722 S0722-Feb27-08-32-27 2007-02-27 10:14:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 2 INCORRECT 11 "d=.5*a*t^2+vi*t" Self-explanation Control WRITE-LK-NO-T-COMPO (= s_ELECTRON_12 (+ (* (* 0.5 a_ELECTRON_12) (^ t_12 2)) (* v_ELECTRON_1 t_12))) S0722 S0722-Feb27-08-32-27 2007-02-27 10:14:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 2 INCORRECT 11 "d=.5*a*t^2+vi*t" Self-explanation Control COMPO-PARALLEL-AXIS (= s_ELECTRON_12 (+ (* (* 0.5 a_ELECTRON_12) (^ t_12 2)) (* v_ELECTRON_1 t_12))) S0722 S0722-Feb27-08-32-27 2007-02-27 10:14:17.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC6A No Intepretation 4 HINT 10 Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:14:31.0 US/Eastern CANCEL ELEC* ELEC6A Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:14:36.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A No Intepretation 5 HINT 11 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:15:02.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A No Intepretation 6 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Self-explanation Control 40 S0722 S0722-Feb27-08-32-27 2007-02-27 10:15:25.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC6A No Intepretation 7 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:15:39.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A No Intepretation 8 HINT #.(wb-quant '(define-variable "s" |NIL| |distance| |electron| |T1| |NIL| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. 2 Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:15:59.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A No Intepretation 9 HINT #.(wb-quant '(define-variable "t" |NIL| |duration| |NIL| |T0 to T1| |NIL| NIL "") 'NIL) That quantity is not sought by the problem statement. 3 Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:16:14.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG NextStepHelp ELEC* ELEC6A No Intepretation 10 HINT #.(wb-quant '(define-variable "s" |NIL| |distance| |electron| |T0 to T1| |NIL| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. Let's just assume that you are seeking the magnitude of the displacement of the electron from T0 to T1. 4 4 Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:16:20.0 US/Eastern HINT_REQUEST Choose- HINT_MSG Ask-Principle ELEC* ELEC6A No Intepretation 11 HINT "OK" What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 5 Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:17:19.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC6A No Intepretation 12 HINT (lk-no-vf ((?axis . y))) Right. Try writing a constant acceleration equation in terms of vector components along the Y axis. 6 Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:17:27.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A No Intepretation 13 HINT Do you know an equation relating the components of displacement to those of initial velocity, time, and acceleration when acceleration is constant? 7 Self-explanation Control WRITE-LK-NO-VF-COMPO S0722 S0722-Feb27-08-32-27 2007-02-27 10:18:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 14 TRUE_BUT_IRRELEVANT 11 "d=vi*t-0.5*a*t^2" Self-explanation Control (= s_ELECTRON_12 (- (* v_ELECTRON_1 t_12) (* (* 0.5 a_ELECTRON_12) (^ t_12 2)))) S0722 S0722-Feb27-08-32-27 2007-02-27 10:18:08.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 7 CORRECT 12 "d" Self-explanation Control S0722 S0722-Feb27-08-32-27 2007-02-27 10:18:17.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC6A Answer-1 1 CORRECT Answer-1 "1.02 m" Self-explanation Control 65 S0723 S0723-Feb28-15-09-52 2007-02-28 15:17:45.0 US/Eastern DELETION FOR* FOR4C Axes-1 Delete label=NIL Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 15:17:45.0 US/Eastern DELETION FOR* FOR4C Axes-2 Delete label=NIL Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 15:17:45.0 US/Eastern DELETION FOR* FOR4C Axes-3 Delete label=NIL Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 15:17:45.0 US/Eastern DELETION FOR* FOR4C Vector-4 Delete label=NIL Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 15:19:30.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 1 CORRECT System-5 label="particle";body=particle;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0723 S0723-Feb28-15-09-52 2007-02-28 15:19:30.0 US/Eastern DELETION FOR* FOR4C Axes-6 Delete label=NIL Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 15:20:07.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 1 CORRECT Axes-7 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 25 S0723 S0723-Feb28-15-09-52 2007-02-28 15:20:51.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 INCORRECT Vector-8 label="E";type=E-field;body=region;agent=particle;time=NIL;dir=22;mag=119 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 23 S0723 S0723-Feb28-15-09-52 2007-02-28 15:21:51.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (BODY PARTICLE TIME NIL) 2 INCORRECT 0 "E=14.3e+3" The variable E is not used in any solution I know of. 1 Joint Explanation Experimental DRAW-BODY 22 S0723 S0723-Feb28-15-09-52 2007-02-28 15:21:57.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (BODY PARTICLE TIME NIL) 3 HINT I can only recognize equations and variables from solutions I know about. This variable is not used in any of the solutions I have recorded for this problem. It's possible you are pursuing a solution that I don't know about, but if so, I can't help you with it and simpler solutions are probably available. 2 2 Joint Explanation Experimental DRAW-BODY S0723 S0723-Feb28-15-09-52 2007-02-28 15:21:57.0 US/Eastern DELETION FOR* FOR4C Vector-9 Delete label=NIL Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 15:22:37.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 4 CORRECT System-5 label="particle";body=particle;time=NIL Joint Explanation Experimental DRAW-BODY 23 S0723 S0723-Feb28-15-09-52 2007-02-28 15:22:37.0 US/Eastern DELETION FOR* FOR4C System-10 Delete label=NIL Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 15:23:34.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 5 CORRECT System-5 label="q";body=particle;time=NIL Joint Explanation Experimental DRAW-BODY S0723 S0723-Feb28-15-09-52 2007-02-28 15:24:29.0 US/Eastern ATTEMPT Variable RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 INCORRECT Var-11 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6" Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE (= Q_PARTICLE (- 7.900000000000001e-6)) S0723 S0723-Feb28-15-09-52 2007-02-28 15:25:00.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 CORRECT Var-12 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Joint Explanation Experimental DEFINE-CHARGE 31 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0723 S0723-Feb28-15-09-52 2007-02-28 15:25:00.0 US/Eastern DELETION FOR* FOR4C Var-11 Delete label=q Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 15:25:06.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 3 CORRECT Var-12 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Joint Explanation Experimental DEFINE-CHARGE (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0723 S0723-Feb28-15-09-52 2007-02-28 15:25:06.0 US/Eastern DELETION FOR* FOR4C Vector-13 Delete label=NIL Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 15:25:06.0 US/Eastern DELETION FOR* FOR4C 0 Delete Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 15:27:33.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 HINT Vector-8 label=E Is the particle the source of the electric field you are defining? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 15:28:22.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 3 CORRECT Vector-8 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=119 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 15:28:42.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 0 "E=14.3e+3 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 38 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0723 S0723-Feb28-15-09-52 2007-02-28 15:30:33.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 INCORRECT 1 "E*q" Syntax error in E*q 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR ? S0723 S0723-Feb28-15-09-52 2007-02-28 15:30:37.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT Vector-4 label=F The entry needs an = sign to be an equation. 2 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 15:31:57.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 INCORRECT Vector-14 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=181;mag=103 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 15:32:02.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 4 HINT Vector-14 label=F Do you really want the direction of that vector to be 181 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 15:32:07.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 5 HINT Think about how the direction of the electric force on the particle due to an unspecified agent is related to the direction of the electric field vector. 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 15:32:14.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 6 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 3 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 15:32:45.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 7 INCORRECT Vector-14 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=181;mag=103 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 15:33:12.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 8 INCORRECT Vector-14 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=103 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 15:33:20.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 9 INCORRECT Vector-14 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=-22;mag=103 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 37 S0723 S0723-Feb28-15-09-52 2007-02-28 15:33:36.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 10 INCORRECT Vector-14 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=-202;mag=103 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 15:33:43.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 11 CORRECT Vector-14 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=103 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 15:34:06.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 INCORRECT 1 "F=E*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0723 S0723-Feb28-15-09-52 2007-02-28 15:34:09.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 2 HINT 1 Normally, this equation is written using an absolute value. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0723 S0723-Feb28-15-09-52 2007-02-28 15:34:25.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 3 CORRECT 1 "F=E*abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 72 (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED (ABS Q_PARTICLE))) S0723 S0723-Feb28-15-09-52 2007-02-28 15:34:33.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 2 "F" Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 15:34:46.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 "0.11297 N" Joint Explanation Experimental 97 S0723 S0723-Feb28-15-09-52 2007-02-28 15:46:13.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-667 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-COMPO-FORM-AXES 15 S0723 S0723-Feb28-15-09-52 2007-02-28 15:46:19.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 2 CORRECT Axes-667 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-COMPO-FORM-AXES S0723 S0723-Feb28-15-09-52 2007-02-28 15:47:12.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-668 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=26;mag=106 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 13 S0723 S0723-Feb28-15-09-52 2007-02-28 15:47:15.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 HINT Vector-668 label=E Do you really want the direction of that vector to be 26 degrees? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 15:47:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 HINT You can determine the direction of the electric field at the region due to an unspecified agent from the problem statement 2 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 15:47:25.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 HINT Use the electric field drawing tool to draw the electric field at the region due to an unspecified agent in the given direction of 270 degrees. 3 3 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 8 S0723 S0723-Feb28-15-09-52 2007-02-28 15:47:43.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 CORRECT Vector-668 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=106 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 9 S0723 S0723-Feb28-15-09-52 2007-02-28 15:48:03.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-669 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 19 S0723 S0723-Feb28-15-09-52 2007-02-28 15:48:33.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-670 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 27 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0723 S0723-Feb28-15-09-52 2007-02-28 15:49:32.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-671 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=103 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 15:50:11.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 CORRECT Vector-672 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=111 Joint Explanation Experimental DRAW-WEIGHT S0723 S0723-Feb28-15-09-52 2007-02-28 15:50:42.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-673 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 34 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0723 S0723-Feb28-15-09-52 2007-02-28 15:51:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 CORRECT 0 "Fg=g*m" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_1 (* g_EARTH m_ELECTRON)) S0723 S0723-Feb28-15-09-52 2007-02-28 15:51:40.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 INCORRECT 1 "F=-Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 (- Fw_ELECTRON_EARTH_1)) S0723 S0723-Feb28-15-09-52 2007-02-28 15:52:08.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 2 INCORRECT 1 "0=F+Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= 0 (+ Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0723 S0723-Feb28-15-09-52 2007-02-28 15:52:08.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 3 INCORRECT 1 "0=F+Fg" Joint Explanation Experimental WRITE-NFL-COMPO (= 0 (+ Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0723 S0723-Feb28-15-09-52 2007-02-28 15:52:08.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 4 INCORRECT 1 "0=F+Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= 0 (+ Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0723 S0723-Feb28-15-09-52 2007-02-28 15:52:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 1 "0=F-Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= 0 (- Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0723 S0723-Feb28-15-09-52 2007-02-28 15:52:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 1 "0=F-Fg" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= 0 (- Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0723 S0723-Feb28-15-09-52 2007-02-28 15:52:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 1 "0=F-Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= 0 (- Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0723 S0723-Feb28-15-09-52 2007-02-28 15:52:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 5 CORRECT 1 "0=F-Fg" Joint Explanation Experimental COMPO-ZERO-VECTOR (= 0 (- Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1)) S0723 S0723-Feb28-15-09-52 2007-02-28 15:52:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 6 CORRECT 2 "F=Fg" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0723 S0723-Feb28-15-09-52 2007-02-28 15:52:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 2 CORRECT 2 "F=Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0723 S0723-Feb28-15-09-52 2007-02-28 15:52:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 2 CORRECT 2 "F=Fg" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0723 S0723-Feb28-15-09-52 2007-02-28 15:52:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 2 CORRECT 2 "F=Fg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0723 S0723-Feb28-15-09-52 2007-02-28 15:52:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 INCORRECT 3 "E=F/q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= E_REGION_UNSPECIFIED (/ Fe_ELECTRON_UNSPECIFIED_1 Q_ELECTRON)) S0723 S0723-Feb28-15-09-52 2007-02-28 15:53:04.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 INCORRECT 3 "E=q/F" Units are inconsistent. 1 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 33 (= E_REGION_UNSPECIFIED (/ Q_ELECTRON Fe_ELECTRON_UNSPECIFIED_1)) S0723 S0723-Feb28-15-09-52 2007-02-28 15:53:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 3 INCORRECT 3 "E=F/q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= E_REGION_UNSPECIFIED (/ Fe_ELECTRON_UNSPECIFIED_1 Q_ELECTRON)) S0723 S0723-Feb28-15-09-52 2007-02-28 15:53:24.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 4 HINT 3 Normally, this equation is written using an absolute value. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0723 S0723-Feb28-15-09-52 2007-02-28 15:53:32.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 5 CORRECT 3 "E=F/abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 68 (= E_REGION_UNSPECIFIED (/ Fe_ELECTRON_UNSPECIFIED_1 (ABS Q_ELECTRON))) S0723 S0723-Feb28-15-09-52 2007-02-28 15:53:39.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 CORRECT 4 "E" Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 15:54:00.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 CORRECT Answer-1 "5.58e-11 N/C" Joint Explanation Experimental 93 S0723 S0723-Feb28-15-09-52 2007-02-28 16:06:45.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-1 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0723 S0723-Feb28-15-09-52 2007-02-28 16:06:49.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 HINT Vector-1 label=a Both the time specification and the direction of that vector look odd to me. 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 16:06:54.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 2 HINT None of the solutions that I know of contain a vector for the accel at that time or in that direction. 2 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 16:06:54.0 US/Eastern DELETION ELEC* ELEC3A Vector-1 Delete label=a Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 16:07:33.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 3 CORRECT Vector-2 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=65 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 2 S0723 S0723-Feb28-15-09-52 2007-02-28 16:07:52.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 CORRECT System-3 label="q";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 13 S0723 S0723-Feb28-15-09-52 2007-02-28 16:08:06.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-4 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 18 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0723 S0723-Feb28-15-09-52 2007-02-28 16:08:20.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-5 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 22 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:08:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 0 "E=2.00e+4 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 25 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:08:39.0 US/Eastern DELETION ELEC* ELEC3A Vector-6 Delete label=NIL Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 16:10:33.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-7 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=105 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 26 S0723 S0723-Feb28-15-09-52 2007-02-28 16:10:33.0 US/Eastern DELETION ELEC* ELEC3A Vector-8 Delete label=NIL Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 16:11:35.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-9 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=53 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0723 S0723-Feb28-15-09-52 2007-02-28 16:11:43.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 1 "F=m*a" Joint Explanation Experimental (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:11:55.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 CORRECT 2 "F=abs(q)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 37 (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:12:08.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 CORRECT 3 "a" Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 16:12:57.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 CORRECT Vector-10 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=91 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0723 S0723-Feb28-15-09-52 2007-02-28 16:13:13.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 INCORRECT 4 "v=a*T1" Undefined variable: T1 1 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0723 S0723-Feb28-15-09-52 2007-02-28 16:13:18.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 3 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0723 S0723-Feb28-15-09-52 2007-02-28 16:13:18.0 US/Eastern DELETION ELEC* ELEC3A 4 Delete Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 16:14:11.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 4 CORRECT Vector-10 label="v2";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=91 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0723 S0723-Feb28-15-09-52 2007-02-28 16:14:30.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 CORRECT Vector-11 label="v0";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0723 S0723-Feb28-15-09-52 2007-02-28 16:15:10.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-12 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.50 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0723 S0723-Feb28-15-09-52 2007-02-28 16:15:15.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Var-12 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0723 S0723-Feb28-15-09-52 2007-02-28 16:15:42.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 2 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0723 S0723-Feb28-15-09-52 2007-02-28 16:15:42.0 US/Eastern DELETION ELEC* ELEC3A Var-12 Delete label=s Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 16:16:02.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 CORRECT Vector-13 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=65 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0723 S0723-Feb28-15-09-52 2007-02-28 16:16:23.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 4 "d=1.5 cm" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 41 (= s_ELECTRON_12 (DNUM 1.5 cm)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:16:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 2 TRUE_BUT_IRRELEVANT 5 "v2^2=v0^2+2*a*d" Joint Explanation Experimental (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) S0723 S0723-Feb28-15-09-52 2007-02-28 16:16:45.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 2 CORRECT 6 "v2" Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 16:16:55.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.03e+7 m/s" Joint Explanation Experimental 66 S0723 S0723-Feb28-15-09-52 2007-02-28 16:28:42.0 US/Eastern DELETION ELEC* ELEC6A Axes-667 Delete label=NIL Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 16:29:16.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 15 S0723 S0723-Feb28-15-09-52 2007-02-28 16:29:26.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-669 label="q";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 25 S0723 S0723-Feb28-15-09-52 2007-02-28 16:29:50.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-670 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 29 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0723 S0723-Feb28-15-09-52 2007-02-28 16:30:08.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-671 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:30:26.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-672 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=129 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 16:30:47.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 0 "E=4.00e-12 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 36 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:31:11.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-673 label="v";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=138 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0723 S0723-Feb28-15-09-52 2007-02-28 16:31:29.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 1 "v=4.30 m/s" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 40 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:31:51.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-674 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0723 S0723-Feb28-15-09-52 2007-02-28 16:31:56.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 2 CORRECT Vector-673 label="v0";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=138 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0723 S0723-Feb28-15-09-52 2007-02-28 16:32:11.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 2 CORRECT 1 "v0=4.30 m/s" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:32:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-675 label="Fw";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=125 Joint Explanation Experimental DRAW-WEIGHT S0723 S0723-Feb28-15-09-52 2007-02-28 16:32:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 CORRECT 2 "Fw=m*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:33:34.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-676 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=270;mag=159 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 16:33:37.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Vector-676 label=Fe Do you really want the direction of that vector to be 270 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 16:33:52.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 CORRECT Vector-676 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=159 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0723 S0723-Feb28-15-09-52 2007-02-28 16:34:15.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 INCORRECT 3 "Fe=q*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 39 (= Fe_ELECTRON_UNSPECIFIED_12 (* Q_ELECTRON E_REGION_UNSPECIFIED)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:34:40.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 CORRECT 3 "Fe=abs(q)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 51 (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:35:28.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 INCORRECT Vector-677 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=87 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN S0723 S0723-Feb28-15-09-52 2007-02-28 16:35:31.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 HINT Vector-677 label=a Notice that the electron is slowing down. 1 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN S0723 S0723-Feb28-15-09-52 2007-02-28 16:35:44.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 3 CORRECT Vector-677 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=87 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN S0723 S0723-Feb28-15-09-52 2007-02-28 16:35:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 1 INCORRECT 4 "Fe-Fw=m*a" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON a_ELECTRON_12)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:35:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 2 INCORRECT 4 "Fe-Fw=m*a" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON a_ELECTRON_12)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:35:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 3 INCORRECT 4 "Fe-Fw=m*a" Joint Explanation Experimental WRITE-NSL-COMPO (= (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON a_ELECTRON_12)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:35:51.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 4 HINT 4 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS S0723 S0723-Feb28-15-09-52 2007-02-28 16:36:10.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 5 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Joint Explanation Experimental COMPO-PARALLEL-AXIS 46 S0723 S0723-Feb28-15-09-52 2007-02-28 16:36:20.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 6 CORRECT 4 "Fe-Fw=m*a_y" Although equation 5 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 52 (= (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON Yc_a_ELECTRON_12_0)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:36:20.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 1 CORRECT 4 "Fe-Fw=m*a_y" Although equation 5 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 52 (= (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON Yc_a_ELECTRON_12_0)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:36:20.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 1 CORRECT 4 "Fe-Fw=m*a_y" Although equation 5 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-NSL-COMPO 52 (= (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON Yc_a_ELECTRON_12_0)) S0723 S0723-Feb28-15-09-52 2007-02-28 16:36:41.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT 5 "a=a_y" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT (= a_ELECTRON_12 Yc_a_ELECTRON_12_0) S0723 S0723-Feb28-15-09-52 2007-02-28 16:36:41.0 US/Eastern DELETION ELEC* ELEC6A 5 Delete Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 16:37:24.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-678 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=133 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0723 S0723-Feb28-15-09-52 2007-02-28 16:37:56.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 CORRECT 5 "vf^2=v0^2+2*a_y*d" Although equation 6 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 59 (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0723 S0723-Feb28-15-09-52 2007-02-28 16:37:56.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 CORRECT 5 "vf^2=v0^2+2*a_y*d" Although equation 6 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO 59 (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0723 S0723-Feb28-15-09-52 2007-02-28 16:37:56.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 CORRECT 5 "vf^2=v0^2+2*a_y*d" Although equation 6 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 59 (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) S0723 S0723-Feb28-15-09-52 2007-02-28 16:38:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC6A CALC_REQUEST 1 HINT It is good practice to identify the fundamental vector principles you are using by writing them purely symbolically in component form before combining them with other equations or given values. Select "Review Physics Equations" on the Help menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 16:38:34.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A CALC_REQUEST 2 INCORRECT 6 "a_y=a" Joint Explanation Experimental (= Yc_a_ELECTRON_12_0 a_ELECTRON_12) S0723 S0723-Feb28-15-09-52 2007-02-28 16:38:40.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 3 CORRECT 6 "d" Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 16:38:40.0 US/Eastern DELETION ELEC* ELEC6A 6 Delete Joint Explanation Experimental S0723 S0723-Feb28-15-09-52 2007-02-28 16:38:47.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC6A Answer-1 1 CORRECT Answer-1 "1.02 m" Joint Explanation Experimental 84 S0724 S0724-Feb28-15-05-58 2007-02-28 15:14:31.0 US/Eastern DELETION FOR* FOR4C Axes-1 Delete label=NIL Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:15:28.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 1 CORRECT Axes-2 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 15 S0724 S0724-Feb28-15-05-58 2007-02-28 15:16:26.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 CORRECT Vector-3 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=69 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:17:29.0 US/Eastern ATTEMPT Variable RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 INCORRECT Var-4 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6" Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE 13 (= Q_PARTICLE (- 7.900000000000001e-6)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:17:47.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 CORRECT Var-4 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Joint Explanation Experimental DEFINE-CHARGE 21 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0724 S0724-Feb28-15-05-58 2007-02-28 15:19:29.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 INCORRECT Vector-5 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=1;mag=41 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:19:35.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT Vector-5 label=F Do you really want the direction of that vector to be 1 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:19:41.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 HINT Think about how the direction of the electric force on the particle due to an unspecified agent is related to the direction of the electric field vector. 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:20:45.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 4 INCORRECT Vector-5 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=20;mag=41 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 20 S0724 S0724-Feb28-15-05-58 2007-02-28 15:20:52.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (BODY PARTICLE TIME NIL) 1 HINT Vector-5 label=F Do you really want the direction of that vector to be 20 degrees? 1 Joint Explanation Experimental DRAW-BODY S0724 S0724-Feb28-15-05-58 2007-02-28 15:21:26.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (BODY PARTICLE TIME NIL) 2 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Joint Explanation Experimental DRAW-BODY S0724 S0724-Feb28-15-05-58 2007-02-28 15:22:02.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 3 CORRECT System-6 label="q";body=particle;time=NIL Joint Explanation Experimental DRAW-BODY 30 S0724 S0724-Feb28-15-05-58 2007-02-28 15:22:10.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 5 HINT Vector-5 label=F Do you really want the direction of that vector to be 20 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:22:22.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 6 INCORRECT Vector-5 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=41 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:22:22.0 US/Eastern DELETION FOR* FOR4C Vector-5 Delete label=F Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:22:52.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 7 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=58 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:22:58.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 8 HINT Vector-7 label=F Do you really want the direction of that vector to be 22 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:23:14.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 9 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=-22;mag=58 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:23:23.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 10 INCORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=204;mag=77 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 29 S0724 S0724-Feb28-15-05-58 2007-02-28 15:23:27.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 11 HINT Vector-7 label=F Do you really want the direction of that vector to be 204 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:23:48.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 12 CORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=77 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 30 S0724 S0724-Feb28-15-05-58 2007-02-28 15:24:01.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 1 INCORRECT 0 "F = E*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 29 (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:24:19.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 2 CORRECT 0 "F_x = E_x*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 65 (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Xc_E_REGION_UNSPECIFIED_0 Q_PARTICLE)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:24:26.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 1 CORRECT 1 "F_y = E_y * q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Yc_E_REGION_UNSPECIFIED_0 Q_PARTICLE)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:24:43.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (SQRT (+ (^ Yc_Fe_PARTICLE_UNSPECIFIED_1_0 2) (^ Xc_Fe_PARTICLE_UNSPECIFIED_1_0 2))))) 1 INCORRECT 2 "F = (F_x + F_y)^.5" Units are inconsistent. 1 1 Joint Explanation Experimental WRITE-VECTOR-MAGNITUDE (= Fe_PARTICLE_UNSPECIFIED_1 (^ (+ Xc_Fe_PARTICLE_UNSPECIFIED_1_0 Yc_Fe_PARTICLE_UNSPECIFIED_1_0) 0.5)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:25:14.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (SQRT (+ (^ Yc_Fe_PARTICLE_UNSPECIFIED_1_0 2) (^ Xc_Fe_PARTICLE_UNSPECIFIED_1_0 2))))) 2 CORRECT 2 "F = (F_x ^2+ F_y^2)^.5" Joint Explanation Experimental WRITE-VECTOR-MAGNITUDE (= Fe_PARTICLE_UNSPECIFIED_1 (^ (+ (^ Xc_Fe_PARTICLE_UNSPECIFIED_1_0 2) (^ Yc_Fe_PARTICLE_UNSPECIFIED_1_0 2)) 0.5)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:25:27.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 INCORRECT 3 "F" Unable to solve for F. One thing you probably need is an equation specifying the given value of E. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:26:00.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 3 "E = 14.3e3N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 73 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:26:12.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 2 INCORRECT 4 "F" Unable to solve for F. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:26:25.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 3 INCORRECT 4 "F_x" Unable to solve for F_x. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:26:48.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 3 INCORRECT 0 "F_x = E_x/q" Units are inconsistent. 1 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 72 (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (/ Xc_E_REGION_UNSPECIFIED_0 Q_PARTICLE)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:27:00.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 4 CORRECT 0 "F_x = E_x*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 73 (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Xc_E_REGION_UNSPECIFIED_0 Q_PARTICLE)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:27:02.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 2 CORRECT 1 "F_y = E_y * q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Yc_E_REGION_UNSPECIFIED_0 Q_PARTICLE)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:27:02.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (SQRT (+ (^ Yc_Fe_PARTICLE_UNSPECIFIED_1_0 2) (^ Xc_Fe_PARTICLE_UNSPECIFIED_1_0 2))))) 3 CORRECT 2 "F = (F_x ^2+ F_y^2)^.5" Joint Explanation Experimental WRITE-VECTOR-MAGNITUDE (= Fe_PARTICLE_UNSPECIFIED_1 (^ (+ (^ Xc_Fe_PARTICLE_UNSPECIFIED_1_0 2) (^ Yc_Fe_PARTICLE_UNSPECIFIED_1_0 2)) 0.5)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:27:03.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 2 CORRECT 3 "E = 14.3e3N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:27:09.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 4 INCORRECT 4 "F" Unable to solve for F. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:27:26.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 5 HINT 0 Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO S0724 S0724-Feb28-15-05-58 2007-02-28 15:27:39.0 US/Eastern CANCEL FOR* FOR4C Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:27:48.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 6 CORRECT 4 "F_x = E_x*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Xc_E_REGION_UNSPECIFIED_0 Q_PARTICLE)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:27:52.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 3 CORRECT 5 "F_y = E_y * q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Yc_E_REGION_UNSPECIFIED_0 Q_PARTICLE)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:27:56.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (SQRT (+ (^ Yc_Fe_PARTICLE_UNSPECIFIED_1_0 2) (^ Xc_Fe_PARTICLE_UNSPECIFIED_1_0 2))))) 4 CORRECT 6 "F = (F_x ^2+ F_y^2)^.5" Joint Explanation Experimental WRITE-VECTOR-MAGNITUDE (= Fe_PARTICLE_UNSPECIFIED_1 (^ (+ (^ Xc_Fe_PARTICLE_UNSPECIFIED_1_0 2) (^ Yc_Fe_PARTICLE_UNSPECIFIED_1_0 2)) 0.5)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:28:01.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 5 INCORRECT 7 "F" Unable to solve for F. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:28:01.0 US/Eastern DELETION FOR* FOR4C 2 Delete Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:28:01.0 US/Eastern DELETION FOR* FOR4C 1 Delete Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:28:01.0 US/Eastern DELETION FOR* FOR4C 0 Delete Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:28:10.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 3 CORRECT 3 "E = 14.3e3N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:28:12.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 7 CORRECT 4 "F_x = E_x*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Xc_E_REGION_UNSPECIFIED_0 Q_PARTICLE)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:28:13.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 4 CORRECT 5 "F_y = E_y * q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Yc_E_REGION_UNSPECIFIED_0 Q_PARTICLE)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:28:13.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (SQRT (+ (^ Yc_Fe_PARTICLE_UNSPECIFIED_1_0 2) (^ Xc_Fe_PARTICLE_UNSPECIFIED_1_0 2))))) 5 CORRECT 6 "F = (F_x ^2+ F_y^2)^.5" Joint Explanation Experimental WRITE-VECTOR-MAGNITUDE (= Fe_PARTICLE_UNSPECIFIED_1 (^ (+ (^ Xc_Fe_PARTICLE_UNSPECIFIED_1_0 2) (^ Yc_Fe_PARTICLE_UNSPECIFIED_1_0 2)) 0.5)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:28:17.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 6 INCORRECT 0 "F" Unable to solve for F. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:29:10.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 INCORRECT 2 "F = ?" Syntax error in F = 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG ? S0724 S0724-Feb28-15-05-58 2007-02-28 15:29:37.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 2 INCORRECT 2 "E = F/q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= E_REGION_UNSPECIFIED (/ Fe_PARTICLE_UNSPECIFIED_1 Q_PARTICLE)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:29:40.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 3 INCORRECT 2 "E = F / q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= E_REGION_UNSPECIFIED (/ Fe_PARTICLE_UNSPECIFIED_1 Q_PARTICLE)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:30:00.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C CALC_REQUEST 7 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:30:00.0 US/Eastern DELETION FOR* FOR4C 2 Delete Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:30:04.0 US/Eastern CANCEL FOR* FOR4C Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:31:05.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 8 INCORRECT 0 "F_x" Unable to solve for F_x. Try the light-bulb if you need a hint about a step that still needs to be done. 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:31:14.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 9 INCORRECT 0 "E_x" Unable to solve for E_x. Try the light-bulb if you need a hint about a step that still needs to be done. 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:31:22.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 10 INCORRECT 0 "E_x" Unable to solve for E_x. Try the light-bulb if you need a hint about a step that still needs to be done. 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:31:27.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 11 INCORRECT 0 "E_x" Unable to solve for E_x. Try the light-bulb if you need a hint about a step that still needs to be done. 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:32:10.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 12 INCORRECT 0 "F" Unable to solve for F. Try the light-bulb if you need a hint about a step that still needs to be done. 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:32:39.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 1 CORRECT Vector-7 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=202;mag=77 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES S0724 S0724-Feb28-15-05-58 2007-02-28 15:32:44.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 13 INCORRECT 0 "F" Unable to solve for F. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:33:05.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 13 CORRECT Vector-7 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=77 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:33:15.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 CORRECT Vector-3 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=70 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:33:32.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 3 CORRECT Vector-3 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=70 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:34:03.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 4 CORRECT 3 "E = 14.3e3 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:34:07.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 14 INCORRECT 0 "F" Unable to solve for F. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:34:22.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 8 CORRECT 4 "E_x = F_x / q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Xc_E_REGION_UNSPECIFIED_0 (/ Xc_Fe_PARTICLE_UNSPECIFIED_1_0 Q_PARTICLE)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:34:29.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 15 INCORRECT 0 "F_x" Unable to solve for F_x. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:34:45.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 9 CORRECT 4 "F_x = E_x * q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Xc_E_REGION_UNSPECIFIED_0 Q_PARTICLE)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:37:08.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 1 CORRECT 0 "E_x = E* cos($qE)" Joint Explanation Experimental COMPO-GENERAL-CASE (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS OE_REGION_UNSPECIFIED))) S0724 S0724-Feb28-15-05-58 2007-02-28 15:37:08.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (IMPLICIT-EQN (= OE_REGION_UNSPECIFIED (DNUM 22 deg))) 1 CORRECT 0 "E_x = E* cos($qE)" Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS OE_REGION_UNSPECIFIED))) S0724 S0724-Feb28-15-05-58 2007-02-28 15:37:22.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 1 CORRECT 1 "E_y = E*sin($qE)" Joint Explanation Experimental COMPO-GENERAL-CASE (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN OE_REGION_UNSPECIFIED))) S0724 S0724-Feb28-15-05-58 2007-02-28 15:37:22.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (IMPLICIT-EQN (= OE_REGION_UNSPECIFIED (DNUM 22 deg))) 2 CORRECT 1 "E_y = E*sin($qE)" Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN OE_REGION_UNSPECIFIED))) S0724 S0724-Feb28-15-05-58 2007-02-28 15:37:30.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 16 CORRECT 2 "F" Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:37:49.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 "F = 0.11297000000000004 N" Joint Explanation Experimental 98 S0724 S0724-Feb28-15-05-58 2007-02-28 15:47:43.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="qe";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0724 S0724-Feb28-15-05-58 2007-02-28 15:47:52.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 2 INCORRECT System-668 label="me";body=earth;time=NIL Joint Explanation Experimental DRAW-BODY 12 S0724 S0724-Feb28-15-05-58 2007-02-28 15:47:58.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (BODY ELECTRON TIME NIL) 3 HINT System-668 label=me The closest matching CORRECT entry seems to be done already, so you really don't need to generate it again. If you want to anyway, click on Explain more. 1 Joint Explanation Experimental DRAW-BODY S0724 S0724-Feb28-15-05-58 2007-02-28 15:48:14.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 4 INCORRECT System-668 label="earth";body=earth;time=NIL Joint Explanation Experimental DRAW-BODY S0724 S0724-Feb28-15-05-58 2007-02-28 15:48:14.0 US/Eastern DELETION ELEC* ELEC1C System-668 Delete label=earth Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:48:40.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-669 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-COMPO-FORM-AXES 22 S0724 S0724-Feb28-15-05-58 2007-02-28 15:49:09.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-670 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 31 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0724 S0724-Feb28-15-05-58 2007-02-28 15:49:25.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-671 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 Kg" Joint Explanation Experimental DEFINE-MASS 38 (= m_ELECTRON (DNUM 9.11e-31 Kg)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:50:06.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 CORRECT Vector-672 label="Fmg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=73 Joint Explanation Experimental DRAW-WEIGHT 39 S0724 S0724-Feb28-15-05-58 2007-02-28 15:50:23.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 INCORRECT 0 "F = me*g" Undefined variable: F 1 Joint Explanation Experimental WT-LAW 38 S0724 S0724-Feb28-15-05-58 2007-02-28 15:50:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 2 CORRECT 0 "Fmg = me*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:51:02.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-673 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=90;mag=75 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:51:02.0 US/Eastern DELETION ELEC* ELEC1C Vector-673 Delete label=E Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:51:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-674 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=85 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:51:52.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 CORRECT 1 "Fe = Fmg" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0724 S0724-Feb28-15-05-58 2007-02-28 15:51:52.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 1 "Fe = Fmg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0724 S0724-Feb28-15-05-58 2007-02-28 15:51:52.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 1 "Fe = Fmg" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0724 S0724-Feb28-15-05-58 2007-02-28 15:51:52.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 1 "Fe = Fmg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0724 S0724-Feb28-15-05-58 2007-02-28 15:52:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 2 INCORRECT 1 "Fe = -Fmg" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Fe_ELECTRON_UNSPECIFIED_1 (- Fw_ELECTRON_EARTH_1)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:52:02.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 3 CORRECT 1 "Fe = Fmg" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0724 S0724-Feb28-15-05-58 2007-02-28 15:52:02.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 2 CORRECT 1 "Fe = Fmg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0724 S0724-Feb28-15-05-58 2007-02-28 15:52:02.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 2 CORRECT 1 "Fe = Fmg" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0724 S0724-Feb28-15-05-58 2007-02-28 15:52:02.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 2 CORRECT 1 "Fe = Fmg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0724 S0724-Feb28-15-05-58 2007-02-28 15:52:16.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 4 CORRECT 1 "Fe_y = Fmg" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 Fw_ELECTRON_EARTH_1) S0724 S0724-Feb28-15-05-58 2007-02-28 15:52:16.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 3 CORRECT 1 "Fe_y = Fmg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 Fw_ELECTRON_EARTH_1) S0724 S0724-Feb28-15-05-58 2007-02-28 15:52:16.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 3 CORRECT 1 "Fe_y = Fmg" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 Fw_ELECTRON_EARTH_1) S0724 S0724-Feb28-15-05-58 2007-02-28 15:52:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 5 CORRECT 1 "Fe = Fmg" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0724 S0724-Feb28-15-05-58 2007-02-28 15:52:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 4 CORRECT 1 "Fe = Fmg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0724 S0724-Feb28-15-05-58 2007-02-28 15:52:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 4 CORRECT 1 "Fe = Fmg" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0724 S0724-Feb28-15-05-58 2007-02-28 15:52:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 3 CORRECT 1 "Fe = Fmg" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_1 Fw_ELECTRON_EARTH_1) S0724 S0724-Feb28-15-05-58 2007-02-28 15:52:40.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 INCORRECT 2 "E = abs(q)*Fe" Undefined variables: (E q) 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:52:40.0 US/Eastern DELETION ELEC* ELEC1C Vector-675 Delete label=NIL Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:53:23.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 INCORRECT Vector-676 label="E";type=E-field;body=region;agent=electron;time=NIL;dir=270;mag=96 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:53:25.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 INCORRECT 2 "E = abs(qe)*Fe" The variable E is not used in any solution I know of. 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:53:38.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 HINT Vector-676 label=E Is the electron the source of the electric field you are defining? 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:53:48.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 6 CORRECT Vector-676 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=96 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 15:53:50.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 INCORRECT 2 "E = abs(qe)*Fe" Units are inconsistent. 1 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= E_REGION_UNSPECIFIED (* (ABS Q_ELECTRON) Fe_ELECTRON_UNSPECIFIED_1)) S0724 S0724-Feb28-15-05-58 2007-02-28 15:54:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 CORRECT 2 "E = Fe / abs(qe)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 73 (= E_REGION_UNSPECIFIED (/ Fe_ELECTRON_UNSPECIFIED_1 (ABS Q_ELECTRON))) S0724 S0724-Feb28-15-05-58 2007-02-28 15:54:24.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 CORRECT 3 "E" Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 15:54:41.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 CORRECT Answer-1 "5.58e-11 N/C" Joint Explanation Experimental 98 S0724 S0724-Feb28-15-05-58 2007-02-28 16:05:02.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 CORRECT System-1 label="q";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0724 S0724-Feb28-15-05-58 2007-02-28 16:05:25.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-2 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=92 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 16:05:38.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 INCORRECT 0 "E = 2e4 N/c" Undefined variable: c 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 13 S0724 S0724-Feb28-15-05-58 2007-02-28 16:05:42.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 2 CORRECT 0 "E = 2e4 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 18 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:05:55.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT 1 "q = -1.6e-19 C" Undefined variable: q 1 Joint Explanation Experimental DEFINE-CHARGE 17 S0724 S0724-Feb28-15-05-58 2007-02-28 16:05:55.0 US/Eastern DELETION ELEC* ELEC3A 1 Delete Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:06:13.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-3 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.6e-19 C" Joint Explanation Experimental DEFINE-CHARGE 20 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0724 S0724-Feb28-15-05-58 2007-02-28 16:08:00.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-4 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=37 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 21 S0724 S0724-Feb28-15-05-58 2007-02-28 16:08:53.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-5 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T1;dir=90;mag=35 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP 20 S0724 S0724-Feb28-15-05-58 2007-02-28 16:08:57.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 HINT Vector-5 label=a You don't need to draw the accel at T1. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG S0724 S0724-Feb28-15-05-58 2007-02-28 16:09:28.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 2 INCORRECT 1 "E = F / q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= E_REGION_PLATES (/ Fe_ELECTRON_PLATES_12 Q_ELECTRON)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:09:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 3 CORRECT 1 "E = F / abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 32 (= E_REGION_PLATES (/ Fe_ELECTRON_PLATES_12 (ABS Q_ELECTRON))) S0724 S0724-Feb28-15-05-58 2007-02-28 16:09:46.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT 2 "F = m*a" The variable a is not used in any solution I know of. 1 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0724 S0724-Feb28-15-05-58 2007-02-28 16:09:56.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT Vector-5 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T1;dir=90;mag=35 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP 31 S0724 S0724-Feb28-15-05-58 2007-02-28 16:10:23.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 INCORRECT 2 "E = F* abs(v)" Undefined variable: v 1 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0724 S0724-Feb28-15-05-58 2007-02-28 16:10:23.0 US/Eastern DELETION ELEC* ELEC3A Vector-5 Delete label=a Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:10:43.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 CORRECT Vector-6 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=56 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT 32 S0724 S0724-Feb28-15-05-58 2007-02-28 16:10:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 INCORRECT 2 "E = F* abs(v)" Units are inconsistent. 1 1 Joint Explanation Experimental DEFINE-MASS 31 (= E_REGION_PLATES (* Fe_ELECTRON_PLATES_12 (ABS v_ELECTRON_2))) S0724 S0724-Feb28-15-05-58 2007-02-28 16:11:04.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 2 INCORRECT 2 "E = F * v" Units are inconsistent. 1 1 Joint Explanation Experimental DEFINE-MASS (= E_REGION_PLATES (* Fe_ELECTRON_PLATES_12 v_ELECTRON_2)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:13:10.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 3 CORRECT Var-7 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 Kg" Joint Explanation Experimental DEFINE-MASS 35 (= m_ELECTRON (DNUM 9.11e-31 Kg)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:13:15.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A CALC_REQUEST 1 INCORRECT 2 "E = m * v /q" Units are inconsistent. 1 1 Joint Explanation Experimental (= E_REGION_PLATES (/ (* m_ELECTRON v_ELECTRON_2) Q_ELECTRON)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:13:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A CALC_REQUEST 2 INCORRECT 2 "E = m * v /abs(q)" Units are inconsistent. 1 1 Joint Explanation Experimental (= E_REGION_PLATES (/ (* m_ELECTRON v_ELECTRON_2) (ABS Q_ELECTRON))) S0724 S0724-Feb28-15-05-58 2007-02-28 16:14:01.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A CALC_REQUEST 3 INCORRECT 2 "E = m * v /abs(q) /t" Undefined variable: t 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:14:09.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A CALC_REQUEST 4 INCORRECT 2 "E = m * v /abs(q) /t1" Undefined variable: t1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:14:24.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A CALC_REQUEST 5 INCORRECT 2 "E = m * v /abs(q) /T1" Undefined variable: T1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:14:35.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A CALC_REQUEST 6 HINT Var-4 label=se Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:15:03.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 7 INCORRECT 3 "T1" Unable to solve for T1. One thing you probably need is an equation specifying the given value of the magnitude of the displacement of the electron from T0 to T1. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:16:00.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT 3 "1.5 = .5* abs(F) / m * T1" Undefined variable: T1 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0724 S0724-Feb28-15-05-58 2007-02-28 16:16:00.0 US/Eastern DELETION ELEC* ELEC3A 2 Delete Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:17:04.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT 3 "1.5 = .5* abs(F) / m * T1^2" Undefined variable: T1 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 34 S0724 S0724-Feb28-15-05-58 2007-02-28 16:17:42.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT 3 "v^2 = 2 *1.5*abs(F) / m" Units are inconsistent. 1 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT (= (^ v_ELECTRON_2 2) (/ (* (* 2 1.5) (ABS Fe_ELECTRON_PLATES_12)) m_ELECTRON)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:18:41.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 INCORRECT 3 "v^2 = 2 * 1.5 * abs(F) / m" Units are inconsistent. 1 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT (= (^ v_ELECTRON_2 2) (/ (* (* 2 1.5) (ABS Fe_ELECTRON_PLATES_12)) m_ELECTRON)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:19:26.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 INCORRECT Var-8 label="d";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.5 cm" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0724 S0724-Feb28-15-05-58 2007-02-28 16:19:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 INCORRECT 3 "v^2 = 2 * d * abs(F) / m" The variable d is not used in any solution I know of. 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0724 S0724-Feb28-15-05-58 2007-02-28 16:19:34.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 HINT Var-7 label=s I can only recognize equations and variables from solutions I know about. This variable is not used in any of the solutions I have recorded for this problem. It's possible you are pursuing a solution that I don't know about, but if so, I can't help you with it and simpler solutions are probably available. 2 2 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0724 S0724-Feb28-15-05-58 2007-02-28 16:19:57.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 INCORRECT Var-8 label="d";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value=".015 m" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0724 S0724-Feb28-15-05-58 2007-02-28 16:20:01.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 INCORRECT 3 "v^2 = 2 * d * abs(F) / m" The variable d is not used in any solution I know of. 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0724 S0724-Feb28-15-05-58 2007-02-28 16:20:11.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 10 INCORRECT Var-8 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value=".015 m" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0724 S0724-Feb28-15-05-58 2007-02-28 16:20:13.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 1 INCORRECT 3 "v^2 = 2 * s * abs(F) / m" The variable s is not used in any solution I know of. 1 Joint Explanation Experimental DEFINE-DURATION S0724 S0724-Feb28-15-05-58 2007-02-28 16:20:13.0 US/Eastern DELETION ELEC* ELEC3A 3 Delete Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:22:18.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 2 INCORRECT 2 "Ff = m * a" Undefined variables: (Ff a) 1 Joint Explanation Experimental DEFINE-DURATION S0724 S0724-Feb28-15-05-58 2007-02-28 16:22:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 3 INCORRECT 2 "F = m * v / T1" Undefined variable: T1 1 Joint Explanation Experimental DEFINE-DURATION S0724 S0724-Feb28-15-05-58 2007-02-28 16:23:06.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 4 CORRECT Var-9 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Joint Explanation Experimental DEFINE-DURATION S0724 S0724-Feb28-15-05-58 2007-02-28 16:23:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 1 CORRECT 2 "F = m * v / t" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 41 (= Fe_ELECTRON_PLATES_12 (/ (* m_ELECTRON v_ELECTRON_2) t_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:23:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 1 CORRECT 2 "F = m * v / t" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NSL-COMPO 41 (= Fe_ELECTRON_PLATES_12 (/ (* m_ELECTRON v_ELECTRON_2) t_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:23:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_1_0 0)) 1 CORRECT 2 "F = m * v / t" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-ZERO-VECTOR 41 (= Fe_ELECTRON_PLATES_12 (/ (* m_ELECTRON v_ELECTRON_2) t_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:23:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 1 CORRECT 2 "F = m * v / t" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-LK-NO-S-COMPO 41 (= Fe_ELECTRON_PLATES_12 (/ (* m_ELECTRON v_ELECTRON_2) t_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:23:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 1 CORRECT 2 "F = m * v / t" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 41 (= Fe_ELECTRON_PLATES_12 (/ (* m_ELECTRON v_ELECTRON_2) t_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:23:27.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT It is good practice to identify the fundamental principles you are using by writing them purely symbolically in standard form before combining them with other equations or given values. Select "Review Physics Equations" on the Help Menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0724 S0724-Feb28-15-05-58 2007-02-28 16:24:03.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 INCORRECT Vector-10 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T1;dir=90;mag=33 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0724 S0724-Feb28-15-05-58 2007-02-28 16:24:14.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 CORRECT Vector-10 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=33 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP S0724 S0724-Feb28-15-05-58 2007-02-28 16:24:20.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 2 "F = m * a" Joint Explanation Experimental 34 (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:24:35.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 8 CORRECT 3 "a" Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:24:52.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A CALC_REQUEST 9 INCORRECT 3 "s = .5 * a * t" The variable s is not used in any solution I know of. 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:24:52.0 US/Eastern DELETION ELEC* ELEC3A 3 Delete Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:24:52.0 US/Eastern DELETION ELEC* ELEC3A Var-8 Delete label=s Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:25:28.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 10 INCORRECT 3 "t" Unable to solve for t. One thing you probably need is an equation specifying the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:26:07.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 11 CORRECT Vector-11 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=47 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0724 S0724-Feb28-15-05-58 2007-02-28 16:26:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 3 "d = .015 m" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 38 (= s_ELECTRON_12 (DNUM 0.015 m)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:26:39.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 2 INCORRECT 4 "d = .5 * a * t" The units in this equation are not consistent. If this is a symbolic equation, there is probably an error: check all your terms. Another possibility is that a number has been used without correct associated units. 1 1 Joint Explanation Experimental (= s_ELECTRON_12 (* (* 0.5 a_ELECTRON_12) t_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:26:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 3 TRUE_BUT_IRRELEVANT 4 "d = .5 * a * t^2" Joint Explanation Experimental (= s_ELECTRON_12 (* (* 0.5 a_ELECTRON_12) (^ t_12 2))) S0724 S0724-Feb28-15-05-58 2007-02-28 16:27:04.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A No Intepretation 4 INCORRECT 5 "v = a / t" Units are inconsistent. 1 1 Joint Explanation Experimental (= v_ELECTRON_2 (/ a_ELECTRON_12 t_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:27:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 5 TRUE_BUT_IRRELEVANT 5 "v = a * t" Joint Explanation Experimental (= v_ELECTRON_2 (* a_ELECTRON_12 t_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:27:17.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 11 CORRECT 6 "v" Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:27:35.0 US/Eastern ATTEMPT Answer RESULT Unsolicited ELEC* ELEC3A Answer-1 1 INCORRECT Answer-1 "1.03e+7 m//s" Syntax error in v=1.03e+7 m//s 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:27:41.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 2 CORRECT Answer-1 "1.03e+7 m/s" Joint Explanation Experimental 61 S0724 S0724-Feb28-15-05-58 2007-02-28 16:39:39.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="q";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 S0724 S0724-Feb28-15-05-58 2007-02-28 16:39:49.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 25 S0724 S0724-Feb28-15-05-58 2007-02-28 16:40:13.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-669 label="Fw";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=75 Joint Explanation Experimental DRAW-WEIGHT S0724 S0724-Feb28-15-05-58 2007-02-28 16:40:32.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-670 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=81 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 16:40:49.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-671 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=64 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 16:41:11.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-672 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=61 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT S0724 S0724-Feb28-15-05-58 2007-02-28 16:41:30.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-673 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.6e-19 C" Joint Explanation Experimental DEFINE-CHARGE 29 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0724 S0724-Feb28-15-05-58 2007-02-28 16:41:48.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-674 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 Kg" Joint Explanation Experimental DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 Kg)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:42:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 0 "E = 4e-12 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 36 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:42:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 1 "vi_y = 4.3 m/s" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 40 (= Yc_v_ELECTRON_1_0 (DNUM 4.3 m/s)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:42:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 CORRECT 1 "vi_y = 4.3 m/s" Joint Explanation Experimental COMPO-PARALLEL-AXIS 40 (= Yc_v_ELECTRON_1_0 (DNUM 4.3 m/s)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:43:21.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 INCORRECT 2 "vf_y ^2= vi_y^2 + 2 * d * a" Undefined variables: (vf_y d a) 1 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0724 S0724-Feb28-15-05-58 2007-02-28 16:44:16.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 2 INCORRECT Vector-675 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=25 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST 39 S0724 S0724-Feb28-15-05-58 2007-02-28 16:44:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 1 CORRECT 3 "vf_y = 0" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Yc_v_ELECTRON_2_0 0) S0724 S0724-Feb28-15-05-58 2007-02-28 16:44:37.0 US/Eastern DELETION ELEC* ELEC6A Vector-676 Delete label=NIL Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:44:37.0 US/Eastern DELETION ELEC* ELEC6A Vector-675 Delete label=vf Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:45:09.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 3 CORRECT Vector-677 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST S0724 S0724-Feb28-15-05-58 2007-02-28 16:45:09.0 US/Eastern DELETION ELEC* ELEC6A 3 Delete Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:45:46.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-678 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=46 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN S0724 S0724-Feb28-15-05-58 2007-02-28 16:46:12.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-679 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0724 S0724-Feb28-15-05-58 2007-02-28 16:46:17.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Var-679 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0724 S0724-Feb28-15-05-58 2007-02-28 16:46:17.0 US/Eastern DELETION ELEC* ELEC6A Var-679 Delete label=s Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:46:46.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 CORRECT Vector-680 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=61 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT S0724 S0724-Feb28-15-05-58 2007-02-28 16:46:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 INCORRECT 2 "vf_y ^2= vi_y^2 + 2 * d * a" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ Yc_v_ELECTRON_2_0 2) (+ (^ Yc_v_ELECTRON_1_0 2) (* (* 2 s_ELECTRON_12) a_ELECTRON_12))) S0724 S0724-Feb28-15-05-58 2007-02-28 16:46:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 2 INCORRECT 2 "vf_y ^2= vi_y^2 + 2 * d * a" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ Yc_v_ELECTRON_2_0 2) (+ (^ Yc_v_ELECTRON_1_0 2) (* (* 2 s_ELECTRON_12) a_ELECTRON_12))) S0724 S0724-Feb28-15-05-58 2007-02-28 16:47:05.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 3 HINT 2 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO S0724 S0724-Feb28-15-05-58 2007-02-28 16:47:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 4 CORRECT 2 "vf_y ^2= vi_y^2 + 2 * d * a_y" Although equation 3 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO 45 (= (^ Yc_v_ELECTRON_2_0 2) (+ (^ Yc_v_ELECTRON_1_0 2) (* (* 2 s_ELECTRON_12) Yc_a_ELECTRON_12_0))) S0724 S0724-Feb28-15-05-58 2007-02-28 16:47:32.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 CORRECT 2 "vf_y ^2= vi_y^2 + 2 * d * a_y" Although equation 3 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 45 (= (^ Yc_v_ELECTRON_2_0 2) (+ (^ Yc_v_ELECTRON_1_0 2) (* (* 2 s_ELECTRON_12) Yc_a_ELECTRON_12_0))) S0724 S0724-Feb28-15-05-58 2007-02-28 16:47:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 5 CORRECT 2 "vf_y ^2= vi_y^2 + 2 * d_y * a_y" Joint Explanation Experimental WRITE-LK-NO-T-COMPO 50 (= (^ Yc_v_ELECTRON_2_0 2) (+ (^ Yc_v_ELECTRON_1_0 2) (* (* 2 Yc_s_ELECTRON_12_0) Yc_a_ELECTRON_12_0))) S0724 S0724-Feb28-15-05-58 2007-02-28 16:48:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 INCORRECT 3 "m* a = F_y - Fw_y" Joint Explanation Experimental WRITE-NSL-COMPO (= (* m_ELECTRON a_ELECTRON_12) (- Yc_Fe_ELECTRON_UNSPECIFIED_12_0 Yc_Fw_ELECTRON_EARTH_12_0)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:48:34.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 2 INCORRECT 3 "m * a_y = F_y - Fw_y" Joint Explanation Experimental WRITE-NSL-COMPO (= (* m_ELECTRON Yc_a_ELECTRON_12_0) (- Yc_Fe_ELECTRON_UNSPECIFIED_12_0 Yc_Fw_ELECTRON_EARTH_12_0)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:49:06.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 3 CORRECT 3 "Fw = m*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:49:22.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-671 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=64 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0724 S0724-Feb28-15-05-58 2007-02-28 16:49:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 4 "E = Fe / abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 62 (= E_REGION_UNSPECIFIED (/ Fe_ELECTRON_UNSPECIFIED_12 (ABS Q_ELECTRON))) S0724 S0724-Feb28-15-05-58 2007-02-28 16:50:22.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-681 label="F";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=270;mag=66 Joint Explanation Experimental DRAW-NET-FORCE-FROM-ACCEL S0724 S0724-Feb28-15-05-58 2007-02-28 16:50:34.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 1 INCORRECT 5 "F = Fe- Fw" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:50:34.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 2 INCORRECT 5 "F = Fe- Fw" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:50:34.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 3 INCORRECT 5 "F = Fe- Fw" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:50:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 4 INCORRECT 5 "F = Fe - Fw" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:50:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 5 INCORRECT 5 "F = Fe - Fw" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:50:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 6 INCORRECT 5 "F = Fe - Fw" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:50:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 7 INCORRECT 5 "F = Fe + Fw" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (+ Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:50:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 8 INCORRECT 5 "F_y = Fe + Fw" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_Fnet_ELECTRON_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:50:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 9 INCORRECT 5 "F_y = Fe + Fw" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_Fnet_ELECTRON_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:50:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 10 INCORRECT 5 "F_y = Fe + Fw" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Yc_Fnet_ELECTRON_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:51:04.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 11 CORRECT 5 "F_y = Fe_y + Fw_y" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Yc_Fnet_ELECTRON_12_0 (+ Yc_Fe_ELECTRON_UNSPECIFIED_12_0 Yc_Fw_ELECTRON_EARTH_12_0)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:51:18.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0))) 1 CORRECT 6 "F_y = m * a_y" Joint Explanation Experimental WRITE-NSL-NET-COMPO 73 (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:51:29.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 1 INCORRECT 7 "d" Unable to solve for d. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:51:37.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 2 INCORRECT 7 "d_y" Unable to solve for d_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:52:08.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 3 INCORRECT 7 "a_y" Unable to solve for a_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:52:17.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 4 INCORRECT 7 "F" Unable to solve for F. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:52:24.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 5 INCORRECT 7 "F_y" Unable to solve for F_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:52:36.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 1 INCORRECT 7 "F = Fe + Fw" Joint Explanation Experimental (= Fnet_ELECTRON_12 (+ Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:52:41.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 2 TRUE_BUT_IRRELEVANT 7 "F = Fw - Fe" Joint Explanation Experimental (= Fnet_ELECTRON_12 (- Fw_ELECTRON_EARTH_12 Fe_ELECTRON_UNSPECIFIED_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:52:46.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 6 INCORRECT 8 "d_y" Unable to solve for d_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:52:51.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 7 CORRECT 8 "F" Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:52:57.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 8 INCORRECT 9 "F_y" Unable to solve for F_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:53:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0))) 2 INCORRECT 9 "F_y = abs(F)" Joint Explanation Experimental (= Yc_Fnet_ELECTRON_12_0 (ABS Fnet_ELECTRON_12)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:54:10.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 9 INCORRECT 9 "Fe_y" Unable to solve for Fe_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:54:10.0 US/Eastern DELETION ELEC* ELEC6A 9 Delete Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:55:03.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0))) 3 INCORRECT 9 "F_y = F * sin(90)" Joint Explanation Experimental WRITE-NSL-NET-COMPO (= Yc_Fnet_ELECTRON_12_0 (* Fnet_ELECTRON_12 (SIN 90))) S0724 S0724-Feb28-15-05-58 2007-02-28 16:55:22.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC6A (EQN (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0))) 4 HINT 11 Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental WRITE-NSL-NET-COMPO S0724 S0724-Feb28-15-05-58 2007-02-28 16:55:22.0 US/Eastern DELETION ELEC* ELEC6A 9 Delete Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:55:27.0 US/Eastern CANCEL ELEC* ELEC6A Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:56:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0))) 5 CORRECT 9 "F_y = m* a_y" Joint Explanation Experimental WRITE-NSL-NET-COMPO (= Yc_Fnet_ELECTRON_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:56:37.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 10 INCORRECT 10 "a_y" Unable to solve for a_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:56:54.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 1 CORRECT 10 "vf = 0" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= v_ELECTRON_2 0) S0724 S0724-Feb28-15-05-58 2007-02-28 16:57:00.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 11 INCORRECT 11 "a_y" Unable to solve for a_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:57:50.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 1 INCORRECT 11 "vf^2 = vi^2 + 2 * d * a" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 s_ELECTRON_12) a_ELECTRON_12))) S0724 S0724-Feb28-15-05-58 2007-02-28 16:57:50.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 2 INCORRECT 11 "vf^2 = vi^2 + 2 * d * a" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 s_ELECTRON_12) a_ELECTRON_12))) S0724 S0724-Feb28-15-05-58 2007-02-28 16:57:50.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 3 INCORRECT 11 "vf^2 = vi^2 + 2 * d * a" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 s_ELECTRON_12) a_ELECTRON_12))) S0724 S0724-Feb28-15-05-58 2007-02-28 16:58:02.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 4 INCORRECT 11 "E = E_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED Yc_E_REGION_UNSPECIFIED_0) S0724 S0724-Feb28-15-05-58 2007-02-28 16:58:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 5 CORRECT 11 "E = -E_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (- Yc_E_REGION_UNSPECIFIED_0)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:58:13.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 12 INCORRECT 12 "F_y" Unable to solve for F_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:58:48.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 1 CORRECT 12 "Fe = Fe_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fe_ELECTRON_UNSPECIFIED_12 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) S0724 S0724-Feb28-15-05-58 2007-02-28 16:58:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 1 INCORRECT 13 "Fw = Fw_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_12 Yc_Fw_ELECTRON_EARTH_12_0) S0724 S0724-Feb28-15-05-58 2007-02-28 16:59:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 2 CORRECT 13 "Fw = -Fw_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_12 (- Yc_Fw_ELECTRON_EARTH_12_0)) S0724 S0724-Feb28-15-05-58 2007-02-28 16:59:05.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 13 CORRECT 14 "F_y" Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:59:10.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 14 CORRECT 15 "d_y" Joint Explanation Experimental S0724 S0724-Feb28-15-05-58 2007-02-28 16:59:17.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC6A Answer-1 1 CORRECT Answer-1 "1.02 m" Joint Explanation Experimental 98 S0725 S0725-Mar01-13-10-01 2007-03-01 13:20:05.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 INCORRECT Var-1 label="I";quant=current;subtype=through;body=(particle);agent=NIL;time=NIL;value="-7.9e-6 C" Self-explanation Control DEFINE-CHARGE S0725 S0725-Mar01-13-10-01 2007-03-01 13:20:10.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 HINT Var-1 label=I Although you can always define a current-thru variable, none are needed for any solution I know of this problem. 1 Self-explanation Control DEFINE-CHARGE S0725 S0725-Mar01-13-10-01 2007-03-01 13:20:24.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 3 HINT Click on the light bulb button or 'explain further' for suggestions on how to solve this problem. 2 Self-explanation Control DEFINE-CHARGE S0725 S0725-Mar01-13-10-01 2007-03-01 13:21:00.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 4 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 3 Self-explanation Control DEFINE-CHARGE S0725 S0725-Mar01-13-10-01 2007-03-01 13:23:30.0 US/Eastern ATTEMPT Variable RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 5 INCORRECT Var-2 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 N/C" Units are inconsistent. 1 1 Self-explanation Control DEFINE-CHARGE (= Q_PARTICLE (- (DNUM 7.900000000000001e-6 N/C))) S0725 S0725-Mar01-13-10-01 2007-03-01 13:23:58.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 6 CORRECT Var-2 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6C" Self-explanation Control DEFINE-CHARGE 9 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) S0725 S0725-Mar01-13-10-01 2007-03-01 13:25:06.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 1 CORRECT Axes-3 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 20 S0725 S0725-Mar01-13-10-01 2007-03-01 13:25:45.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 INCORRECT Vector-4 label="E";type=E-field;body=region;agent=particle;time=NIL;dir=22;mag=115 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 13:25:52.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 HINT Vector-4 label=E Is the particle the source of the electric field you are defining? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 13:26:00.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 3 HINT A better choice (but maybe not the only one) would be the field due to an unspecified agent, not the particle 2 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR 15 S0725 S0725-Mar01-13-10-01 2007-03-01 13:26:16.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 4 CORRECT Vector-4 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=116 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 13:26:58.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 1 INCORRECT 1 "F_x = q*E_x" Undefined variable: F_x 1 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0725 S0725-Mar01-13-10-01 2007-03-01 13:27:08.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 2 HINT Vector-7 label=F Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0725 S0725-Mar01-13-10-01 2007-03-01 13:28:55.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 3 INCORRECT Vector-5 label="F";type=Force;body=particle;agent=particle;forcetype=Electric;time=T0;dir=22;mag=114 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES 14 S0725 S0725-Mar01-13-10-01 2007-03-01 13:28:59.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 4 HINT Vector-5 label=F A force arise from the interaction of two DIFFERENT objects, but you have used the particle for both. 1 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0725 S0725-Mar01-13-10-01 2007-03-01 13:29:04.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 5 HINT If you were trying to draw the net force on the particle, then double click on this force and look carefully at the dialog box. There is a button for defining the net force. 2 2 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES 9 S0725 S0725-Mar01-13-10-01 2007-03-01 13:29:57.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 6 INCORRECT Vector-5 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=22;mag=114 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0725 S0725-Mar01-13-10-01 2007-03-01 13:30:01.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 7 HINT Vector-5 label=F Do you really want the direction of that vector to be 22 degrees? 1 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0725 S0725-Mar01-13-10-01 2007-03-01 13:30:04.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 8 HINT Since the forces acting on the particle at T0 are all pointing in the same direction, the direction of the total force is known. 2 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES S0725 S0725-Mar01-13-10-01 2007-03-01 13:30:34.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 9 HINT Draw a non-zero net force vector for the particle at T0 at 202 degrees. 3 3 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES 4 S0725 S0725-Mar01-13-10-01 2007-03-01 13:31:01.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 10 CORRECT Vector-5 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=202;mag=114 Self-explanation Control DRAW-NET-FORCE-FROM-FORCES 5 S0725 S0725-Mar01-13-10-01 2007-03-01 13:31:12.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 HINT 1 Undefined variable: F_x 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 13:32:08.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 CORRECT Vector-5 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=114 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 13:32:14.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 1 CORRECT 1 "F_x = q*E_x" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO 40 (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0)) S0725 S0725-Mar01-13-10-01 2007-03-01 13:32:18.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 CORRECT 0 "F=abs(q)*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED)) S0725 S0725-Mar01-13-10-01 2007-03-01 13:32:34.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 1 INCORRECT 2 "F_y = q*E_x" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0)) S0725 S0725-Mar01-13-10-01 2007-03-01 13:32:36.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 2 CORRECT 2 "F_y = q*E_y" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0)) S0725 S0725-Mar01-13-10-01 2007-03-01 13:33:24.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 3 "E=14.3e+3 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 48 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) S0725 S0725-Mar01-13-10-01 2007-03-01 13:33:38.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 INCORRECT 4 "F_x" Unable to solve for F_x. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 13:34:13.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 2 CORRECT 4 "F" Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 13:34:20.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 "0.11297 N" Self-explanation Control 73 S0725 S0725-Mar01-13-10-01 2007-03-01 13:43:19.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-667 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-COMPO-FORM-AXES 15 S0725 S0725-Mar01-13-10-01 2007-03-01 13:44:01.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-668 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 25 S0725 S0725-Mar01-13-10-01 2007-03-01 13:45:59.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT 0 "Fe=mg" Undefined variables: (Fe mg) 1 Self-explanation Control DEFINE-CHARGE 23 S0725 S0725-Mar01-13-10-01 2007-03-01 13:46:46.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 INCORRECT Var-669 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.06e-19" Forgot to put units on a number. 1 Self-explanation Control DEFINE-CHARGE 22 (= Q_ELECTRON (- 1.0600000000000001e-19)) S0725 S0725-Mar01-13-10-01 2007-03-01 13:47:09.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 3 INCORRECT Var-669 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.06e-19 C" Self-explanation Control DEFINE-CHARGE (= Q_ELECTRON (- (DNUM 1.0600000000000001e-19 C))) S0725 S0725-Mar01-13-10-01 2007-03-01 13:47:14.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 4 HINT Var-669 label=qe - (1.0600000000000001e-19 C) is not the correct value for qe. Reread the problem statement carefully to find the given value for qe, the charge on the electron. 1 Self-explanation Control DEFINE-CHARGE S0725 S0725-Mar01-13-10-01 2007-03-01 13:47:37.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 5 CORRECT Var-669 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Self-explanation Control DEFINE-CHARGE 30 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0725 S0725-Mar01-13-10-01 2007-03-01 13:47:58.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-670 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 38 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0725 S0725-Mar01-13-10-01 2007-03-01 13:48:41.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT 0 "Fe=mg" Undefined variables: (Fe mg) 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 13:48:44.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 13:48:44.0 US/Eastern DELETION ELEC* ELEC1C Vector-671 Delete label=NIL Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 13:48:44.0 US/Eastern DELETION ELEC* ELEC1C Vector-672 Delete label=NIL Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 13:50:05.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 INCORRECT Vector-673 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=90;mag=75 Self-explanation Control DRAW-FIELD-GIVEN-DIR 37 S0725 S0725-Mar01-13-10-01 2007-03-01 13:50:09.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 HINT Vector-673 label=E Do you really want the direction of that vector to be 90 degrees? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 13:50:11.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 HINT You can determine the direction of the electric field at the region due to an unspecified agent from the problem statement 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 13:50:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 6 HINT Use the electric field drawing tool to draw the electric field at the region due to an unspecified agent in the given direction of 270 degrees. 3 3 Self-explanation Control DRAW-FIELD-GIVEN-DIR 32 S0725 S0725-Mar01-13-10-01 2007-03-01 13:50:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 7 CORRECT Vector-673 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=75 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 13:52:15.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 INCORRECT Vector-674 label="Fe";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-WEIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 13:52:18.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (DRAW-AXES 0) 2 HINT Vector-674 label=Fe Do you really want that vector to have a zero magnitude? 1 Self-explanation Control DRAW-COMPO-FORM-AXES S0725 S0725-Mar01-13-10-01 2007-03-01 13:52:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (DRAW-AXES 0) 3 HINT Notice that the electron is near the earth. 2 Self-explanation Control DRAW-WEIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 13:52:46.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 4 CORRECT Axes-667 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-COMPO-FORM-AXES S0725 S0725-Mar01-13-10-01 2007-03-01 13:52:46.0 US/Eastern DELETION ELEC* ELEC1C Axes-667 Delete label=NIL Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 13:53:02.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 5 CORRECT Axes-675 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-COMPO-FORM-AXES 33 S0725 S0725-Mar01-13-10-01 2007-03-01 13:53:16.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 2 INCORRECT Vector-674 label="Fe";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-WEIGHT 32 S0725 S0725-Mar01-13-10-01 2007-03-01 13:53:16.0 US/Eastern DELETION ELEC* ELEC1C Vector-674 Delete label=Fe Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 13:53:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 3 INCORRECT Vector-676 label="F";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=90;mag=45 Self-explanation Control DRAW-WEIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 13:53:44.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 4 HINT Vector-676 label=F Do you really want the direction of that vector to be 90 degrees? 1 Self-explanation Control DRAW-WEIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 13:54:00.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 5 CORRECT Vector-676 label="F";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=45 Self-explanation Control DRAW-WEIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 13:54:04.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 INCORRECT 0 "Fe=mg" Undefined variables: (Fe mg) 1 Self-explanation Control WT-LAW S0725 S0725-Mar01-13-10-01 2007-03-01 13:54:15.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 2 INCORRECT 0 "F=mg" Undefined variable: mg 1 Self-explanation Control WT-LAW S0725 S0725-Mar01-13-10-01 2007-03-01 13:54:29.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 3 INCORRECT 0 "F=meg" Undefined variable: meg 1 Self-explanation Control WT-LAW S0725 S0725-Mar01-13-10-01 2007-03-01 13:54:34.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 4 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control WT-LAW S0725 S0725-Mar01-13-10-01 2007-03-01 13:54:55.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 5 CORRECT 0 "F=(me)*g" Self-explanation Control WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) S0725 S0725-Mar01-13-10-01 2007-03-01 13:55:07.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 CORRECT 1 "F" Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 13:55:44.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 INCORRECT 2 "E= abs(qe)*F" Units are inconsistent. 1 1 Self-explanation Control COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (* (ABS Q_ELECTRON) Fw_ELECTRON_EARTH_1)) S0725 S0725-Mar01-13-10-01 2007-03-01 13:55:58.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 2 CORRECT 2 "F= abs(qe)*E" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control COMPO-PARALLEL-AXIS 52 (= Fw_ELECTRON_EARTH_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0725 S0725-Mar01-13-10-01 2007-03-01 13:55:58.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 1 CORRECT 2 "F= abs(qe)*E" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control WRITE-NFL-COMPO 52 (= Fw_ELECTRON_EARTH_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0725 S0725-Mar01-13-10-01 2007-03-01 13:55:58.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (* Q_ELECTRON Yc_E_REGION_UNSPECIFIED_0))) 1 CORRECT 2 "F= abs(qe)*E" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-COMPO 52 (= Fw_ELECTRON_EARTH_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0725 S0725-Mar01-13-10-01 2007-03-01 13:55:58.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (- E_REGION_UNSPECIFIED))) 1 CORRECT 2 "F= abs(qe)*E" Although equation 3 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Self-explanation Control COMPO-PARALLEL-AXIS 52 (= Fw_ELECTRON_EARTH_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0725 S0725-Mar01-13-10-01 2007-03-01 13:56:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C CALC_REQUEST 2 HINT It is good practice to identify the fundamental principles you are using by writing them purely symbolically in standard form before combining them with other equations or given values. Select "Review Physics Equations" on the Help Menu to view a list of principles and their standard forms. 2 Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 13:56:27.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C CALC_REQUEST 3 HINT A good solution would include Newton's second law and the definition of electric field, written as separate equations. 3 3 Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 13:57:09.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 4 CORRECT 3 "E" Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 13:57:21.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 CORRECT Answer-1 "5.579875000000001e-11 N/C" Self-explanation Control 77 S0725 S0725-Mar01-13-10-01 2007-03-01 14:09:14.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 1 CORRECT Axes-1 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 15 S0725 S0725-Mar01-13-10-01 2007-03-01 14:09:35.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 CORRECT System-2 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 25 S0725 S0725-Mar01-13-10-01 2007-03-01 14:09:59.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-3 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=55 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 14:10:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 0 "E= 2.00e+4 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 29 (= E_REGION_PLATES (DNUM 20000.0 N/C)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:11:20.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-4 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value=".015 m" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 28 S0725 S0725-Mar01-13-10-01 2007-03-01 14:11:24.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 HINT Var-4 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Self-explanation Control DEFINE-CHARGE S0725 S0725-Mar01-13-10-01 2007-03-01 14:11:34.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 2 Self-explanation Control DEFINE-CHARGE S0725 S0725-Mar01-13-10-01 2007-03-01 14:11:34.0 US/Eastern DELETION ELEC* ELEC3A Var-4 Delete label=s Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 14:13:43.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 3 INCORRECT Var-5 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19" Forgot to put units on a number. 1 Self-explanation Control DEFINE-CHARGE 27 (= Q_ELECTRON (- 1.5999999999999998e-19)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:13:59.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 4 CORRECT Var-5 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Self-explanation Control DEFINE-CHARGE 31 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0725 S0725-Mar01-13-10-01 2007-03-01 14:14:17.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-6 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 35 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:15:03.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Var-7 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="1.50 cm" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 14:15:05.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Var-7 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 14:15:10.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT How about using displacement instead of distance? Do you know any principles that involve displacement? 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 14:15:12.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT You should draw the displacement of the electron from T0 to T1. You can click on the light bulb button or 'explain further' for suggestions about how to solve the problem using it. 3 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 14:16:07.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 CORRECT Vector-8 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=60 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 14:16:07.0 US/Eastern DELETION ELEC* ELEC3A Var-7 Delete label=s Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 14:17:02.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 HINT You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN S0725 S0725-Mar01-13-10-01 2007-03-01 14:17:29.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 2 CORRECT 1 "d=1.50 cm" Self-explanation Control WRITE-KNOWN-VALUE-EQN 39 (= s_ELECTRON_12 (DNUM 1.5 cm)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:17:32.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 HINT Vector-10 label=v0 Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0725 S0725-Mar01-13-10-01 2007-03-01 14:18:11.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 2 HINT #.(wb-quant '(define-variable "v" |instantaneous| |velocity| |electron| |T1| |NIL| NIL "") 'mag) Yes. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0725 S0725-Mar01-13-10-01 2007-03-01 14:19:15.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 3 HINT (lk-no-s ((?axis . x))) The principle that you chose is correct, but it should be applied along the Y axis in this problem. Do you wish to use that axis instead? 3 3 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0725 S0725-Mar01-13-10-01 2007-03-01 14:19:21.0 US/Eastern HINT_REQUEST Choose- HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 4 HINT "Yes" Yep. Your goal should be choosing a particular kinematic equation containing the duration of the interval from T0 to T1. 4 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0725 S0725-Mar01-13-10-01 2007-03-01 14:19:28.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 5 HINT You should be drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 5 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0725 S0725-Mar01-13-10-01 2007-03-01 14:19:36.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 6 HINT Notice that the electron is momentarily at rest at T0. 6 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0725 S0725-Mar01-13-10-01 2007-03-01 14:19:43.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 7 HINT When an object is at rest even momentarily, its velocity at that moment is zero. 7 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0725 S0725-Mar01-13-10-01 2007-03-01 14:19:46.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 8 HINT Because the electron is at rest at T0, use the velocity tool to draw a zero-length velocity vector for it. 8 8 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST 34 S0725 S0725-Mar01-13-10-01 2007-03-01 14:20:21.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 9 CORRECT Vector-9 label="v0";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0725 S0725-Mar01-13-10-01 2007-03-01 14:20:37.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Why don't you continue with the solution by working on applying the definition of average acceleration on the electron from T0 to T1. 1 Self-explanation Control DRAW-ACCEL-SPEED-UP S0725 S0725-Mar01-13-10-01 2007-03-01 14:20:48.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Try choosing a particular kinematic equation containing the duration of the interval from T0 to T1. 2 Self-explanation Control DRAW-ACCEL-SPEED-UP S0725 S0725-Mar01-13-10-01 2007-03-01 14:22:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT 2 "a(avg)_y=vf_y-vi_y/ (T1-T0)" Syntax error in a(avg)_y=vf_y-vi_y/ (T1-T0) 1 Self-explanation Control DRAW-ACCEL-SPEED-UP 33 ? S0725 S0725-Mar01-13-10-01 2007-03-01 14:22:48.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT The equation or the units in it are not in a recognizable form. 2 Self-explanation Control DRAW-ACCEL-SPEED-UP S0725 S0725-Mar01-13-10-01 2007-03-01 14:23:02.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 INCORRECT 2 "a(avg)_y=vf_y-vi_y/ t" Syntax error in a(avg)_y=vf_y-vi_y/ t 1 Self-explanation Control DRAW-ACCEL-SPEED-UP ? S0725 S0725-Mar01-13-10-01 2007-03-01 14:23:44.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 INCORRECT 2 "a(avg)_y = (vf_y-vi_y) / t" Syntax error in a(avg)_y = (vf_y-vi_y) / t 1 Self-explanation Control DRAW-ACCEL-SPEED-UP ? S0725 S0725-Mar01-13-10-01 2007-03-01 14:24:02.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 INCORRECT 2 "a(avg)_y = (vf_y-vi_y) /t" Syntax error in a(avg)_y = (vf_y-vi_y) /t 1 Self-explanation Control DRAW-ACCEL-SPEED-UP ? S0725 S0725-Mar01-13-10-01 2007-03-01 14:24:04.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 HINT The equation or the units in it are not in a recognizable form. 2 Self-explanation Control DRAW-ACCEL-SPEED-UP S0725 S0725-Mar01-13-10-01 2007-03-01 14:25:30.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 CORRECT Vector-10 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=36 Self-explanation Control DRAW-ACCEL-SPEED-UP S0725 S0725-Mar01-13-10-01 2007-03-01 14:26:07.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 1 CORRECT Var-11 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Self-explanation Control DEFINE-DURATION S0725 S0725-Mar01-13-10-01 2007-03-01 14:26:11.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 INCORRECT 2 "a_y = (vf_y-vi_y) /t" Undefined variables: (vf_y vi_y) 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 14:26:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 INCORRECT Vector-12 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 14:26:45.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 3 HINT Vector-12 label=v Is the electron is at rest at T1? 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 14:27:03.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 4 CORRECT Vector-12 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=31 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 14:27:23.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_1_0 0)) 1 CORRECT 2 "a_y = (v-v0) /t" Although equation 3 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control COMPO-ZERO-VECTOR 38 (= Yc_a_ELECTRON_12_0 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:27:23.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 1 CORRECT 2 "a_y = (v-v0) /t" Although equation 3 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control WRITE-LK-NO-S-COMPO 38 (= Yc_a_ELECTRON_12_0 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:27:23.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 1 CORRECT 2 "a_y = (v-v0) /t" Although equation 3 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control WRITE-IMPLICIT-EQN 38 (= Yc_a_ELECTRON_12_0 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:27:23.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 1 CORRECT 2 "a_y = (v-v0) /t" Although equation 3 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control COMPO-PARALLEL-AXIS 38 (= Yc_a_ELECTRON_12_0 (/ (- v_ELECTRON_2 v_ELECTRON_1) t_12)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:27:47.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A CALC_REQUEST 1 HINT Var-4 label=se It is good practice to identify the fundamental vector principles you are using by writing them purely symbolically in component form before combining them with other equations or given values. Select "Review Physics Equations" on the Help menu to view a list of principles and their standard forms. 2 Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 14:28:09.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 2 INCORRECT 3 "v" Unable to solve for v. Try the light-bulb if you need a hint about a step that still needs to be done. 1 Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 14:28:16.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Why don't you continue with the solution by working on applying Newton's second law to the electron from T0 to T1. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 14:29:35.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT 3 "F= (me)*(a)" Undefined variable: F 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 14:29:43.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 14:31:11.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 4 CORRECT Vector-13 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=57 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 14:31:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 3 "F= (me)*(a)" Self-explanation Control (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:32:11.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A CALC_REQUEST 3 HINT Var-4 label=se Why don't you continue working on applying Newton's second law to the electron from T0 to T1. 1 Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 14:32:30.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 4 INCORRECT 4 "v" Unable to solve for v. Try the light-bulb if you need a hint about a step that still needs to be done. 1 Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 14:34:03.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 1 HINT Why don't you continue working on applying Newton's second law to the electron from T0 to T1. 1 Self-explanation Control WRITE-NSL-COMPO S0725 S0725-Mar01-13-10-01 2007-03-01 14:34:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 2 HINT You can apply Newton's second law to the electron. Note that the electron is accelerating from T0 to T1. 2 Self-explanation Control WRITE-NSL-COMPO S0725 S0725-Mar01-13-10-01 2007-03-01 14:34:12.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 3 HINT Newton's second law F = m*a states that the net force on an object = the object's mass times its acceleration. Because the net force is the vector sum of all forces on the object, this can be applied component-wise to relate the sum of the force components in any direction to the mass times the component of acceleration in that direction. 3 Self-explanation Control WRITE-NSL-COMPO S0725 S0725-Mar01-13-10-01 2007-03-01 14:34:40.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 4 HINT Write Newton's second law in terms of component variables along the y axis as F_y = me * a_y 4 4 Self-explanation Control WRITE-NSL-COMPO 33 S0725 S0725-Mar01-13-10-01 2007-03-01 14:35:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 5 CORRECT 3 "F_y= (me)*(a_y)" Self-explanation Control WRITE-NSL-COMPO 42 (= Yc_Fe_ELECTRON_PLATES_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:35:14.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 5 INCORRECT 4 "v" Unable to solve for v. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 14:35:20.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 HINT Why don't you continue with the solution by working on applying the definition of electric field magnitude at the electron from T0 to T1. 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0725 S0725-Mar01-13-10-01 2007-03-01 14:36:37.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 2 HINT What is the relationship between the force, the charge and the electric field? 2 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0725 S0725-Mar01-13-10-01 2007-03-01 14:37:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 3 INCORRECT 4 "F = abs(q) * E" Undefined variable: q 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG S0725 S0725-Mar01-13-10-01 2007-03-01 14:37:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 4 CORRECT 4 "F = abs(qe) * E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 51 (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:37:28.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 6 INCORRECT 5 "v" Unable to solve for v. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 14:37:37.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ 0 (* 0.5 Yc_a_ELECTRON_12_0 (^ t_12 2))))) 1 HINT Why don't you continue with the solution by working on writing the constant acceleration equation d_y = v0_y*t + 0.5*a_y*t^2 for the electron from T0 to T1. 1 Self-explanation Control WRITE-LK-NO-VF-COMPO S0725 S0725-Mar01-13-10-01 2007-03-01 14:38:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ 0 (* 0.5 Yc_a_ELECTRON_12_0 (^ t_12 2))))) 2 CORRECT 5 "d_y = v0_y*t + 0.5*a_y*t^2" Self-explanation Control WRITE-LK-NO-VF-COMPO 59 (= Yc_s_ELECTRON_12_0 (+ (* Yc_v_ELECTRON_1_0 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0725 S0725-Mar01-13-10-01 2007-03-01 14:38:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_1_0 0)) 2 CORRECT 5 "d_y = v0_y*t + 0.5*a_y*t^2" Self-explanation Control COMPO-ZERO-VECTOR 59 (= Yc_s_ELECTRON_12_0 (+ (* Yc_v_ELECTRON_1_0 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0725 S0725-Mar01-13-10-01 2007-03-01 14:39:17.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 7 INCORRECT 6 "v" Unable to solve for v. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 14:39:25.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the electric force on the electron from T0 to T1 due to the plates onto the y axis. 1 Self-explanation Control COMPO-PARALLEL-AXIS S0725 S0725-Mar01-13-10-01 2007-03-01 14:39:32.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 2 HINT Since the electric force on the electron from T0 to T1 due to the plates from T0 to T1 lies along the y axis, it has a non-zero component along that axis. 2 Self-explanation Control COMPO-PARALLEL-AXIS S0725 S0725-Mar01-13-10-01 2007-03-01 14:39:34.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Self-explanation Control COMPO-PARALLEL-AXIS S0725 S0725-Mar01-13-10-01 2007-03-01 14:40:20.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 4 HINT Since the electric force on the electron from T0 to T1 due to the plates from T0 to T1 lies along the y axis and points in the + y direction, write the equation F_y = F. 4 4 Self-explanation Control COMPO-PARALLEL-AXIS 54 S0725 S0725-Mar01-13-10-01 2007-03-01 14:40:42.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 5 CORRECT 6 "F_y=F" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_Fe_ELECTRON_PLATES_12_0 Fe_ELECTRON_PLATES_12) S0725 S0725-Mar01-13-10-01 2007-03-01 14:40:48.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 8 INCORRECT 7 "v" Unable to solve for v. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 14:40:52.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the displacement of the electron from T0 to T1 onto the y axis. 1 Self-explanation Control COMPO-PARALLEL-AXIS S0725 S0725-Mar01-13-10-01 2007-03-01 14:41:00.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 2 HINT Since the displacement of the electron from T0 to T1 from T0 to T1 lies along the y axis, it has a non-zero component along that axis. 2 Self-explanation Control COMPO-PARALLEL-AXIS S0725 S0725-Mar01-13-10-01 2007-03-01 14:41:06.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Self-explanation Control COMPO-PARALLEL-AXIS S0725 S0725-Mar01-13-10-01 2007-03-01 14:41:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 4 HINT Since the displacement of the electron from T0 to T1 from T0 to T1 lies along the y axis and points in the + y direction, write the equation d_y = d. 4 4 Self-explanation Control COMPO-PARALLEL-AXIS 49 S0725 S0725-Mar01-13-10-01 2007-03-01 14:41:29.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 5 CORRECT 7 "d_y=d" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_s_ELECTRON_12_0 s_ELECTRON_12) S0725 S0725-Mar01-13-10-01 2007-03-01 14:41:35.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A CALC_REQUEST 9 HINT Var-4 label=se You have completed all of the principle applications necessary to solve this problem. Right click in the first empty line in the equation pane and use 'Solve For...' to find a value for the sought quantity (if you have not already) and then enter that value in the answer box. 1 1 Self-explanation Control 44 S0725 S0725-Mar01-13-10-01 2007-03-01 14:41:44.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 10 CORRECT 8 "v" Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 14:41:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 3 CORRECT 8 "v = 1.0265413032123342e+7 m/s" Although equation 9 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN 45 (= v_ELECTRON_2 (DNUM 1.0265413032123342e+7 m/s)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:41:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 6 CORRECT 8 "v = 1.0265413032123342e+7 m/s" Although equation 9 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control COMPO-PARALLEL-AXIS 45 (= v_ELECTRON_2 (DNUM 1.0265413032123342e+7 m/s)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:41:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= m_ELECTRON (DNUM 9.11e-31 kg))) 1 CORRECT 8 "v = 1.0265413032123342e+7 m/s" Although equation 9 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN 45 (= v_ELECTRON_2 (DNUM 1.0265413032123342e+7 m/s)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:41:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Q_ELECTRON (DNUM -1.5999999999999998e-19 C))) 1 CORRECT 8 "v = 1.0265413032123342e+7 m/s" Although equation 9 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN 45 (= v_ELECTRON_2 (DNUM 1.0265413032123342e+7 m/s)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:41:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 2 CORRECT 8 "v = 1.0265413032123342e+7 m/s" Although equation 9 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN 45 (= v_ELECTRON_2 (DNUM 1.0265413032123342e+7 m/s)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:41:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 5 CORRECT 8 "v = 1.0265413032123342e+7 m/s" Although equation 9 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 45 (= v_ELECTRON_2 (DNUM 1.0265413032123342e+7 m/s)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:41:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 6 CORRECT 8 "v = 1.0265413032123342e+7 m/s" Although equation 9 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control COMPO-PARALLEL-AXIS 45 (= v_ELECTRON_2 (DNUM 1.0265413032123342e+7 m/s)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:41:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 6 CORRECT 8 "v = 1.0265413032123342e+7 m/s" Although equation 9 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control WRITE-NSL-COMPO 45 (= v_ELECTRON_2 (DNUM 1.0265413032123342e+7 m/s)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:41:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 CORRECT 8 "v = 1.0265413032123342e+7 m/s" Although equation 9 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control WRITE-LK-NO-T-COMPO 45 (= v_ELECTRON_2 (DNUM 1.0265413032123342e+7 m/s)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:41:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 2 CORRECT 8 "v = 1.0265413032123342e+7 m/s" Although equation 9 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control COMPO-PARALLEL-AXIS 45 (= v_ELECTRON_2 (DNUM 1.0265413032123342e+7 m/s)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:42:13.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 INCORRECT Answer-1 "1.07e+7 m/s" Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 14:42:22.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 2 CORRECT Answer-1 "1.03e+7 m/s" Self-explanation Control 67 S0725 S0725-Mar01-13-10-01 2007-03-01 14:55:01.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 S0725 S0725-Mar01-13-10-01 2007-03-01 14:55:14.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 25 S0725 S0725-Mar01-13-10-01 2007-03-01 14:55:44.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-669 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=87 Self-explanation Control DRAW-FIELD-GIVEN-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 14:56:03.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 0 "E=4.00e-12 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 29 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:56:03.0 US/Eastern DELETION ELEC* ELEC6A Vector-670 Delete label=NIL Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 14:56:45.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-671 label="v0";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=48 Self-explanation Control DRAW-VELOCITY-STRAIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 14:57:03.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 1 "v0 = 4.30 m/s" Self-explanation Control WRITE-KNOWN-VALUE-EQN 32 (= v_ELECTRON_1 (DNUM 4.3 m/s)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:57:52.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT Var-672 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19" Forgot to put units on a number. 1 Self-explanation Control DEFINE-CHARGE (= Q_ELECTRON (- 1.5999999999999998e-19)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:58:10.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-672 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Self-explanation Control DEFINE-CHARGE 36 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) S0725 S0725-Mar01-13-10-01 2007-03-01 14:58:29.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-673 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 39 (= m_ELECTRON (DNUM 9.11e-31 kg)) S0725 S0725-Mar01-13-10-01 2007-03-01 14:58:34.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 INCORRECT 2 "F = abs(q) * E" Undefined variable: F 1 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0725 S0725-Mar01-13-10-01 2007-03-01 14:58:59.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 CORRECT Vector-674 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=43 Self-explanation Control DRAW-ACCEL-SLOW-DOWN S0725 S0725-Mar01-13-10-01 2007-03-01 14:59:28.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-675 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=270;mag=60 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 14:59:38.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Vector-675 label=F Do you really want the direction of that vector to be 270 degrees? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 14:59:54.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 CORRECT Vector-675 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=60 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR S0725 S0725-Mar01-13-10-01 2007-03-01 15:00:02.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 2 "F = abs(q) * E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 51 (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) S0725 S0725-Mar01-13-10-01 2007-03-01 15:00:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT 3 "F = m *a" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 50 (= Fe_ELECTRON_UNSPECIFIED_12 (* m_ELECTRON a_ELECTRON_12)) S0725 S0725-Mar01-13-10-01 2007-03-01 15:00:22.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT 3 What equation do you wish to write? 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 15:00:47.0 US/Eastern HINT_REQUEST Choose-Equation HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT (nsl ((?axis . x))) Are you sure that you meant the X axis? There are no instances of the equation you selected along that axis. However there are one or more correct instances along the Y axis. Do you want to use the other axis? 2 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 15:00:52.0 US/Eastern HINT_REQUEST Choose- HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT "Yes" You should write the equation in the form F1_y + F2_y + ... = m*a_y using your own variables. If you do not what to write this equation and are not sure what to do, why don't you call Light-Bulb-Help. 3 3 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 45 S0725 S0725-Mar01-13-10-01 2007-03-01 15:01:15.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 INCORRECT 3 "F_y= m * a" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (* m_ELECTRON a_ELECTRON_12)) S0725 S0725-Mar01-13-10-01 2007-03-01 15:01:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 INCORRECT 3 "F_y= m * a_y" Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0)) S0725 S0725-Mar01-13-10-01 2007-03-01 15:01:22.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 HINT 3 What equation do you wish to write? 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 15:01:23.0 US/Eastern CANCEL ELEC* ELEC6A Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 15:01:23.0 US/Eastern DELETION ELEC* ELEC6A 3 Delete Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 15:04:00.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 CORRECT Vector-676 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=66 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT S0725 S0725-Mar01-13-10-01 2007-03-01 15:04:31.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-677 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST S0725 S0725-Mar01-13-10-01 2007-03-01 15:04:45.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (DEFINE-VAR (DURATION (DURING 1 2))) 1 INCORRECT 3 "d_y = v0*t + .5*a_y*t^2" Undefined variables: (t t) 1 Self-explanation Control DEFINE-DURATION S0725 S0725-Mar01-13-10-01 2007-03-01 15:05:10.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (DURATION (DURING 1 2))) 2 CORRECT Var-678 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Self-explanation Control DEFINE-DURATION S0725 S0725-Mar01-13-10-01 2007-03-01 15:05:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 CORRECT 3 "d_y = v0*t + .5*a_y*t^2" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control COMPO-PARALLEL-AXIS 52 (= Yc_s_ELECTRON_12_0 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0725 S0725-Mar01-13-10-01 2007-03-01 15:05:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 CORRECT 3 "d_y = v0*t + .5*a_y*t^2" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Self-explanation Control WRITE-LK-NO-T-COMPO 52 (= Yc_s_ELECTRON_12_0 (+ (* v_ELECTRON_1 t_12) (* (* 0.5 Yc_a_ELECTRON_12_0) (^ t_12 2)))) S0725 S0725-Mar01-13-10-01 2007-03-01 15:06:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A 4 1 INCORRECT 4 "F = m * a" Self-explanation Control 51 (= Fe_ELECTRON_UNSPECIFIED_12 (* m_ELECTRON a_ELECTRON_12)) S0725 S0725-Mar01-13-10-01 2007-03-01 15:06:03.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Ask-Equation ELEC* ELEC6A 4 2 HINT 4 What equation do you wish to write? 1 Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 15:06:12.0 US/Eastern HINT_REQUEST Choose-Equation HINT_MSG Whats-Wrong ELEC* ELEC6A Unknown 1 HINT (nsl ((?axis . x))) Are you sure that you meant the X axis? There are no instances of the equation you selected along that axis. However there are one or more correct instances along the Y axis. Do you want to use the other axis? 2 2 Self-explanation Control S0725 S0725-Mar01-13-10-01 2007-03-01 15:06:27.0 US/Eastern HINT_REQUEST Choose- HINT_MSG Whats-Wrong ELEC* ELEC6A Unknown 2 HINT "Yes" You should write the equation in the form F1_y + F2_y + ... = m*a_y using your own variables. If you do not what to write this equation and are not sure what to do, why don't you call Light-Bulb-Help. 3 3 Self-explanation Control 46 S0725 S0725-Mar01-13-10-01 2007-03-01 15:06:27.0 US/Eastern DELETION ELEC* ELEC6A Vector-679 Delete label=NIL Self-explanation Control s0701 s0701-Jan30-19-02-18 2007-01-30 19:08:56.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 HINT Var-5 label=q It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Joint Explanation Experimental DEFINE-CHARGE s0701 s0701-Jan30-19-02-18 2007-01-30 19:09:41.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 INCORRECT 0 "E=14.3e+3 N/C" Undefined variable: E 1 Joint Explanation Experimental DEFINE-CHARGE s0701 s0701-Jan30-19-02-18 2007-01-30 19:09:41.0 US/Eastern DELETION FOR* FOR4C Var-1 Delete label=NIL Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:09:41.0 US/Eastern DELETION FOR* FOR4C Var-2 Delete label=NIL Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:12:18.0 US/Eastern ATTEMPT Variable RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 3 INCORRECT Var-3 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6" Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE (= Q_PARTICLE (- 7.900000000000001e-6)) s0701 s0701-Jan30-19-02-18 2007-01-30 19:12:29.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 4 HINT Var-3 label=q Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE s0701 s0701-Jan30-19-02-18 2007-01-30 19:12:40.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 5 CORRECT Var-3 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Joint Explanation Experimental DEFINE-CHARGE 9 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) s0701 s0701-Jan30-19-02-18 2007-01-30 19:13:43.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (DRAW-AXES 0) 1 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Joint Explanation Experimental DRAW-UNROTATED-AXES s0701 s0701-Jan30-19-02-18 2007-01-30 19:13:49.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp FOR* FOR4C (DRAW-AXES 0) 2 HINT You should use the body tool to draw a body choosing the particle as the body. 2 2 Joint Explanation Experimental DRAW-BODY 4 s0701 s0701-Jan30-19-02-18 2007-01-30 19:13:49.0 US/Eastern DELETION FOR* FOR4C Axes-4 Delete label=NIL Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:13:49.0 US/Eastern DELETION FOR* FOR4C Axes-5 Delete label=NIL Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:14:22.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 3 CORRECT Axes-6 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 15 s0701 s0701-Jan30-19-02-18 2007-01-30 19:14:46.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 1 CORRECT System-7 label="particle";body=particle;time=NIL Joint Explanation Experimental DRAW-BODY 26 s0701 s0701-Jan30-19-02-18 2007-01-30 19:15:35.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 CORRECT Vector-8 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=88 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 19:15:45.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 0 "E=14.3e+3 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 34 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) s0701 s0701-Jan30-19-02-18 2007-01-30 19:16:00.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C CALC_REQUEST 1 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:16:01.0 US/Eastern CANCEL FOR* FOR4C Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:16:13.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C CALC_REQUEST 2 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:16:38.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle FOR* FOR4C CALC_REQUEST 3 HINT #.(wb-quant '(define-variable "F" |Electric| |force| |particle| |T0| |Unspecified| NIL "") 'mag) Right. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:17:50.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle FOR* FOR4C CALC_REQUEST 4 HINT (charge-force-efield ((?axis . x))) That principle is part of a valid solution to this problem but you cannot use it as the first principle. What is the first principle application that you wish to work on? You should look for a principle that contains the sought quantity itself. 3 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:17:55.0 US/Eastern CANCEL FOR* FOR4C Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:19:09.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 5 INCORRECT 3 "E_x" Unable to solve for E_x. Try the light-bulb if you need a hint about a step that still needs to be done. 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:19:39.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 6 INCORRECT 3 "E_y" Unable to solve for E_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:19:51.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C CALC_REQUEST 7 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:20:16.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought FOR* FOR4C CALC_REQUEST 8 HINT #.(wb-quant '(define-variable "F" |Electric| |force| |particle| |T0| |Unspecified| NIL "") 'xc) That quantity is not sought by the problem statement. 2 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:20:26.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought FOR* FOR4C CALC_REQUEST 9 HINT #.(wb-quant '(define-variable "F" |Electric| |force| |particle| |T0| |Unspecified| NIL "") 'xc) In order to move ahead, you have to try selecting something that you haven't tried before. 3 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:20:31.0 US/Eastern CANCEL FOR* FOR4C Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:20:31.0 US/Eastern DELETION FOR* FOR4C 1 Delete Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:20:44.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 10 INCORRECT 1 "E_x" Unable to solve for E_x. Try the light-bulb if you need a hint about a step that still needs to be done. 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:22:20.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 11 INCORRECT 1 "E_x" Unable to solve for E_x. Try the light-bulb if you need a hint about a step that still needs to be done. 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:22:25.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 HINT Vector-4 label=F Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 19:22:39.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT #.(wb-quant '(define-variable "F" |Electric| |force| |particle| |T0| |Unspecified| NIL "") 'mag) Right indeed. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 19:22:41.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 HINT (charge-force-efield ((?axis . x))) That principle is part of a valid solution to this problem but you cannot use it as the first principle. What is the first principle application that you wish to work on? You should look for a principle that contains the sought quantity itself. 3 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 19:22:43.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 4 HINT (charge-force-efield ((?axis . x))) You have already tried that principle application. As I told you then it is wrong. In order to move ahead you need to try something that you have not tried before. Why don't you do that now. What is the first principle application that you wish to work on? You should look for a principle that contains the sought quantity itself. 4 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 19:23:39.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 5 HINT charge-force-efield-mag Right. A good step would be introducing a variable for the magnitude of the electric force on the particle at T0 due to an unspecified agent. 5 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 19:24:09.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 6 INCORRECT 1 "F=abs(q)*E" Undefined variable: F 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 19:24:09.0 US/Eastern DELETION FOR* FOR4C 1 Delete Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:24:36.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 INCORRECT 5 "F=abs(q)*E" Undefined variable: F 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 19:25:23.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 7 INCORRECT Vector-9 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=73 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 19:25:26.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 2 CORRECT 5 "F=abs(q)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 67 (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED)) s0701 s0701-Jan30-19-02-18 2007-01-30 19:25:39.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 8 HINT Vector-9 label=F Do you really want the direction of that vector to be 22 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 19:25:46.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 9 HINT Think about how the direction of the electric force on the particle due to an unspecified agent is related to the direction of the electric field vector. 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 19:26:41.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 10 CORRECT Vector-9 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=73 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 68 s0701 s0701-Jan30-19-02-18 2007-01-30 19:26:44.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 3 CORRECT 5 "F=abs(q)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED)) s0701 s0701-Jan30-19-02-18 2007-01-30 19:27:42.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 4 CORRECT 5 "F=abs(q)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED)) s0701 s0701-Jan30-19-02-18 2007-01-30 19:27:42.0 US/Eastern CALC_REQUEST Simplify CALC_RESULT FOR* FOR4C CALC_REQUEST 12 CORRECT 6 "F=abs(q)*E" Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:27:49.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 "0.11297 N" Joint Explanation Experimental 93 s0701 s0701-Jan30-19-02-18 2007-01-30 19:39:48.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1A (DRAW-AXES 0) 1 CORRECT Axes-667 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-COMPO-FORM-AXES 15 s0701 s0701-Jan30-19-02-18 2007-01-30 19:40:27.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1A (BODY OIL_DROP TIME NIL) 1 CORRECT System-668 label="oil";body=oil_drop;time=NIL Joint Explanation Experimental DRAW-BODY 25 s0701 s0701-Jan30-19-02-18 2007-01-30 19:40:37.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1A (BODY OIL_DROP TIME NIL) 2 INCORRECT System-669 label="earth";body=earth;time=NIL Joint Explanation Experimental DRAW-BODY 23 s0701 s0701-Jan30-19-02-18 2007-01-30 19:41:17.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1A (VECTOR (FORCE OIL_DROP EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 CORRECT Vector-670 label="Fg";type=Force;body=oil_drop;agent=earth;forcetype=grav;time=T0;dir=270;mag=137 Joint Explanation Experimental DRAW-WEIGHT 24 s0701 s0701-Jan30-19-02-18 2007-01-30 19:41:59.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1A (VECTOR (FORCE OIL_DROP UNSPECIFIED ELECTRIC TIME 1) UNKNOWN) 1 INCORRECT Vector-671 label="Fe";type=Force;body=oil_drop;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=171 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-UNKNOWN 23 s0701 s0701-Jan30-19-02-18 2007-01-30 19:42:07.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1A (VECTOR (FORCE OIL_DROP UNSPECIFIED ELECTRIC TIME 1) UNKNOWN) 2 HINT Vector-671 label=Fe When the direction of a vector is not given or easily inferred from the problem statement, you should mark it unknown. Since drawing the vector automatically fills in a value for the vector's orientation angle, you have to erase this value in the dialog box to mark the direction unknown. 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-UNKNOWN s0701 s0701-Jan30-19-02-18 2007-01-30 19:42:52.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1A (VECTOR (FORCE OIL_DROP UNSPECIFIED ELECTRIC TIME 1) UNKNOWN) 3 INCORRECT Vector-671 label="Fe";type=Force;body=oil_drop;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=171 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-UNKNOWN 22 s0701 s0701-Jan30-19-02-18 2007-01-30 19:43:03.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1A (VECTOR (FORCE OIL_DROP UNSPECIFIED ELECTRIC TIME 1) UNKNOWN) 4 CORRECT Vector-671 label="Fe";type=Force;body=oil_drop;agent=Unspecified;forcetype=Electric;time=T0;dir=NIL;mag=171 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-UNKNOWN 23 s0701 s0701-Jan30-19-02-18 2007-01-30 19:43:53.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1A (DEFINE-VAR (MASS OIL_DROP TIME NIL)) 1 CORRECT Var-672 label="mo";quant=mass;subtype=NIL;body=oil_drop;agent=NIL;time=NIL;value="5.00e-16 kg" Joint Explanation Experimental DEFINE-MASS 31 (= m_OIL_DROP (DNUM 5.000000000000001e-16 kg)) s0701 s0701-Jan30-19-02-18 2007-01-30 19:44:16.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1A (DEFINE-VAR (CHARGE OIL_DROP SURFACE NIL TIME NIL)) 1 CORRECT Var-673 label="qo";quant=charge-on;subtype=NIL;body=oil_drop;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 38 (= Q_OIL_DROP (* (- 1.5999999999999998e-19) (DNUM 1 C))) s0701 s0701-Jan30-19-02-18 2007-01-30 19:44:44.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1A CALC_REQUEST 1 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:45:17.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC1A CALC_REQUEST 2 HINT #.(wb-quant '(define-variable "F" |Weight| |force| |oil_drop| |T0| |earth| NIL "") 'mag) That quantity is not sought by the problem statement. 2 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:45:39.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC1A CALC_REQUEST 3 HINT #.(wb-quant '(define-variable "F" |Electric| |force| |oil_drop| |T0| |Unspecified| NIL "") 'yc) That quantity is not sought by the problem statement. 3 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:45:49.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG NextStepHelp ELEC* ELEC1A CALC_REQUEST 4 HINT #.(wb-quant '(define-variable "F" |Weight| |force| |oil_drop| |T0| |Unspecified| NIL "") 'yc) That quantity is not mentioned in the Andes solution. Let's just assume that you are seeking the y component of the electric field at the region due to an unspecified agent. 4 4 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:45:53.0 US/Eastern HINT_REQUEST Choose- HINT_MSG Ask-Principle ELEC* ELEC1A CALC_REQUEST 5 HINT "OK" What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 5 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:47:09.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle ELEC* ELEC1A CALC_REQUEST 6 HINT charge-force-efield-mag No principle applications of the type that you selected appear in the solution. What is the first principle application that you wish to work on? You should look for a principle that contains the sought quantity itself. 6 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:47:15.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG Ask-Principle ELEC* ELEC1A CALC_REQUEST 7 HINT charge-force-efield-mag You have already tried that principle application. As I told you then it is wrong. In order to move ahead you need to try something that you have not tried before. Why don't you do that now. What is the first principle application that you wish to work on? You should look for a principle that contains the sought quantity itself. 7 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:47:47.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC1A CALC_REQUEST 8 HINT (charge-force-efield ((?axis . y))) Yep. Note the electric field at the region. 8 Joint Explanation Experimental DRAW-FIELD-UNKNOWN s0701 s0701-Jan30-19-02-18 2007-01-30 19:48:26.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1A CALC_REQUEST 9 INCORRECT 0 "F_y=q*E_y" Undefined variables: (F_y q E_y) 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:48:45.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1A CALC_REQUEST 10 INCORRECT 1 "Fg_y" Unable to solve for Fg_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:48:52.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1A No Intepretation 1 HINT Why don't you continue with the solution by working on applying the definition of electric field on the oil_drop at T0. 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:49:02.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1A No Intepretation 2 HINT Note the electric field at the region. 2 Joint Explanation Experimental DRAW-FIELD-UNKNOWN s0701 s0701-Jan30-19-02-18 2007-01-30 19:49:04.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1A No Intepretation 3 HINT In this problem, the exact direction of the electric field vector is not given, so you can draw the vector at an approximately angle and leave the exact angle unspecified. 3 Joint Explanation Experimental DRAW-FIELD-UNKNOWN s0701 s0701-Jan30-19-02-18 2007-01-30 19:49:18.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1A No Intepretation 4 HINT Draw the electric field at the region due to an unspecified agent, then erase the number in the direction slot to indicate that the exact direction is not being specified. 4 4 Joint Explanation Experimental DRAW-FIELD-UNKNOWN 33 s0701 s0701-Jan30-19-02-18 2007-01-30 19:50:06.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1A No Intepretation 5 TRUE_BUT_IRRELEVANT 1 "Fe=g*mo" Joint Explanation Experimental (= F_OIL_DROP_UNSPECIFIED_1 (* g_EARTH m_OIL_DROP)) s0701 s0701-Jan30-19-02-18 2007-01-30 19:50:29.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1A CALC_REQUEST 11 INCORRECT 2 "Fe_y" Unable to solve for Fe_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:51:09.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1A (EQN (= Fw_OIL_DROP_EARTH_1 (* m_OIL_DROP g_EARTH))) 1 CORRECT 1 "Fg=g*mo" Joint Explanation Experimental WT-LAW (= Fw_OIL_DROP_EARTH_1 (* g_EARTH m_OIL_DROP)) s0701 s0701-Jan30-19-02-18 2007-01-30 19:51:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1A No Intepretation 6 TRUE_BUT_IRRELEVANT 2 "Fe_y=Fe" Joint Explanation Experimental (= Yc_F_OIL_DROP_UNSPECIFIED_1_0 F_OIL_DROP_UNSPECIFIED_1) s0701 s0701-Jan30-19-02-18 2007-01-30 19:51:48.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1A CALC_REQUEST 12 INCORRECT 3 "Fe_y" Unable to solve for Fe_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:51:54.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1A CALC_REQUEST 13 HINT Why don't you continue working on applying the definition of electric field on the oil_drop at T0. 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:51:59.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1A CALC_REQUEST 14 HINT Note the electric field at the region. 2 Joint Explanation Experimental DRAW-FIELD-UNKNOWN s0701 s0701-Jan30-19-02-18 2007-01-30 19:52:00.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1A CALC_REQUEST 15 HINT In this problem, the exact direction of the electric field vector is not given, so you can draw the vector at an approximately angle and leave the exact angle unspecified. 3 Joint Explanation Experimental DRAW-FIELD-UNKNOWN s0701 s0701-Jan30-19-02-18 2007-01-30 19:52:03.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1A CALC_REQUEST 16 HINT Draw the electric field at the region due to an unspecified agent, then erase the number in the direction slot to indicate that the exact direction is not being specified. 4 4 Joint Explanation Experimental DRAW-FIELD-UNKNOWN 28 s0701 s0701-Jan30-19-02-18 2007-01-30 19:52:16.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1A CALC_REQUEST 17 CORRECT 3 "Fg" Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:53:18.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1A CALC_REQUEST 18 INCORRECT 4 "$qFe" Unable to solve for $qFe. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:53:18.0 US/Eastern DELETION ELEC* ELEC1A 3 Delete Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:53:36.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1A CALC_REQUEST 19 INCORRECT 3 "Fe" Unable to solve for Fe. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:54:13.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1A CALC_REQUEST 20 CORRECT 3 "Fg" Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:54:43.0 US/Eastern ATTEMPT Answer RESULT Unsolicited ELEC* ELEC1A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) UNKNOWN) 1 INCORRECT Answer-1 "4.90e-15 N" Units are inconsistent. 1 1 Joint Explanation Experimental DRAW-FIELD-UNKNOWN s0701 s0701-Jan30-19-02-18 2007-01-30 19:56:06.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) UNKNOWN) 2 CORRECT Vector-674 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=NIL;mag=151 Joint Explanation Experimental DRAW-FIELD-UNKNOWN s0701 s0701-Jan30-19-02-18 2007-01-30 19:56:56.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1A (EQN (= Yc_Fw_OIL_DROP_EARTH_1_0 (- Fw_OIL_DROP_EARTH_1))) 1 INCORRECT 4 "E=Fg/qo" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= E_REGION_UNSPECIFIED (/ Fw_OIL_DROP_EARTH_1 Q_OIL_DROP)) s0701 s0701-Jan30-19-02-18 2007-01-30 19:56:56.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1A (EQN (= Yc_Fw_OIL_DROP_EARTH_1_0 (- Fw_OIL_DROP_EARTH_1))) 2 INCORRECT 4 "E=Fg/qo" Joint Explanation Experimental WRITE-NFL-COMPO (= E_REGION_UNSPECIFIED (/ Fw_OIL_DROP_EARTH_1 Q_OIL_DROP)) s0701 s0701-Jan30-19-02-18 2007-01-30 19:56:56.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1A (EQN (= Yc_Fw_OIL_DROP_EARTH_1_0 (- Fw_OIL_DROP_EARTH_1))) 3 INCORRECT 4 "E=Fg/qo" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO (= E_REGION_UNSPECIFIED (/ Fw_OIL_DROP_EARTH_1 Q_OIL_DROP)) s0701 s0701-Jan30-19-02-18 2007-01-30 19:56:59.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1A (EQN (= Yc_Fw_OIL_DROP_EARTH_1_0 (- Fw_OIL_DROP_EARTH_1))) 4 HINT 4 You used E, which is the MAGNITUDE of the electric field at the region due to an unspecified agent. Is that what you intended? 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS s0701 s0701-Jan30-19-02-18 2007-01-30 19:57:21.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1A (EQN (= Yc_Fw_OIL_DROP_EARTH_1_0 (- Fw_OIL_DROP_EARTH_1))) 5 CORRECT 4 "E_y=Fg/qo" Although equation 5 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 48 (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_OIL_DROP_EARTH_1 Q_OIL_DROP)) s0701 s0701-Jan30-19-02-18 2007-01-30 19:57:21.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1A (EQN (= (+ Yc_Fw_OIL_DROP_EARTH_1_0 Yc_F_OIL_DROP_UNSPECIFIED_1_0) 0)) 1 CORRECT 4 "E_y=Fg/qo" Although equation 5 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-NFL-COMPO 48 (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_OIL_DROP_EARTH_1 Q_OIL_DROP)) s0701 s0701-Jan30-19-02-18 2007-01-30 19:57:21.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1A (EQN (= Yc_F_OIL_DROP_UNSPECIFIED_1_0 (* Q_OIL_DROP Yc_E_REGION_UNSPECIFIED_0))) 1 CORRECT 4 "E_y=Fg/qo" Although equation 5 is correct, you have not displayed a fundamental principle being used in symbolic form all by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 48 (= Yc_E_REGION_UNSPECIFIED_0 (/ Fw_OIL_DROP_EARTH_1 Q_OIL_DROP)) s0701 s0701-Jan30-19-02-18 2007-01-30 19:57:35.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1A No Intepretation 7 HINT It is good practice to identify the fundamental principles you are using by writing them purely symbolically in standard form before combining them with other equations or given values. Select "Review Physics Equations" on the Help Menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:58:17.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1A No Intepretation 8 INCORRECT 0 "Fe=abs(qu)*E" Undefined variable: qu 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:58:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1A No Intepretation 9 TRUE_BUT_IRRELEVANT 0 "Fe=abs(qo)*E" Joint Explanation Experimental (= F_OIL_DROP_UNSPECIFIED_1 (* (ABS Q_OIL_DROP) E_REGION_UNSPECIFIED)) s0701 s0701-Jan30-19-02-18 2007-01-30 19:58:35.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1A CALC_REQUEST 21 CORRECT 4 "E_y" Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:58:35.0 US/Eastern DELETION ELEC* ELEC1A 4 Delete Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 19:58:47.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1A Answer-1 1 CORRECT Answer-1 " -30625 N/C" Joint Explanation Experimental 51 s0701 s0701-Jan30-19-02-18 2007-01-30 19:58:55.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1A Answer-1 2 CORRECT Answer-1 " -30625 N/C" Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:11:18.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-1 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 9 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) s0701 s0701-Jan30-19-02-18 2007-01-30 20:11:37.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-2 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 Kg" Joint Explanation Experimental DEFINE-MASS 12 (= m_ELECTRON (DNUM 9.11e-31 Kg)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:12:07.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-3 label="Ef";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=56 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 20:12:20.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 2 CORRECT Vector-3 label="Ef";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=56 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 20:12:47.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 INCORRECT 0 "Ef=2.00e+4" Forgot to put units on a number. 1 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= E_REGION_PLATES 20000.0) s0701 s0701-Jan30-19-02-18 2007-01-30 20:12:52.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 2 CORRECT 0 "Ef=2.00e+4 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 15 (= E_REGION_PLATES (DNUM 20000.0 N/C)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:12:52.0 US/Eastern DELETION ELEC* ELEC3A Var-4 Delete label=NIL Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:14:20.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-5 label="se";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value=".015 m" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0701 s0701-Jan30-19-02-18 2007-01-30 20:14:23.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Var-5 label=se Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 20:14:23.0 US/Eastern DELETION ELEC* ELEC3A Var-5 Delete label=se Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:15:23.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-6 label="Fe";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=109 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 20:15:23.0 US/Eastern DELETION ELEC* ELEC3A Axes-7 Delete label=NIL Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:15:23.0 US/Eastern DELETION ELEC* ELEC3A Axes-8 Delete label=NIL Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:15:43.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 1 CORRECT Axes-9 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 25 s0701 s0701-Jan30-19-02-18 2007-01-30 20:16:14.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-10 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=115 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP s0701 s0701-Jan30-19-02-18 2007-01-30 20:16:29.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 CORRECT Vector-11 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=150 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT s0701 s0701-Jan30-19-02-18 2007-01-30 20:16:39.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Joint Explanation Experimental DRAW-BODY s0701 s0701-Jan30-19-02-18 2007-01-30 20:16:50.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (BODY ELECTRON TIME NIL) 2 HINT You should use the body tool to draw a body choosing the electron as the body. 2 2 Joint Explanation Experimental DRAW-BODY 20 s0701 s0701-Jan30-19-02-18 2007-01-30 20:17:04.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 3 CORRECT System-12 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 30 s0701 s0701-Jan30-19-02-18 2007-01-30 20:17:12.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Var-7 label=s You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0701 s0701-Jan30-19-02-18 2007-01-30 20:17:26.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Var-7 label=s Your goal should be introducing a variable for the magnitude of the displacement of the electron from T0 to T1. 2 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0701 s0701-Jan30-19-02-18 2007-01-30 20:17:32.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Var-7 label=s Notice that the electron is moving in a straight line from T0 to T1. 3 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0701 s0701-Jan30-19-02-18 2007-01-30 20:17:52.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 INCORRECT Var-13 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value=".015 m" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0701 s0701-Jan30-19-02-18 2007-01-30 20:17:55.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT Var-13 label=s Although it is certainly correct to define a variable for the distance travelled by the electron, it is only used in the equation <speed> = <distance> / <duration>, which isn't useful for solving this problem. Can you think of a different princple? 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0701 s0701-Jan30-19-02-18 2007-01-30 20:18:23.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 CORRECT Vector-14 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=58 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0701 s0701-Jan30-19-02-18 2007-01-30 20:18:32.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 CORRECT Vector-14 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=58 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0701 s0701-Jan30-19-02-18 2007-01-30 20:18:32.0 US/Eastern DELETION ELEC* ELEC3A Var-13 Delete label=s Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:18:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 1 "d=.015 m" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 34 (= s_ELECTRON_12 (DNUM 0.015 m)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:19:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 CORRECT 2 "Fe=abs(qe)*Ef" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 46 (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:20:16.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 3 "Fe=me*a" Joint Explanation Experimental (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON a_ELECTRON_12)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:20:23.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 CORRECT 4 "a" Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:20:34.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 2 INCORRECT 5 "v" Unable to solve for v. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:22:13.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (DURATION (DURING 1 2))) 1 CORRECT Var-15 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Joint Explanation Experimental DEFINE-DURATION s0701 s0701-Jan30-19-02-18 2007-01-30 20:22:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 2 TRUE_BUT_IRRELEVANT 5 "d=.5*a*t^2" Joint Explanation Experimental (= s_ELECTRON_12 (* (* 0.5 a_ELECTRON_12) (^ t_12 2))) s0701 s0701-Jan30-19-02-18 2007-01-30 20:22:31.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 3 CORRECT 6 "t" Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:22:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 3 TRUE_BUT_IRRELEVANT 7 "v=0+a*t" Joint Explanation Experimental (= v_ELECTRON_2 (+ 0 (* a_ELECTRON_12 t_12))) s0701 s0701-Jan30-19-02-18 2007-01-30 20:22:56.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 4 CORRECT 8 "v" Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:23:23.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.03e+7 m/s" Joint Explanation Experimental 71 s0701 s0701-Jan30-19-02-18 2007-01-30 20:36:32.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT Var-667 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19" Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE (= Q_ELECTRON (- 1.5999999999999998e-19)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:36:41.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-667 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 6 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) s0701 s0701-Jan30-19-02-18 2007-01-30 20:36:58.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-668 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 Kg" Joint Explanation Experimental DEFINE-MASS 11 (= m_ELECTRON (DNUM 9.11e-31 Kg)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:37:10.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-669 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 21 s0701 s0701-Jan30-19-02-18 2007-01-30 20:37:10.0 US/Eastern DELETION ELEC* ELEC6A Vector-670 Delete label=NIL Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:37:46.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-671 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=99 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT 22 s0701 s0701-Jan30-19-02-18 2007-01-30 20:37:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 0 "vi=4.3 m/s" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 25 (= v_ELECTRON_1 (DNUM 4.3 m/s)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:38:29.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-672 label="Ee";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=121 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 26 s0701 s0701-Jan30-19-02-18 2007-01-30 20:38:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 1 "Ee=4.00e-12 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 29 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:39:10.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 INCORRECT Vector-673 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=269;mag=108 Joint Explanation Experimental DRAW-WEIGHT s0701 s0701-Jan30-19-02-18 2007-01-30 20:39:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 CORRECT 2 "Fg=g*me" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_12 (* g_EARTH m_ELECTRON)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:39:34.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 2 HINT Vector-673 label=Fg Do you really want the direction of that vector to be 269 degrees? 1 Joint Explanation Experimental DRAW-WEIGHT s0701 s0701-Jan30-19-02-18 2007-01-30 20:39:43.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 3 CORRECT Vector-673 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=108 Joint Explanation Experimental DRAW-WEIGHT s0701 s0701-Jan30-19-02-18 2007-01-30 20:39:50.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 2 CORRECT 2 "Fg=g*me" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_12 (* g_EARTH m_ELECTRON)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:40:14.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT 3 "Fe=abs(q)*Ee" Undefined variables: (Fe q) 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 20:41:05.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Vector-674 label="F";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=270;mag=117 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 20:41:14.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 INCORRECT Vector-674 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=NIL;mag=117 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 28 s0701 s0701-Jan30-19-02-18 2007-01-30 20:41:17.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Vector-674 label=Fe Do you really want the direction of that vector to be unknown? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 20:41:25.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 5 INCORRECT Vector-674 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=270;mag=117 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 20:41:27.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT Vector-674 label=Fe Do you really want the direction of that vector to be 270 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 20:41:33.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 7 CORRECT Vector-674 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=117 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0701 s0701-Jan30-19-02-18 2007-01-30 20:41:38.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 INCORRECT 3 "Fe=abs(q)*Ee" Undefined variable: q 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG s0701 s0701-Jan30-19-02-18 2007-01-30 20:41:47.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 CORRECT 3 "Fe=abs(qe)*Ee" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 40 (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:42:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= Xc_Fe_ELECTRON_UNSPECIFIED_12_0 0)) 1 INCORRECT 4 "Fe+Fg=me*g" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (+ Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON g_EARTH)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:42:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 3 INCORRECT 4 "Fe+Fg=me*g" Joint Explanation Experimental WT-LAW (= (+ Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON g_EARTH)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:42:50.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A CALC_REQUEST 1 HINT 4 You used Fe, which is the MAGNITUDE of the electric force on the electron from T0 to T1 due to an unspecified agent. Is that what you intended? 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:43:19.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A CALC_REQUEST 2 INCORRECT 4 "Fe-Fg=me*g" Joint Explanation Experimental (= (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON g_EARTH)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:44:07.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 3 INCORRECT 5 "Fe_y" Unable to solve for Fe_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:44:17.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Joint Explanation Experimental DRAW-BODY s0701 s0701-Jan30-19-02-18 2007-01-30 20:44:45.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 2 CORRECT System-675 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 50 s0701 s0701-Jan30-19-02-18 2007-01-30 20:44:53.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 HINT Vector-676 label=a Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN s0701 s0701-Jan30-19-02-18 2007-01-30 20:45:15.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 HINT #.(wb-quant '(define-variable "s" |NIL| |distance| |electron| |T0 to T1| |NIL| NIL "") 'NIL) That quantity is not mentioned in the Andes solution. 2 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN s0701 s0701-Jan30-19-02-18 2007-01-30 20:45:46.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 3 HINT #.(wb-quant '(define-variable "d" |NIL| |displacement| |electron| |T0 to T1| |NIL| NIL "") 'yc) That quantity is not sought by the problem statement. 3 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN s0701 s0701-Jan30-19-02-18 2007-01-30 20:45:59.0 US/Eastern CANCEL ELEC* ELEC6A Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:46:35.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 4 INCORRECT Vector-676 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=NIL;mag=47 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN 49 s0701 s0701-Jan30-19-02-18 2007-01-30 20:46:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 1 INCORRECT 4 "Fe-Fg=me*a" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON a_ELECTRON_12)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:46:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 1 INCORRECT 4 "Fe-Fg=me*a" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON a_ELECTRON_12)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:46:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 1 INCORRECT 4 "Fe-Fg=me*a" Joint Explanation Experimental WRITE-NSL-COMPO (= (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON a_ELECTRON_12)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:46:41.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT 4 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0701 s0701-Jan30-19-02-18 2007-01-30 20:47:42.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Vector-677 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=NIL;mag=213 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0701 s0701-Jan30-19-02-18 2007-01-30 20:47:51.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Vector-677 label=d Do you really want the direction of that vector to be unknown? 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0701 s0701-Jan30-19-02-18 2007-01-30 20:48:15.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 CORRECT Vector-677 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=213 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0701 s0701-Jan30-19-02-18 2007-01-30 20:48:25.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 5 HINT Vector-676 label=a Do you really want the direction of that vector to be unknown? 1 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN s0701 s0701-Jan30-19-02-18 2007-01-30 20:48:34.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 6 CORRECT Vector-676 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=47 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN s0701 s0701-Jan30-19-02-18 2007-01-30 20:48:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 2 INCORRECT 4 "Fe-Fg=me*a" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON a_ELECTRON_12)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:48:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 2 INCORRECT 4 "Fe-Fg=me*a" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON a_ELECTRON_12)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:48:39.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 2 INCORRECT 4 "Fe-Fg=me*a" Joint Explanation Experimental WRITE-NSL-COMPO (= (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12) (* m_ELECTRON a_ELECTRON_12)) s0701 s0701-Jan30-19-02-18 2007-01-30 20:49:25.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-678 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST s0701 s0701-Jan30-19-02-18 2007-01-30 20:49:36.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 1 CORRECT 5 "vf=0" Joint Explanation Experimental WRITE-IMPLICIT-EQN 50 (= v_ELECTRON_2 0) s0701 s0701-Jan30-19-02-18 2007-01-30 20:49:53.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (DEFINE-VAR (DURATION (DURING 1 2))) 1 INCORRECT 6 "vf=vi+a*t" Undefined variable: t 1 Joint Explanation Experimental DEFINE-DURATION 49 s0701 s0701-Jan30-19-02-18 2007-01-30 20:50:06.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (DURATION (DURING 1 2))) 2 CORRECT Var-679 label="t";quant=duration;subtype=NIL;body=NIL;agent=NIL;time=T0 to T1;value="" Joint Explanation Experimental DEFINE-DURATION s0701 s0701-Jan30-19-02-18 2007-01-30 20:50:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 1 INCORRECT 6 "vf=vi+a*t" Joint Explanation Experimental COMPO-ZERO-VECTOR (= v_ELECTRON_2 (+ v_ELECTRON_1 (* a_ELECTRON_12 t_12))) s0701 s0701-Jan30-19-02-18 2007-01-30 20:50:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 1 INCORRECT 6 "vf=vi+a*t" Joint Explanation Experimental WRITE-LK-NO-S-COMPO (= v_ELECTRON_2 (+ v_ELECTRON_1 (* a_ELECTRON_12 t_12))) s0701 s0701-Jan30-19-02-18 2007-01-30 20:50:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 2 INCORRECT 6 "vf=vi+a*t" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= v_ELECTRON_2 (+ v_ELECTRON_1 (* a_ELECTRON_12 t_12))) s0701 s0701-Jan30-19-02-18 2007-01-30 20:50:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 INCORRECT 6 "vf=vi+a*t" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= v_ELECTRON_2 (+ v_ELECTRON_1 (* a_ELECTRON_12 t_12))) s0701 s0701-Jan30-19-02-18 2007-01-30 20:50:10.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 2 INCORRECT 6 "vf=vi+a*t" Joint Explanation Experimental COMPO-ZERO-VECTOR (= v_ELECTRON_2 (+ v_ELECTRON_1 (* a_ELECTRON_12 t_12))) s0701 s0701-Jan30-19-02-18 2007-01-30 20:50:10.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 (+ Yc_v_ELECTRON_1_0 (* Yc_a_ELECTRON_12_0 t_12)))) 2 INCORRECT 6 "vf=vi+a*t" Joint Explanation Experimental WRITE-LK-NO-S-COMPO (= v_ELECTRON_2 (+ v_ELECTRON_1 (* a_ELECTRON_12 t_12))) s0701 s0701-Jan30-19-02-18 2007-01-30 20:50:10.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 3 INCORRECT 6 "vf=vi+a*t" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= v_ELECTRON_2 (+ v_ELECTRON_1 (* a_ELECTRON_12 t_12))) s0701 s0701-Jan30-19-02-18 2007-01-30 20:50:10.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 2 INCORRECT 6 "vf=vi+a*t" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= v_ELECTRON_2 (+ v_ELECTRON_1 (* a_ELECTRON_12 t_12))) s0701 s0701-Jan30-19-02-18 2007-01-30 20:50:14.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC6A CALC_REQUEST 4 HINT 6 You used a, which is the MAGNITUDE of the acceleration of the electron from T0 to T1. Is that what you intended? 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:50:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC6A CALC_REQUEST 5 HINT Instead of the magnitude, perhaps you should use the component along an axis. 2 2 Joint Explanation Experimental 44 s0701 s0701-Jan30-19-02-18 2007-01-30 20:50:33.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 6 INCORRECT 7 "a_y" Unable to solve for a_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:50:46.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 4 CORRECT 5 "vf=0" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= v_ELECTRON_2 0) s0701 s0701-Jan30-19-02-18 2007-01-30 20:50:46.0 US/Eastern DELETION ELEC* ELEC6A 6 Delete Joint Explanation Experimental s0701 s0701-Jan30-19-02-18 2007-01-30 20:51:08.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A CALC_REQUEST 7 INCORRECT 6 "a_y=a" Joint Explanation Experimental (= Yc_a_ELECTRON_12_0 a_ELECTRON_12) s0701 s0701-Jan30-19-02-18 2007-01-30 20:51:23.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 8 INCORRECT 8 "a_y" Unable to solve for a_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Joint Explanation Experimental s0702 s0702-Jan31-15-05-52 2007-01-31 15:15:52.0 US/Eastern DELETION FOR* FOR4C Axes-1 Delete label=NIL Joint Explanation Experimental s0702 s0702-Jan31-15-05-52 2007-01-31 15:15:52.0 US/Eastern DELETION FOR* FOR4C Axes-2 Delete label=NIL Joint Explanation Experimental s0702 s0702-Jan31-15-05-52 2007-01-31 15:17:19.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 1 CORRECT Axes-3 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 15 s0702 s0702-Jan31-15-05-52 2007-01-31 15:17:58.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 CORRECT Vector-4 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=137 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR s0702 s0702-Jan31-15-05-52 2007-01-31 15:18:27.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 1 CORRECT System-5 label="q";body=particle;time=NIL Joint Explanation Experimental DRAW-BODY 25 s0702 s0702-Jan31-15-05-52 2007-01-31 15:18:39.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 2 CORRECT System-5 label="q";body=particle;time=NIL Joint Explanation Experimental DRAW-BODY s0702 s0702-Jan31-15-05-52 2007-01-31 15:19:13.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 CORRECT Var-6 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6 C" Joint Explanation Experimental DEFINE-CHARGE 32 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) s0702 s0702-Jan31-15-05-52 2007-01-31 15:19:25.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 2 CORRECT Vector-4 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=138 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR s0702 s0702-Jan31-15-05-52 2007-01-31 15:20:04.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 CORRECT 0 "E=14.3e3 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 40 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) s0702 s0702-Jan31-15-05-52 2007-01-31 15:21:04.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 1 INCORRECT 1 "F=E*q" Undefined variable: F 1 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES 39 s0702 s0702-Jan31-15-05-52 2007-01-31 15:21:07.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 2 HINT Vector-7 label=F Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES s0702 s0702-Jan31-15-05-52 2007-01-31 15:21:07.0 US/Eastern DELETION FOR* FOR4C Vector-7 Delete label=NIL Joint Explanation Experimental s0702 s0702-Jan31-15-05-52 2007-01-31 15:22:11.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 3 INCORRECT Vector-8 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=22;mag=110 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES s0702 s0702-Jan31-15-05-52 2007-01-31 15:22:27.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 INCORRECT Vector-8 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=109 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 38 s0702 s0702-Jan31-15-05-52 2007-01-31 15:23:06.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 INCORRECT Vector-8 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=109 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0702 s0702-Jan31-15-05-52 2007-01-31 15:23:10.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 HINT Vector-8 label=F Do you really want the direction of that vector to be 22 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0702 s0702-Jan31-15-05-52 2007-01-31 15:23:43.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 4 INCORRECT Vector-8 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=22;mag=109 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0702 s0702-Jan31-15-05-52 2007-01-31 15:23:50.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 5 HINT Vector-8 label=F Do you really want the direction of that vector to be 22 degrees? 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0702 s0702-Jan31-15-05-52 2007-01-31 15:24:02.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 6 HINT Think about how the direction of the electric force on the particle due to an unspecified agent is related to the direction of the electric field vector. 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0702 s0702-Jan31-15-05-52 2007-01-31 15:24:02.0 US/Eastern DELETION FOR* FOR4C Vector-8 Delete label=F Joint Explanation Experimental s0702 s0702-Jan31-15-05-52 2007-01-31 15:24:37.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 7 CORRECT Vector-9 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=110 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0702 s0702-Jan31-15-05-52 2007-01-31 15:24:50.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 INCORRECT 1 "F=E*q" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED Q_PARTICLE)) s0702 s0702-Jan31-15-05-52 2007-01-31 15:24:53.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 2 HINT 1 Normally, this equation is written using an absolute value. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG s0702 s0702-Jan31-15-05-52 2007-01-31 15:25:12.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 3 INCORRECT 1 "|F|=E*q" Syntax error in F =E*q 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG ? s0702 s0702-Jan31-15-05-52 2007-01-31 15:25:24.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 4 INCORRECT 1 "F=|E*q|" Syntax error in F= E*q 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG ? s0702 s0702-Jan31-15-05-52 2007-01-31 15:25:35.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 5 HINT 1 Syntax error in F= E*q 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG s0702 s0702-Jan31-15-05-52 2007-01-31 15:25:38.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 6 HINT The equation or the units in it are not in a recognizable form. 2 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG s0702 s0702-Jan31-15-05-52 2007-01-31 15:25:52.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 7 INCORRECT 1 "F=E*q N" Syntax error in F=E*q N 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 37 ? s0702 s0702-Jan31-15-05-52 2007-01-31 15:25:59.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 8 HINT The equation or the units in it are not in a recognizable form. 2 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG s0702 s0702-Jan31-15-05-52 2007-01-31 15:26:50.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 9 CORRECT 1 "F=E*abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 73 (= Fe_PARTICLE_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED (ABS Q_PARTICLE))) s0702 s0702-Jan31-15-05-52 2007-01-31 15:27:16.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 2 "F" Joint Explanation Experimental s0702 s0702-Jan31-15-05-52 2007-01-31 15:27:27.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 "0.113 N" Joint Explanation Experimental 98 s0702 s0702-Jan31-15-05-52 2007-01-31 15:37:55.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="el";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 s0702 s0702-Jan31-15-05-52 2007-01-31 15:38:20.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-COMPO-FORM-AXES 25 s0702 s0702-Jan31-15-05-52 2007-01-31 15:38:26.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 2 CORRECT System-667 label="el";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY s0702 s0702-Jan31-15-05-52 2007-01-31 15:38:39.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 3 CORRECT System-667 label="el";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY s0702 s0702-Jan31-15-05-52 2007-01-31 15:39:13.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-669 label="mel";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 kg)) s0702 s0702-Jan31-15-05-52 2007-01-31 15:39:40.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-670 label="qel";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 40 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) s0702 s0702-Jan31-15-05-52 2007-01-31 15:40:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=90;mag=117 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 39 s0702 s0702-Jan31-15-05-52 2007-01-31 15:40:33.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 CORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=117 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR s0702 s0702-Jan31-15-05-52 2007-01-31 15:41:01.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 INCORRECT Vector-672 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=NIL;mag=0 Joint Explanation Experimental DRAW-WEIGHT s0702 s0702-Jan31-15-05-52 2007-01-31 15:41:12.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 2 INCORRECT Vector-672 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=NIL;mag=0 Joint Explanation Experimental DRAW-WEIGHT 38 s0702 s0702-Jan31-15-05-52 2007-01-31 15:41:12.0 US/Eastern DELETION ELEC* ELEC1C Vector-672 Delete label=Fg Joint Explanation Experimental s0702 s0702-Jan31-15-05-52 2007-01-31 15:41:27.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 3 CORRECT Vector-673 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=105 Joint Explanation Experimental DRAW-WEIGHT 39 s0702 s0702-Jan31-15-05-52 2007-01-31 15:42:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-674 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=118 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0702 s0702-Jan31-15-05-52 2007-01-31 15:42:29.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 CORRECT 0 "Fg=mel*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) s0702 s0702-Jan31-15-05-52 2007-01-31 15:42:59.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 1 "Fe=E*abs(qel)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 74 (= Fe_ELECTRON_UNSPECIFIED_1 (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON))) s0702 s0702-Jan31-15-05-52 2007-01-31 15:43:22.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 INCORRECT 2 "Fg=-Fe" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Fw_ELECTRON_EARTH_1 (- Fe_ELECTRON_UNSPECIFIED_1)) s0702 s0702-Jan31-15-05-52 2007-01-31 15:43:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 2 CORRECT 2 "Fg=Fe" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) s0702 s0702-Jan31-15-05-52 2007-01-31 15:43:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 2 "Fg=Fe" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) s0702 s0702-Jan31-15-05-52 2007-01-31 15:43:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 2 "Fg=Fe" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) s0702 s0702-Jan31-15-05-52 2007-01-31 15:43:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 2 "Fg=Fe" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) s0702 s0702-Jan31-15-05-52 2007-01-31 15:43:32.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 CORRECT 3 "E" Joint Explanation Experimental s0702 s0702-Jan31-15-05-52 2007-01-31 15:43:48.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 CORRECT Answer-1 "5.58e-11 N/C" Joint Explanation Experimental 99 s0702 s0702-Jan31-15-05-52 2007-01-31 15:58:48.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 CORRECT System-1 label="el";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 s0702 s0702-Jan31-15-05-52 2007-01-31 15:59:07.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT Var-2 label="qel";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19" Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE 12 (= Q_ELECTRON (- 1.5999999999999998e-19)) s0702 s0702-Jan31-15-05-52 2007-01-31 15:59:10.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 HINT Var-1 label=q This equation is dimensionally inconsistent. When numbers are used in equations, they must include the appropriate units. It looks like one of the numbers you've used is lacking the units. 2 2 Joint Explanation Experimental DEFINE-CHARGE s0702 s0702-Jan31-15-05-52 2007-01-31 15:59:23.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 3 CORRECT Var-2 label="qel";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 17 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) s0702 s0702-Jan31-15-05-52 2007-01-31 15:59:41.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 INCORRECT Var-3 label="mel";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11d-31 kg" Syntax error in mel=9.11d-31 kg 1 Joint Explanation Experimental DEFINE-MASS 16 ? s0702 s0702-Jan31-15-05-52 2007-01-31 15:59:58.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 2 CORRECT Var-3 label="mel";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 21 (= m_ELECTRON (DNUM 9.11e-31 kg)) s0702 s0702-Jan31-15-05-52 2007-01-31 16:00:21.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-4 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=140 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR s0702 s0702-Jan31-15-05-52 2007-01-31 16:00:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 0 "E=2.00e4 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 25 (= E_REGION_PLATES (DNUM 20000.0 N/C)) s0702 s0702-Jan31-15-05-52 2007-01-31 16:00:37.0 US/Eastern DELETION ELEC* ELEC3A Var-5 Delete label=NIL Joint Explanation Experimental s0702 s0702-Jan31-15-05-52 2007-01-31 16:01:33.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-6 label="del";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=73 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0702 s0702-Jan31-15-05-52 2007-01-31 16:01:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 1 "del=1.50 cm" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 29 (= s_ELECTRON_12 (DNUM 1.5 cm)) s0702 s0702-Jan31-15-05-52 2007-01-31 16:02:26.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-7 label="Fe";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=92 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0702 s0702-Jan31-15-05-52 2007-01-31 16:02:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 CORRECT 2 "Fe=abs(qel)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 41 (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES)) s0702 s0702-Jan31-15-05-52 2007-01-31 16:03:09.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-8 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=106 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP s0702 s0702-Jan31-15-05-52 2007-01-31 16:03:20.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 3 "a=Fe/mel" Joint Explanation Experimental (= a_ELECTRON_12 (/ Fe_ELECTRON_PLATES_12 m_ELECTRON)) s0702 s0702-Jan31-15-05-52 2007-01-31 16:04:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 CORRECT Vector-9 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=78 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT s0702 s0702-Jan31-15-05-52 2007-01-31 16:04:36.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 INCORRECT 4 "v=.5*a*T1^2" Undefined variable: T1 1 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST s0702 s0702-Jan31-15-05-52 2007-01-31 16:04:36.0 US/Eastern DELETION ELEC* ELEC3A 4 Delete Joint Explanation Experimental s0702 s0702-Jan31-15-05-52 2007-01-31 16:05:23.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 2 INCORRECT Vector-10 label="vo";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=50 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST s0702 s0702-Jan31-15-05-52 2007-01-31 16:05:23.0 US/Eastern DELETION ELEC* ELEC3A Vector-10 Delete label=vo Joint Explanation Experimental s0702 s0702-Jan31-15-05-52 2007-01-31 16:05:50.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 3 CORRECT Vector-11 label="vo";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST s0702 s0702-Jan31-15-05-52 2007-01-31 16:06:17.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 2 TRUE_BUT_IRRELEVANT 4 "v^2=vo^2+2*a*del" Joint Explanation Experimental (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0702 s0702-Jan31-15-05-52 2007-01-31 16:06:24.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 CORRECT 5 "v" Joint Explanation Experimental s0702 s0702-Jan31-15-05-52 2007-01-31 16:06:39.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.03e7 m/s" Joint Explanation Experimental 65 s0702 s0702-Jan31-15-05-52 2007-01-31 16:22:08.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 s0702 s0702-Jan31-15-05-52 2007-01-31 16:22:17.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 25 s0702 s0702-Jan31-15-05-52 2007-01-31 16:22:40.0 US/Eastern ATTEMPT Variable RESULT Unsolicited ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 INCORRECT Var-669 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19" Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE 23 (= Q_ELECTRON (- 1.5999999999999998e-19)) s0702 s0702-Jan31-15-05-52 2007-01-31 16:22:54.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 2 CORRECT Var-669 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 28 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) s0702 s0702-Jan31-15-05-52 2007-01-31 16:23:10.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-670 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 kg)) s0702 s0702-Jan31-15-05-52 2007-01-31 16:23:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-671 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=71 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0702 s0702-Jan31-15-05-52 2007-01-31 16:24:06.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-672 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=90 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR s0702 s0702-Jan31-15-05-52 2007-01-31 16:24:34.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 0 "E=4.00e-12 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 36 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) s0702 s0702-Jan31-15-05-52 2007-01-31 16:25:04.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-673 label="v1";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=67 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT s0702 s0702-Jan31-15-05-52 2007-01-31 16:25:15.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 1 "v1=4.3 m/s" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 39 (= v_ELECTRON_1 (DNUM 4.3 m/s)) s0702 s0702-Jan31-15-05-52 2007-01-31 16:25:47.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-674 label="Fg";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=73 Joint Explanation Experimental DRAW-WEIGHT 40 s0702 s0702-Jan31-15-05-52 2007-01-31 16:26:35.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-675 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=71 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0702 s0702-Jan31-15-05-52 2007-01-31 16:27:01.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 INCORRECT Vector-676 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=75 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN 39 s0702 s0702-Jan31-15-05-52 2007-01-31 16:27:14.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 CORRECT Vector-676 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=75 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN s0702 s0702-Jan31-15-05-52 2007-01-31 16:27:52.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 2 "Fe=E*abs(q)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 51 (= Fe_ELECTRON_UNSPECIFIED_12 (* E_REGION_UNSPECIFIED (ABS Q_ELECTRON))) s0702 s0702-Jan31-15-05-52 2007-01-31 16:28:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 CORRECT 3 "Fg=g*m" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_12 (* g_EARTH m_ELECTRON)) s0702 s0702-Jan31-15-05-52 2007-01-31 16:28:37.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-677 label="Fn";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=270;mag=99 Joint Explanation Experimental DRAW-NET-FORCE-FROM-ACCEL s0702 s0702-Jan31-15-05-52 2007-01-31 16:28:53.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 1 TRUE_BUT_IRRELEVANT 4 "Fn=Fg-Fe" Joint Explanation Experimental (= Fnet_ELECTRON_12 (- Fw_ELECTRON_EARTH_12 Fe_ELECTRON_UNSPECIFIED_12)) s0702 s0702-Jan31-15-05-52 2007-01-31 16:29:08.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 2 TRUE_BUT_IRRELEVANT 5 "a*m=Fn" Joint Explanation Experimental (= (* a_ELECTRON_12 m_ELECTRON) Fnet_ELECTRON_12) s0702 s0702-Jan31-15-05-52 2007-01-31 16:29:50.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-678 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST s0702 s0702-Jan31-15-05-52 2007-01-31 16:30:05.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 2 CORRECT Vector-673 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=67 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT s0702 s0702-Jan31-15-05-52 2007-01-31 16:30:09.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 2 CORRECT 1 "vi=4.3 m/s" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= v_ELECTRON_1 (DNUM 4.3 m/s)) s0702 s0702-Jan31-15-05-52 2007-01-31 16:30:17.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 1 CORRECT 6 "vf=0 m/s" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s)) s0702 s0702-Jan31-15-05-52 2007-01-31 16:30:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 INCORRECT 7 "vf^2=vi^2+2*a*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0702 s0702-Jan31-15-05-52 2007-01-31 16:30:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 INCORRECT 7 "vf^2=vi^2+2*a*d" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0702 s0702-Jan31-15-05-52 2007-01-31 16:30:57.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 INCORRECT 7 "vf^2=vi^2+2*a*d" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0702 s0702-Jan31-15-05-52 2007-01-31 16:31:12.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Vector-671 label="d";type=Displacement;body=electron;agent=NIL;time=T1;dir=90;mag=71 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0702 s0702-Jan31-15-05-52 2007-01-31 16:31:17.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 CORRECT Vector-671 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=71 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0702 s0702-Jan31-15-05-52 2007-01-31 16:31:34.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 3 TRUE_BUT_IRRELEVANT 7 "vf^2=vi^2-2*a*d" Joint Explanation Experimental (= (^ v_ELECTRON_2 2) (- (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0702 s0702-Jan31-15-05-52 2007-01-31 16:32:05.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 2 CORRECT 7 "vi_y=vi" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Yc_v_ELECTRON_1_0 v_ELECTRON_1) s0702 s0702-Jan31-15-05-52 2007-01-31 16:32:17.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 1 CORRECT 8 "vf_y=vf" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Yc_v_ELECTRON_2_0 v_ELECTRON_2) s0702 s0702-Jan31-15-05-52 2007-01-31 16:32:17.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (IMPLICIT-EQN (= v_ELECTRON_2 (DNUM 0 m/s))) 2 CORRECT 8 "vf_y=vf" Joint Explanation Experimental WRITE-IMPLICIT-EQN (= Yc_v_ELECTRON_2_0 v_ELECTRON_2) s0702 s0702-Jan31-15-05-52 2007-01-31 16:32:29.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 4 INCORRECT 9 "a_y=a" Joint Explanation Experimental (= Yc_a_ELECTRON_12_0 a_ELECTRON_12) s0702 s0702-Jan31-15-05-52 2007-01-31 16:32:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 5 TRUE_BUT_IRRELEVANT 9 "a_y=-a" Joint Explanation Experimental (= Yc_a_ELECTRON_12_0 (- a_ELECTRON_12)) s0702 s0702-Jan31-15-05-52 2007-01-31 16:32:59.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 2 CORRECT 10 "vf_y^2=vi_y^2+2*a_y*d" Although equation 11 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-LK-NO-T-COMPO 58 (= (^ Yc_v_ELECTRON_2_0 2) (+ (^ Yc_v_ELECTRON_1_0 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) s0702 s0702-Jan31-15-05-52 2007-01-31 16:32:59.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 2 CORRECT 10 "vf_y^2=vi_y^2+2*a_y*d" Although equation 11 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental COMPO-PARALLEL-AXIS 58 (= (^ Yc_v_ELECTRON_2_0 2) (+ (^ Yc_v_ELECTRON_1_0 2) (* (* 2 Yc_a_ELECTRON_12_0) s_ELECTRON_12))) s0702 s0702-Jan31-15-05-52 2007-01-31 16:33:26.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 3 CORRECT 10 "vf_y^2=vi_y^2+2*a_y*d_y" Joint Explanation Experimental WRITE-LK-NO-T-COMPO 63 (= (^ Yc_v_ELECTRON_2_0 2) (+ (^ Yc_v_ELECTRON_1_0 2) (* (* 2 Yc_a_ELECTRON_12_0) Yc_s_ELECTRON_12_0))) s0702 s0702-Jan31-15-05-52 2007-01-31 16:33:35.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 3 CORRECT 11 "d=d_y" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= s_ELECTRON_12 Yc_s_ELECTRON_12_0) s0702 s0702-Jan31-15-05-52 2007-01-31 16:33:43.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 1 CORRECT 12 "d" Joint Explanation Experimental s0702 s0702-Jan31-15-05-52 2007-01-31 16:33:55.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC6A Answer-1 1 CORRECT Answer-1 "1.02 m" Joint Explanation Experimental 88 s0703 s0703-Feb05-10-09-24 2007-02-05 10:18:00.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (BODY PARTICLE TIME NIL) 1 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Self-explanation Control DRAW-BODY s0703 s0703-Feb05-10-09-24 2007-02-05 10:19:53.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (BODY PARTICLE TIME NIL) 2 INCORRECT 0 "E=14.3e+3" Undefined variable: E 1 Self-explanation Control DRAW-BODY s0703 s0703-Feb05-10-09-24 2007-02-05 10:20:54.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 3 CORRECT System-1 label="P";body=particle;time=NIL Self-explanation Control DRAW-BODY 12 s0703 s0703-Feb05-10-09-24 2007-02-05 10:21:26.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 CORRECT Vector-2 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=141 Self-explanation Control DRAW-FIELD-GIVEN-DIR 13 s0703 s0703-Feb05-10-09-24 2007-02-05 10:21:34.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 INCORRECT 0 "E=14.3e+3" Forgot to put units on a number. 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN 12 (= E_REGION_UNSPECIFIED 14300.0) s0703 s0703-Feb05-10-09-24 2007-02-05 10:21:43.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 2 CORRECT 0 "E=14.3e+3N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 21 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) s0703 s0703-Feb05-10-09-24 2007-02-05 10:21:43.0 US/Eastern DELETION FOR* FOR4C 1 Delete Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:21:43.0 US/Eastern DELETION FOR* FOR4C 2 Delete Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:22:47.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (DRAW-AXES 0) 1 HINT It is now a good idea for you to draw an axis. This will help to ground your work and be useful later on in the process. 1 Self-explanation Control DRAW-UNROTATED-AXES s0703 s0703-Feb05-10-09-24 2007-02-05 10:23:00.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 2 CORRECT Axes-3 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 30 s0703 s0703-Feb05-10-09-24 2007-02-05 10:23:00.0 US/Eastern DELETION FOR* FOR4C System-1 Delete label=P Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:23:18.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (BODY PARTICLE TIME NIL) 4 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Self-explanation Control DRAW-BODY s0703 s0703-Feb05-10-09-24 2007-02-05 10:23:24.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp FOR* FOR4C (BODY PARTICLE TIME NIL) 5 HINT You should use the body tool to draw a body choosing the particle as the body. 2 2 Self-explanation Control DRAW-BODY 15 s0703 s0703-Feb05-10-09-24 2007-02-05 10:23:55.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 6 CORRECT System-4 label="P";body=particle;time=NIL Self-explanation Control DRAW-BODY 25 s0703 s0703-Feb05-10-09-24 2007-02-05 10:24:01.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 HINT Var-5 label=q You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the charge on the particle. 1 Self-explanation Control DEFINE-CHARGE s0703 s0703-Feb05-10-09-24 2007-02-05 10:24:50.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 CORRECT Var-5 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9e-6C" Self-explanation Control DEFINE-CHARGE 33 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) s0703 s0703-Feb05-10-09-24 2007-02-05 10:25:02.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (BODY PARTICLE TIME NIL) 7 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-BODY s0703 s0703-Feb05-10-09-24 2007-02-05 10:25:04.0 US/Eastern CANCEL FOR* FOR4C Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:25:26.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (BODY PARTICLE TIME NIL) 8 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-BODY s0703 s0703-Feb05-10-09-24 2007-02-05 10:25:28.0 US/Eastern CANCEL FOR* FOR4C Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:25:31.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (BODY PARTICLE TIME NIL) 9 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-BODY s0703 s0703-Feb05-10-09-24 2007-02-05 10:25:54.0 US/Eastern CANCEL FOR* FOR4C Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:25:57.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (BODY PARTICLE TIME NIL) 10 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-BODY s0703 s0703-Feb05-10-09-24 2007-02-05 10:26:07.0 US/Eastern CANCEL FOR* FOR4C Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:28:29.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (BODY PARTICLE TIME NIL) 11 INCORRECT 1 "Ex=sin(E)" Undefined variable: Ex 1 Self-explanation Control DRAW-BODY s0703 s0703-Feb05-10-09-24 2007-02-05 10:28:29.0 US/Eastern DELETION FOR* FOR4C 1 Delete Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:28:29.0 US/Eastern DELETION FOR* FOR4C Vector-6 Delete label=NIL Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:30:31.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (BODY PARTICLE TIME NIL) 12 INCORRECT 1 "F=q*E" Undefined variable: F 1 Self-explanation Control DRAW-BODY s0703 s0703-Feb05-10-09-24 2007-02-05 10:30:31.0 US/Eastern DELETION FOR* FOR4C 1 Delete Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:30:51.0 US/Eastern ATTEMPT Body RESULT FOR* FOR4C (BODY PARTICLE TIME NIL) 13 CORRECT System-4 label="P";body=particle;time=NIL Self-explanation Control DRAW-BODY s0703 s0703-Feb05-10-09-24 2007-02-05 10:30:53.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 1 HINT Vector-4 label=F Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:31:18.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 2 HINT #.(wb-quant '(define-variable "F" |Electric| |force| |particle| |T0| |Unspecified| NIL "") 'mag) Right. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:32:18.0 US/Eastern CANCEL FOR* FOR4C Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:32:18.0 US/Eastern DELETION FOR* FOR4C Var-7 Delete label=NIL Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:33:11.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FORCE PARTICLE UNSPECIFIED ELECTRIC TIME 1) (DNUM 202 deg)) 3 CORRECT Vector-8 label="F";type=Force;body=particle;agent=Unspecified;forcetype=Electric;time=T0;dir=202;mag=80 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:33:21.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 1 INCORRECT 1 "F=q*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* Q_PARTICLE E_REGION_UNSPECIFIED)) s0703 s0703-Feb05-10-09-24 2007-02-05 10:34:05.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 2 INCORRECT 1 "F=q*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG (= Fe_PARTICLE_UNSPECIFIED_1 (* Q_PARTICLE E_REGION_UNSPECIFIED)) s0703 s0703-Feb05-10-09-24 2007-02-05 10:34:13.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 3 HINT 1 Normally, this equation is written using an absolute value. 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG s0703 s0703-Feb05-10-09-24 2007-02-05 10:34:24.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED))) 4 CORRECT 1 "F=abs q*E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 67 (= Fe_PARTICLE_UNSPECIFIED_1 (* (ABS Q_PARTICLE) E_REGION_UNSPECIFIED)) s0703 s0703-Feb05-10-09-24 2007-02-05 10:34:30.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp FOR* FOR4C CALC_REQUEST 1 HINT You have completed all of the principle applications necessary to solve this problem. Right click in the first empty line in the equation pane and use 'Solve For...' to find a value for the sought quantity (if you have not already) and then enter that value in the answer box. 1 1 Self-explanation Control 62 s0703 s0703-Feb05-10-09-24 2007-02-05 10:34:42.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 2 CORRECT 2 "F" Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:34:51.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 "0.113N" Self-explanation Control 87 s0703 s0703-Feb05-10-09-24 2007-02-05 10:46:18.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="E";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 s0703 s0703-Feb05-10-09-24 2007-02-05 10:46:28.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-COMPO-FORM-AXES 25 s0703 s0703-Feb05-10-09-24 2007-02-05 10:47:37.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-669 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31kg" Self-explanation Control DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 kg)) s0703 s0703-Feb05-10-09-24 2007-02-05 10:48:03.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-670 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.6e-19C" Self-explanation Control DEFINE-CHARGE 40 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) s0703 s0703-Feb05-10-09-24 2007-02-05 10:48:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 CORRECT Vector-671 label="F";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=159 Self-explanation Control DRAW-WEIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 10:48:40.0 US/Eastern DELETION ELEC* ELEC1C Vector-672 Delete label=NIL Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:49:05.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT Vector-673 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=90;mag=161 Self-explanation Control DRAW-FIELD-GIVEN-DIR 39 s0703 s0703-Feb05-10-09-24 2007-02-05 10:49:12.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 HINT Vector-673 label=E Do you really want the direction of that vector to be 90 degrees? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:49:44.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 INCORRECT Vector-673 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=90;mag=161 Self-explanation Control DRAW-FIELD-GIVEN-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:49:44.0 US/Eastern DELETION ELEC* ELEC1C Vector-673 Delete label=E Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:50:45.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 INCORRECT Vector-674 label="FE";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=270;mag=120 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 38 s0703 s0703-Feb05-10-09-24 2007-02-05 10:50:49.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 4 HINT Vector-674 label=FE Do you really want the direction of that vector to be 270 degrees? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:50:53.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 5 HINT Think about how the direction of the electric force on the electron due to an unspecified agent is related to the direction of the electric field vector. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:50:53.0 US/Eastern DELETION ELEC* ELEC1C Vector-674 Delete label=FE Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:51:17.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 6 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:51:34.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 7 HINT #.(wb-quant '(define-variable "E" |NIL| |E-field| |region| |NIL| |earth| NIL "") 'mag) That quantity is not mentioned in the Andes solution. 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:51:50.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 8 HINT #.(wb-quant '(define-variable "E" |NIL| |E-field| |region| |NIL| |electron| NIL "") 'mag) That quantity is not mentioned in the Andes solution. 3 Self-explanation Control DRAW-FIELD-GIVEN-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:52:31.0 US/Eastern CANCEL ELEC* ELEC1C Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:53:14.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 9 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-FIELD-GIVEN-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:53:32.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 10 HINT #.(wb-quant '(define-variable "E" |NIL| |E-field| |region| |NIL| |Unspecified| NIL "") 'dir) That quantity is not mentioned in the Andes solution. 2 Self-explanation Control DRAW-FIELD-GIVEN-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:53:40.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 11 HINT #.(wb-quant '(define-variable "E" |NIL| |E-field| |region| |NIL| |Unspecified| NIL "") 'mag) Yes. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 3 Self-explanation Control DRAW-FIELD-GIVEN-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:54:26.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 12 HINT charge-force-efield-mag Yep. You should be introducing a variable for the magnitude of the electric field at the region due to an unspecified agent. 4 Self-explanation Control DRAW-FIELD-GIVEN-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:54:34.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 13 HINT You can determine the direction of the electric field at the region due to an unspecified agent from the problem statement 5 Self-explanation Control DRAW-FIELD-GIVEN-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:54:48.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 14 HINT Use the electric field drawing tool to draw the electric field at the region due to an unspecified agent in the given direction of 270 degrees. 6 6 Self-explanation Control DRAW-FIELD-GIVEN-DIR 33 s0703 s0703-Feb05-10-09-24 2007-02-05 10:55:13.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 15 CORRECT Vector-675 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=144 Self-explanation Control DRAW-FIELD-GIVEN-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:55:23.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 2 HINT Why don't you continue with the solution by working on applying the definition of electric field magnitude at the electron at T0. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:55:23.0 US/Eastern DELETION ELEC* ELEC1C Var-676 Delete label=NIL Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:55:23.0 US/Eastern DELETION ELEC* ELEC1C Var-677 Delete label=NIL Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 10:56:09.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 3 HINT Why don't you continue working on applying the definition of electric field magnitude at the electron at T0. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:56:13.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 4 HINT A good step would be introducing a variable for the magnitude of the electric force on the electron at T0 due to an unspecified agent. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:56:20.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 5 HINT Think about how the direction of the electric force on the electron due to an unspecified agent is related to the direction of the electric field vector. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:56:26.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 6 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 4 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:57:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 7 HINT Because the charge of the electron is negative, use the force drawing tool (labeled F) to draw the electric force on the electron due to an unspecified agent in the opposite direction as the electric field at that location, namely 90 degrees. 5 5 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 28 s0703 s0703-Feb05-10-09-24 2007-02-05 10:57:52.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 8 CORRECT Vector-678 label="Fy";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=119 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 10:57:56.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 HINT 0 Why don't you continue working on applying the definition of electric field magnitude at the electron at T0. 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG s0703 s0703-Feb05-10-09-24 2007-02-05 10:58:38.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 2 HINT 0 What is the relationship between the force, the charge and the electric field? 2 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG s0703 s0703-Feb05-10-09-24 2007-02-05 10:58:41.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 3 HINT 0 The electric field vector at a location is defined as electric force vector per unit charge. That is, the electric force vector that a test charge would undergo if placed there, divided by the size of the charge. This definition can be applied to relate force and field magnitudes. 3 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG s0703 s0703-Feb05-10-09-24 2007-02-05 10:58:58.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 4 HINT 0 Write the equation Fy = (ABS q) * E 4 4 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 23 s0703 s0703-Feb05-10-09-24 2007-02-05 10:59:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 5 CORRECT 0 "Fy=(abs q) * E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 59 (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) s0703 s0703-Feb05-10-09-24 2007-02-05 10:59:27.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 1 HINT Why don't you continue with the solution by working on applying Newton's second law to the electron at T0. 1 Self-explanation Control ACCEL-AT-REST s0703 s0703-Feb05-10-09-24 2007-02-05 10:59:29.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 2 HINT Notice that the electron is at rest at T0. 2 Self-explanation Control ACCEL-AT-REST s0703 s0703-Feb05-10-09-24 2007-02-05 10:59:32.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 3 HINT If a body is at rest throughout some time interval, its average acceleration during that interval is zero. 3 Self-explanation Control ACCEL-AT-REST s0703 s0703-Feb05-10-09-24 2007-02-05 10:59:36.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 4 HINT Because the electron is at rest at T0, use the acceleration tool to draw a zero-length acceleration vector for it. 4 4 Self-explanation Control ACCEL-AT-REST 54 s0703 s0703-Feb05-10-09-24 2007-02-05 11:00:10.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (ACCEL ELECTRON TIME 1) ZERO) 5 CORRECT Vector-679 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Self-explanation Control ACCEL-AT-REST s0703 s0703-Feb05-10-09-24 2007-02-05 11:00:16.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 1 HINT 1 Why don't you continue working on applying Newton's second law to the electron at T0. 1 Self-explanation Control WRITE-NFL-COMPO s0703 s0703-Feb05-10-09-24 2007-02-05 11:00:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 2 HINT 1 You can apply Newton's second law to the electron. Note that the electron is not accelerating at T0. 2 Self-explanation Control WRITE-NFL-COMPO s0703 s0703-Feb05-10-09-24 2007-02-05 11:00:21.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 3 HINT 1 Newton's second law F = m*a states that the net force on an object = the object's mass times its acceleration. In this case the acceleration is zero so you know the sum of all forces on the object must be zero. This vector principle can be applied component-wise to require that the force components in any direction sum to zero. 3 Self-explanation Control WRITE-NFL-COMPO s0703 s0703-Feb05-10-09-24 2007-02-05 11:00:29.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 4 HINT 1 Because the electron is not accelerating at T0, write Newton's second law as F_y + Fy_y = 0 4 4 Self-explanation Control WRITE-NFL-COMPO 49 s0703 s0703-Feb05-10-09-24 2007-02-05 11:01:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0)) 5 CORRECT 1 "F_y+Fy_y=0" Self-explanation Control WRITE-NFL-COMPO (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) 0) s0703 s0703-Feb05-10-09-24 2007-02-05 11:01:06.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the electric force on the electron at T0 due to an unspecified agent onto the y axis. 1 Self-explanation Control COMPO-PARALLEL-AXIS s0703 s0703-Feb05-10-09-24 2007-02-05 11:01:12.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 2 HINT Since the electric force on the electron at T0 due to an unspecified agent at T0 lies along the y axis, it has a non-zero component along that axis. 2 Self-explanation Control COMPO-PARALLEL-AXIS s0703 s0703-Feb05-10-09-24 2007-02-05 11:01:18.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Self-explanation Control COMPO-PARALLEL-AXIS s0703 s0703-Feb05-10-09-24 2007-02-05 11:01:18.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 4 HINT Since the electric force on the electron at T0 due to an unspecified agent at T0 lies along the y axis and points in the + y direction, write the equation Fy_y = Fy. 4 4 Self-explanation Control COMPO-PARALLEL-AXIS 44 s0703 s0703-Feb05-10-09-24 2007-02-05 11:01:41.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 5 CORRECT 2 "Fy_y=Fy" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 Fe_ELECTRON_UNSPECIFIED_1) s0703 s0703-Feb05-10-09-24 2007-02-05 11:01:44.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the weight force on the electron at T0 due to the earth onto the y axis. 1 Self-explanation Control COMPO-PARALLEL-AXIS s0703 s0703-Feb05-10-09-24 2007-02-05 11:01:46.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 2 HINT Since the weight force on the electron at T0 due to the earth at T0 lies along the y axis, it has a non-zero component along that axis. 2 Self-explanation Control COMPO-PARALLEL-AXIS s0703 s0703-Feb05-10-09-24 2007-02-05 11:01:47.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Self-explanation Control COMPO-PARALLEL-AXIS s0703 s0703-Feb05-10-09-24 2007-02-05 11:01:47.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 4 HINT Since the weight force on the electron at T0 due to the earth at T0 lies along the y axis and points in the - y direction, write the equation F_y = - F. 4 4 Self-explanation Control COMPO-PARALLEL-AXIS 39 s0703 s0703-Feb05-10-09-24 2007-02-05 11:02:10.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 5 CORRECT 3 "F_y=-F" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1)) s0703 s0703-Feb05-10-09-24 2007-02-05 11:02:22.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 HINT Why don't you continue with the solution by working on applying the Weight law on the electron. 1 Self-explanation Control WT-LAW s0703 s0703-Feb05-10-09-24 2007-02-05 11:02:24.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 2 HINT Try applying the weight law. 2 Self-explanation Control WT-LAW s0703 s0703-Feb05-10-09-24 2007-02-05 11:02:25.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 3 HINT The weight law for a body is W=m*g, where W is the magnitude of the weight force acting on the body, m is the body's mass and g is the gravitational acceleration at the surface of the planet. 3 Self-explanation Control WT-LAW s0703 s0703-Feb05-10-09-24 2007-02-05 11:02:27.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 4 HINT Write F=m*g 4 4 Self-explanation Control WT-LAW 34 s0703 s0703-Feb05-10-09-24 2007-02-05 11:02:37.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 5 CORRECT 4 "F=m*g" Self-explanation Control WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) s0703 s0703-Feb05-10-09-24 2007-02-05 11:02:44.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC1C CALC_REQUEST 1 HINT You have completed all of the principle applications necessary to solve this problem. Right click in the first empty line in the equation pane and use 'Solve For...' to find a value for the sought quantity (if you have not already) and then enter that value in the answer box. 1 1 Self-explanation Control 29 s0703 s0703-Feb05-10-09-24 2007-02-05 11:03:00.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 2 CORRECT 5 "F" Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:03:18.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 3 CORRECT 6 "F_y" Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:03:33.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 4 CORRECT 7 "E" Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:03:49.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 INCORRECT Answer-1 "5.580N/C" Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:04:06.0 US/Eastern ATTEMPT Answer RESULT Unsolicited ELEC* ELEC1C Answer-1 2 INCORRECT Answer-1 "8.928e-30N" Units are inconsistent. 1 1 Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:04:25.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 3 CORRECT Answer-1 "5.580e-11N/C" Self-explanation Control 51 s0703 s0703-Feb05-10-09-24 2007-02-05 11:18:18.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-1 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=64 Self-explanation Control DRAW-FIELD-GIVEN-DIR 5 s0703 s0703-Feb05-10-09-24 2007-02-05 11:18:32.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 0 "E=2.00e+4 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 9 (= E_REGION_PLATES (DNUM 20000.0 N/C)) s0703 s0703-Feb05-10-09-24 2007-02-05 11:18:32.0 US/Eastern DELETION ELEC* ELEC3A Vector-2 Delete label=NIL Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:20:14.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 INCORRECT Vector-3 label="v";type=Velocity;body=electron;agent=average;time=T0 to T1;dir=90;mag=100 Self-explanation Control DRAW-VELOCITY-STRAIGHT 7 s0703 s0703-Feb05-10-09-24 2007-02-05 11:20:22.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 HINT Vector-3 label=v You don't need to draw the velocity from T0 to T1. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-BODY s0703 s0703-Feb05-10-09-24 2007-02-05 11:20:22.0 US/Eastern DELETION ELEC* ELEC3A Vector-3 Delete label=v Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:21:03.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (BODY ELECTRON TIME NIL) 2 HINT It is a good idea to begin any problem by enumerating the bodies at work within it. Doing so helps to frame later principle applications. Why don't you do so now. 1 Self-explanation Control DRAW-BODY s0703 s0703-Feb05-10-09-24 2007-02-05 11:21:13.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (BODY ELECTRON TIME NIL) 3 HINT You should use the body tool to draw a body choosing the electron as the body. 2 2 Self-explanation Control DRAW-BODY 2 s0703 s0703-Feb05-10-09-24 2007-02-05 11:21:31.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 4 CORRECT System-4 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 12 s0703 s0703-Feb05-10-09-24 2007-02-05 11:21:50.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 2 INCORRECT Vector-5 label="v";type=Velocity;body=electron;agent=average;time=T0 to T1;dir=90;mag=125 Self-explanation Control DRAW-VELOCITY-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:21:50.0 US/Eastern DELETION ELEC* ELEC3A Vector-5 Delete label=v Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:22:20.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 5 CORRECT System-4 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY s0703 s0703-Feb05-10-09-24 2007-02-05 11:22:47.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-6 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.6e-19 C" Self-explanation Control DEFINE-CHARGE 16 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) s0703 s0703-Feb05-10-09-24 2007-02-05 11:23:12.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-7 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 20 (= m_ELECTRON (DNUM 9.11e-31 kg)) s0703 s0703-Feb05-10-09-24 2007-02-05 11:23:47.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (DRAW-AXES 0) 1 HINT Vector-2 label=F It is now a good idea for you to draw an axis. This will help to ground your work and be useful later on in the process. 1 Self-explanation Control DRAW-UNROTATED-AXES s0703 s0703-Feb05-10-09-24 2007-02-05 11:24:04.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC3A (DRAW-AXES 0) 2 CORRECT Axes-8 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 30 s0703 s0703-Feb05-10-09-24 2007-02-05 11:24:25.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 3 INCORRECT Vector-9 label="v";type=Velocity;body=electron;agent=average;time=T0 to T1;dir=90;mag=88 Self-explanation Control DRAW-VELOCITY-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:24:30.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Vector-9 label=v You don't need to draw the velocity from T0 to T1. You need to draw it for a different time. However, you can't know what time is right without have an overall plan for solving the problem. To get one, click on the light bulb button. 1 Self-explanation Control DRAW-ACCEL-SPEED-UP s0703 s0703-Feb05-10-09-24 2007-02-05 11:24:30.0 US/Eastern DELETION ELEC* ELEC3A Vector-9 Delete label=v Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:24:54.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT Vector-10 label="a";type=Acceleration;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-ACCEL-SPEED-UP 29 s0703 s0703-Feb05-10-09-24 2007-02-05 11:24:57.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Vector-10 label=a Both the time specification and the direction of that vector look odd to me. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:25:02.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Whats-Wrong ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT None of the solutions that I know of contain a vector for the accel at that time or in that direction. 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:25:02.0 US/Eastern DELETION ELEC* ELEC3A Vector-10 Delete label=a Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:25:13.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT You should finish entering all of the useful given quantities in the problem. Why don't you work on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:25:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Try introducing a variable for the magnitude of the displacement of the electron from T0 to T1. 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:25:26.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT Notice that the electron is moving in a straight line from T0 to T1. 3 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:25:28.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT Whenever an object is moving in a straight line over a time interval, it has a displacement which is parallel to the direction of motion. 4 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:25:31.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 HINT Because the electron is moving in a straight line from T0 to T1, use the displacement tool to draw a displacement vector for it in direction 90 degrees 5 5 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 24 s0703 s0703-Feb05-10-09-24 2007-02-05 11:25:54.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 CORRECT Vector-11 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=100 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 25 s0703 s0703-Feb05-10-09-24 2007-02-05 11:26:05.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 HINT Why don't you continue working on entering the given value of the magnitude of the displacement of the electron from T0 to T1. 1 Self-explanation Control WRITE-KNOWN-VALUE-EQN s0703 s0703-Feb05-10-09-24 2007-02-05 11:26:07.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 2 HINT You can find the value of the magnitude of the displacement of the electron from T0 to T1 in the problem statement. 2 Self-explanation Control WRITE-KNOWN-VALUE-EQN s0703 s0703-Feb05-10-09-24 2007-02-05 11:26:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 3 HINT The value of the magnitude of the displacement of the electron from T0 to T1 is given as 0.015 m. 3 Self-explanation Control WRITE-KNOWN-VALUE-EQN s0703 s0703-Feb05-10-09-24 2007-02-05 11:26:12.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 4 HINT Enter the equation d = 0.015 m. 4 4 Self-explanation Control WRITE-KNOWN-VALUE-EQN 20 s0703 s0703-Feb05-10-09-24 2007-02-05 11:26:25.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 5 CORRECT 1 "d=0.015 m" Self-explanation Control WRITE-KNOWN-VALUE-EQN 23 (= s_ELECTRON_12 (DNUM 0.015 m)) s0703 s0703-Feb05-10-09-24 2007-02-05 11:26:27.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 4 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:26:31.0 US/Eastern CANCEL ELEC* ELEC3A Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:27:05.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 5 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:27:17.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 6 HINT #.(wb-quant '(define-variable "F" |Electric| |force| |electron| |T0 to T1| |plates| NIL "") 'mag) That quantity is not sought by the problem statement. 2 Self-explanation Control DRAW-VELOCITY-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:27:32.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 7 HINT #.(wb-quant '(define-variable "F" |Electric| |force| |electron| |T0 to T1| |electron| NIL "") 'mag) That quantity is not mentioned in the Andes solution. 3 Self-explanation Control DRAW-VELOCITY-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:27:56.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 8 HINT #.(wb-quant '(define-variable "v" |instantaneous| |velocity| |electron| |T1| |NIL| NIL "") 'mag) Yep. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 4 Self-explanation Control DRAW-VELOCITY-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:29:43.0 US/Eastern CANCEL ELEC* ELEC3A Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:30:07.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 9 CORRECT Vector-12 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=52 Self-explanation Control DRAW-VELOCITY-STRAIGHT 24 s0703 s0703-Feb05-10-09-24 2007-02-05 11:30:36.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 10 INCORRECT 2 "v=d/s" Undefined variable: s 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT 23 s0703 s0703-Feb05-10-09-24 2007-02-05 11:30:45.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 11 HINT Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-VELOCITY-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:30:57.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 12 HINT #.(wb-quant '(define-variable "v" |instantaneous| |velocity| |electron| |T1| |NIL| NIL "") 'mag) Correct. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 2 Self-explanation Control DRAW-VELOCITY-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:33:39.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 13 HINT (lk-no-t ((?axis . y))) Good! A good step would be choosing a particular kinematic equation containing the y component of the velocity of the electron at T1. 3 Self-explanation Control DRAW-VELOCITY-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:33:46.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 14 HINT A good step would be drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 4 Self-explanation Control DRAW-VELOCITY-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:33:46.0 US/Eastern DELETION ELEC* ELEC3A Vector-13 Delete label=NIL Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:34:30.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 15 CORRECT Vector-12 label="v_y";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=52 Self-explanation Control DRAW-VELOCITY-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 11:34:38.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 16 CORRECT Vector-12 label="v_y";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=52 Self-explanation Control DRAW-VELOCITY-STRAIGHT 24 s0703 s0703-Feb05-10-09-24 2007-02-05 11:34:38.0 US/Eastern DELETION ELEC* ELEC3A Vector-14 Delete label=NIL Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:35:10.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 1) ZERO) 1 CORRECT Vector-15 label="v_0";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST s0703 s0703-Feb05-10-09-24 2007-02-05 11:36:30.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 1 CORRECT 2 "v_0=0" Self-explanation Control WRITE-IMPLICIT-EQN (= v_ELECTRON_1 0) s0703 s0703-Feb05-10-09-24 2007-02-05 11:36:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 6 CORRECT 3 "d_y=0.015 m" Self-explanation Control WRITE-KNOWN-VALUE-EQN (= Yc_s_ELECTRON_12_0 (DNUM 0.015 m)) s0703 s0703-Feb05-10-09-24 2007-02-05 11:36:45.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 CORRECT 3 "d_y=0.015 m" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_s_ELECTRON_12_0 (DNUM 0.015 m)) s0703 s0703-Feb05-10-09-24 2007-02-05 11:36:50.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s))) 2 CORRECT 2 "v_0=0 m/s" Self-explanation Control WRITE-IMPLICIT-EQN (= v_ELECTRON_1 (DNUM 0 m/s)) s0703 s0703-Feb05-10-09-24 2007-02-05 11:36:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 7 CORRECT 3 "d_y=0.015 m" Self-explanation Control WRITE-KNOWN-VALUE-EQN (= Yc_s_ELECTRON_12_0 (DNUM 0.015 m)) s0703 s0703-Feb05-10-09-24 2007-02-05 11:36:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 2 CORRECT 3 "d_y=0.015 m" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_s_ELECTRON_12_0 (DNUM 0.015 m)) s0703 s0703-Feb05-10-09-24 2007-02-05 11:37:13.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Why don't you continue with the solution by working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Self-explanation Control DRAW-ACCEL-SPEED-UP s0703 s0703-Feb05-10-09-24 2007-02-05 11:38:06.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Self-explanation Control DRAW-ACCEL-SPEED-UP s0703 s0703-Feb05-10-09-24 2007-02-05 11:38:09.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT Your goal should be choosing a particular kinematic equation containing the y component of the velocity of the electron at T1. 2 Self-explanation Control DRAW-ACCEL-SPEED-UP s0703 s0703-Feb05-10-09-24 2007-02-05 11:38:11.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT Try drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 3 Self-explanation Control DRAW-ACCEL-SPEED-UP s0703 s0703-Feb05-10-09-24 2007-02-05 11:38:12.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 HINT Notice that the electron is moving in a straight line and speeding up from T0 to T1 4 Self-explanation Control DRAW-ACCEL-SPEED-UP s0703 s0703-Feb05-10-09-24 2007-02-05 11:38:14.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG MINILESSON ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 HINT mini_speedup_accel.htm 5 5 Self-explanation Control DRAW-ACCEL-SPEED-UP s0703 s0703-Feb05-10-09-24 2007-02-05 11:38:23.0 US/Eastern HINT_REQUEST Choose- HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 HINT close-lesson Do you wish for more hints? 6 Self-explanation Control DRAW-ACCEL-SPEED-UP s0703 s0703-Feb05-10-09-24 2007-02-05 11:38:26.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 10 HINT Because the electron is speeding up while moving in a straight line with direction 90 degrees, you should use the acceleration tool to draw an acceleration for it from T0 to T1 at direction 90 degrees. 7 7 Self-explanation Control DRAW-ACCEL-SPEED-UP 19 s0703 s0703-Feb05-10-09-24 2007-02-05 11:38:50.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 11 CORRECT Vector-16 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=71 Self-explanation Control DRAW-ACCEL-SPEED-UP s0703 s0703-Feb05-10-09-24 2007-02-05 11:39:04.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 12 CORRECT Vector-16 label="a_y";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=71 Self-explanation Control DRAW-ACCEL-SPEED-UP s0703 s0703-Feb05-10-09-24 2007-02-05 11:39:33.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 HINT Why don't you continue working on writing the constant acceleration equation v_y^2 = v0_y^2 + 2*a_y*d_y for the electron from T0 to T1. 1 Self-explanation Control WRITE-LK-NO-T-COMPO s0703 s0703-Feb05-10-09-24 2007-02-05 11:39:38.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 2 HINT Your goal should be writing a constant acceleration equation in terms of vector components along the Y axis. 2 Self-explanation Control WRITE-LK-NO-T-COMPO s0703 s0703-Feb05-10-09-24 2007-02-05 11:39:40.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 3 HINT Do you know an equation relating the components of initial velocity, final velocity, acceleration, and displacement when acceleration is constant? 3 Self-explanation Control WRITE-LK-NO-T-COMPO s0703 s0703-Feb05-10-09-24 2007-02-05 11:39:41.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 4 HINT Write the equation v_y_y ^ 2 = 0 + (2 * a_y_y * d_y) 4 4 Self-explanation Control WRITE-LK-NO-T-COMPO 14 s0703 s0703-Feb05-10-09-24 2007-02-05 11:40:21.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 5 CORRECT 5 "v_y_y^2=0+(2*a_y_y*d_y)" Self-explanation Control WRITE-LK-NO-T-COMPO 26 (= (^ Yc_v_ELECTRON_2_0 2) (+ 0 (* (* 2 Yc_a_ELECTRON_12_0) Yc_s_ELECTRON_12_0))) s0703 s0703-Feb05-10-09-24 2007-02-05 11:40:35.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Why don't you continue with the solution by working on applying Newton's second law to the electron from T0 to T1. 1 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 11:40:38.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 HINT Your goal should be drawing a free-body diagram for the electron from T0 to T1. 2 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 11:40:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT A good step would be drawing all the forces acting on the electron from T0 to T1. 3 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 11:40:42.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Think about how the direction of the electric force on the electron due to the plates is related to the direction of the electric field vector. 4 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 11:40:44.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT The electric field vector points in the same direction as the electric force experienced by a positive charge, or in the opposite direction for a negative charge. 5 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 11:40:53.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT Because the charge of the electron is negative, use the force drawing tool (labeled F) to draw the electric force on the electron due to the plates in the opposite direction as the electric field at that location, namely 90 degrees. 6 6 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 21 s0703 s0703-Feb05-10-09-24 2007-02-05 11:41:26.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 7 CORRECT Vector-17 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=83 Self-explanation Control DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 11:42:05.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 1 INCORRECT 6 "F=m*d" Units are inconsistent. 1 1 Self-explanation Control WRITE-NSL-COMPO (= Fe_ELECTRON_PLATES_12 (* m_ELECTRON s_ELECTRON_12)) s0703 s0703-Feb05-10-09-24 2007-02-05 11:42:15.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 2 HINT Why don't you continue working on applying Newton's second law to the electron from T0 to T1. 1 Self-explanation Control WRITE-NSL-COMPO s0703 s0703-Feb05-10-09-24 2007-02-05 11:42:15.0 US/Eastern DELETION ELEC* ELEC3A 6 Delete Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:42:17.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 3 HINT You can apply Newton's second law to the electron. Note that the electron is accelerating from T0 to T1. 2 Self-explanation Control WRITE-NSL-COMPO s0703 s0703-Feb05-10-09-24 2007-02-05 11:42:18.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 4 HINT Newton's second law F = m*a states that the net force on an object = the object's mass times its acceleration. Because the net force is the vector sum of all forces on the object, this can be applied component-wise to relate the sum of the force components in any direction to the mass times the component of acceleration in that direction. 3 Self-explanation Control WRITE-NSL-COMPO s0703 s0703-Feb05-10-09-24 2007-02-05 11:42:31.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 5 INCORRECT 6 "F=m*a" Undefined variable: a 1 Self-explanation Control WRITE-NSL-COMPO s0703 s0703-Feb05-10-09-24 2007-02-05 11:42:55.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 6 HINT Why don't you continue working on applying Newton's second law to the electron from T0 to T1. 1 Self-explanation Control WRITE-NSL-COMPO s0703 s0703-Feb05-10-09-24 2007-02-05 11:42:57.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 7 HINT You can apply Newton's second law to the electron. Note that the electron is accelerating from T0 to T1. 2 Self-explanation Control WRITE-NSL-COMPO s0703 s0703-Feb05-10-09-24 2007-02-05 11:42:58.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 8 HINT Newton's second law F = m*a states that the net force on an object = the object's mass times its acceleration. Because the net force is the vector sum of all forces on the object, this can be applied component-wise to relate the sum of the force components in any direction to the mass times the component of acceleration in that direction. 3 Self-explanation Control WRITE-NSL-COMPO s0703 s0703-Feb05-10-09-24 2007-02-05 11:43:15.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 9 HINT Write Newton's second law in terms of component variables along the y axis as F_y = m * a_y_y 4 4 Self-explanation Control WRITE-NSL-COMPO 15 s0703 s0703-Feb05-10-09-24 2007-02-05 11:43:35.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 10 CORRECT 6 "F_y=m*a_y_y" Self-explanation Control WRITE-NSL-COMPO 27 (= Yc_Fe_ELECTRON_PLATES_12_0 (* m_ELECTRON Yc_a_ELECTRON_12_0)) s0703 s0703-Feb05-10-09-24 2007-02-05 11:43:39.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 HINT Why don't you continue with the solution by working on applying the definition of electric field magnitude at the electron from T0 to T1. 1 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG s0703 s0703-Feb05-10-09-24 2007-02-05 11:43:41.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 2 HINT What is the relationship between the force, the charge and the electric field? 2 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG s0703 s0703-Feb05-10-09-24 2007-02-05 11:43:42.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 3 HINT The electric field vector at a location is defined as electric force vector per unit charge. That is, the electric force vector that a test charge would undergo if placed there, divided by the size of the charge. This definition can be applied to relate force and field magnitudes. 3 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG s0703 s0703-Feb05-10-09-24 2007-02-05 11:43:42.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 4 HINT Write the equation F = (ABS q) * E 4 4 Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 22 s0703 s0703-Feb05-10-09-24 2007-02-05 11:43:55.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 5 CORRECT 7 "F=(abs q) * E" Self-explanation Control WRITE-CHARGE-FORCE-EFIELD-MAG 34 (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES)) s0703 s0703-Feb05-10-09-24 2007-02-05 11:44:03.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 CORRECT 8 "F" Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:44:13.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 2 INCORRECT 9 "F_y" Unable to solve for F_y. Try the light-bulb if you need a hint about a step that still needs to be done. 1 1 Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:44:17.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the velocity of the electron at T1 onto the y axis. 1 Self-explanation Control COMPO-PARALLEL-AXIS s0703 s0703-Feb05-10-09-24 2007-02-05 11:44:20.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 2 HINT Since the velocity of the electron at T1 at T1 lies along the y axis and points in the + y direction, write the equation v_y_y = v_y. 4 4 Self-explanation Control COMPO-PARALLEL-AXIS 29 s0703 s0703-Feb05-10-09-24 2007-02-05 11:44:20.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 3 HINT Since the velocity of the electron at T1 at T1 lies along the y axis, it has a non-zero component along that axis. 2 Self-explanation Control COMPO-PARALLEL-AXIS s0703 s0703-Feb05-10-09-24 2007-02-05 11:44:20.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 4 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Self-explanation Control COMPO-PARALLEL-AXIS s0703 s0703-Feb05-10-09-24 2007-02-05 11:44:34.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_v_ELECTRON_2_0 (+ v_ELECTRON_2))) 5 CORRECT 9 "v_y_y=v_y" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_v_ELECTRON_2_0 v_ELECTRON_2) s0703 s0703-Feb05-10-09-24 2007-02-05 11:44:41.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 1 HINT Why don't you continue with the solution by working on writing the projection equation for the electric force on the electron from T0 to T1 due to the plates onto the y axis. 1 Self-explanation Control COMPO-PARALLEL-AXIS s0703 s0703-Feb05-10-09-24 2007-02-05 11:44:42.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 2 HINT Since the electric force on the electron from T0 to T1 due to the plates from T0 to T1 lies along the y axis, it has a non-zero component along that axis. 2 Self-explanation Control COMPO-PARALLEL-AXIS s0703 s0703-Feb05-10-09-24 2007-02-05 11:44:42.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 3 HINT You can use general projection equations that will work in all cases, but when a vector V lies along an axis x, the component of the vector V_x along the axis is simply equal to plus or minus the magnitude of the vector: V_x = +/- V. The sign is positive if the vector points in the positive axis direction, and negative otherwise. 3 Self-explanation Control COMPO-PARALLEL-AXIS s0703 s0703-Feb05-10-09-24 2007-02-05 11:44:43.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 4 HINT Since the electric force on the electron from T0 to T1 due to the plates from T0 to T1 lies along the y axis and points in the + y direction, write the equation F_y = F. 4 4 Self-explanation Control COMPO-PARALLEL-AXIS 24 s0703 s0703-Feb05-10-09-24 2007-02-05 11:44:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Yc_Fe_ELECTRON_PLATES_12_0 (+ Fe_ELECTRON_PLATES_12))) 5 CORRECT 10 "F_y=F" Self-explanation Control COMPO-PARALLEL-AXIS (= Yc_Fe_ELECTRON_PLATES_12_0 Fe_ELECTRON_PLATES_12) s0703 s0703-Feb05-10-09-24 2007-02-05 11:44:51.0 US/Eastern DELETION ELEC* ELEC3A 4 Delete Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:45:24.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= (+ Yc_Fe_ELECTRON_PLATES_12_0) (* m_ELECTRON Yc_a_ELECTRON_12_0))) 11 CORRECT 11 "a_y_y=F_y/m" Self-explanation Control WRITE-NSL-COMPO (= Yc_a_ELECTRON_12_0 (/ Yc_Fe_ELECTRON_PLATES_12_0 m_ELECTRON)) s0703 s0703-Feb05-10-09-24 2007-02-05 11:45:30.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 3 CORRECT 4 "a_y_y" Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:46:30.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 4 CORRECT 12 "v_y_y" Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 11:46:45.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.027e+7 m/s" Self-explanation Control 49 s0703 s0703-Feb05-10-09-24 2007-02-05 12:00:04.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="e";body=electron;time=NIL Self-explanation Control DRAW-BODY 15 s0703 s0703-Feb05-10-09-24 2007-02-05 12:00:18.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Self-explanation Control DRAW-UNROTATED-AXES 25 s0703 s0703-Feb05-10-09-24 2007-02-05 12:00:38.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-669 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Self-explanation Control DEFINE-CHARGE 29 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) s0703 s0703-Feb05-10-09-24 2007-02-05 12:00:52.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-670 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Self-explanation Control DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 kg)) s0703 s0703-Feb05-10-09-24 2007-02-05 12:01:18.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-671 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=104 Self-explanation Control DRAW-FIELD-GIVEN-DIR s0703 s0703-Feb05-10-09-24 2007-02-05 12:01:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 0 "E=4.00e-12 N/C" Self-explanation Control WRITE-KNOWN-VALUE-EQN 36 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) s0703 s0703-Feb05-10-09-24 2007-02-05 12:02:11.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-672 label="v0_y";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=40 Self-explanation Control DRAW-VELOCITY-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 12:02:27.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 1 "v0_y=4.30 m/s" Self-explanation Control WRITE-KNOWN-VALUE-EQN 40 (= v_ELECTRON_1 (DNUM 4.3 m/s)) s0703 s0703-Feb05-10-09-24 2007-02-05 12:02:56.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-673 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST s0703 s0703-Feb05-10-09-24 2007-02-05 12:03:21.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 2 INCORRECT 2 "v1_y=0" Undefined variable: v1_y 1 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST 39 s0703 s0703-Feb05-10-09-24 2007-02-05 12:03:31.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 3 CORRECT Vector-673 label="v1";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Self-explanation Control DRAW-VELOCITY-MOMENTARILY-AT-REST 40 s0703 s0703-Feb05-10-09-24 2007-02-05 12:03:33.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_2_0 0)) 1 CORRECT 2 "v1_y=0" Self-explanation Control COMPO-ZERO-VECTOR (= Yc_v_ELECTRON_2_0 0) s0703 s0703-Feb05-10-09-24 2007-02-05 12:04:15.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-674 label="Fw_y";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=102 Self-explanation Control DRAW-WEIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 12:04:41.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 CORRECT 3 "Fw_y=m*g" Self-explanation Control WT-LAW (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH)) s0703 s0703-Feb05-10-09-24 2007-02-05 12:04:50.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 1 CORRECT 4 "Fw_y" Self-explanation Control s0703 s0703-Feb05-10-09-24 2007-02-05 12:06:26.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 HINT Vector-676 label=a Now that you have stated all of the given information, you should start on the major principles. What quantity is the problem seeking? 1 Self-explanation Control DRAW-ACCEL-SLOW-DOWN s0703 s0703-Feb05-10-09-24 2007-02-05 12:06:44.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Sought ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 HINT #.(wb-quant '(define-variable "d" |NIL| |displacement| |electron| |T1| |NIL| NIL "") 'mag) That quantity is not mentioned in the Andes solution. 2 Self-explanation Control DRAW-ACCEL-SLOW-DOWN s0703 s0703-Feb05-10-09-24 2007-02-05 12:06:50.0 US/Eastern HINT_REQUEST Choose-Sought HINT_MSG Ask-Principle ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 3 HINT #.(wb-quant '(define-variable "d" |NIL| |displacement| |electron| |T0 to T1| |NIL| NIL "") 'mag) That's right. What is the first principle application that you would like to work on? Hint: this principle application will usually be one that mentions the sought quantity explicitly. Therefore its equation may contain the sought quantity that the problem seeks. 3 Self-explanation Control DRAW-ACCEL-SLOW-DOWN s0703 s0703-Feb05-10-09-24 2007-02-05 12:07:01.0 US/Eastern HINT_REQUEST Choose-Principle HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 4 HINT (lk-no-vf ((?axis . y))) Good! A good step would be choosing a particular kinematic equation containing the y component of the displacement of the electron from T0 to T1. 4 Self-explanation Control DRAW-ACCEL-SLOW-DOWN s0703 s0703-Feb05-10-09-24 2007-02-05 12:07:19.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 5 HINT You should be drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 5 Self-explanation Control DRAW-ACCEL-SLOW-DOWN s0703 s0703-Feb05-10-09-24 2007-02-05 12:07:22.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 6 HINT Notice that the electron is slowing down as it moves in a straight line from T0 to T1 6 Self-explanation Control DRAW-ACCEL-SLOW-DOWN s0703 s0703-Feb05-10-09-24 2007-02-05 12:07:25.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG MINILESSON ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 7 HINT mini_slowdown_accel.htm 7 7 Self-explanation Control DRAW-ACCEL-SLOW-DOWN s0703 s0703-Feb05-10-09-24 2007-02-05 12:07:28.0 US/Eastern HINT_REQUEST Choose- HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 8 HINT close-lesson Do you wish for more hints? 8 Self-explanation Control DRAW-ACCEL-SLOW-DOWN s0703 s0703-Feb05-10-09-24 2007-02-05 12:07:29.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 9 HINT Because the electron is slowing down as it moves in a straight line, draw an acceleration vector for it at from T0 to T1. It should have a direction of 270 degrees because that is the opposite direction from its motion. 9 9 Self-explanation Control DRAW-ACCEL-SLOW-DOWN 35 s0703 s0703-Feb05-10-09-24 2007-02-05 12:07:58.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 10 CORRECT Vector-675 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=59 Self-explanation Control DRAW-ACCEL-SLOW-DOWN s0703 s0703-Feb05-10-09-24 2007-02-05 12:08:12.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 HINT Vector-679 label=d Why don't you continue with the solution by working on writing the constant acceleration equation d_y = v0_y*t + 0.5*a_y*t^2 for the electron from T0 to T1. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 12:08:53.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT 5 "d_y=v0_y*t+0.5*a_y*t^2" Undefined variables: (d_y t t) 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 34 s0703 s0703-Feb05-10-09-24 2007-02-05 12:09:54.0 US/Eastern HINT_REQUEST NextStepHelp HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Vector-679 label=d Why don't you continue working on writing the constant acceleration equation d_y = v0_y*t + 0.5*a_y*t^2 for the electron from T0 to T1. 1 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 12:09:57.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 HINT Vector-679 label=d A good step would be choosing a particular kinematic equation containing the y component of the displacement of the electron from T0 to T1. 2 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 12:09:59.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 HINT Vector-679 label=d Try drawing a diagram showing all of the needed kinematic vectors of the electron from T0 to T1 and coordinate axes. 3 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 12:10:01.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT Vector-679 label=d Notice that the electron is moving in a straight line from T0 to T1. 4 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 12:10:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 HINT Vector-679 label=d Whenever an object is moving in a straight line over a time interval, it has a displacement which is parallel to the direction of motion. 5 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT s0703 s0703-Feb05-10-09-24 2007-02-05 12:10:11.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG NextStepHelp ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 8 HINT Vector-679 label=d Because the electron is moving in a straight line from T0 to T1, use the displacement tool to draw a displacement vector for it in direction 90 degrees 6 6 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT 29 s0703 s0703-Feb05-10-09-24 2007-02-05 12:10:33.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 9 CORRECT Vector-676 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=82 Self-explanation Control DRAW-DISPLACEMENT-STRAIGHT s0706 s0706-Feb07-14-56-32 2007-02-07 15:08:27.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 22 deg)) 1 CORRECT Vector-1 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=22;mag=221 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 5 s0706 s0706-Feb07-14-56-32 2007-02-07 15:09:32.0 US/Eastern ATTEMPT Variable RESULT Unsolicited FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 1 INCORRECT Var-2 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9E-6" Forgot to put units on a number. 1 Joint Explanation Experimental DEFINE-CHARGE 2 (= Q_PARTICLE (- 7.900000000000001e-6)) s0706 s0706-Feb07-14-56-32 2007-02-07 15:09:44.0 US/Eastern ATTEMPT Variable RESULT FOR* FOR4C (DEFINE-VAR (CHARGE PARTICLE SURFACE NIL TIME NIL)) 2 CORRECT Var-2 label="q";quant=charge-on;subtype=NIL;body=particle;agent=NIL;time=NIL;value="-7.9E-6 C" Joint Explanation Experimental DEFINE-CHARGE 11 (= Q_PARTICLE (* (- 7.900000000000001e-6) (DNUM 1 C))) s0706 s0706-Feb07-14-56-32 2007-02-07 15:09:44.0 US/Eastern DELETION FOR* FOR4C Vector-3 Delete label=NIL Joint Explanation Experimental s0706 s0706-Feb07-14-56-32 2007-02-07 15:12:18.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 1 INCORRECT Vector-4 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=22;mag=231 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES 10 s0706 s0706-Feb07-14-56-32 2007-02-07 15:12:28.0 US/Eastern HINT_REQUEST Whats-Wrong HINT_MSG Whats-Wrong FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 2 HINT Vector-4 label=F Do you really want the direction of that vector to be 22 degrees? 1 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES s0706 s0706-Feb07-14-56-32 2007-02-07 15:12:56.0 US/Eastern ATTEMPT Vector RESULT FOR* FOR4C (VECTOR (NET-FORCE PARTICLE TIME 1) (DNUM 202 deg)) 3 CORRECT Vector-4 label="F";type=Force;body=particle;agent=NIL;forcetype=Net;time=T0;dir=202;mag=231 Joint Explanation Experimental DRAW-NET-FORCE-FROM-FORCES 11 s0706 s0706-Feb07-14-56-32 2007-02-07 15:13:57.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (DRAW-AXES 0) 1 INCORRECT 0 "E_x=14.3E3*cos(22) N/C" Undefined variable: E_x 1 Joint Explanation Experimental DRAW-UNROTATED-AXES 10 s0706 s0706-Feb07-14-56-32 2007-02-07 15:14:05.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (DRAW-AXES 0) 2 HINT The variable: E_x may be defined by drawing coordinate axes. 2 2 Joint Explanation Experimental DRAW-UNROTATED-AXES s0706 s0706-Feb07-14-56-32 2007-02-07 15:14:05.0 US/Eastern DELETION FOR* FOR4C Axes-5 Delete label=NIL Joint Explanation Experimental s0706 s0706-Feb07-14-56-32 2007-02-07 15:14:05.0 US/Eastern DELETION FOR* FOR4C Axes-6 Delete label=NIL Joint Explanation Experimental s0706 s0706-Feb07-14-56-32 2007-02-07 15:14:44.0 US/Eastern ATTEMPT Axes RESULT FOR* FOR4C (DRAW-AXES 0) 3 CORRECT Axes-7 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 20 s0706 s0706-Feb07-14-56-32 2007-02-07 15:14:51.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 1 INCORRECT 0 "E_x=14.3E3*cos(22) N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Xc_E_REGION_UNSPECIFIED_0 (* (* 14300.0 (COS 22)) (DNUM 1 N/C))) s0706 s0706-Feb07-14-56-32 2007-02-07 15:14:51.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 2 INCORRECT 0 "E_x=14.3E3*cos(22) N/C" Joint Explanation Experimental COMPO-GENERAL-CASE (= Xc_E_REGION_UNSPECIFIED_0 (* (* 14300.0 (COS 22)) (DNUM 1 N/C))) s0706 s0706-Feb07-14-56-32 2007-02-07 15:14:53.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 3 INCORRECT 0 "E_x=14.3E3*cos(22) N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN (= Xc_E_REGION_UNSPECIFIED_0 (* (* 14300.0 (COS 22)) (DNUM 1 N/C))) s0706 s0706-Feb07-14-56-32 2007-02-07 15:14:53.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 4 INCORRECT 0 "E_x=14.3E3*cos(22) N/C" Joint Explanation Experimental COMPO-GENERAL-CASE (= Xc_E_REGION_UNSPECIFIED_0 (* (* 14300.0 (COS 22)) (DNUM 1 N/C))) s0706 s0706-Feb07-14-56-32 2007-02-07 15:15:22.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 5 INCORRECT 0 "E_x=14.3E3*cos($qE) N/C" Syntax error in E_x=14.3E3*cos($qE) N/C 1 Joint Explanation Experimental COMPO-GENERAL-CASE ? s0706 s0706-Feb07-14-56-32 2007-02-07 15:15:28.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 6 HINT The equation or the units in it are not in a recognizable form. 2 Joint Explanation Experimental COMPO-GENERAL-CASE s0706 s0706-Feb07-14-56-32 2007-02-07 15:15:58.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 7 INCORRECT 0 "E_x=E*cos($qE) N/C" Syntax error in E_x=E*cos($qE) N/C 1 Joint Explanation Experimental COMPO-GENERAL-CASE 19 ? s0706 s0706-Feb07-14-56-32 2007-02-07 15:16:24.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 8 INCORRECT 0 "E_x=E*cos($qE) N/C" Syntax error in E_x=E*cos($qE) N/C 1 Joint Explanation Experimental COMPO-GENERAL-CASE ? s0706 s0706-Feb07-14-56-32 2007-02-07 15:16:25.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 9 HINT The equation or the units in it are not in a recognizable form. 2 Joint Explanation Experimental COMPO-GENERAL-CASE s0706 s0706-Feb07-14-56-32 2007-02-07 15:16:28.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 10 HINT Though I can't tell exactly what the mistake is, a few common sources of errors are: (a) Unit symbols are case sensitive. (b) Multiplication always requires an explicit multiplication sign: W=m*g, NOT W=mg. (c) Units attach only to numbers, not to variables or expressions. 3 3 Joint Explanation Experimental COMPO-GENERAL-CASE s0706 s0706-Feb07-14-56-32 2007-02-07 15:17:01.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS (- (DNUM 22 deg) (DNUM 0 deg)))))) 11 CORRECT 0 "E_x=E*cos($qE) " Joint Explanation Experimental COMPO-GENERAL-CASE (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS OE_REGION_UNSPECIFIED))) s0706 s0706-Feb07-14-56-32 2007-02-07 15:17:01.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (IMPLICIT-EQN (= OE_REGION_UNSPECIFIED (DNUM 22 deg))) 1 CORRECT 0 "E_x=E*cos($qE) " Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR (= Xc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (COS OE_REGION_UNSPECIFIED))) s0706 s0706-Feb07-14-56-32 2007-02-07 15:17:05.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 1 INCORRECT 1 "E_y=14.3E3*sin($qE) " Forgot to put units on a number. 1 Joint Explanation Experimental COMPO-GENERAL-CASE (= Yc_E_REGION_UNSPECIFIED_0 (* 14300.0 (SIN OE_REGION_UNSPECIFIED))) s0706 s0706-Feb07-14-56-32 2007-02-07 15:17:14.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN (- (DNUM 22 deg) (DNUM 0 deg)))))) 2 CORRECT 1 "E_y=E*sin($qE) " Joint Explanation Experimental COMPO-GENERAL-CASE 20 (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN OE_REGION_UNSPECIFIED))) s0706 s0706-Feb07-14-56-32 2007-02-07 15:17:14.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (IMPLICIT-EQN (= OE_REGION_UNSPECIFIED (DNUM 22 deg))) 2 CORRECT 1 "E_y=E*sin($qE) " Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 20 (= Yc_E_REGION_UNSPECIFIED_0 (* E_REGION_UNSPECIFIED (SIN OE_REGION_UNSPECIFIED))) s0706 s0706-Feb07-14-56-32 2007-02-07 15:17:16.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Xc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Xc_E_REGION_UNSPECIFIED_0))) 1 CORRECT 2 "F_x=E_x*q" Although equation 3 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 40 (= Xc_Fnet_PARTICLE_1_0 (* Xc_E_REGION_UNSPECIFIED_0 Q_PARTICLE)) s0706 s0706-Feb07-14-56-32 2007-02-07 15:17:16.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= (+ Xc_Fe_PARTICLE_UNSPECIFIED_1_0) Xc_Fnet_PARTICLE_1_0)) 1 CORRECT 2 "F_x=E_x*q" Although equation 3 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-NET-FORCE-COMPO 40 (= Xc_Fnet_PARTICLE_1_0 (* Xc_E_REGION_UNSPECIFIED_0 Q_PARTICLE)) s0706 s0706-Feb07-14-56-32 2007-02-07 15:17:20.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 1 HINT It is good practice to identify the fundamental vector principles you are using by writing them purely symbolically in component form before combining them with other equations or given values. Select "Review Physics Equations" on the Help menu to view a list of principles and their standard forms. 2 Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN s0706 s0706-Feb07-14-56-32 2007-02-07 15:17:45.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C))) 2 CORRECT 5 "E=14.3E+3 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 47 (= E_REGION_UNSPECIFIED (DNUM 14300.0 N/C)) s0706 s0706-Feb07-14-56-32 2007-02-07 15:17:48.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= Yc_Fe_PARTICLE_UNSPECIFIED_1_0 (* Q_PARTICLE Yc_E_REGION_UNSPECIFIED_0))) 1 CORRECT 3 "F_y=E_y*q" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-COMPO 48 (= Yc_Fnet_PARTICLE_1_0 (* Yc_E_REGION_UNSPECIFIED_0 Q_PARTICLE)) s0706 s0706-Feb07-14-56-32 2007-02-07 15:17:48.0 US/Eastern ATTEMPT Equation RESULT Unsolicited FOR* FOR4C (EQN (= (+ Yc_Fe_PARTICLE_UNSPECIFIED_1_0) Yc_Fnet_PARTICLE_1_0)) 1 CORRECT 3 "F_y=E_y*q" Although equation 4 is correct, you have not displayed a fundamental vector principle written in component form on a line by itself. 1 Joint Explanation Experimental WRITE-NET-FORCE-COMPO 48 (= Yc_Fnet_PARTICLE_1_0 (* Yc_E_REGION_UNSPECIFIED_0 Q_PARTICLE)) s0706 s0706-Feb07-14-56-32 2007-02-07 15:17:54.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Yc_Fnet_PARTICLE_1_0 (* Fnet_PARTICLE_1 (SIN (- (DNUM 202 deg) (DNUM 0 deg)))))) 1 CORRECT 4 "F=(F_x^2+F_y^2)^(1/2)" Joint Explanation Experimental COMPO-GENERAL-CASE (= Fnet_PARTICLE_1 (^ (+ (^ Xc_Fnet_PARTICLE_1_0 2) (^ Yc_Fnet_PARTICLE_1_0 2)) (/ 1 2))) s0706 s0706-Feb07-14-56-32 2007-02-07 15:17:54.0 US/Eastern ATTEMPT Equation RESULT FOR* FOR4C (EQN (= Xc_Fnet_PARTICLE_1_0 (* Fnet_PARTICLE_1 (COS (- (DNUM 202 deg) (DNUM 0 deg)))))) 1 CORRECT 4 "F=(F_x^2+F_y^2)^(1/2)" Joint Explanation Experimental COMPO-GENERAL-CASE (= Fnet_PARTICLE_1 (^ (+ (^ Xc_Fnet_PARTICLE_1_0 2) (^ Yc_Fnet_PARTICLE_1_0 2)) (/ 1 2))) s0706 s0706-Feb07-14-56-32 2007-02-07 15:18:04.0 US/Eastern CALC_REQUEST Solve CALC_RESULT FOR* FOR4C CALC_REQUEST 1 CORRECT 6 "F" Joint Explanation Experimental s0706 s0706-Feb07-14-56-32 2007-02-07 15:18:28.0 US/Eastern ATTEMPT Answer RESULT FOR* FOR4C Answer-1 1 CORRECT Answer-1 " 0.113 N" Joint Explanation Experimental 73 s0706 s0706-Feb07-14-56-32 2007-02-07 15:29:08.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC1C (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="qe";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 s0706 s0706-Feb07-14-56-32 2007-02-07 15:29:19.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC1C (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-COMPO-FORM-AXES 25 s0706 s0706-Feb07-14-56-32 2007-02-07 15:32:04.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME 1) (DNUM 270 deg)) 1 CORRECT Vector-669 label="Fe";type=Force;body=electron;agent=earth;forcetype=grav;time=T0;dir=270;mag=148 Joint Explanation Experimental DRAW-WEIGHT s0706 s0706-Feb07-14-56-32 2007-02-07 15:32:30.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-670 label="Fu";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0;dir=90;mag=140 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0706 s0706-Feb07-14-56-32 2007-02-07 15:33:18.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-671 label="me";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11E-31 kg" Joint Explanation Experimental DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 kg)) s0706 s0706-Feb07-14-56-32 2007-02-07 15:33:42.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC1C (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-672 label="qe";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60E-19 C" Joint Explanation Experimental DEFINE-CHARGE 40 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) s0706 s0706-Feb07-14-56-32 2007-02-07 15:38:05.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH))) 1 CORRECT 0 "Fe=me*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_1 (* m_ELECTRON g_EARTH)) s0706 s0706-Feb07-14-56-32 2007-02-07 15:38:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fnet_ELECTRON_1_0 0)) 1 CORRECT 1 "Fe=Fu" Joint Explanation Experimental COMPO-ZERO-VECTOR (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) s0706 s0706-Feb07-14-56-32 2007-02-07 15:38:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fw_ELECTRON_EARTH_1_0 (- Fw_ELECTRON_EARTH_1))) 1 CORRECT 1 "Fe=Fu" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) s0706 s0706-Feb07-14-56-32 2007-02-07 15:38:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= (+ Yc_Fw_ELECTRON_EARTH_1_0 Yc_Fe_ELECTRON_UNSPECIFIED_1_0) Yc_Fnet_ELECTRON_1_0)) 1 CORRECT 1 "Fe=Fu" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) s0706 s0706-Feb07-14-56-32 2007-02-07 15:38:07.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_1_0 (+ Fe_ELECTRON_UNSPECIFIED_1))) 1 CORRECT 1 "Fe=Fu" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fw_ELECTRON_EARTH_1 Fe_ELECTRON_UNSPECIFIED_1) s0706 s0706-Feb07-14-56-32 2007-02-07 15:38:08.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 INCORRECT 2 "E=Fu/abs(qe)" Undefined variable: E 1 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR 39 s0706 s0706-Feb07-14-56-32 2007-02-07 15:38:15.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 2 HINT Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR s0706 s0706-Feb07-14-56-32 2007-02-07 15:38:45.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC1C (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 3 CORRECT Vector-673 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=165 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR s0706 s0706-Feb07-14-56-32 2007-02-07 15:38:50.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC1C (EQN (= Fe_ELECTRON_UNSPECIFIED_1 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 2 "E=Fu/abs(qe)" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 75 (= E_REGION_UNSPECIFIED (/ Fe_ELECTRON_UNSPECIFIED_1 (ABS Q_ELECTRON))) s0706 s0706-Feb07-14-56-32 2007-02-07 15:38:57.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC1C CALC_REQUEST 1 CORRECT 3 "E" Joint Explanation Experimental s0706 s0706-Feb07-14-56-32 2007-02-07 15:39:55.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC1C Answer-1 1 CORRECT Answer-1 "5.580e-11 N/C" Joint Explanation Experimental 100 s0706 s0706-Feb07-14-56-32 2007-02-07 15:52:12.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-1 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.60e-19 C" Joint Explanation Experimental DEFINE-CHARGE 9 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) s0706 s0706-Feb07-14-56-32 2007-02-07 15:52:33.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-2 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 12 (= m_ELECTRON (DNUM 9.11e-31 kg)) s0706 s0706-Feb07-14-56-32 2007-02-07 15:54:25.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FIELD REGION ELECTRIC PLATES TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-3 label="E";type=E-field;body=region;agent=plates;time=NIL;dir=270;mag=124 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR s0706 s0706-Feb07-14-56-32 2007-02-07 15:54:37.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC3A (BODY ELECTRON TIME NIL) 1 CORRECT System-4 label="qe";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 22 s0706 s0706-Feb07-14-56-32 2007-02-07 15:55:08.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= E_REGION_PLATES (DNUM 20000.0 N/C))) 1 CORRECT 0 "E=2.00e4 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 26 (= E_REGION_PLATES (DNUM 20000.0 N/C)) s0706 s0706-Feb07-14-56-32 2007-02-07 15:57:47.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Vector-5 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0;dir=90;mag=136 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 25 s0706 s0706-Feb07-14-56-32 2007-02-07 15:58:08.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (FORCE ELECTRON PLATES ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-5 label="F";type=Force;body=electron;agent=plates;forcetype=Electric;time=T0 to T1;dir=90;mag=136 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 26 s0706 s0706-Feb07-14-56-32 2007-02-07 15:58:48.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES))) 1 CORRECT 1 "F=abs(q)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 37 (= Fe_ELECTRON_PLATES_12 (* (ABS Q_ELECTRON) E_REGION_PLATES)) s0706 s0706-Feb07-14-56-32 2007-02-07 15:59:32.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-6 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=90;mag=120 Joint Explanation Experimental DRAW-ACCEL-SPEED-UP s0706 s0706-Feb07-14-56-32 2007-02-07 15:59:47.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 1 TRUE_BUT_IRRELEVANT 2 "a=F/m" Joint Explanation Experimental (= a_ELECTRON_12 (/ Fe_ELECTRON_PLATES_12 m_ELECTRON)) s0706 s0706-Feb07-14-56-32 2007-02-07 16:00:40.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (VELOCITY ELECTRON TIME 2) (DNUM 90 deg)) 1 CORRECT Vector-7 label="v";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=90;mag=125 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT s0706 s0706-Feb07-14-56-32 2007-02-07 16:01:27.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 INCORRECT Var-8 label="d";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="0.015 m" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0706 s0706-Feb07-14-56-32 2007-02-07 16:01:37.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT 3 "v=(2*a*d)^(1/2)" The variable d is not used in any solution I know of. 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0706 s0706-Feb07-14-56-32 2007-02-07 16:01:39.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Var-7 label=s I can only recognize equations and variables from solutions I know about. This variable is not used in any of the solutions I have recorded for this problem. It's possible you are pursuing a solution that I don't know about, but if so, I can't help you with it and simpler solutions are probably available. 2 2 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0706 s0706-Feb07-14-56-32 2007-02-07 16:01:56.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 4 INCORRECT Var-8 label="s";quant=distance;subtype=NIL;body=electron;agent=NIL;time=T0 to T1;value="0.015 m" Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT 36 s0706 s0706-Feb07-14-56-32 2007-02-07 16:02:02.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 5 INCORRECT 3 "v=(2*a*s)^(1/2)" The variable s is not used in any solution I know of. 1 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0706 s0706-Feb07-14-56-32 2007-02-07 16:02:14.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 6 HINT Var-7 label=s I can only recognize equations and variables from solutions I know about. This variable is not used in any of the solutions I have recorded for this problem. It's possible you are pursuing a solution that I don't know about, but if so, I can't help you with it and simpler solutions are probably available. 2 2 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0706 s0706-Feb07-14-56-32 2007-02-07 16:02:14.0 US/Eastern DELETION ELEC* ELEC3A Var-8 Delete label=s Joint Explanation Experimental s0706 s0706-Feb07-14-56-32 2007-02-07 16:04:00.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC3A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 7 CORRECT Vector-9 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=148 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0706 s0706-Feb07-14-56-32 2007-02-07 16:04:13.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A (EQN (= s_ELECTRON_12 (DNUM 0.015 m))) 1 CORRECT 4 "d=0.015 m" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 40 (= s_ELECTRON_12 (DNUM 0.015 m)) s0706 s0706-Feb07-14-56-32 2007-02-07 16:04:17.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC3A No Intepretation 2 TRUE_BUT_IRRELEVANT 3 "v=(2*a*d)^(1/2)" Joint Explanation Experimental (= v_ELECTRON_2 (^ (* (* 2 a_ELECTRON_12) s_ELECTRON_12) (/ 1 2))) s0706 s0706-Feb07-14-56-32 2007-02-07 16:04:26.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC3A CALC_REQUEST 1 CORRECT 5 "v" Joint Explanation Experimental s0706 s0706-Feb07-14-56-32 2007-02-07 16:04:43.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC3A Answer-1 1 CORRECT Answer-1 "1.03e+7 m/s" Joint Explanation Experimental 65 s0706 s0706-Feb07-14-56-32 2007-02-07 16:18:35.0 US/Eastern ATTEMPT Body RESULT ELEC* ELEC6A (BODY ELECTRON TIME NIL) 1 CORRECT System-667 label="qe";body=electron;time=NIL Joint Explanation Experimental DRAW-BODY 15 s0706 s0706-Feb07-14-56-32 2007-02-07 16:18:46.0 US/Eastern ATTEMPT Axes RESULT ELEC* ELEC6A (DRAW-AXES 0) 1 CORRECT Axes-668 body=NIL;dir=0;x_label="x";y_label="y";z_label="z" Joint Explanation Experimental DRAW-UNROTATED-AXES 25 s0706 s0706-Feb07-14-56-32 2007-02-07 16:19:03.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FIELD REGION ELECTRIC UNSPECIFIED TIME NIL) (DNUM 270 deg)) 1 CORRECT Vector-669 label="E";type=E-field;body=region;agent=Unspecified;time=NIL;dir=270;mag=139 Joint Explanation Experimental DRAW-FIELD-GIVEN-DIR s0706 s0706-Feb07-14-56-32 2007-02-07 16:19:34.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-670 label="F";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=12 Joint Explanation Experimental DRAW-WEIGHT s0706 s0706-Feb07-14-56-32 2007-02-07 16:19:39.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON EARTH WEIGHT TIME (DURING 1 2)) (DNUM 270 deg)) 2 CORRECT Vector-670 label="F";type=Force;body=electron;agent=earth;forcetype=grav;time=T0 to T1;dir=270;mag=98 Joint Explanation Experimental DRAW-WEIGHT s0706 s0706-Feb07-14-56-32 2007-02-07 16:20:03.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (CHARGE ELECTRON SURFACE NIL TIME NIL)) 1 CORRECT Var-671 label="q";quant=charge-on;subtype=NIL;body=electron;agent=NIL;time=NIL;value="-1.6e-19 C" Joint Explanation Experimental DEFINE-CHARGE 29 (= Q_ELECTRON (* (- 1.5999999999999998e-19) (DNUM 1 C))) s0706 s0706-Feb07-14-56-32 2007-02-07 16:20:15.0 US/Eastern ATTEMPT Variable RESULT ELEC* ELEC6A (DEFINE-VAR (MASS ELECTRON TIME NIL)) 1 CORRECT Var-672 label="m";quant=mass;subtype=NIL;body=electron;agent=NIL;time=NIL;value="9.11e-31 kg" Joint Explanation Experimental DEFINE-MASS 32 (= m_ELECTRON (DNUM 9.11e-31 kg)) s0706 s0706-Feb07-14-56-32 2007-02-07 16:20:42.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C))) 1 CORRECT 0 "E=4.00e-12 N/C" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 36 (= E_REGION_UNSPECIFIED (DNUM 3.9999999999999997e-12 N/C)) s0706 s0706-Feb07-14-56-32 2007-02-07 16:21:24.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 1) (DNUM 90 deg)) 1 CORRECT Vector-673 label="vi";type=Velocity;body=electron;agent=instantaneous;time=T0;dir=90;mag=75 Joint Explanation Experimental DRAW-VELOCITY-STRAIGHT s0706 s0706-Feb07-14-56-32 2007-02-07 16:21:32.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= v_ELECTRON_1 (DNUM 4.3 m/s))) 1 CORRECT 1 "vi=4.30 m/s" Joint Explanation Experimental WRITE-KNOWN-VALUE-EQN 40 (= v_ELECTRON_1 (DNUM 4.3 m/s)) s0706 s0706-Feb07-14-56-32 2007-02-07 16:22:30.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-674 label="Fe";type=Force;body=electron;agent=Unspecified;forcetype=Electric;time=T0 to T1;dir=90;mag=128 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0706 s0706-Feb07-14-56-32 2007-02-07 16:23:00.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED))) 1 CORRECT 2 "Fe=abs(q)*E" Joint Explanation Experimental WRITE-CHARGE-FORCE-EFIELD-MAG 52 (= Fe_ELECTRON_UNSPECIFIED_12 (* (ABS Q_ELECTRON) E_REGION_UNSPECIFIED)) s0706 s0706-Feb07-14-56-32 2007-02-07 16:23:14.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH))) 1 CORRECT 3 "F=m*g" Joint Explanation Experimental WT-LAW (= Fw_ELECTRON_EARTH_12 (* m_ELECTRON g_EARTH)) s0706 s0706-Feb07-14-56-32 2007-02-07 16:23:14.0 US/Eastern DELETION ELEC* ELEC6A Vector-675 Delete label=NIL Joint Explanation Experimental s0706 s0706-Feb07-14-56-32 2007-02-07 16:25:17.0 US/Eastern ATTEMPT Equation RESULT Unsolicited ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 2 INCORRECT 4 "Fn=Fe-F" Undefined variable: Fn 1 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR 51 s0706 s0706-Feb07-14-56-32 2007-02-07 16:25:24.0 US/Eastern HINT_REQUEST Explain-Further HINT_MSG Unsolicited ELEC* ELEC6A (VECTOR (FORCE ELECTRON UNSPECIFIED ELECTRIC TIME (DURING 1 2)) (DNUM 90 deg)) 3 HINT Vector-670 label=Fe Variables must be defined before being used in an equation. Vectors are defined by the drawing tools (the buttons along the left edge of the window) and scalars are defined by the clicking on the 'Variable' button at the top of the window.\n If all variables have been defined, the problem may be incorrect unit symbols, including case errors. For example, 'N', not 'n', is the symbol for Newtons. 2 2 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0706 s0706-Feb07-14-56-32 2007-02-07 16:26:07.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 INCORRECT Vector-676 label="Fn";type=Force;body=electron;agent=Unspecified;forcetype=Applied;time=T0 to T1;dir=270;mag=129 Joint Explanation Experimental DRAW-ELECTRIC-FORCE-GIVEN-FIELD-DIR s0706 s0706-Feb07-14-56-32 2007-02-07 16:26:46.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (NET-FORCE ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 CORRECT Vector-676 label="Fn";type=Force;body=electron;agent=NIL;forcetype=Net;time=T0 to T1;dir=270;mag=129 Joint Explanation Experimental DRAW-NET-FORCE-FROM-ACCEL s0706 s0706-Feb07-14-56-32 2007-02-07 16:26:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 1 INCORRECT 4 "Fn=Fe-F" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) s0706 s0706-Feb07-14-56-32 2007-02-07 16:26:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 1 INCORRECT 4 "Fn=Fe-F" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) s0706 s0706-Feb07-14-56-32 2007-02-07 16:26:49.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 1 INCORRECT 4 "Fn=Fe-F" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) s0706 s0706-Feb07-14-56-32 2007-02-07 16:26:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fe_ELECTRON_UNSPECIFIED_12_0 (+ Fe_ELECTRON_UNSPECIFIED_12))) 2 INCORRECT 4 "Fn=Fe-F" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) s0706 s0706-Feb07-14-56-32 2007-02-07 16:26:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_Fw_ELECTRON_EARTH_12_0 (- Fw_ELECTRON_EARTH_12))) 2 INCORRECT 4 "Fn=Fe-F" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) s0706 s0706-Feb07-14-56-32 2007-02-07 16:26:51.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= (+ Yc_Fw_ELECTRON_EARTH_12_0 Yc_Fe_ELECTRON_UNSPECIFIED_12_0) Yc_Fnet_ELECTRON_12_0)) 2 INCORRECT 4 "Fn=Fe-F" Joint Explanation Experimental WRITE-NET-FORCE-COMPO (= Fnet_ELECTRON_12 (- Fe_ELECTRON_UNSPECIFIED_12 Fw_ELECTRON_EARTH_12)) s0706 s0706-Feb07-14-56-32 2007-02-07 16:27:04.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 1 TRUE_BUT_IRRELEVANT 4 "Fn=F-Fe" Joint Explanation Experimental (= Fnet_ELECTRON_12 (- Fw_ELECTRON_EARTH_12 Fe_ELECTRON_UNSPECIFIED_12)) s0706 s0706-Feb07-14-56-32 2007-02-07 16:27:37.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 1 CORRECT Vector-677 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=27 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN s0706 s0706-Feb07-14-56-32 2007-02-07 16:27:41.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (ACCEL ELECTRON TIME (DURING 1 2)) (DNUM 270 deg)) 2 CORRECT Vector-677 label="a";type=Acceleration;body=electron;agent=average;time=T0 to T1;dir=270;mag=132 Joint Explanation Experimental DRAW-ACCEL-SLOW-DOWN s0706 s0706-Feb07-14-56-32 2007-02-07 16:27:47.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 2 TRUE_BUT_IRRELEVANT 5 "a=Fn/m" Joint Explanation Experimental (= a_ELECTRON_12 (/ Fnet_ELECTRON_12 m_ELECTRON)) s0706 s0706-Feb07-14-56-32 2007-02-07 16:28:16.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 1 CORRECT Vector-678 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=121 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0706 s0706-Feb07-14-56-32 2007-02-07 16:29:12.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (VELOCITY ELECTRON TIME 2) ZERO) 1 CORRECT Vector-679 label="vf";type=Velocity;body=electron;agent=instantaneous;time=T1;dir=NIL;mag=0 Joint Explanation Experimental DRAW-VELOCITY-MOMENTARILY-AT-REST s0706 s0706-Feb07-14-56-32 2007-02-07 16:29:38.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 1 INCORRECT 6 "vf^2=vi^2+(2*a*d)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0706 s0706-Feb07-14-56-32 2007-02-07 16:29:38.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 1 INCORRECT 6 "vf^2=vi^2+(2*a*d)" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0706 s0706-Feb07-14-56-32 2007-02-07 16:29:38.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 1 INCORRECT 6 "vf^2=vi^2+(2*a*d)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0706 s0706-Feb07-14-56-32 2007-02-07 16:30:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 2 INCORRECT 6 "vf^2=vi^2+(2*a*d)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0706 s0706-Feb07-14-56-32 2007-02-07 16:30:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 2 INCORRECT 6 "vf^2=vi^2+(2*a*d)" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0706 s0706-Feb07-14-56-32 2007-02-07 16:30:31.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 2 INCORRECT 6 "vf^2=vi^2+(2*a*d)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0706 s0706-Feb07-14-56-32 2007-02-07 16:31:16.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 3 INCORRECT 6 "vf^2=vi^2+(2*a*d)" Joint Explanation Experimental COMPO-PARALLEL-AXIS 50 (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0706 s0706-Feb07-14-56-32 2007-02-07 16:31:16.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 3 INCORRECT 6 "vf^2=vi^2+(2*a*d)" Joint Explanation Experimental WRITE-LK-NO-T-COMPO 50 (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0706 s0706-Feb07-14-56-32 2007-02-07 16:31:16.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 3 INCORRECT 6 "vf^2=vi^2+(2*a*d)" Joint Explanation Experimental COMPO-PARALLEL-AXIS 50 (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0706 s0706-Feb07-14-56-32 2007-02-07 16:32:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_v_ELECTRON_1_0 (+ v_ELECTRON_1))) 4 INCORRECT 6 "vf^2=vi^2+(2*a*d)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0706 s0706-Feb07-14-56-32 2007-02-07 16:32:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= 0 (+ (^ Yc_v_ELECTRON_1_0 2) (* 2 Yc_a_ELECTRON_12_0 Yc_s_ELECTRON_12_0)))) 4 INCORRECT 6 "vf^2=vi^2+(2*a*d)" Joint Explanation Experimental WRITE-LK-NO-T-COMPO (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0706 s0706-Feb07-14-56-32 2007-02-07 16:32:44.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A (EQN (= Yc_s_ELECTRON_12_0 (+ s_ELECTRON_12))) 4 INCORRECT 6 "vf^2=vi^2+(2*a*d)" Joint Explanation Experimental COMPO-PARALLEL-AXIS (= (^ v_ELECTRON_2 2) (+ (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0706 s0706-Feb07-14-56-32 2007-02-07 16:33:21.0 US/Eastern ATTEMPT Vector RESULT ELEC* ELEC6A (VECTOR (DISPLACEMENT ELECTRON TIME (DURING 1 2)) (DNUM 90 deg)) 2 CORRECT Vector-678 label="d";type=Displacement;body=electron;agent=NIL;time=T0 to T1;dir=90;mag=121 Joint Explanation Experimental DRAW-DISPLACEMENT-STRAIGHT s0706 s0706-Feb07-14-56-32 2007-02-07 16:34:17.0 US/Eastern ATTEMPT Equation RESULT ELEC* ELEC6A No Intepretation 3 TRUE_BUT_IRRELEVANT 6 "vf^2=vi^2-(2*a*d)" Joint Explanation Experimental (= (^ v_ELECTRON_2 2) (- (^ v_ELECTRON_1 2) (* (* 2 a_ELECTRON_12) s_ELECTRON_12))) s0706 s0706-Feb07-14-56-32 2007-02-07 16:34:28.0 US/Eastern CALC_REQUEST Solve CALC_RESULT ELEC* ELEC6A CALC_REQUEST 1 CORRECT 7 "d" Joint Explanation Experimental s0706 s0706-Feb07-14-56-32 2007-02-07 16:34:38.0 US/Eastern ATTEMPT Answer RESULT ELEC* ELEC6A Answer-1 1 CORRECT Answer-1 "1.02 m" Joint Explanation Experimental 75