Ink jet quiz.
Went over quiz.
Went over problems from WebAssign.
Went over questions on problem worksheet.
Test on Friday on electrostatics.
Wednesday, April 30, 2008
Tuesday, April 29, 2008
Tuesday, April 29, 2008
Set up ink jet problem on board and allowed students time to work on it. (Also asked for number of excess electrons.)
Went over ink jet problem.
Summarized electric field and potential graphs for oppositely charged parallel plates, charged conducting shell, uniformly charged insulator.
Calculated work by integration of F . dr
E = F/q
V = work/q
Used same math techniques to calculate gravitational PE. Setting GPE at infinity to be zero, calculated the escape velocity from Earth.
Used same equation to calculate size of black hole with mass of Earth.
WebAssign due tonight 10:30PM
Test on Friday on Electrostatics.
Tomorrow we will start with a quiz on the ink jet problem and then go over any questions on the supplemental problem sheet and from WebAssign.
Went over ink jet problem.
Summarized electric field and potential graphs for oppositely charged parallel plates, charged conducting shell, uniformly charged insulator.
Calculated work by integration of F . dr
E = F/q
V = work/q
Used same math techniques to calculate gravitational PE. Setting GPE at infinity to be zero, calculated the escape velocity from Earth.
Used same equation to calculate size of black hole with mass of Earth.
WebAssign due tonight 10:30PM
Test on Friday on Electrostatics.
Tomorrow we will start with a quiz on the ink jet problem and then go over any questions on the supplemental problem sheet and from WebAssign.
Monday, April 28, 2008
Monday, April 28, 2008
Went over RA 21.3 - electric potential
6 quiz problems on Coulomb's law, electric force, electric field, electric potential.
Assigned WebAssign due Tues 10:30 PM
Tomorrow we will finish up electrostatics and do an ink jet problem.
6 quiz problems on Coulomb's law, electric force, electric field, electric potential.
Assigned WebAssign due Tues 10:30 PM
Tomorrow we will finish up electrostatics and do an ink jet problem.
Friday, April 25, 2008
Friday, April 25, 2008
Went over RA 21.1, 21.2
Discussed charge distribution and electric field for conductors. Drew plots of force vs distance for spherical mass, charged conducting spherical shell, charged solid conducting sphere.
Went over "rules" for drawing electric field lines.
Showed computer program for electric field lines.
Collected RA 21.3
Handed out Coulomb's law problems.
Discussed charge distribution and electric field for conductors. Drew plots of force vs distance for spherical mass, charged conducting spherical shell, charged solid conducting sphere.
Went over "rules" for drawing electric field lines.
Showed computer program for electric field lines.
Collected RA 21.3
Handed out Coulomb's law problems.
Thursday, April 24, 2008
Thursday, April 24, 2008
Went over Relativity test results.
Started electrostatics with introductory lecture. Showed demos using electroscopes.
Charge an ebonite rod by rubbing it with fur (charge by friction). This rubs electrons off the fur and onto the rod.
Bringing the charged rod near the electroscope causes the leaves to spread (like charges repel).
Charge the electroscope by contact.
Now bringing the charged rod close to the electroscope causes the leafs to spread further apart.
Bring the fur (positive charge) near the electroscope causes the leafs to fall back.
Drew pictures showing charges.
Demonstrated and showed with pictures charging by induction.
Demoed the pith balls.
Demoed polarization of charge by attracting a stream of water using both negatively and positively charged strips.
Handed out electrostatics mini-labs. Students tried various activities including the Van De Graff.
Collected RA 21.1, RA 21.2.
Handed out RA 21.3 for homework.
Started electrostatics with introductory lecture. Showed demos using electroscopes.
Charge an ebonite rod by rubbing it with fur (charge by friction). This rubs electrons off the fur and onto the rod.
Bringing the charged rod near the electroscope causes the leaves to spread (like charges repel).
Charge the electroscope by contact.
Now bringing the charged rod close to the electroscope causes the leafs to spread further apart.
Bring the fur (positive charge) near the electroscope causes the leafs to fall back.
Drew pictures showing charges.
Demonstrated and showed with pictures charging by induction.
Demoed the pith balls.
Demoed polarization of charge by attracting a stream of water using both negatively and positively charged strips.
Handed out electrostatics mini-labs. Students tried various activities including the Van De Graff.
Collected RA 21.1, RA 21.2.
Handed out RA 21.3 for homework.
Tuesday, April 22, 2008
Monday, April 21, 2008
Monday April 21, 2008
Reviewed ideas of General Relativity from Friday - in particular the kindergarten approach to time ticking slower near source of gravity.
Calvin and Hobbes intro to Principle of Equivalence.
Principle of Equivalence worksheet.
Pound Rebka worksheet.
Test tomorrow.
Calvin and Hobbes intro to Principle of Equivalence.
Principle of Equivalence worksheet.
Pound Rebka worksheet.
Test tomorrow.
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