Monthly Archives: September 2011

Free charges in conductors

Posted on September 17, 2011 by Andy Rundquist

There’s a great discussion in Griffiths book on electromagnetism (typical book used for junior/senior course for physics majors) about what happens to free charges inside a conductor. He discusses how they will always find their way to the surface, distributing … Continue reading →

Posted in mathematica, physics | 23 Comments

SBG with voice round 2

Posted on September 11, 2011 by Andy Rundquist

This semester I’m teacher Advanced Electricity and Magnetism to juniors and seniors. I’m once again using a standards-based approach, and, once again, I’m having all assessments involve the students’ voices. I have made three major changes to what I did … Continue reading →

Posted in physics, sbar, sbg, teaching | 24 Comments

More brute force probability

Posted on September 2, 2011 by Andy Rundquist

Last night a tweep of mine posted this: http://twitter.com/#!/r_w_wright/status/109368981281976322 I thought about it for a while with factorials running through my head but, as more people were commenting that it’s not trivial, I thought I’d try a brute force approach … Continue reading →

Posted in fun, math, mathematica, twitter | 14 Comments