Category Archives: general physics

Shooting circuits

I’ve posted before about how I struggle teaching complex circuits (really just circuits that contain batteries and resistors in ways that can’t be analyzed with parallel and series tricks). There you’ll read about how I find that if I just … Continue reading

Posted in general physics, physics | 8 Comments

Doppler Drum Corps

One of my favorite oral exam questions to give students in introductory physics classes is to ask them whether marching bands should worry about tuning because of the Doppler Effect (lots of details below but the short version: if there’s … Continue reading

Posted in fun, general physics, mathematica, parenting, physics | 4 Comments

Mass changing orbits

A few weeks ago my good friend John Burk posted some intriguing questions about what happens to planetary orbits as the sun loses mass (all that heat has to come from somewhere!). I’ve been thinking about it ever since and … Continue reading

Posted in general physics, mathematica, physics | 2 Comments

Faraday’s law is overused

First let me say that I thought for sure I’d written this post last year, but it appears not. That could also mean that maybe I didn’t write it because someone else had a good breakdown of my argument, but … Continue reading

Posted in electromagnetism, general physics, physics | 6 Comments