Khan/khan-exercises — pull request #5695 by capnrefsmmat (2011-11-06 23:37:05+00:00)
Title: Dot product exercises

This is my first exercise, so I've probably missed a step somewhere in the process. Just a couple of simple exercises on dot products, since I see there's a couple vector exercises but nothing on dot products or cross products yet.

I'm hoping to get into physics exercises (probably something with interactive simulations; I blame @kamens on Hacker News), but I noticed there are no physics exercises at all at the moment. Is this a deliberate move, or should I start opening pull requests?