Basically all classes at Caltech are curved. It actually makes a lot of sense, because it means you can make the tests really hard and leave plenty of room at the top, which among other things helps reduce the variance due to careless errors. (If you make a couple minor minus sign mistakes, but nail a hard problem most people miss, you still come out ahead.) In Physics 1, typically 90%+ was A+, ~82-89% was A.
