Sigma Xi is sponsoring a semianr this Friday: Trials, Tribulations and Triumphs of Creating a High Tech Company by Dr. Gene Dantsker of Nanostream.  Seaver 111 at 3:15.

Extra exercises for test preparation: 12-25P, 13-11P, 13-23P

The momentum problems are due on Friday.

The momentum test is on Monday.

Advance warning... there will be an exercises due May 1 that will ask you to make a concept map of everything we've studied this semester.  This is to help you organize the ideas in a way that makes sense to you as you prepare for the final.

Today- we'll define angular momentum and look at some situations when it is conserved.  (Just like linear momentum.)