Monday, December 12, 2011

My kids learn about the center of mass

Movie_on_12-12-11_at_7.46_PM_#2.mov Watch on Posterous

No comments:

Post a Comment

Most recent post

Panoramas from the past ...

In 1997, my then girlfriend (now wife) and I went camping in Death Valley. It was our fourth trip there to camp in grad. school. I brought m...