Physics:Newton's Apple（2）
On this episode of Newton's Apple， we shall find answers to three questions: First， Dave Huddleston will go to the circus to find out how high-wire walkers stay up. Second， Stacey Olsen from the University of Pennsylvania Museum will reveal the hidden secrets of mummies for us. And third， how do bug sprays work?
- Added：2006
- Country：America
- Duration：30
- Time of update：2011/8/16 10:07:30