Physics:Newton's Apple（3）
On this episode of Newton's Apple， we shall find answers to three questions: First， why was the great Maya civilization suddenly disappeared 700 years ago? Second， Dave will explore the ear with Doctor Lisa Hunter from the audio center of the University of Minnesota. And third， how does a parachute work?
- Added：2006
- Country：America
- Duration：30
- Time of update：2011/8/16 10:08:43