3 June 2015

This Will Make You Sit Down and Think For A While

Posted by Dan Satterfield

5209066661_e4df068ae9_bI spotted this video thanks to Joe Hanson at It’s OK To Be Smart. He said after watching it that he needed to sit down and think for a while. I love reading about relativity, but i agree with Joe! 

To get you to watch the 10 minute video, a question: You have identical watches, one you wind up and is running the other is not. Do they have the same mass? (Answer is NO)