In 2013-2014 we had a cold day off both today and tomorrow.  The below is my student teacher Mr. Flash teaching in 2012-2013

If you missed today watch the videos below and complete the Pile Driver Lab from your periods data below.
Period 1      Period 4        Period 5        Period 7        Period 8

If you had a question about the 3rd calculation, check this out

Inplosion videos:  We used a powerful vacuum pump to suck the air out of a long tube with a ping pong ball waiting for us to poke a hole in the tape holding the vacuum on the ping pong balls side so the rush of air can push the ball into and through the target (which is three aluminum cans).