West Carter liquid nitrogen demonstration
Channel: Alan Kuehner
Date: 2013-03-09

I did a liquid nitrogen program for the West Carter Middle School science club culminating in this demonstration.  One of the students made this video.  Here is what is happening.  I put a few ml of liquid nitrogen in a 2 liter pop bottle, put the cap on tight, dropped it in a container that had and inch or so of water, and put a 5 gallon bucket over the whole works.  It took about 15 seconds for the pressure to build up to the point that the bottle burst throwing the bottle more than 35 feet into the air.  Counting frames we measured it's time in the air at 3.2 seconds.  
Go to bit.ly/cryogenics for more liquid nitrogen experiments.