Liquid N2 + ping pong balls + hi-speed cam = SLOMO boomhappy funtime

While it definitely lacks the low-budget charm of this nearly identical classroom presentation, this demonstration of liquid nitrogen's explosive potential does have two major things going for it. One: more ping pong balls. Two: A high-speed camera, for slowmo playback goodness.

As hosts Mauricio and David explain in the video, a mole of nitrogen in its gaseous phase takes up WAY more volume than it does in its liquid phase, so confining, say, a cup and a half of liquid N2 to a container that can't handle a rapid spike in pressure has some pretty explosive consequences.


You'll want to skip to around the 1:15 mark for the business.

[Distort via Laughing Squid]

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Corpore Metal

I think I prefer the Plymouth University Demonstration a little better. And it had a little slow motion too.