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Andy Resnick
#2
Dec8-09, 05:56 PM
Sci Advisor
P: 5,513
I'm voting for nucleation- although fast changes in pressure can set off nucleation events.

http://www.youtube.com/watch?v=YuPfsAdEG2E

Note- you can do a similar experiment (superheating) in the microwave. Be *very* careful.

http://www.youtube.com/watch?v=1_OXM4mr_i0