Friday, March 04, 2011

You can safely stick your hand in liquid nitrogen…but you probably shouldn’t.

As Grey explains, he's protected by the Leidenfrost Effect, in which a liquid that comes into contact with something much hotter than itself forms an insulating layer of vapor to prevent the liquid from immediately boiling. (You can read all about the Leidenfrost Effect in our primer on the subject.) This vapor layer provided short-term protection for his hand against the dangerously cold liquid nitrogen, allowing him to safely place his hand in the liquid nitrogen again and again - although only for a split-second each time.

Details here.

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