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The Leidenfrost Effect

The Leidenfrost Effect. It's the reason that water droplets don't instantly evaporate off of a hot plate between 200 and 300 deg C. Another obscure physical phenomenon? Perhaps - except for Jearl Walker, the physicist who uses it for some awesome demonstrations: sticking your hand into molten lead, walking on hot coals and gargling with liquid nitrogen.
posted by GuyZero on Nov 18, 2005 - 30 comments

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