[extropy-chat] cool (was zombie boffins)
scerir
scerir at libero.it
Thu Jun 30 17:11:06 UTC 2005
Cool!
But what does it mean?
I'm supposing it has to do with
the Aristotle-Mpemba effect.
"The fact that water has previously been warmed
contributes to its freezing quickly;
for so it cools sooner. Hence many people,
when they want to cool hot water quickly,
begin by putting it in the sun. . ."
- Aristotle [in E.W.Webster, "Meteorologica I",
Oxford U.P., Oxford, 1923, 348b-349a]
It was called, by Aristotle, 'antiperistasis'.
"The supposed increase in the intensity of a quality
as a result of being surrounded by its contrary quality,
for instance, the sudden heating of a warm body
when surrounded by cold."
Long time ago a friend told Mpemba (a Tanzanian high
school student) that when making ice cream, he put
the hot liquids in the refrigerator to make them freeze
_faster_.
Mpemba found that other ice cream sellers in Tanga
had the same practice.
This is the Aristotle-Mpemba effect.
Mpemba, Osborne; "Cool"; Physics Education v.4,
p.172-5(1969)
(More references available)
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