Talk:Mpemba effect
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It'd be nice if someone could expand this a little bit.. Suppafly 04:11, 16 Jul 2004 (UTC)
- Simply it is goofball physics. An exact time can be calculated for the cooling rate of water, and it is related to its heat capacity. Also, a cooling rate can be calculated for any material, based on that material's heat capacity. So the falacy comes from the lack of validity of comparison of samples, IE.!, all the sheise gehabt different heat capacities, so different cooling rates...and yuck I hate refrozen ice cream, makes me wanna barf.
- --Hard Raspy Sci 07:36, 21 Feb 2005 (UTC)
- P.S. Have a nice day!
- Goofball it would seem. But, calculations with thermodynamic data do not equate to experimental results w/ impure samples and such. If this has been disproven countless times, then surely you can provide specific references to experimental results rather than just waving the weasel phrases. Experimental results with "pure water" or tap water or ??? Don't need the orange disclaimer - just references to back up the statement. -Vsmith 11:58, 21 Feb 2005 (UTC)
Hmmm...
(William M. Connolley 21:28, 18 Sep 2004 (UTC)) Some of this seems very odd. I can't understand how the supercooling question can still be open: you just stick in a thermometer into both to find out. Ditto several other possibilities. Only a fairly determined effort not to do the right experiments could stop even a half-well-equipped lab finding out.
- This particular information was taken from the Usenet Physics FAQ. You may wish to redirect your question to a forum like sci.physics, for which the FAQ was written. Derrick Coetzee 04:28, 19 Sep 2004 (UTC)
- (William M. Connolley 08:55, 19 Sep 2004 (UTC)) I've read the physics FAQ, which as you say is the source of the info. I still say its odd: the physics FAQ doesn't address my point above. Subsequently I've read the Auerbach abstract which makes things a bit clearer.
Why
Why was the paragraph on Mpemba not being the first to discover the fact that hot water can freeze faster than cold deleted? It did contain new information; it corrected and explain futher the fact that Mpemba didn't discover the phenomenon just introduced it to the modern sci. community (rediscovered). The first paragraph states the Mpemba discovered it and gives no credit to the fact that it was know before Mpemba. Please Consider undoing this edit.
I remember reading this was disproved
But I googled for data and apparently there are indeed several mechanisms that can cause not only the apparent freezing of hot water faster but also under certain conditions the actual freezing of an equal amount of formerly hotter water faster. Weird but true. 4.250.33.91 14:25, 15 May 2005 (UTC)