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Re:Cooling a cup of coffee with help of a spoon by maxbRuns on Thursday February 17, 2011 @07:48AM (#2230708)
Yeah, that's interesting. I always do it the same way as you, but I decided to do a quick analytical calculation. I wrote it up here:

http://maxbrunsfeld.wordpress.com/2011/02/17/on-the-mixing-o...

my result agrees with your intuition.

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