Received from cdb at 09/25/11 00:36 UTC:

>You pour equal quantities of hot tea into identical cups.
>
>After pouring cold milk into cup A, the phone rings. You chat for two
>minutes then pour the same quantity of equally cold milk into cup B.
>
>Which cup is now hotter, or are they the same?
>
>(I got this off the ABC website).
>
>Colin
>--
>cdb,  on 25/09/2011


Cup B will be cooler because it was much hotter then B for two=20
additionalminutes and rate of heat loss is a function of temperature=20
difference.  So cup B lost more heat during that 2 minutes than cooler cup =
A=20
did, so when milk of the same temp as added to cup A was added to B it beca=
me=20
cooler than A.  So B is cooler.

Jim H=20


--=20
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