> That's exactly the problem with the question. There's too many uncertaint=
ies
> and variables left out. Initial temperatures aren't provided, etc. But fo=
r
> its purpose, I don't think it's meant to be complicated.

Hotter fluids cool faster than cooler fluids.
Colour makes a difference to radiation rate and maybe to convection rate.
Effects seem to go in the same direction, but arguments arise over
this among people who think they understand the issues.


   R
--=20
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