Newton´s Law of Cooling

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Main Question or Discussion Point

I know what this law says, but I don´t know where does it comes from. Could somone please help me with the derivation of this law?
Thanks in advance.
 

Answers and Replies

HallsofIvy
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It's purely a matter of experimental evidence- heat flows from a warmer body to a cooler one at a rate proportional to the difference in temperatures.
 
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OK Thanks.
 
mukundpa
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you may derive this law from Stefan's law of black body radiation with the approximation that the temperature difference between the body and surrounding is not much large.
 

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