Newton's Law of Cooling

Numerical Examples:

We will encounter this same exponential function in a w-i-d-e variety of seemingly unconnected situations.

Tsurf is the temperature of the surface of the object. Tsrnd is the temperature of the surroundings. T is the difference in temperature between the initial temperature of the object and its surroundings.

Here is an alternate solution to this same problem (altho' I think the previous solution is more straightforward):

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(c) 2005, Doug Davis; all rights reserved