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The Cooling Rate Of A Fluid Introduction As soon as a cup of hot coffee is poured, Newton's Law of Cooling states that the rate of change of the temperature of an object is proportional to the difference between its own temperature and the ambient temperature (i.e. the temperature of its surroundings). Stated simply mathematically: dy = k(y-C) dx Where y represents the object's temperature, x represents time, C is the surrounding temperature, and k is proportionality constant. By finding out how water cools we can determine when it is best to add milk to a cup of coffee to bring it to its optimal drinking temperature. Introduction to the theories behind the experiment Research is needed into the principles and theories behind any experiment before it is undertaken, so as it can be properly understood. A prediction for results can therefore be made, so as any anomalous results can be spotted. Research is also needed...

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