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State Newton's law of cooling....

State Newton's law of cooling.

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Newton.s law of cooling states that the rate of loss heat of a body is directly proportional to the mean excess of temperature of the body over surroundings. This law is valid only up to `30^@ C` temperature difference. Also, the loss of heat by radiation depends upon the nature of the surface of the body and the area of the exposed surface.
Rate of cooling `(delta theta)/(dt) prop (theta - theta_(0))`
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