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Thermal Physics

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15 Mar 2010 17:47:30 IST

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what is newtons law of cooling?

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what is newtons law of cooling?

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THE GREAT

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15 Mar 2010 18:03:42 IST

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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).

Krishna Gopal Singh

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15 Mar 2010 21:00:13 IST

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Consider a body at temperature T kept in a surrounding of temperature Ta. Then rate of cooling of the body is proportional to (T-Ta)

dT/dt = -k(T-Ta)

where k is a constant that depends on system properties.

If at t = 0 temperature of body is To then at any other time t the temperature of body T is given by

T-Ta = (To-Ta)*exp(-kt)

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