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Rate of cooling  dt  of a body depends upon  

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a
Nature of surface of the body
b
Temperature of body and surroundings
c
Mass and Specific heat of the body
d
All the above

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detailed solution

Correct option is D

dQdt=KAθ−θolmsdθdt=KAθ−θoldθdt=KAθ−θol

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A calorimeter of mass 0.2 kg and specific heat 900 J/kg/K. Containing 0.5 kg of a liquid of specific heat 2400J/kg/K. Its temperature falls from 600C to 550C in one minute. Find the rate of cooling.


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