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Questions  

Temperature of a body (θ) is slightly more than the temperature of the surrounding (θ0). Its rate of cooling (R) versus temperature of body (θ) is plotted. Its shape would be 

a
b
c
d

detailed solution

Correct option is B

According to Newton's law of cooling (R=−dθdt)R α Temperature difference ⇒R=C(θ−θ0)

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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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