Questions
In a room, where the temperature is 300C, a body cools from 610C to 590C in 4 min. The time taken by the body to cool from 510C to 490C will be [MP PMT 2013)
detailed solution
Correct option is C
According to Newton's law of cooling,61−594=K61+592−30⇒ 24=K×30 Similarly, 51−49t=K51+492−30⇒ 2t=K×20Solving Eqs. (i) and (ii), we gett = 6 minTalk to our academic expert!
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A calorimeter of mass 0.2 kg and specific heat 900 Containing 0.5 kg of a liquid of specific heat 2400J/kg/K. Its temperature falls from
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