Questions
A bucket fulI of hot water cools from 75oC to 70oC in time T1, from 70oC to 65oC in time T2 and from 65oC to 60oC in time T3, then
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Correct option is C
According to Newton's law of coolingRate of cooling ∝ Mean temperature difference⇒ Fall in temperature Time ∝θ1+θ22−θ0∵ θ1+θ221>θ1+θ222>θ1+θ223⇒ T1Similar Questions
A body cools down from 60°C to 55°C in 30 s. Using Newton’s law of cooling, calculate the approximate time taken by same body to cool down from 5 5°C
to 50°C. Assume that the temperature of surroundings is 45°C.
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