MHT CET Physics question
A body cools at the rate of 3°C/min, when its temperature is 50°C. If the temperature of its surroundings is 25°C, then the rate of cooling of the body at 40°C will be
Answer: (D)
Solution
Rate is proportional to the excess: at 50°C the excess is 25°C and at 40°C it is 15°C, so rate
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