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MHT CET Physics question

PhysicsThermal Properties of MatterMHT CET

A solid sphere cools at the rate of 2.8°C per minute, when its temperature is 127°C. Find the rate at which another solid copper sphere of twice the radius looses its temperature at 127°C, in both the cases, the room temperature is maintained at 27°C is

Answer: (D)

Solution

Rate of fall of temperature for the same material and temperatures, so

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Question ID VK-063064