A person is loosing thermal energy through the skin at a rate of 120W when his s

Question

A person is loosing thermal energy through the skin at a rate of 120W when his skin temperature is 30C. He puts on a sweater, and his skin temperature rises to 33C. The effective thermal conductivity between his core and the environment changes from 0.22W/m.K to 0.18W/m.K. At what rate is he now loosing thermal energy? A person is loosing thermal energy through the skin at a rate of 120W when his skin temperature is 30C. He puts on a sweater, and his skin temperature rises to 33C. The effective thermal conductivity between his core and the environment changes from 0.22W/m.K to 0.18W/m.K. At what rate is he now loosing thermal energy? A person is loosing thermal energy through the skin at a rate of 120W when his skin temperature is 30C. He puts on a sweater, and his skin temperature rises to 33C. The effective thermal conductivity between his core and the environment changes from 0.22W/m.K to 0.18W/m.K. At what rate is he now loosing thermal energy?

Explanation / Answer

On putting the sweater ,the thermal conductivity decreases so temp difference increases but heat rate still remain 120 W and so the rate at which he is loosing energy is 120 W .

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