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Problem: A person having skin of surface area 1.85m² and temperature 30.0^oC is resting in an insulated room where the ambient air temperature is 20.0^oC. In this state, a person gets rid of excess heat by radiation.

Part A: By how much does the person change the entropy of the air in this room each second? (Recall that the room radiates back into the person and that the emissivity of the skin is 1.00.)

I don't know how to get that answer for the above problem. Please help! Thanks.

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