In this problem you will consider the balance of thermal energy radiated and abs

Question

In this problem you will consider the balance of thermal energy radiated and absorbed by a person. Assume that the person is wearing only a skimpy bathing suit of negligible area. As a rough approximation, the area of a human body may be considered to be that of the sides of a cylinder of length L = 2.0 m and circumference C = 0.8 m. For the Stefan-Boltzmann constant use 5.67051*10^-8 1) If the surface temperature of the skin is taken to be T=30 C, how much thermal power (P_rb) does the body described in the introduction radiate? Take the emissivity to be e = 0.6. 2) Find P_net, the net power radiated by the person when in a room with temperature T= 20 C.

Explanation / Answer

rate my answer first (fully solved) E= 5.67*10^-8 * C* L (373^4 - 293^4) c=0.8 l=2 a) E= 1087.44 b) E= 1087.44*0.6=652.46

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