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=2.0m and circumference C=0.8m.
For the Stefan-Boltzmann constant use σ=5.67x10-8W/m2/K4.
A ) If the surface temperature of the skin is taken to be Tbody=30oC, how much thermal power Prb does the body described in the introduction radiate?
Take the emissivity to be e=0.6.
Express the power radiated into the room by the body numerically, rounded to the nearest 10 W.
B) Find Pnet, the net power radiated by the person when in a room with temperature Troom=20oC. Express the net radiated power numerically, to the nearest 10 W.