A student is wearing wool clothing of 0.850 cm thick to keep warm. Her skin temperature is 35.5 °C and the outside temperature is 4.20 °C. Her body surface area is 1.19 m2 . (a) If the thermal conductivity of wool is 5.50×10–2 W/(m.K), calculate the rate of heat conduction through her clothing. (b) Assume the emissivity of the student is 0.980, calculate the rate of energy radiated to the surroundings with temperature of 26.7 °C.
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