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Radiation from the head is a major source of heat loss from the human body. Model a head as a 21-cm-diameter, 20-cm-tall cylinder with a flat top. If the body's surface temperature is 35 ∘C, what is the net rate of heat loss on a chilly 7 ∘C day? All skin, regardless of color, is effectively black in the infrared where the radiation occurs, so use an emissivity of 0.95.
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Radiation from the head is a major source of heat loss from the human body. Model a head as a 21-cm-...
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