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A cold-weather sleeping bag uses goose down to keep the inside warm. The rate at which...

A cold-weather sleeping bag uses goose down to keep the inside warm. The rate at which a sleeping camper generates heat energy is about 69 W. Calculate the temperature of the air inside the bag and around the camper when the outside temperature of the bag is 0°C. (Assume that the sleeping bag has a surface area of about 4.8 m2 and a thickness of 4.4 cm.)

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Answer #1

We have the equation for heat flow, dokA dt d The thermal conductivity is k = 0.0285 W/m-K Now substituting, 69= 0.0285x4 8,7

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