The top layer of your goose down sleeping bag has a thickness of 5.5 cm and a surface area of 1.0 m2 . when the outside temperature is -18 โc you lose 24 cal/hr by heat conduction through the bag (which remains at a cozy 35 โc inside). assume that you're sleeping on an insulated pad that eliminates heat conduction to the ground beneath you. (note: 1 cal = 4184 j)
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The top layer of your goose down sleeping bag has a thickness of 5.5 cm and a surface area of 1.0 m2...
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