A winter hiker's body generates heat at a rate up to a maximum value of 120 W. She is hiking on a brisk day in which the outdoor temperature is -10C, while wearing a jacket with goose-down insulation. How thick must the jacket be so that she can maintain a normal body temperature? Assume her area for heat flow is 1.5m and that all her body heat flows through her jacket. 

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To determine the thickness of the jacket required for the hiker to maintain a normal body temperatur... View the full answer