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The surface area of an adult human is about 1.8 m^2. Suppose a person with a skin temperature of 34C is standing nude in a room where the air is 25C but the walls are 17C.

There is a "dead-air" layer next to your skin that acts as insulation. If the dead-air layer is 5.0mm thick, what is the person's rate of heat loss by conduction?

What is the person's net radiation loss to the walls? The emissivity of skin is 0.97.

Does conduction or radiation contribute more to the total rate of energy loss?

If the person is metabolizing food at a rate of 160W, does the person feel comfortable, chilly, or too warm?

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  • Category:- Physics
  • Reference No.:- M91050553

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