Estimate the power radiated by the human body. Be sure to state the estimated va

Question

Estimate the power radiated by the human body. Be sure to state the estimated values of all relevant quantities. You need only outline your calculations.  How does this value compare with the average caloric intake for humans?  (Note: Human caloric intake ~ 2,000 Calories/day ~ 8,000,000 Joules/day.)  See page 81 (78 in the 2nd Ed) of your text for the relevant equations.

You might find a surprisingly high number.  It would be an appropriate answer if you were in deep space away from all other radiating bodies.  A value more appropriate for on Earth can be found by accounting for radiation received by the body.  The version of Eq 3.28 that accounts for this is I = ?(T4 - T4env), where Tenv is the absolute temperature of the environment.

Explanation / Answer

At rest, the average adult human radiates heat energy of approximately 600 BTU/hr.

= 151295 Calories

An average man needs around 2,500 calories a day to maintain his weight

interstingly the radiated energy is more than intake energy

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