If you were to walk briefly in space without aspacesuit, Ask an Expert

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If you were to walk briefly in space without aspacesuit while far from the Sun (as an astronaut does in the movie2001), you would feel the cold of space -- while youradiated energy, you would absorb almost none from yourenvironment. Assume that your emmisivity is 0.90, the surface areaof the average human body to be about 2 m2, and the skintemperature to be about 300 K.

(a) At what rate would you lose energy?

(b) How much energy would you lose in 35 s?

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