# Radiation (Stefan's law)

Assuming your skin temperature is 37.2°C and the temperature of your surroundings is 21.9°C, determine the length of time required for you to radiate away the energy gained by eating a 293 Calorie ice cream cone. Let the emmissivity of your skin be 0.915 and its area be 1.22 m2.

_________ hours

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According to Stefan's law, the amount of heat energy lost per sec, per unit area of a hot body is given by: E = Єσ(T4 - To4) ...

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