A Person Eats A Dessert That Contains 280 Calories This Calorie Unit With A Capi

A person eats a dessert that contains 280 Calories. (This “Calorie” unit, with a capital C, is the one used by nutritionists; 1 Calorie = 4186 J. See Section 12.7.) The skin temperature of a person is 36 °C and that of her environment is 22 °C. The emissivity of her skin is 0.75 and its surface area is 1.3 m2. How much time would it take for her to emit a net radiant energy from her body that is equal to the energy contained in this dessert?

Prof. Angela

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