Multiple-Concept Example 8 reviews the approach that is used in problems such as this. A person eats a dessert that contains 240 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 the person is 36 \"C and that of her environment is 16 \"C. The emissivity of her skin is 0.67 and its surface area is 1.2 m2. How many hours would it take her to emit a net radiant energy from her body that is equal to the energy contained in this dessert? Heat from CI'WIIOI'II'TlCFIl \\ . A/ In Hedtfrom 4 person 4" N J \\ Number n Units v In an electrically heated home. the temperature of the ground in contact with a concrete basement wall is 13.4 C. The temperature at the inside surface of the wall is 19.4 0C. The wall is 0.18 m thick and has an area of 6.1 m2. Assume that one kilowatt hour of electrical energy costs $0.10. How many hours are required for one dollar's worth of energy to be conducted through the wall? Number n Units v In an aluminum pot, 0.861 kg of water at 100 C boils away in four minutes. The bottom of the pot is 3.14 >