Homes are often insulated with fiberglass insulation in their walls and ceiling. the thermal conductivity of fiberglass is 0.040 w/(m? k).suppose that the total surface area of the walls and roof of a windowless house is 470m2 and that the thickness of the insulation is 17cm .at what rate does heat leave the house on a day when the outside temperature is 30 ? c colder than the inside temperature?
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