Suppose the insulating qualities of the wall of a house come mainly from a 4.0-in. layer of brick and an R-19 layer of insulation
What is the total rate of heat loss through such a wall, if its total area is 160 ft2 and the temperature difference across it is 34 F∘ ?
Express your answer to two significant figures and include the appropriate units.
Answer: The total rate of heat loss through such a wall is 80 W.
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