In an electrically heated home, the temperature of the

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In an electrically heated home, the temperature of the ground in contact with a concrete basement wall is 12.8 8C. The temperature at the inside surface of the wall is 20.0 8C. The wall is 0.10 m thick and has an area of 9.0 m2 . Assume that one kilowatt ? hour of electrical energy costs $0.10. How many hours are required for one dollars worth of energy to be conducted through the wall?

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