Calculate the number of hours necessary for 1$ worth of energy to be conducted along the wall? Let's say that 1(one) kilowatt hour of electrical energy costs $0.10. The temperature of the floor in relation with a concrete wall is 12.8*C. The temperature at the inside surface of the wall is 20.0*C. The wall is 0.10 meter thick and has an area of 9.0 m^2.
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