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2. A building wall has a surface area of 450 m and a thermal conductance of 0.7 W/m-K. The wall thickness is 20 cm.

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2. A building wall has a surface area of 450 m and a thermal conductance of 0.7 W/m-K. The wall thickness is 20 cm. The outside wall temperature is 0C during the winter and the inside wall surface is 22C. Calculate the heat flux through the wall. A. 60 W/m A radiant heat lam B. 77 W/m C. 70 W/m D. 67 W/m

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