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1. How much heat is conducted in 24 hours through a pane of glass 15 ft^2 in area and 3/16 inch thick if the surface temperatures are 60 degree F and 10 degree F?

2. How much heat is conducted in 24 hours through a solid concrete building wall 8 inches thick and 400 ft^2 in area if the surface temperatures are 60 degree F and 30 degree F?

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