HEAT TRANSFER
(to 3 sig figs) Ans: 30.4 MJ or 7.26 Mcal or 28900 Btu. Problem 3: A furnace wall is constructed of firebrick, 15 cm thick. The temperature of the inside wall is 700 (C and the temperature of the outside wall is 80(C. If the mean thermal conductivity is 0.57 W/m(K, calculate, to three sig figs, the rate of heat loss through 1.0 m2 of wall surface. ................
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