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Q: A composite wall separates combustion gases at 2600°C from a liquid coolant at 100°C, with gas- and liquid-side convection coefficients of 50 and 1000 W/m2 · K. The wall is composed of a l0-mm-thick layer of beryllium oxide on the gas side and a 20-mm-thick slab of stainless steel (AISI 304) on the liquid side. The contact resistance between the oxide and the steel is 0.05 m2 · K/W. What is the heat loss per unit surface area of the composite? Sketch the temperature distribution from the gas to the liquid.