Reconsider Prob. 996. Using EES (or other) software, plot the rate of natural convection heat transfer as

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Reconsider Prob. 9–96. Using EES (or other) software, plot the rate of natural convection heat transfer as a function of the hot surface temperature of the sphere as the temperature varies from 250 K to 450 K, and discuss the results.

Data from problem 96

Two concentric spheres of diameters 15 cm and 25 cm are separated by air at 1 atm pressure. The surface temperatures of the two spheres enclosing the air are T1 = 350 K and T2 = 275 K, respectively. Determine the rate of heat transfer from the inner sphere to the outer sphere by natural convection.

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