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9a.1 A metal sphere with radius 0.100 m and emissivity 0.9 is at a temperature of 400 .C. The ambient temperature is 100 C. Calculate

9a.1 A metal sphere with radius 0.100 m and emissivity 0.9 is at a temperature of 400 .C. The ambient temperature is 100 C. Calculate the total power radiated by the sphere, in Watts. [Answer: 1191 W]

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