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How much power is radiated by a tungsten sphere (emissivity = 0.35) of radius 19 cm at a temperature of 26 C? If the sphere

How much power is radiated by a tungsten sphere (emissivity = 0.35) of radius 19 cm at a temperature of 26 C? If the sphere is enclosed in a room whose walls are kept at -5 C, what is the net flow rate of energy out of the sphere?

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