Question: How much power is radiated by a tungsten sphere ( emissivity = 0 . 3 5 ) of radius 2 0 cm at a temperature

How much power is radiated by a tungsten sphere (emissivity =0.35) of radius 20 cm at a temperature of 22C? If the sphere is enclosed in a room whose walls are kept at -5C, what is the net flow rate of energy out of the sphere?

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