Question: (a) How much power is radiated by a tungsten sphere (emissivity e = 0.35) of radius 22cm at a temperature of 25oC? (b) If the

(a) How much power is radiated by a tungsten sphere (emissivity e = 0.35) of radius 22cm at a temperature of 25oC?
(b) If the sphere is enclosed in a room whose walls are kept at – 5oC, what is the net flow rate of energy out of the sphere?

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