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If the sphere is enclosed in a room whose walls are kept at

(a) How much power is radiated by a tungsten sphere (emissivity e = 0.35) of radius 21 cm at a temperature of 28°C?

______W

(b) 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?

______W

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Physics: If the sphere is enclosed in a room whose walls are kept at

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