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Solution: A solid metal sphere has surface area 0.200 m 2 and an emiss...

Question

A solid metal sphere has surface area 0.200 m 2 and an emissivity of 0.700. The sphere is maintained at a temperature of 60.0°C and the surroundings are at a temperature of 30.0°C. The sphere's rate of heat loss by radiation is

(a) 0.100 W

(b) 154 W

(c) 97.6 W

(d) 43.9 W

(e) 30.7 W

(f) none of the above answers