Question: 1 2 1 4 4 Consider a 4 - cm - diameter and 6 - cm - long cylindrical rod at 1 2 0 0

12144 Consider a 4-cm-diameter and 6-cm-long cylindrical rod at 1200 K. If the emissivity of the rod surface is 0.75, the total amount of radiation emitted by all surfaces of the rod in 20 min is (a)88 kJ (b)118 kJ (c)6661 kJ (d)1064 kJ (e)1418 kJ

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