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What is the net amount of energy per unit time being received by a body having a temperature of 40 °C in a surrounding of 60°C? The surface area of body = 2m2, σ= 5.67*10-8W/ m2K4 & emissivity of 0.4.

a) 122.4W

b) 0.47W

c) 33W

d) 86W

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