1.

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, = 5.67*10-8W/ m2K4 & emissivity of 0.4).

A. 122.4W
B. 0.47W
C. 33W
D. 86W
Answer» B. 0.47W


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