1.

The thermal radiative flux from a surface of emissivity = 0.4 is 22.68 kW/m2 . The approximate surface temperature (K) is (Stefan-Boltzmann constant = 5.67 10-8 W/m2 .K4 )

A. 1000
B. 727
C. 800
D. 1200
Answer» B. 727


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