Heat TransferHard
Question
The temperature of a perfect black body is 727oC and its area is 0.1 m2. If stefan′s constant = 5.67 × 10-8 watt/m2−s−k4, then heat radiated by it in 1 min. is :
Options
A.8100 cal
B.81000 cal
C.810 cal
D.81 cal
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