Question

24. A small-blackened solid copper
sphere of radius 2.5 cm is placed in an
evacuated chamber. The temperature of
the chamber is maintained at 100 °C. At
what rate energy must be supplied to the
copper sphere to maintain its temperature
at 110 °C? (Take Stefan's constant o to
be 5.76 x 10-8 J sm2 K-4 and treat the
sphere as blackbody.)
[Ans: 0.962 W​

Answer 1

Answer:0.9645 W

Explanation:

Answer 2

Answer:

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