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A body which has a surface area 5.0 cm^(...

A body which has a surface area `5.0 cm^(2)` and a temperature of `727^(@)C` radiater 300 J energy each minute. What is its emissivity? Stefan's Boltzmann's constat is `5.76 xx 10^(-8) Wm^(-2)K^(-4)`.

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The correct Answer is:
0.18
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