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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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To find the emissivity of the body, we can follow these steps: ### Step 1: Convert the given surface area from cm² to m². Given surface area \( A = 5.0 \, \text{cm}^2 \). To convert cm² to m²: \[ A = 5.0 \, \text{cm}^2 \times \left( \frac{1 \, \text{m}}{100 \, \text{cm}} \right)^2 = 5.0 \times 10^{-4} \, \text{m}^2 ...
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