A metal ball of surface area 200cm2 and temperature 5270C is surrounde – InterviewSolution

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1.	A metal ball of surface area 200cm2 and temperature 5270C is surrounded by a vessel at 270C. If the emissivity of the metal is 0.4, then the rate of loss of heat from the ball is σ=5.67×10−8J/m2−s−k4
Answer» A metal ball of surface area $200 c m^{2}$ and temperature $527^{0} C$ is surrounded by a vessel at $27^{0} C .$ If the emissivity of the metal is 0.4, then the rate of loss of heat from the ball is $σ = 5.67 \times 10^{- 8} J / m^{2} - s - k^{4}$

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