The emissive power of a sphere of area0.02 m? is 0.5 kecal s' m™. What is the amount of heat radiated by the spherical surface in 20 second? - VgyanHub

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21. The emissive power of a sphere of area0.02 m? is 0.5 kecal s’ m™. What is the amount of heat radiated by the spherical surface in 20 second?

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