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A spherical ball oof surface area 20cm^(...

A spherical ball oof surface area `20cm^(@)` absorbs any radiation that falls on it. It is susoended in a closed box maintained at `57^(@)C` . (a) Find the amount of radiation falling on the ball per second. (b0 Find the net rate of heat flow to or from the ball at an instant when its temperature is `200^(@)C` . Stefan constant `=6.0xx10^(-s)Wm^(-2)K^(-4)` .

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