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A sphere has a surface area of 1.0 m^(2)...

A sphere has a surface area of `1.0 m^(2)` and a temperature of 400 K and the power radiated from it is 150 W. Assuming the sphere is black body radiator. The power in kilowatt radiated when the area expands to `2.0 m^(2)` and the temperature changes to 800 K

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