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With a radius of 1cm, A iron sphere is heated to 999 degrees C.   If we...

With a radius of 1cm, A iron sphere is heated to 999 degrees C.   If we Assume iron has an emissivity of 0.68, what is the power radiated by the iron sphere if it is placed in a room temperature environment? How many 100 Watt light bulbs would you need to generate the same amount of power?

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