An electrically powered, ring-shaped radiant heating

Chapter , Problem 12.32

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An electrically powered, ring-shaped radiant heating element is maintained at a temperature of Th 3000 K and is used in a manufacturing process to heat a small part having a surface area of Ap 0.007 m2 . The surface of the heating element may be assumed to be black. For 1 30 , 2 60 , L 3 m, and W 30 mm, what is the rate at which radiant energy emitted by the heater is incident on the part? 12.3

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