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The emissivity of tungsten is 0.350. A tungsten sphere with radius 1.81 cm is suspended within a large evacuated enclosure whose walls are at 319 K. What power input is required to maintain the sphere at 3,070 K if heat conduction along the supports is ignored? Express your answer in two decimal places and in terms of kilowatts. (Stefan-Boltzmann constant = 5.670374419..x10-8 w-m-2.K¯4.)

The emissivity of tungsten is 0.350. A tungsten sphere with radius 1.81 cm is suspended within a large evacuated enclosure whose walls are at 319 K. What power input is required to maintain the sphere at 3,070 K if heat conduction along the supports is ignored? Express your answer in two decimal places and in terms of kilowatts. (Stefan-Boltzmann constant = 5.670374419..x10-8 w-m-2.K¯4.)

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The emissivity of tungsten is 0.350. A tungsten sphere with radius 1.81 cm is suspended within a large evacuated enclosure whose walls are at 319 K. What power input is required to maintain the sphere at 3,070 K if heat conduction along the supports is ignored? Express your answer in two decimal places and in terms of kilowatts. (Stefan-Boltzmann constant = 5.670374419...×10-8 W-m-2.K4.)
Transcribed Image Text:The emissivity of tungsten is 0.350. A tungsten sphere with radius 1.81 cm is suspended within a large evacuated enclosure whose walls are at 319 K. What power input is required to maintain the sphere at 3,070 K if heat conduction along the supports is ignored? Express your answer in two decimal places and in terms of kilowatts. (Stefan-Boltzmann constant = 5.670374419...×10-8 W-m-2.K4.)
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