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MMLU-Pro / 10286 / The emissivity of tungsten is approximately 0.35. A tungsten sphere 1 cm in…

Problem

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question

The emissivity of tungsten is approximately 0.35. A tungsten sphere 1 cm in radius is suspended within a large evacuated enclosure whose walls are at a temperature of 300 °K. What power input is required to maintain the sphere at a temperature of 3000 °K, if heat conduction along the supports is neglected?

category

physics

options

  1. 2400 watts
  2. 1000 watts
  3. 1700 watts
  4. 2020 watts
  5. 3200 watts
  6. 1500 watts
  7. 1800 watts
  8. 2250 watts
  9. 2500 watts
  10. 2750 watts

src

stemez-Optics

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