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MMLU-Pro / 11788 / The inner sphere of a Dewar flask containingliquified oxygenis 1.2 ft diameter…

Problem

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question

The inner sphere of a Dewar flask containingliquified oxygenis 1.2 ft diameter and the outer sphere is 1.8 ft diameter. Both spheres are plated for which \epsilon = 0.04. Determine the rate at which liquid oxygen would evaporate atits boiling point - 297°F when the outer sphere temperatureis 25°F. Assume other modes of heat transfer areabsent except radiation.

category

engineering

options

  1. - 11.37 Btu/hr
  2. - 8.37 Btu/hr
  3. - 12.37 Btu/hr
  4. - 10.37 Btu/hr
  5. - 9.37 Btu/hr
  6. - 7.37 Btu/hr
  7. - 14.37 Btu/hr
  8. - 16.37 Btu/hr
  9. - 15.37 Btu/hr
  10. - 13.37 Btu/hr

src

stemez-HeatTransfer

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