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MMLU-Pro / 11471 / A droplet of molten lead of average 1/8 india, at 750°F, falls froma height of…

Problem

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question

A droplet of molten lead of average 1/8 india, at 750°F, falls froma height of 60 ft, and solidifies by the cooling effect of thesurrounding air. The surrounding temperature is 70°F. If thelead solidifies at 621°F, calculate the coefficient of heat transfer. For lead, C_p= 0.031 Btu/lbm-°F \rho= 710lbm/ft^3 h_fusion= 10.6 Btu/lbm

category

engineering

options

  1. 59.2 Btu/hr-ft^2-°F
  2. 45.7 Btu/hr-ft^2-°F
  3. 52.8 Btu/hr-ft^2-°F
  4. 63.4 Btu/hr-ft^2-°F

src

stemez-HeatTransfer

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