Answered: A 5-in-diameter spherical ball is known…

A 5-in-diameter spherical ball is known to emit radiation at a rate of 550 Btu/h when its surface temperature is 950 R. Determine the average emissivity of the ball at this temperature.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter11: Heat Transfer By Radiation

Section: Chapter Questions

Problem 11.32P

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Question

A 5-in-diameter spherical ball is known to emit
radiation at a rate of 550 Btu/h when its surface temperature
is 950 R. Determine the average emissivity of the ball at this
temperature.

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