Steel balls (diamęter = 21 mm, p= 7833 kg/m , k = 54 W/m-°C, Cp = 0.465 kJ/kg-°C, and a = 1.474x10 m /s) are annealed by heating them first to 870°C in a furnace and then allowing them to cool slowly to 85°C in ambient air at 27°C. The average heat transfer coefficient is 69.9 W/m¯.°C. How long the annealing process will take (in Seconds)?
Steel balls (diamęter = 21 mm, p= 7833 kg/m , k = 54 W/m-°C, Cp = 0.465 kJ/kg-°C, and a = 1.474x10 m /s) are annealed by heating them first to 870°C in a furnace and then allowing them to cool slowly to 85°C in ambient air at 27°C. The average heat transfer coefficient is 69.9 W/m¯.°C. How long the annealing process will take (in Seconds)?
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Steel balls (diamęter = 21 mm, p= 7833 kg/m' , k = 54 W/m-°C, Cp = 0.465 kJ/kg-°C, and
a = 1.474x10 m/s) are annealed by heating them first to 870°C in a furnace and then
allowing them to cool slowly to 85°C in ambient air at 27°C. The average heat transfer
coefficient is 69.9 W/m .°C. How long the annealing process will take (in Seconds)?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcc636639-4ff1-4dcb-8a53-7ccf3921f5cc%2F0c1b4558-792f-4e2f-be25-029da0704721%2Fhmhxlua_processed.jpeg&w=3840&q=75)
Transcribed Image Text:3
Steel balls (diamęter = 21 mm, p= 7833 kg/m' , k = 54 W/m-°C, Cp = 0.465 kJ/kg-°C, and
a = 1.474x10 m/s) are annealed by heating them first to 870°C in a furnace and then
allowing them to cool slowly to 85°C in ambient air at 27°C. The average heat transfer
coefficient is 69.9 W/m .°C. How long the annealing process will take (in Seconds)?
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