Ball bearing ro=4 mm leaving the oven at a uniform temperature of 900 oC are exposed to air for a while before they are dropped in to the water for quenching . Determine the time they can stand the air before their temperature falls below 850 oC also find the total rate of heat transfer .Take for the balls k = 54 W/m .oC , ρ= 7833 kg/m3 , Cp=0.456 kJ/kg.oC
Ball bearing ro=4 mm leaving the oven at a uniform temperature of 900 oC are exposed to air for a while before they are dropped in to the water for quenching . Determine the time they can stand the air before their temperature falls below 850 oC also find the total rate of heat transfer .Take for the balls k = 54 W/m .oC , ρ= 7833 kg/m3 , Cp=0.456 kJ/kg.oC
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Ball bearing ro=4 mm leaving the oven at a uniform temperature of 900 oC are
exposed to air for a while before they are dropped in to the water for quenching .
Determine the time they can stand the air before their temperature falls below 850 oC
also find the total rate of heat transfer .Take for the balls k = 54 W/m .oC , ρ= 7833
kg/m3 , Cp=0.456 kJ/kg.oC
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