n iron ball (p 7833 ,k = 54. °C , Cp = 0,465.°C) has a diameter of 8 m3 kg m he ball initially has a temperature of 900°C, Then, the ball is cooled through the ling process at an ambient temperature of 35°C. The final temperature of the ball he annealing process is 100°C. convection coefficient between the sphere and its surroundings is 75 .°C , then m2

Elements Of Electromagnetics
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I have a question in my homework related Heat Transfer lesson. The following below is my question. Please Advice. Thank You

 

Carbon iron ball (p
= 7833
kg
54.°C , Cp = 0,465.°C) has a diameter of 8
kg
,k
m3
mm. The ball initially has a temperature of 900°C, Then, the ball is cooled through the
annealing process at an ambient temperature of 35°C. The final temperature of the ball
after the annealing process is 100°C.
If the convection coefficient between the sphere and its surroundings is 75
W
°C , then
how long does it take for the annealing process?
m2
Transcribed Image Text:Carbon iron ball (p = 7833 kg 54.°C , Cp = 0,465.°C) has a diameter of 8 kg ,k m3 mm. The ball initially has a temperature of 900°C, Then, the ball is cooled through the annealing process at an ambient temperature of 35°C. The final temperature of the ball after the annealing process is 100°C. If the convection coefficient between the sphere and its surroundings is 75 W °C , then how long does it take for the annealing process? m2
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