Brass cube "p 8530 kg/m, c = 380 J/kg.°C, k 110 W/m.°C, a = 33.9E-6 W/m.°C", side length=9 mm, are annealed by heating them first to 881°C in a furnace and then allowing them to cool slowly to 130°C in ambient air at 28°C. If the average heat transfer coefficient is 13.7 W/m .C, If 2642 balls are to be annealed per hour, what is the total rate of heat transfer (watts) fromn the balls to the ambient air?
Brass cube "p 8530 kg/m, c = 380 J/kg.°C, k 110 W/m.°C, a = 33.9E-6 W/m.°C", side length=9 mm, are annealed by heating them first to 881°C in a furnace and then allowing them to cool slowly to 130°C in ambient air at 28°C. If the average heat transfer coefficient is 13.7 W/m .C, If 2642 balls are to be annealed per hour, what is the total rate of heat transfer (watts) fromn the balls to the ambient air?
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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Transcribed Image Text:Brass cube "p = 8530 kg/m, c = 380 J/kg.°C, k = 110 W/m.°C, a
33.9E-6 W/m.°C", side length=9 mm, are annealed by heating them
first to 881°C in a furnace and then allowing them to cool slowly to
130°C in ambient air at 28°C. If the average heat transfer coefficient is
13.7 W/m .°C, If 2642 balls are to be annealed per hour, what is the
total rate of heat transfer (watts) from the balls to the ambient air?
Select one:
O A 1355.75
O B. 1302.35
O C. 1246.35
O D. 1405.24
O E. 1462.54
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