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A 8-cm diameter pipe is used to deliver hot water to a residence. A 6-m-long horizontal section of the pipe will pass through a large room of ambient temperature 20℃. The flow of hot water inside the pipe will maintain the outer surface temperature of the pipe at 72℃. If the water is flowing at 0.03 kg/s with an inlet temperature of 86oC, determine the outlet temperature of the water. The properties of air at the film temperature are as follows: k = 0.027 W/m.℃, ν = 17.5*10-6 m2/s, alpha= 25*10-6 m2/s Pr = 0.704, β= 1/Tf = 0.00313 K-1. Take cp,water=4.178 kJ/kgK

A 8-cm diameter pipe is used to deliver hot water to a residence. A 6-m-long horizontal section of the pipe will pass through a large room of ambient temperature 20℃. The flow of hot water inside the pipe will maintain the outer surface temperature of the pipe at 72℃. If the water is flowing at 0.03 kg/s with an inlet temperature of 86oC, determine the outlet temperature of the water. The properties of air at the film temperature are as follows: k = 0.027 W/m.℃, ν = 17.5*10-6 m2/s, alpha= 25*10-6 m2/s Pr = 0.704, β= 1/Tf = 0.00313 K-1. Take cp,water=4.178 kJ/kgK

Elements Of Electromagnetics
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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A 8-cm diameter pipe is used to deliver hot water to a residence. A 6-m-long horizontal section of the pipe will pass through a large room of ambient temperature 20℃. The flow of hot water inside the pipe will maintain the outer surface temperature of the pipe at 72℃. If the water is flowing at 0.03 kg/s with an inlet temperature of 86oC, determine the outlet temperature of the water. The properties of air at the film temperature are as follows: k = 0.027 W/m.℃, ν = 17.5*10-6 m2/s, alpha= 25*10-6 m2/s Pr = 0.704, β= 1/Tf = 0.00313 K-1. Take cp,water=4.178 kJ/kgK
Select one:
a. 67.2 oC
b. 104.3 oC
c. 89.6 oC
d. 82.3oC
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