How long must a 0.4 cm cylindrical copper fin be if the temperature of its insulated tip exceeds the surrounding air temperature by 20% of T0 – T∞? Consider air temp to be 20°C and ℎ̅ = 28 W/m2K. Book gives answer of 27.3 cm. • You can use figure 4.9a or equation 4.45 in the book to find the right mL for the desired at the tip.
How long must a 0.4 cm cylindrical copper fin be if the temperature of its insulated tip exceeds the surrounding air temperature by 20% of T0 – T∞? Consider air temp to be 20°C and ℎ̅ = 28 W/m2K. Book gives answer of 27.3 cm. • You can use figure 4.9a or equation 4.45 in the book to find the right mL for the desired at the tip.
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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How long must a 0.4 cm cylindrical copper fin be if the temperature of its insulated tip exceeds the
surrounding air temperature by 20% of T0 – T∞? Consider air temp to be 20°C and ℎ̅ = 28 W/m2K. Book gives answer
of 27.3 cm.
• You can use figure 4.9a or equation 4.45 in the book to find the right mL for the desired at the tip.
• Recall the nondimensional temperature is = (T – T∞)/(T0 – T∞)
Transcribed Image Text:1
Otip
(4.45)
cosh mL
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