Q2:- A sphere made of pure copper, which is 13 mm in diameter, is 70 °C (at t=0) when it inserted into a gas having a temperature of 25 °C. After 65 s the temperature of the sphere reach 60 °C. Make the appropriate assumption to find the heat transfer coefficient of the gas. What is the temperature of the sphere after 80 s. (A;=TT D², V= D³/6, Lc=V/ A)

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Q2:-
A sphere made of pure copper, which is 13 mm in diameter, is 70 °C (at
t=0) when it inserted into a gas having a temperature of 25 °C. After 65
s the temperature of the sphere reach 60 °C. Make the appropriate
assumption to find the heat transfer coefficient of the gas. What is the
temperature of the sphere after 80 s.
(A;=TT D2, V= TT D³/6, Lc=V/ A,)
Transcribed Image Text:Q2:- A sphere made of pure copper, which is 13 mm in diameter, is 70 °C (at t=0) when it inserted into a gas having a temperature of 25 °C. After 65 s the temperature of the sphere reach 60 °C. Make the appropriate assumption to find the heat transfer coefficient of the gas. What is the temperature of the sphere after 80 s. (A;=TT D2, V= TT D³/6, Lc=V/ A,)
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