A large plate of aluminium k 215w/m-k; 8.4 10 m /s 5 2 5.0cm thick and initially at 200 c o is suddenly exposed to a convection surface environment of 70 c o with h 525w/m -k 2 . Calculate the temperature at a depth of 1.25cm from one of the faces one minute after the plate has been exposed to the environment. How much energy per unit area has been removed per unit area of the plate during this time.
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Answer:
T= 147.7°C and Q/L = 6.48 x105 J/m
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