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QUESTION
How long must a copper fin, 0.4 cm in diameter, be if the temperature of its insulated tip exceeds the surrounding air temperature by 20% of (To -
How long must a copper fin, 0.4 cm in diameter, be if the temperature of its insulated tip exceeds the surrounding air temperature by 20% of (To - Tinf)? Tair = 20C and h = 28 W/m^2k (including both convection and radiation)
