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b) An aluminum plate of thickness L = 3 cm and at a uniform temperature of To = 225C is suddenly immersed at time t

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b) An aluminum plate of thickness L = 3 cm and at a uniform temperature of To = 225C is suddenly immersed at time t = 0 in a well-stirred fluid maintained at a constant temperature T. = 25C. The heat transfer coefficient between the plate and the fluid is h = 320 W/m2.C. Determine the time required for the center of the plate to reach 50C. (7 marks)

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