A large slab of aluminum has a thickness of 10 cm and is initially uniform in temperature

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A large slab of aluminum has a thickness of 10 cm and is initially uniform in temperature at 400ºC. Suddenly it is exposed to a convection environment at 90ºC with h = 1400 W/m2 · ºC. How long does it take the centerline temperature to drop to 180ºC?
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Heat Transfer

ISBN: 978-0073529363

10th edition

Authors: Jack Holman

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