An aluminum sphere having a diameter of 5.6 cm is initially at a uniform temperature of 355C

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An aluminum sphere having a diameter of 5.6 cm is initially at a uniform temperature of 355ºC and is suddenly exposed to a convection environment at T = 23ºC with a convection heat transfer coefficient of 78W/m2·ºC. Calculate the time for the center of the sphere to cool to a temperature of 73ºC. Express the answer in seconds.
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Heat Transfer

ISBN: 978-0073529363

10th edition

Authors: Jack Holman

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