A steel rod 12.5 mm in diameter and 20 cm long has one end attached to a

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A steel rod 12.5 mm in diameter and 20 cm long has one end attached to a heat reservoir at 250ºC. The bar is initially maintained at this temperature throughout. It is then subjected to an airstream at 30ºC such that the convection heat-transfer coefficient is 35W/m2 · ºC. Estimate the time required for the temperature midway along the length of the rod to attain a value of 190ºC.
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Heat Transfer

ISBN: 978-0073529363

10th edition

Authors: Jack Holman

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