Question: A horizontal copper plate 10 cm thick is initially uniform in temperature at 250C. The bottom surface of the plate is insulated. The top surface

A horizontal copper plate 10 cm thick is initially uniform in temperature at 250ºC. The bottom surface of the plate is insulated. The top surface is suddenly exposed to a fluid stream at 80ºC. After 6 min the surface temperature has dropped to 150ºC. Calculate the convection heat-transfer coefficient that causes this drop.

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