Question: A 5-cm-external-diameter, 10-m-long hot-water pipe at 80C is losing heat to the surrounding air at 5C by natural convection with a heat transfer coefficient of

A 5-cm-external-diameter, 10-m-long hot-water pipe at 80°C is losing heat to the surrounding air at 5°C by natural convection with a heat transfer coefficient of 25 W/m2 • °C. Determine the rate of heat loss from the pipe by natural convection, in kW.

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