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A long cylindrical electric heater wire of a 4-mm-diameter is exposed to air at a temperature of 10C. The surface temperature of the wire is

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A long cylindrical electric heater wire of a 4-mm-diameter is exposed to air at a temperature of 10C. The surface temperature of the wire is measured to be 120C. If the heat transfer coefficient between the wire and air is h=25W/m2 C, determine the rate of heat generation per unit volume of the wire, in W/cm3

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