Question: A wire having a diameter of 0.025 mm is placed in a horizontal position in room air at 1 atm and 300 K. A voltage

A wire having a diameter of 0.025 mm is placed in a horizontal position in room air at 1 atm and 300 K. A voltage is impressed on the wire, producing a surface temperature of 865 K. The surface emissivity of the wire is 0.9. Calculate the heat loss from the wire per unit length by both free convection and radiation.

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