1-102 A 1.4-m-long, 0.2-cm-diameter electrical wire extends across a room that is maintained at 20°C. Heat is generated in the wire as a result of resistance heating, and the surface tem- perature of the wire is measured to be 240°C in steady op- eration. Also, the voltage drop and electric current through the wire are measured to be 110 V and 3 A, respectively. Dis- regarding any heat transfer by radiation, determine the con- vection heat transfer coefficient for heat transfer between the outer surface of the wire and the air in the room. Answer: 170.5 W/m². °C Room

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