A2.1-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 temperature of the wire is measured to be 180°C in steady operation. Also, the voltage drop and electric current through the wire are measured to be 110 V and 3 A, respectively. Disregarding any heat transfer by radiation, determine the convection heat transfer coefficient for heat transfer between the outer surface of the wire and the air in the room.
A2.1-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 temperature of the wire is measured to be 180°C in steady operation. Also, the voltage drop and electric current through the wire are measured to be 110 V and 3 A, respectively. Disregarding any heat transfer by radiation, determine the convection heat transfer coefficient for heat transfer between the outer surface of the wire and the air in the room.
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![A2.1-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 temperature of the wire is measured
to be 180°C in steady operation. Also, the voltage drop and electric current through the wire are measured
to be 110 V and 3 A, respectively. Disregarding any heat transfer by radiation, determine the convection heat
transfer coefficient for heat transfer between the outer surface of the wire and the air in the room.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffc44715e-e997-4081-aac6-58f75fd336c7%2F329b715f-fa2c-4c55-aecb-505ca165c1dd%2Fpgbynw_processed.png&w=3840&q=75)
Transcribed Image Text:A2.1-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 temperature of the wire is measured
to be 180°C in steady operation. Also, the voltage drop and electric current through the wire are measured
to be 110 V and 3 A, respectively. Disregarding any heat transfer by radiation, determine the convection heat
transfer coefficient for heat transfer between the outer surface of the wire and the air in the room.
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