A 50-cm-long, 0.2-cm-diameter electric resistance wire
Chapter 2, Problem 136P(choose chapter or problem)
Problem 136P
A 50-cm-long, 0.2-cm-diameter electric resistance wire submerged in water is used to determine the boiling heat transfer coefficient in water at 1 atm experimentally. The surface temperature of the wire is measured to be 130°C when a wattmeter indicates the electric power consumption to be 4.1 kW. Then the heat transfer coefficient is
(a) 43,500 W/m2-°C (b) 137 W/m2-°C
(c) 68,330 W/m2-°C (d) 10,038 W/nf°C
(e) 37,540 W/m2-°C
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