temperature

| January 30, 2015

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/m2 · °C

(e) 37,540 W/m2 · °C

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electric power
heat

Category: Coursework

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