An electrical water (k = 0.61 W/m· K) heater usesnatural convection to transfer heat from a 1-cm-diameter by0.65-m-long, 110 V electrical resistance heater to the water.During operation, the surface temperature of this heater is 120°Cwhile the temperature of the water is 35°C, and the Nusselt number(based on the diameter) is 5. Considering only the side surface ofthe heater (and thus A = πDL), the currentpassing through the electrical heating element is _____. (Solveusing EES.)
2.2 A
5.6 A
4.8 A
3.6 A
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