Q3 ) A 2-kW resistance heater wire with thermal conductivity of k 20 W/m °C, a diameter of D = 5 mm, and a length of L = 0.7 m is used to boil water. If the outer surface temperature of the resistance wire is Ts = 110°C, determine the temperature at the center of the wire. Ans: 121.4 °C 110°C -Resistance heater

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