A 2 kW resistance heater wire whose thermal conductivity is k = 15 W/mK has a diameter of D = 4 mm and a length of L = 0.5 m, and is used to boil water. If the outer surface temperature of the resistance wire is TS = 105°C, determine the temperature at the center of the wire.

A 2 kW resistance heater wire whose thermal conductivity is k = 15 W/m

1.	A 2 kW resistance heater wire whose thermal conductivity is k = 15 W/mK has a diameter of D = 4 mm and a length of L = 0.5 m, and is used to boil water. If the outer surface temperature of the resistance wire is TS = 105°C, determine the temperature at the center of the wire.
A.	126°C
B.	110°C
C.	118°C
D.	130°C
Answer» B. 110°C

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A 2 kW resistance heater wire whose thermal conductivity is k = 15 W/mK has a diameter of D = 4 mm and a length of L = 0.5 m, and is used to boil water. If the outer surface temperature of the resistance wire is TS = 105°C, determine the temperature at the center of the wire.

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