A tungsten wire has a radius of 0.090 mm and is heated from 20.0 to 1414 C. The temperature coefficient of resistivity is a = 4.5 x 10 3 (C9)-1. When 100 V is applied across the ends of the hot wire, a current of 2.5 A is produced. How long is the wire? Neglect any effects due to thermal expansion of the wire