Solve the each part of given problem:
Problem: A 730-W heating coil designed to operate from 110 V is made of Nichrome wire 0.760 mm in diameter.
Part A: Assuming the resistivity of the Nichrome remains constant at its 20.0°C value, find the length of wire used.
___m
Part B: Now consider the variation of resistivity with temperature. What power is delivered to the coil of part (a) when it is warmed to 1200°C?
_____W
Please show your results in detailed calculations.