That gave me 2.98m and 11.95m. Both were still wrong. Hmmm. It's possible my teacher made a miscalculation, she does that fairly frequently. Thank you though!
Homework Statement
A 530 W heating coil designed to operate from 110 V is made of Nichrome wire 0.500 mm in diameter.
(a) Assuming that the resistivity of the Nichrome remains constant at its 20.0°C value, find the length of wire used.
(b) If the diameter of the wire were doubled...