The heating element of a simple heater consists of a \(2.0-\mathrm{m}-\) long, 0.60 -mm-diameter nichrome wire. When plugged into a \(120 \mathrm{~V}\) outlet, the heater draws \(8.0 \mathrm{~A}\) of current when hot.

a. What is the wire's resistance when it is hot?

b. Use your answer to part a to calculate the resistivity of nichrome in this situation. Why is it not the same as the value of \(ho\) given for nichrome in Table 22.1?