$5.$ A wire $50$ m long and $2$ mm in diameter is connected to a source with a potential difference of $9\mathrm{.}11$ V $,$ and the current is found to be $36$ A $.$ Assume a temperature of $\backslash (20^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash )$ and, using Table $26\mathrm{.}2,$ identify the metal out of which the wire is made.