When 115 V is applied across a wire that is 10 m long, the magnitude of the current density is 1.4*10^4 A/m2. Find the resistivity of the wire.
R=V/I; R=pL/A => V/I=pL/A => A(x)V/I(x)L=p
:(π(5^2))(115)/(1.4*10^4)(10)
Is this right? Do I just plug and chug now?