1. The problem statement, all variables and given/known data Calculate the resistance per meter at room temperature of a constant wire if diameter [tex]1.25mm[/tex]. The resistivity of constant a at room temperature is [tex]5x10^-7\Omega{m}[/tex] 2. Relevant equations I'm not sure, but I think this is the right formula: [tex]R = \frac{Pl}{A}[/tex] 3. The attempt at a solution [tex]Area = \pi \times \left(\frac{1.25 \times 10^{-3}}{2}\right)^2[/tex] [tex]A = 1.2 \times 10^{-6} m^2[/tex] What is Pl?