posted by Anonymous .
Aluminum has a resistivity of 2.7*10-8 Ùm. What would be the resistance of 100 m of aluminum wire with a cross-sectional area of 2*10-4 m2?
2.7*10^-8 is the resistivity of Al, in ohm-meters. Call it rho.
The resistance is R = (rho)*length/area
Do the calculation