# Physics

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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?

• Physics -

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

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