Gold is sometimes used to make very small connecting wires in electronic circuits. A particular gold wire has length $$\(2.50 \times 10^{-3} \mathrm{~m}\)$$ and cross-sectional area $$\(6.25 \times 10^{-8} \mathrm{~m}^{2}\)$$. Gold has resistivity $$\(2.3 \times 10^{-8} \Omega \mathrm{~m}\)$$.

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