Problem $18\mathrm{.}67$

$7$ of $10$

Review I Constants

Part A

A small city requires about $15MW$ of power. Suppose that instead of using high$-$voltage lines to supply the power, the power is delivered at $120V.$

Assuming a two$-$wire line of $0\mathrm{.}64-$cm$-$diameter copper wire, estimate the cost of the energy lost to heat per hour per meter. Assume the cost of electricity is about $12$ cents per $kWh.$ The resistivity of copper is $1\mathrm{.}68{10}^{-8}*m.$

Express your answer using two significant figures.

$?$

Cost $=$

$ per hour per meter

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