Circuits $-$ Attempt $1$

Problem $18\mathrm{.}55$

$6$ of $10$

Part A

A $0\mathrm{.}61-$mm$-$diameter copper wire carries a tiny current of $2\mathrm{.}8A.$ The molar mass of copper is $63\mathrm{.}5\frac{g}{m}$ole and its density is $8900k\frac{g}{m^3}.$

$N_A=6\mathrm{.}02{10}^{23}.$

Review I Constants

Estimate the electron drift velocity. Assume one free electron per atom.

Express your answer to two significant figures and include the appropriate units.

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