Answer to Question #144741 in Physics for Sam

Question

A copper wire has an original length of 1.0m and a diameter of 1.1mm. What is the cross-sectional area of the wire?

Answer 1

The cross-sectional area of the wire is

$$A=\pi\frac{d^2}{4}\\A=\pi\frac{1.1^2}{4}=0.95\ mm^2$$