You have a lump of copper with a mass of 1.8 grams. Copper is ductile so you can draw it into a cylindrical wire. You draw it into a wire with length L and diameter D so that it has a resistance of 2LaTeX: \OmegaΩ What is the length of the wire in m?

Required information:

Density of copper =

Resistivity of copper =

The length of the wire is 4.9 m.

Explanation:

Volume of copper = Mass of the copper/Density of copper

Since it is a cylinder of cross-sectional area, A, and length, l

Resistance is given by

where l is the length, A is the cross-sectional area and ρ resistivity of copper.

Equating both equations of A,

i think the answer is b

the independent variable, or the one that is intentionally manipulated is the speed.