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,

b. a lightning bug, plug of grass, and a worm

the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.