The wire in the video is 2.0 m long. It’s a 21-gauge wire, meaning that its diameter is 0.723 mm. What is the resistivity of copper, according to your measurements?

The resistance of the copper wire is 0.082 ohm

Explanation:

Given;

length of the wire, L = 2.0 m

diameter of the wire, d = 0.723 mm

radius of the wire, r = d / 2 = 0.3615 mm

resistivity of copper, ρ = 1.68 x 10⁻⁸ ohm m

The area of the copper wire is given by;

A = πr²

A = π (0.3615 x 10⁻³)²

A = 4.106 x 10⁻⁷ m²

The resistance of the copper wire is given by;

Therefore, the resistance of the copper wire is 0.082 ohm

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d