80 POINTSS What causes current to flow?

The ions in the battery travel through the wire to get to the opposite electrode

Protons jump between atoms because they have too much energy

Electrons will move whenever they are in a conductor

A battery creates an electric field, which pushes nearby electrons, which then repel other electrons to push them down the loop

Electrons will move whenever they are in a conductor

Explanation:

An electric current flows when electrons move through a conductor, such as a metal wire. The moving electrons can collide with the ions in the metal.

answer; how far out of place which the object finished relative to the starting location;

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.