Asatellite is orbiting earth with a distance r = 2rearth from earth's center. if the satellite is moved to a distance r = 4rearth (twice as far away), its potential energy would be what is was before.

Half

Explanation:

Given that:

Now, if the satellite is moved to a distance

We  have the mathematical expression for the potential energy fue to gravitational field as:

...................(1)

where:

M = mass of earth

m = mass of satellite

R = radial distance of satellite

Now from eq. (1) initially we have:

after the satellite is moved, we have:

which is half of the initial condition.

probably not the "magnets"in the magnet, so to speak, are thought to be electrons orbiting in shells. vurrent loops two sides to the loop