The ramp the movers use to them move a refrigerator into the moving van modifies the force necessary to perform work and therefore is a(n)

Machine.

Explanation:

The ramp the movers use to help them move a refrigerator into the moving van modifies the force necessary to perform work and therefore is a machine. As it's in the definition of a machine that the the thing made by the people to make their work easier.

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

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.