What causes an electric current in a wire?

a) electrons move because of heat
b) electrons build up in the wire and create a charge
c) electric fields cause atoms to move in the wire
d) electrons flow because of electrical attraction and repulsion

you : 3

When a scientific theory has been tested and proved by the scientific community, it becomes a law

Amixture with the same composition throughout is!

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.