There are four accepted fundamental forces or interactions undefined by scientists: gravitational, electromagnetic, strong nuclear,
and weak nuclear. Which choice is an example of the electromagnetic force?
Protons of similar charges are bound together and stabilized within an
atom's nucleus
It is responsible for nuclear beta decay and other similar decay processes
involving fundamental particles
This is the attractive force between matter; between two things that have
mass
Electrons bind with nucleus of an atom, due to the presence of protons

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.