When a substance freezes, its atoms become locked in place so they do not move from one position to another. Therefore, any substance that is frozen is a plasma.
gas.
liquid.
solid.

How would you place two electrons on a sphere of radius r so that the electrostatic potential energy is minimized. how would you place three electrons to solve the same problem.

Protons and neutrons are found within the nucleus of an atom

Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.