Why is the law of gravity an example of a universal law?
gravity exists for masses in a closed system only
o gravity exists only on the earth and moon.
gravity exists between small masses in an open system only.
gravity exists between any two masses in the universe.
answer asap for

Movement that is like a t a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. transfers energy from one location to another a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave