2 particles on a wave would
be considered out of phase
if they were
wavelengths apart.

8 meters above the spring

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.

higher potential

explanation:

because it is in a high speed so it must move into a of high potential