Question

in a longitudinal wave, what happens to the particles during a rarefaction? the particles rest. the particles spread apart. the particles compress. nothing happens to the particles.

Explanation:

In a longitudinal wave, a rarefaction is a region where the particles are spread apart. This is in contrast to a compression where particles are close together. Particles do not rest or have nothing happen to them during a rarefaction.

Answer:

The particles spread apart.