Question

unlike a transverse wave, a longitudinal wave travels in a direction that is parallel to the direction the particles in the medium move. when eli moves his hand back and forth, the coils in the spring toy squeeze together and pull apart horizontally. a wave of compressing and stretching then travels along the horizontal length of the spring toy. complete the sentences. the longitudinal wave that eli creates in the spring toy travels and the particles in the spring move. this means tha from left to right articles of matter move in directions. up and down

Explanation:

A longitudinal wave travels in the same direction as the particle motion. In the given scenario, the wave travels horizontally (from left to right as per the context of the spring toy's length). The particles in the spring move horizontally (back - and - forth as Eli moves his hand). Since the wave direction and particle motion direction are the same, they are parallel.

Answer:

The longitudinal wave that Eli creates in the spring toy travels from left to right and the particles in the spring move from left to right. This means that particles of matter move in parallel directions.