Question

the type of wave that eli creates in the spring toy is called a longitudinal wave.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.what is true about the longitudinal wave that eli creates in the spring toy? select the true sentences.the wave travels from left to right.the particles of matter in the spring toy move up and down.the waves and the particles of matter move in parallel directions.the waves and the particles of matter move in perpendicular directions.

Explanation:

1. The text states the wave travels horizontally along the spring, and the hand is on the left, so the wave moves left to right.
2. Longitudinal waves have particles moving parallel to the wave's direction (horizontal, back-and-forth here), not up and down (that is transverse).
3. The core definition of a longitudinal wave is that the wave direction and particle motion are parallel.
4. Perpendicular motion between wave and particles describes transverse, not longitudinal, waves.

Answer:

• The wave travels from left to right.
• The waves and the particles of matter move in parallel directions.