Question

what do we call the part of the wave labeled with the letter d in the image below? wave speed frequency rarefaction compression

Explanation:

In a longitudinal wave (like the one shown, likely a slinky wave), rarefaction is the region where the particles are spread apart. Compression is where particles are close together. Wave speed is how fast the wave travels. Frequency is the number of waves per second. The labeled part D shows particles spread apart, which is rarefaction.

Answer:

Rarefaction