Question

in which part of the wave are the particles of the medium closer together?
○ rarefactions
○ compressions
○ solids
○ liquids

Explanation:

To solve this, we recall the definitions of parts of a longitudinal wave. In a longitudinal wave, compressions are regions where particles of the medium are pushed together (closer), while rarefactions are regions where particles are spread apart. "Solids" and "liquids" are types of mediums, not parts of a wave. So the correct option is compressions.

Answer:

B. compressions (assuming the options are labeled as A. rarefactions, B. compressions, C. solids, D. liquids)