Question

Which statement best describes the motion of air particles in a sound wave?

A. They move all around the wave.
B. They move in the direction opposite to that of the wave.
C. They vibrate at right angles to the wave.
D. They vibrate parallel to the wave.

Answer 1

Answer
D
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Answer 2

The answer is D.

Step-by-step explanation:

They vibrate parallel to the wave.

During the propagation of a sound wave in air, the vibrations of the particles are most accurately represented as longitudinal. Longitudinal waves are waves in which the motion of the individual particles of the medium occurs in a direction that is parallel to the direction of energy transmission.