A sound wave is established in the air. Which of these statements accurately describes the motion of the individual air molecules?
A)back and forth around equilibrium positions in the direction of the sound wave
B)back and forth around equilibrium positions perpendicular to the direction of the sound wave
C)continuous motion in the direction of the sound wave
D)molecules not moving; sound moving between them

Question

Quizplus · Accepted Answer

Sound waves in air are longitudinal waves, meaning the air molecules vibrate back and forth along the same direction the wave is moving, around their equilibrium positions.

A Sound Wave Is Established in the Air