When a sound wave travels through air, the air particles _______.
A. vibrate along the direction of the wave motion
B. vibrate but not in any fixed direction
C. vibrate perpendicular to the direction of the wave motion
D. do not vibrate
Answer:A
When a sound wave travels through air, the air particles _______.
A. vibrate along the direction of the wave motion B. vibrate but not in any fixed direction C. vibrate perpendicular to the direction of the wave motion D. do not vibrate