Question

question 20 of 25
which of the following describes sound waves?
a. waves that require a medium and in which the vibrations are perpendicular to the motion of the sound
b. waves that do not require a medium and in which the vibrations are perpendicular to the motion of the sound
c. waves that do not require a medium and in which the vibrations are parallel to the motion of the sound
d. waves that require a medium and in which the vibrations are parallel to the motion of the sound

Explanation:

Sound waves are mechanical waves, which means they require a medium (such as air, water, or solids) to travel through. In sound waves, the particles of the medium vibrate parallel to the direction of the wave's motion.

Answer:

D. Waves that require a medium and in which the vibrations are parallel to the motion of the sound