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It is the science of sound waves.

a.Acoustic
b.Waves
c.drumstick
d.echo​

Sagot :

Answer:

Sound waves are compression waves. They're also called longitudinal waves because the air vibrates along the same direction as the wave travels. ... Animation of a transverse wave (how light and water waves travel). Animation of a longitudinal wave (how sound waves travel).

Explanation:

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View image Applefernandez108
View image Applefernandez108

Answer: D

echo is the answer

Explanation:  Sound waves is all about vibration.The source of a sound vibrates, bumping into nearby air molecules which in turn bump into their neighbours, and so forth. This results in a wave of vibrations travelling through the air to the eardrum, which in turn also vibrates.

Echoes. An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. Although the direction of the sound changes, the echo sounds the same as the original sound.

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