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Volgvan
3 years ago
13

PLZZZ HELP!!!

Physics
2 answers:
sdas [7]3 years ago
7 0

Answer:

The crests of the sound wave are spaced closer together.

Explanation:

the wavelength between successive crests is decreased due to the motion of the truck in the same direction as the sound

tatyana61 [14]3 years ago
3 0

Answer and Explanation: The Doppler effect is a change in the frequency of sound waves that occurs when the source of the sound waves is moving relative to a stationary listener. As the source of sound waves approaches a listener, the sound waves get closer together, increasing their frequency and the pitch of the sound.

Hopefully that helped!

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