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3 years ago

7

Please help!!

1 answer:

nikdorinn [45]3 years ago

4 0

Answer:

The waves travel at the same speed, but the observed frequency depends on any relative motion between the observer and source. When the observed frequency changes, so does the wavelength. If the observer and source are moving toward each other, then the frequency increases and the wavelength decreases

Explanation:

Hope it helps.

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