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14-03-2018
Physics

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Which of these would be best explained by the Doppler effect? A) The change in frequency as you shorten a guitar string. B) The change in pitch heard as an ambulance approaches you. C) The change in volume as a train pulls away from the station. D) The change in speed of a sound wave as it travels from air into water

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25-02-2020

B)

Doppler effect is about the apparent change in frequency. The change in pitch heard as an ambulance approaches you is an example of this

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