Physics, 14.02.2020 00:59, wanderer3653

Why does a siren have a lower pitch as it moves away from you? A The period of the sound wave is decreased B The amplitude of the sound wave is increased C The crests of the sound wave are farther apart D The troughs of the sound wave are spaced closer together.

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Why does a siren have a lower pitch as it moves away from you? A The period of the sound wave is dec...