Question: When a sound source is moving away from an observer, the observer will hear a lower pitch. This is due to (2 points) a decrease

When a sound source is moving away from an observer, the observer will hear a lower pitch. This is due to (2 points) a decrease in the amplitude of the sound wave an increase in the frequency of the sound wave a decrease in the frequency of the sound wave an increase in the amplitude of the sound wave

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