a source of soun moving towards the stationary observer in 20m/s. the frequency of the source of sound is 380hz.the speed of sound waves in air is 400m/s. what is the frequency of the sound wave heard by the observe?
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hey!
Explanation:
When the receiver moves at the speed of sound toward the source, twice as many waves are intercepted as by a stationary observer, and the frequency is doubled.If the observer moves toward the stationary source, the observed frequency is higher than the source frequency. If the observer is moving away from the stationary source, the observed frequency is lower than the source frequency.
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