Задача id11971

Find the frequency of sound recorded by the receiver at a sound source frequency of 450 Hz and a sound speed in air of 340 m/s for the following cases: 1. The sound source moves in air at a speed of 34 m/s towards a stationary receiver. 2. A sound receiver moves in the air at a speed of 34 m/s towards a stationary sound source. 3. The sound source and receiver are moving towards each other, the speed of each of them relative to the air is 17 m/s.

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