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27 April, 10:26

Which speed (s) is/are below the sound barrier in air? A. 257 m/s B. 1,030 m/s C. 10 m/s

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  1. 27 April, 10:52
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    Frequent*wavelength=speed

    wavelength=speed/frequent

    1030 is above the speed of sound of the air
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