20. The flat sound wave has a period T = 3ms, the ampli

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20. The flat sound wave has a period T = 3ms, the amplitude of A = 0,2 mm and a wavelength λ = 1,2 m. For the points of the medium remote from the source of vibrations at a distance x = 2 m, to find: 1) the displacement ξ (x, t) at time t = 7 ms; 2) the speed and acceleration of ξ * ξ ** for the same point in time. The initial phase of the oscillations take zero.

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Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)


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