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The equation of a travelling plane sound wave has the form ε = 60 cos (1800t – 5.3x), where ε is expressed in micrometers, t in seconds, and x in meters. Find: (a) The ratio of the displacement amplitude, with which the particles of medium oscillate, to the wavelength;
(b) The velocity oscillation amplitude of particles of the medium and its ratio to the wave propagation velocity;
(c) The oscillation amplitude of relative deformation of the medium and its relation to the velocity oscillation amplitude of particles of the medium. |
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