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The displacement of the medium in a sound wave is given by the equation y...

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The displacement of the medium in a sound wave is given by the equation y Acos ax bt where A a b are positive constants The wave is reflected by an obstacle situated at x 0 The intensity of the reflected wave is 0 64 times that of the incident wave A the wavelength of the incident wave is 27 a and its frequency is b 2 B the equation for the reflected wave is n 0 8 A cos ax bt C in the resultant wave formed after reflection the maximum particle speeds in the medium is 1 8bA D in the resultant wave formed after reflection the minimum particle speeds in the medium is zero Answer A CD

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