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the equation of a progressive wave is gi...

the equation of a progressive wave is given by
y=5 sin (100πt−0.4πx) where y and x are in m and t is in s.
Which of the following statement are correct?
(1) The amplitude of the wave is 5 m.
(2) The wavelength of the wave is 5 m.
(3) The frequency of the wave is 50 Hz.
(4) The velocity of the wave is 250 m/s

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