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A plane wave is described by the equatio...

A plane wave is described by the equation `y = 3 cos (x/7 - 10 t - pi/6)`.
The maximum velocity of the particles of the medium due to this wave is

A

cross the mean position with different velocities at the same instant

B

cross the mean position with different velocities at different instants

C

cross the mean position with same speed

D

cross the mean position with same velocity

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The correct Answer is:
C
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