1.

The plane wave is described by the equationy=3cos⁡(x/4-10t-π/2),Where c is in meters and t in seconds. The maximum velocity of the particles of the medium due to this is?

A. 30m/s
B. 3π/2 m/s
C. 3/4 m/s
D. 40m/s
Answer» B. 3π/2 m/s


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