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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 | |