A travelling harmonic wave on a string is described by \( y=7.5 \sin (0.005 x+12 t) \) in meter.....

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A travelling harmonic wave on a string is described
\( \mathrm{P} \)
by \( y=7.5 \sin (0.005 x+12 t) \) in meter. Its time period
W
in second is
(1) \( \frac{\pi}{12} \)
(2) \( \frac{\pi}{6} \)
(3) \( \frac{\pi}{3} \)
(4) \( \frac{\pi}{2} \)


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