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A transverse hormonic wave on a string o...

A transverse hormonic wave on a string on a string is descibed by
`y(x,t)=3.0sin(36t+0.018x+(pi)/(4))`
Where x and y are in cm and t is in sec. The positve direction of x is from left to rigth .

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The correct Answer is:
(a) A travelling wave. It traves from light to left with a speed of `20 ms^(-1)`,
(b) `3.0 cm , 5.7 Hz`
(c) `pi//4`
(d) `3.5 m`
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