A tranverse harmonic wave on a string is described by y (x, t) = 3.0 sin (36t + 0.018x + $\pi $/4) where x arid y are in cm and t in sec. The positive direction of x is from left to right.
(a) Is this a travelling wave or a stationary wave ?
If it is travelling, what are the speed and direction of its propagation ?
(b) What are its amplitude and frequency ?
(c) What is the initial phase at the origin ?
(d) What is the least distance between two successive crests in the wave ?