A transverse harmonic wave on a string is described by
where x and y are in cm and t is in sec. The positive direction of x is from left to right.
(a) The wave is travelling from right to left.
(b) The speed of the wave is 20 m/s.
(c) The frequency of the wave is 5.7 Hz.
(d) The least distance between two successive crests in the wave is 2.5 cm.
Choose the correct alternatives:
1. (a, b, d)
2. (a, b, c)
3. (b, c, d)
4. (a, c, d)