The snapshot of a transverse wave on a stretched string at t=0 shows a crest at x=8cm, the next trough at x=14cm and the following crest at x=20cm. The displacement profile is perfectly sinusoidal and successive crests have equal height.
The string vibrates at a frequency of 50Hz.
(a) Determine the wavelength of the wave.
(b) Calculate the speed of wave propagation along the string.
(c) Find the phase difference between two points that are 3.0cm apart along the string.