Two identical guitars are played by two persons to give notes of the same loudness and pitch. Will they differ in quality? Give a reason for your answer.

State one difference between a musical note and noise.

Draw a diagram to show the wave pattern of high pitch note and a low pitch note, but of the same loudness.

The diagram below shows three different modes of vibration P, Q and R of the same string of a given length.

(a) Which vibration will produce a louder sound and why?

(b) Which vibration will produce sound of maximum shrillness (or pitch) and why?

(c) What is the ratio of the wavelength of vibrations P and R?