A sound wave of frequency 440Hz and amplitude 1.5mm travels through air with a speed of 330ms−1. Consider a particular layer of air located 0.50m from the source at t=0.
(i) Calculate the maximum displacement of the air molecules in this layer from their equilibrium position.
(ii) Determine the distance that the sound disturbance covers in 0.02s.
(iii) How many complete oscillations does the chosen layer of air execute in the time interval given in part (ii)?
(iv) Find the net displacement of the air molecules in the layer after these oscillations are completed.
(v) Explain briefly why your answers to parts (ii) and (iv) are fundamentally different.