Physics

Problem

A sound wave in air is represented by

y=0.02\sin(8\pi x-200\pi t+\tfrac{\pi}{6})

(SI units). During the time interval between two consecutive instants when the particle at

x=0.20\,\text{m}

crosses the equilibrium position, how far does the wave advance? a)

0.250\,\text{m}

0.0625\,\text{m}

0.125\,\text{m}

0.500\,\text{m}