Physics

Problem

A sound wave has a time period of

2.5\,\text{ms}

and a wavelength of

85\,\text{cm}

. Find its speed. a)

34\,\text{m s}^{-1}

3.4\times10^{3}\,\text{m s}^{-1}

340\,\text{m s}^{-1}

680\,\text{m s}^{-1}