Physics

Problem

a. A car is moving at

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

in still air where the speed of sound is

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

. Calculate the Mach number of the car. b. Would the numerical value obtained in part (i) change if the speeds were expressed in

\text{km}\,\text{h}^{-1}

instead of

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

? Justify briefly.