Two mechanical waves travel in different media

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

Two mechanical waves travel in different media. Wave P has frequency

500\,\text{Hz}

and wavelength

0.60\,\text{m}

. Wave Q has a time period of

1.0\,\text{ms}

and wavelength

0.40\,\text{m}

. Which statement about their speeds is correct? (a) Wave P is faster with speed

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

(b) Wave Q is faster with speed

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

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

(d) Wave P is faster with speed

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