A car’s horn emits a steady tone of

PHYSICS · Subjective · A Level · Physics · Waves · Waves

Problem

600\,\text{Hz}

. Both the car and a cyclist travel due south in the same lane; the car’s speed is

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

and the cyclist’s speed is also

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

. The speed of sound in air is

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

. Calculate the frequency heard by the cyclist.