Under water, a whistle produces sound waves of wavelength while the speed of sound in…

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

Problem

Under water, a whistle produces sound waves of wavelength

0.60\,\text{m}

while the speed of sound in water is

1500\,\text{m s}^{-1}

. The same whistle is blown in air, where sound travels at

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

. The wavelength of the whistle’s sound in air is closest to (a)

1.36\,\text{cm}

(b)

13.6\,\text{cm}

(c)

6.8\,\text{cm}

(d)

60\,\text{cm}