Physics

Problem

A factory siren emits a steady sound of frequency

400\,\text{Hz}

. Given that the speed of sound is

340\,\text{m/s}

in air,

1\,500\,\text{m/s}

in water and

5\,100\,\text{m/s}

in iron, which pair of values represents the wavelengths of this sound in water and in iron, respectively? a)

0.85\,\text{m},\;12.75\,\text{m}

12.75\,\text{m},\;3.75\,\text{m}

3.75\,\text{m},\;12.75\,\text{m}

0.27\,\text{m},\;0.08\,\text{m}