A dog can hear sounds in the range from 15 to 50,000 Hz. What wavelength corresponds to the lower cut-off point of the sounds at 20◦C where the sound speed is 344 m/s?

λ = 22.667 m

Explanation:

The range of frequency (f) of sound wave = 15 Hz to 50 KHz

Temperature (T) = 20 °C

Speed (v) of sound = 344 m/s

Lets assume, wavelength corresponding to the lower cut-off point of the sounds= λ

We know that, the speed (v), frequency (f) and wavelength (λ) are related as

So,

λ = 22.667 m

12000j is work done