Question

Sound waves of wavelength 1m have velocity 340m/s in air. What is their frequency? Can we hear that sound?​

Answer 1

Answer:

The relationship between the velocity of the sound, its wavelength and frequency is given by the formula v=λ×f,

where, v - velocity of the wave

λ- wavelength of the wave

f - frequency of the wave.

In the question, it is given that the velocity of the wave is 340 m/s and the wavelength is 0.85 m.

Now the frequency is calculated as follows.

v=λ×f,

That is, f= v/λ

f = 0.85/340 =400Hz.

Hence, the frequency of the wave is 400 Hz.