Question

A source is producing 1500 sound waves in 3 seconds if the wavelength of sound waves is 68 cm, then the velocity of the sound waves will be

Answer 1

We have number of vibrations in 3 seconds=1500
It's frequancy=number of vibrations/time
=1500/3
=500Hz
It's wavelength=68cm=0.68m
we have,
wavelength*frequancy=velocity
0.68m*500Hz=340m/sec.
we get velocity of the sound wave is 340 m/sec