Question

The sound from an insect is produced when it vibrates its wings at an average rate of 500 vibrations per second :

(a) What is the time-period of the vibrations?

(b) What is the frequency of the vibrations in hertz?

(c) Can we hear this sound? Why or why not?

Answer 1

(a) We know that,

Time period = $T=\frac{1}{f}$

$\Rightarrow T=\frac{1}{f}=\frac{1}{500}=0.002s$

(b) The sound from an insect is produced when it vibrates its wings at an average rate of 500 vibrations per second

So frequency = 500 Hertz

c) Yes; Because its frequency is within the hearing range of humans