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# The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute?

We know that, $$Frequency \ = \ \frac{Number \ of \ oscillations}{Total \ time}$$

Also, $$Number \ of \ oscillations \ = \ Frequency \ × \ Total \ time$$

Given,

Frequency of sound = 100 Hz

Total time = 1 min = 60 s

$$\therefore Number \ of \ oscillations \$$
$$= \ 100 \ × \ 60 \ = \ 6000$$

The source vibrates 6000 times in a minute and produces a frequency of 100 Hz.