Q7 of 33 Page 174

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

It is being given that,

No. of vibrations in 1 second = 100


No. of vibrations in 60 seconds = 100 × 60


= 6000


Therefore, the source of sound vibrates 6000 times in a minute.


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