Frequency measures the number of cycles or vibrations per second in a sound wave.

Given a source with a frequency of 100 Hz, it completes 100 vibrations in one second.

To find the number of vibrations in a minute:

100 vibrations/second x 60 seconds = 6000 vibrations/minute

Hence, a sound source operating at 100 Hz will produce 6000 vibrations in one minute.