A mosquito is making a sound with its wings at an average rate of 500 vibrations in 10 seconds. The frequency of vibration is
Frequency is the number of oscillations/vibrations completed in 1 second.
The mosquito produces 500 vibrations in 10 seconds.
Thus, vibrations completed in 1 second
=50010=50 per second
Thus, the frequency of vibration is 50 Hz.