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?
(a) The time period = 1/f = 1/500 = 0.002 secs.
(b) The frequency of the vibrations in hertz is 500 Hz. Because 1Hz = 1 vibration/second.
(c) We can hear this because it is in the range of 20Hz to 20,000Hz.