Question

a pendulum oscillates 40 times in 4 seconds . calculate its time period and frequency .can we hear the sound produces by the oscillation of this pendulum give reason to our answer

Answer 1

A pendulum oscillates 40 times in 4 seconds.

Frequency = 40/4 = 10 Hz

Time period = 1/10 = 0.1 second

No, we cannot hear the sound produced by the pendulum because human ears can hear sound of frequency range 20 Hz to 20000 Hz, but the sound produced by the pendulum is 10 Hz which is much below the minimum audible range.

Answer 2

Answer:

time period =0.1

frequency =10 Hz

then,

we cannot hear that sounds because our ear are able to hear only 20Hz to 20,000hertz , even then it cannot be heard by use .It means that the lower limit of frequency of human hearing is 20hertz and upper limit of frequency of human hearing is 20,000hertz .

Explanation:

I hope you like the answer.