Question

an object vibrates 900 times in 0.05 sec.
what will be the sound wave ultrasonic, audible and infrasonic​

Answer 1

Answer:

Infrasonic sound wave and 3Hz frequency

frequency=3

Explanation:

frequency=no.of vibrations per second

no.of vibrations=900 times

1min-60sec

5 min-5×60=300 sec

frequency=900/300

=3

It is infrasonic sound wave, as it is lower than 20Hz

Answer 2

Answer:

20Hz

Explanation:

f= t/1

=

0.05/1 = 100/5=20Hz

It will be audible