EASY
7th CBSE
IMPORTANT
Earn 100

What is the frequency of infrasonic sound?

Important Questions on Sound

MEDIUM
7th CBSE
IMPORTANT
Why the oscillations of a simple pendulum are not perceived by the human ear?
EASY
7th CBSE
IMPORTANT
What is the persistence of hearing?
EASY
7th CBSE
IMPORTANT
What is the minimum distance between the reflector and the listener to hear the echo, when the speed of sound in air is 330 m s-1?
EASY
7th CBSE
IMPORTANT
What is the principle on which megaphone works?