EASY
9th CBSE
IMPORTANT
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How is pitch of sound related to its frequency?

Important Questions on Sound

EASY
9th CBSE
IMPORTANT
Which part of drum vibrates to produce sound?
EASY
9th CBSE
IMPORTANT
How does the velocity of sound change when medium changes from air to water?
EASY
9th CBSE
IMPORTANT
How is ultrasound used in cleaning?
EASY
9th CBSE
IMPORTANT
Name two animals which produce ultrasound.
EASY
9th CBSE
IMPORTANT
An echo is returned in 6 seconds. What is the distance of reflecting surface from source? [given that speed of sound is 342 m s-1]
EASY
9th CBSE
IMPORTANT
Aditi clapped her hands near a cliff and heard the echo after 4 seconds. What is the distance of the cliff from her if the speed of sound is taken as 346 m s-1.
EASY
9th CBSE
IMPORTANT
Mention two uses of multiple reflections of sound.
EASY
9th CBSE
IMPORTANT
Find the distance between a surface and the source of sound, if speed of sound is 334 m s-1 and echo returns from the surface in 1.5 s.