EASY
9th CBSE
IMPORTANT
Earn 100

On a hot summer day, speed of sound was recorded at Chennai and Delhi as vc and vd. Then

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Important Questions on Sound

MEDIUM
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 12 - Sound>ASSESS YOURSELF>Q 4
A wave of frequency 10 Hz was observed to have a compression at a particular instance. Two subsequent time intervals when a compression will be repeated are (in seconds)
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 12 - Sound>ASSESS YOURSELF>Q 5
Sound is produced when
MEDIUM
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 12 - Sound>ASSESS YOURSELF>Q 6
A tuning fork when sounded close to the mouth of a pipe produces
MEDIUM
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 12 - Sound>ASSESS YOURSELF>Q 7
A pulse is allowed to get reflected from a wall. Then
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 12 - Sound>ASSESS YOURSELF>Q 8
Note is a sound
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 12 - Sound>ASSESS YOURSELF>Q 9
A key of a mechanical piano struck gently and then struck again but much harder this time. In the second case
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 12 - Sound>ASSESS YOURSELF>Q 10
In SONAR, we use
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 12 - Sound>ASSESS YOURSELF>Q 11
Sound travels in air if