EASY
9th CBSE
IMPORTANT
Earn 100

Draw a pictorial form of a longitudinal wave, showing clearly the regions of compression and rarefaction.

Important Questions on Sound

EASY
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 5 - Sound>EXERCISE>Q 9
What is a sonar? Briefly describe how sonar works.
MEDIUM
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 5 - Sound>EXERCISE>Q 10
 A person stands 10 m away from a high wall and explodes a cracker. He does not hear an echo. Explain.
EASY
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 5 - Sound>EXERCISE>Q 1
 What do you understand by the term sound energy?
MEDIUM
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 5 - Sound>EXERCISE>Q 1
State three conditions necessary for hearing sound.
EASY
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 5 - Sound>EXERCISE>Q 2
State the laws of reflection of sound.
EASY
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 5 - Sound>EXERCISE>Q 2
 Describe an experiment to prove the law of reflection of sound.
EASY
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 5 - Sound>EXERCISE>Q 3
What do you understand by the term echo?
EASY
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 5 - Sound>EXERCISE>Q 3
State three conditions necessary for an echo.