What is reverberation ?

Important Questions on Sound

EASY

9th CBSE

IMPORTANT

EVERGREEN Self-Study in SCIENCE>Chapter 13 - Sound>CHAPTER TEST>Q 3

What is SONAR ?

MEDIUM

9th CBSE

IMPORTANT

EVERGREEN Self-Study in SCIENCE>Chapter 13 - Sound>CHAPTER TEST>Q 4

Sound is produced by a vibrating source. Why then a vibrating pendulum does not produce any sound ?

EASY

9th CBSE

IMPORTANT

EVERGREEN Self-Study in SCIENCE>Chapter 13 - Sound>CHAPTER TEST>Q 5

What is the audible range for a normal human being ?

MEDIUM

9th CBSE

IMPORTANT

EVERGREEN Self-Study in SCIENCE>Chapter 13 - Sound>CHAPTER TEST>Q 6

Why sound waves are called mechanical waves ?

HARD

9th CBSE

IMPORTANT

EVERGREEN Self-Study in SCIENCE>Chapter 13 - Sound>CHAPTER TEST>Q 7

Why are ceilings of concert halls curved ?

HARD

9th CBSE

IMPORTANT

EVERGREEN Self-Study in SCIENCE>Chapter 13 - Sound>CHAPTER TEST>Q 8

Why sound wave is called a longitudinal wave ?

HARD

9th CBSE

IMPORTANT

EVERGREEN Self-Study in SCIENCE>Chapter 13 - Sound>CHAPTER TEST>Q 9

Why echoes can't be heard in a small room ?

MEDIUM

9th CBSE

IMPORTANT

EVERGREEN Self-Study in SCIENCE>Chapter 13 - Sound>CHAPTER TEST>Q 10

Why echoes in long gallery and big halls can be heard ?