EASY
9th CBSE
IMPORTANT
Earn 100

Differentiate between crest and trough.

Important Questions on Sound

HARD
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>Summative Assessment Some Solved CBSE Sample Questions>Q 15
When person uses deodorant spray, the other person standing at a distance would hear the sound of spraying first and the fragrance of the spray would reach him later. Why so?
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>Summative Assessment Some Solved CBSE Sample Questions>Q 16
Echoes can't be heard in a small room. Explain.
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>Summative Assessment Some Solved CBSE Sample Questions>Q 17
Give one advantage and one disadvantage of reverberation.
MEDIUM
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>Summative Assessment Some Solved CBSE Sample Questions>Q 18
Give three medical uses of ultrasound.
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>Summative Assessment Some Solved CBSE Sample Questions>Q 19
Give example of multiple echoes.
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>Summative Assessment Some Solved CBSE Sample Questions>Q 20
Explain how ultrasound is used to clean spiral tubes and electronic components.
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>Summative Assessment Some Solved CBSE Sample Questions>Q 21
Name the physical quantity whose unit is Hertz.
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>Summative Assessment Some Solved CBSE Sample Questions>Q 22
Why do we hear sound of humming bees while the sound of vibrations of pendulum is not heard?