EASY
9th CBSE
IMPORTANT
Earn 100

What is an ultrasound scanner?

Important Questions on Sound

EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 5 - Sound>Assignment>Q 26
How do our ears permit us to receive the sound?
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 5 - Sound>Assignment>Q 27
Draw diagram to represent sound of high pitch.
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 5 - Sound>Assignment>Q 27
Draw diagram to represent sound of low pitch of the same loudness.
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 5 - Sound>Assignment>Q 28
Echoes cannot be heard in a small room. Explain.
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 5 - Sound>Assignment>Q 29
A boy strikes one end of a long iron pipe with a stone. Another boy who keeps his ear close to the other end of the pipe heard two sounds in a short interval of time. Explain why?
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 5 - Sound>Assignment>Q 30
Mention two types of mechanical waves. Identify the type which can be produced in solids, liquids and gases.
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 5 - Sound>Assignment>Q 31
State two conditions for echo to be heard.
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 5 - Sound>Assignment>Q 32
Explain how ultra sound is used to clean spiral tubes?