MEDIUM
9th CBSE
IMPORTANT
Earn 100

What is the difference between a compression and rarefaction in a sound wave? Illustrate your answer with a sketch.

Important Questions on Sound

EASY
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Long Answer Type Questions>Q 60
What is sound? What type of waves are sound waves in air?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Long Answer Type Questions>Q 60
Describe an experiment to show that sound cannot pass through a vacuum?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Long Answer Type Questions>Q 61
How is the sound produced? Explain with the help of an example.
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Long Answer Type Questions>Q 61
How does sound from a sound-producing body travel through the air to reach our ears? Illustrate your answer with the help of a labelled diagram.
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Long Answer Type Questions>Q 62
An electric bell is suspended by thin wires in a glass vessel and set ringing. Describe and explain what happens if the air is gradually pumped out of the glass vessel.
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Long Answer Type Questions>Q 62
Why cannot a sound be heard on the moon? How do astronauts talk to one another on the surface of the moon?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Long Answer Type Questions>Q 63
Define the terms 'frequency', 'wavelength', and 'velocity' of a sound wave. What is the relation between them?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Long Answer Type Questions>Q 63

A body vibrating with a time period of 1256 s produces a sound wave which travels in the air with a velocity of 350 ms-1. Calculate the wavelength.