EASY
9th CBSE
IMPORTANT
Earn 100

Explain the term 'amplitude'. Write its SI unit.

Important Questions on Sound

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 2
A tuning fork has a number 384 marked on it. What does this number signify?
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 3
Derive the relationship between time period and frequency.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 4
Explain the term 'wave velocity'. Write its SI unit.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 5
A boat at anchor is rocked by wave whose crests are 100 m apart and whose velocity is 25 ms. How often do the crests reach the boat?
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 6
Sound waves travel with a speed of about 330 ms. What is the wavelength of sound whose frequency is 550 hertz?
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 7

A wave pulse on a string moves a distance of 8 m in 0.05 s.

a. Find the velocity of the pulse.

b. What would be the wavelength of the wave on the same string if its frequency is 200 Hz?

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 8
Ocean waves of time period 10 s have a speed of 15 ms. What is the wavelength of these waves?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 9
A boat at anchor is rocked by waves whose crests are 100 m apart. The wave velocity of the moving crest is 20 ms. What is the frequency of rocking of the boat?