EASY
9th ICSE
IMPORTANT
Earn 100

Draw the displacement-distance graph of a wave.

Important Questions on Sound

EASY
9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 7 - Sound>Self Evaluation Test>Q 12
A source of wave produces 20 crests and 20 troughs in 0.2 s. Calculate the frequency of wave.
EASY
9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 7 - Sound>Self Evaluation Test>Q 13
State four applications of ultrasound.
EASY
9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 7 - Sound>Self Evaluation Test>Q 14
How does sound propagate in air? 
MEDIUM
9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 7 - Sound>Self Evaluation Test>Q 15
Ocean waves of 0.125 Hz  have velocity 12.5 m/s. Find the wavelength of these waves. Also, find the horizontal distance between a wave crest and its adjoining wave trough.