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9th ICSE
IMPORTANT
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What is SONAR? 

Important Questions on Sound

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9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 7 - Sound>PRACTICE QUESTIONS>Q 4
Draw a curve showing density or pressure variations with respect to distance for a disturbance produced by sound. Mark the position of compression and rarefaction on this curve.
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9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 7 - Sound>PRACTICE QUESTIONS>Q 5
Bats can ascertain distances, directions, nature and size of objects, how?
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9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 7 - Sound>PRACTICE QUESTIONS>Q 6
Differentiate between transverse wave and longitudinal wave.
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9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 7 - Sound>PRACTICE QUESTIONS>Q 7

How does the density affect the speed of sound (Both in material and in gas)?

EASY
9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 7 - Sound>PRACTICE QUESTIONS>Q 7
How does the following factors affect the speed of sound (Both in material and in gas):
Wind.
EASY
9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 7 - Sound>PRACTICE QUESTIONS>Q 8
Write down the properties of ultrasound. State the approximate speed of ultrasound in air.
EASY
9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 7 - Sound>PRACTICE QUESTIONS>Q 9
Differentiate between ultrasonic and subsonic. Also define the term supersonic.
EASY
9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 7 - Sound>Self Evaluation Test>Q 1
A wave vibrates up and down five times in 0.5 s and it covers a distance of 7 m during this interval. Calculate frequency of the wave.