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9th CBSE
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 A longitudinal wave travels in water from west to east. The direction which the particles of medium move : 

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Important Questions on Sound

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9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 5 - Sound>EXERCISE>Q 26
 A stretched string is plucked gently to produce a note. The string is producing:
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9th CBSE
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Core Science Physics For Class 9>Chapter 5 - Sound>EXERCISE>Q 27
 A stretched slinky is given a sharp push along its length. A wave travels from one end to another. The wave so produced is :
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9th CBSE
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Core Science Physics For Class 9>Chapter 5 - Sound>EXERCISE>Q 28
 A longitudinal sound wave in air consists of :
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9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 5 - Sound>EXERCISE>Q 29
The density of air at some point in a longitudinal sound wave is minimum at an instant. The pressure of air at that point is :
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9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 5 - Sound>EXERCISE>Q 30
 Which of the following is an elastic wave?
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9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 5 - Sound>EXERCISE>Q 31
Infrasonic vibrations have frequency:
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9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 5 - Sound>EXERCISE>Q 32
 The range of sonic waves is between :
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9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 5 - Sound>EXERCISE>Q 33
 The sound waves having a frequency more than 20,000 Hz are called :