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Describe with the help of a diagram, how...

Describe with the help of a diagram, how compressions and rarefactions are produced in air near a source of sound.

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Assertion : Sound waves travel in the form of compressions and rarefactions in air. Reason : Because crests and troughs cannot be sustained in air, therefore, sound waves cannot travel through air in the form of transverse waves.

PRADEEP-SOUND-NCERT Exercise
  1. What is sound and how is it produced ?

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  2. Describe with the help of a diagram, how compressions and rarefactions...

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  3. Cite an experiment to show that sound needs a meterial for its propaga...

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  4. Why is sound wave called a longitudinal wave ?

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  5. Which characteristic of the sound helps you to identify your friend by...

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  6. Flash ans thunder are produced simultaneously. But thunder is heard a ...

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  7. A person has a hearing range from 20 Hz to 20 kHz. What are the typica...

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  8. Two children are at opposite ends of an aluminium rod. One strikes the...

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  9. The frequency of a source of sound is 100 Hz. How many times does it v...

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  10. Does sound follow the same laws of reflection as light does ? Explain.

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  11. When a sound is reflected from a distant object, an echo is produced. ...

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  12. Give two practical applications of reflection of sound waves.

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  13. A stone is dropped from the top of a tower 500 m high into a pond of w...

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  14. A sound wave travels at a speed of 339 m//s. If its wavelength is 1.5 ...

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  15. What is reverberation ? How can it be reduced ?

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  16. What is loudness of sound ? What factors does it depend on ?

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  17. Explain how bats use ultrasound to catch a prey.

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  18. How is ultrasound used for cleaning ?

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  19. Explain the working and application of a sonar.

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  20. A sonar device on a submarine sends out a signal and receives an echo ...

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