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Why are sound waves called mechanical wa...

Why are sound waves called mechanical waves ?

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Sound waves needs material medium to propagate therefore, they are called mechnical waves.Sound waves propagate through a medium because of theinteraction of the particles present in that medium.
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NCERT-SOUND -Exercise
  1. How does the sound produced by a vibrating object in a medium reach yo...

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  2. Explain how sound is produced by your school bell ?

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  3. Why are sound waves called mechanical waves ?

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  4. Suppose you and your friend are on the Moon. Will you be able to hear ...

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  5. Which wave property determines (a) loudness (b) Pitch ?

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  6. Guess which has a higher pitch : a guitar or a car horn ?

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  7. What are wavelength, frequency, time period and amplitude of a sound w...

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  8. How are the wavelength and frequency of a sound wave related to its sp...

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  9. Calculate the wavelength of a sound wave whose frequency is 220 Hz and...

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  10. A person is listening to a tone of 500 Hz sitting at a distance of 450...

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  11. Distinguish between loudness and intensity of sound.

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  12. In which of the three media : air, water or iron , does sound travel t...

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  13. An echo is returned in 3 s. What is the distance of the reflecting sur...

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  14. Why are the ceilings of concert halls curved ?

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  15. What is the audible range of the average human ear ?

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  16. What is the range of frequencies associated with (a) infra sound (...

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  17. A submarine emits a sonar pulse, which returns from an underwater clif...

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  18. What is sound and how is it produced ?

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

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  20. Cite an experiment to show that sound needs a material for its propaga...

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