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Why do we put cushions on the chairs, ca...

Why do we put cushions on the chairs, carpet on the floor, straw materials on the walls in cinema halls?

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NCERT TAMIL-SOUND-Think and Discuss
  1. What change would you expect in the characteristic of a musical sound ...

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  2. What could be the reason for better reflection of sound by rough surfa...

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  3. Why is an echo weaker than the original sound ?

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  4. In a closed box if you say hello, the sound heard will be Hellooooo….....

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  5. What is the advantage of having conical openings in Horns, megaphones ...

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  6. Why do we put cushions on the chairs, carpet on the floor, straw mater...

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  7. What is the benefit of using ultrasound over light waves in the above ...

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  8. Do compressions and rarefactions in sound wave travel in same directio...

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  9. Does the frequency of sound waves depend on the medium in which it tra...

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  10. The frequency of source of sound is 10Hz. How many times does it vibra...

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  11. Gently strike a hanging bell (temple bell) and try to listen to the so...

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  12. During a thunderstorm if you notice a 3 second delay between the flash...

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  13. Two girls are playing on identical stringed instruments. The strings o...

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  14. What change would you expect in the characteristic of a musical sound ...

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  15. What could be the reason for better reflection of sound by rough surfa...

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  16. Why is an echo weaker than the original sound ?

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  17. In a closed box if you say hello, the sound heard will be Hellooooo….....

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    |

  18. What is the advantage of having conical openings in Horns, megaphones ...

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    |

  19. Why do we put cushions on the chairs, carpet on the floor, straw mater...

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  20. What is the benefit of using ultrasound over light waves in the above ...

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