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Why are the ceilings of concert halls cu...

Why are the ceilings of concert halls curved?

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MBD-SOUND-Example
  1. In which of the three media, air, water or iron sound travel the faste...

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  2. An echo returned in 3 s. What is the distance of reflecting surface fr...

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  3. Why are the ceilings of concert halls curved?

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

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  5. What is the range of frequencies associated with : infrasound ?

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  6. What is the range of frequencies associated with: ultrasound?

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  7. A submarine emits a sonar pulse, which returns from underwater cliff i...

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  8. What is sound and how is it produced ?

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

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  10. Cite an experiment to show that sound need a material medium for its p...

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  11. Describe an experiment to show that sound need a material medium for i...

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  12. Describe an activity to show that sound is a mechanical wave and need ...

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  13. Why is sound wave called longitudinal wave?

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  14. Which characteristic of the sound help you to identify your friend by ...

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  15. Which characteristic of the sound help you to identify your friend by ...

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  16. Flash and thunder are produced simultaneously. But thunder is heard a...

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  17. A person has a hearing range from 20 Hz to 20 KHz. What is the typical...

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

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  19. The frequency of source of sound is 100 Hz. How many times does it vib...

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

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