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Why are the ceilings of concert halls cu...

Why are the ceilings of concert halls curved ?

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Why are the ceilings of concert halls made curved? Draw a labelled diagram to illustrate your answer.

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MBD -HARYANA BOARD-SOUND-Example
  1. In which of the three media : air, water or iron , does sound travel t...

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

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  3. Why are the ceilings of concert halls curved ?

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

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

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

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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 a diagram, how compressions and rarefactions...

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

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

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  12. Does sound need a medium to travel? Describe an activity to show that ...

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  13. Why is sound wave called a longitudinal wave ?

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

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  15. Which characteristic of the sound helps 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 are the typica...

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

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

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