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Answer the following question in your own words. What should be the dimensions and the shape of classrooms so that no echo can be produced there? - Science and Technology

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प्रश्न

Answer the following question in your own words.

What should be the dimensions and the shape of classrooms so that no echo can be produced there? 

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उत्तर

  1. Ambient temperature and the distance between the source and the reflecting surface are important factors in the generation of echoes. A distance of at least 17.2 m between the source and the reflecting surface is required for a clear echo to be heard at 22°C.
  2. The classroom must be designed in such a way that the distance between two walls is less than 17.2 meters to avoid the formation of echoes.
  3. Also, the ceiling should be curved so that the reflection of sound waves is uniform throughout the room.
  4. Classrooms are generally rectangular in design to avoid echo generation.
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अध्याय 12: Study of Sound - Exercise [पृष्ठ १३७]

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बालभारती Science and Technology [English] 9 Standard Maharashtra State Board
अध्याय 12 Study of Sound
Exercise | Q 3. c. | पृष्ठ १३७

संबंधित प्रश्न

What is meant by an echo?


The minimum distance between the source and the reflector in air. So that an echo is heard is approximately equal to ______.


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Name the device which is used to address a small gathering of people.


Fill in the blank with suitable word : 
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What is an echo ? How is echo formed ?


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An echo-sounder in a trawler (fishing boat) receives an echo from a shoal of fish 0.4 s  after it was sent. If the speed of sound in water is 1500 m/s, how deep is the shoal ?


Answer the following question in your own words.

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State two conditions necessary for hearing an echo.


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