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When a sound is reflected from a distant...

When a sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound production remain the same. Do you hear echo sound on a hotter day ?

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MBD -HARYANA BOARD-SOUND-Example
  1. The frequency of a source of sound is 100 Hz. How many times does it v...

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

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  3. When a sound is reflected from a distant object, an echo is produced. ...

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  4. Give two practical applications of reflection of sound waves.

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  5. A stone is dropped from the top of a tower 500 m high into a pond of w...

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  6. A sound wave travels at a speed of 339 m//s. If its wavelength is 1.5 ...

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  7. What is reverberation ? How can it be reduced ?

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  8. What is loudness of sound ? What factors does it depend on ?

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  9. Explain how bats use ultrasound to catch a prey.

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  10. How is ultrasound used for cleaning ?

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  11. Explain the working and application of a sonar.

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  12. Write the full name of SONAR. How will you determine the depth of a se...

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  13. Write full form of SONAR. List any two purposes for which, it is used ...

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  14. A sonar device on a submarine sends out a signal and receives an echo ...

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  15. Explain how defects in a metal block can be detected using ultrasound.

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  16. Explain how the human ear works.

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  17. Name two different types of waves. Give an experiment to explain the ...

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  18. Name two different types of waves. Define transverse waves.

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  19. Name two different types of waves. What should be the conditions for...

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  20. Name two different types of waves. Give examples of transverse waves.

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