Home
Class 9
PHYSICS
In a closed box if you say hello, the so...

In a closed box if you say hello, the sound heard will be Hellooooo….. What does it mean?

Promotional Banner

Topper's Solved these Questions

  • SOUND

    NCERT TAMIL|Exercise Let us Improve our learning ( Reflections on concepts)|12 Videos

  • SOUND

    NCERT TAMIL|Exercise Let us Improve our learning (Application of concepts)|8 Videos

  • SOUND

    NCERT TAMIL|Exercise Problems|4 Videos

  • REFRACTION OF LIGHT AT PLANE SURFACES

    NCERT TAMIL|Exercise THINK AND DISCUSS|2 Videos

  • UNIVERSE

    NCERT TAMIL|Exercise Problem|2 Videos

Similar Questions

Explore conceptually related problems

What does Aves mean?

What does MSL means?

What does in vitro mean?

What does anatomy mean?

What does Reptilia mean?

What does mammalia mean?

What does bioassay mean?

What does INOTAXA mean?

What does Amphibian mean?

What does draw wing mean?

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |