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When a bird flaps its wings, do you hear...

When a bird flaps its wings, do you hear any sound ?

Text Solution

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Yes, sound is produced by the bird due to conversion of mechanical energy spent in flapping the wings.
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Knowledge Check

  • A car fitted with a device which transmits sound 60 times per minute. There is no wind and speed of sound in still air is 345 m/s. If you hear the sound 68 times per minute when you are moving towards the car with a speed of 12 m/s, the speed of the car must be nearly.

    A
    20.0 m/s towards
    B
    30.0 m/s towards you
    C
    10.0 m/s away from you
    D
    10.0 m/s towards you

  • Suppose you and your friend are on the Moon. Will you be able tyo hear any sound produced by your friend ?

    A
    Yes, but it will depend upon the distance between me and my friend
    B
    No, because there is no atmosphere on the moon
    C
    Yes, sound waves can travel anywhere
    D
    Cannot be determined

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    If the velocity of sound in a medium is 1400 m s^(-1) , and its wavelength is 1 km, what is its frequency? Can you hear this sound?

    The sound from a mosquito is produced, when it vibrates by its wings, at an average rate of 500 vibrations per seconds. What is the time period of the vibrations ?

    The sound from an insect is produced when it vibrates its wings at an average rate of 200 vibrations per second. What is the time period ?

    The sound from a mosquito is produced when it vibrates its wings at an average rate of 500 vibrations per second. What is the time period of the vibration?

    The sound from the mosquito is produced when it vibrates its wings at an average rate of 500 vibrations per second. What is the time period of the vibration ?

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