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प्रश्न
The bees do not have voice-boxes. How do they produce sound ?
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उत्तर
The bees do not have the voice-boxes. Still they produce sound.
This happens by the vibrations produced by the quick movement of their wings. Bees buzz while flying and depositing pollen among flowers.
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संबंधित प्रश्न
Fill in the blank.
The number of times a body vibrates in one second is called its ______.
Fill in the blank.
The pitch of a sound depends on its ________.
What is sound ?
Which wave property determines pitch?
Distinguish between loudness and intensity of sound.
Define sound ranging.
The distance between three consecutive crests of wave is 60 cm. If the waves are produced at the rate of 180/ min, calculate:
- wavelength
- time period
- wave velocity.
How do the following factor affect the speed of sound in air?
Temperature of air
Draw a curve showing density or pressure variations with respect to distance for a disturbance produced by sound. Mark the position of compression and rarefaction on this curve. Also, define wavelengths and time periods using this curve.
