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प्रश्न
Name three animals, which can hear ultrasonic vibrations.
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उत्तर
Mosquitos, bats, and dogs are the three animals that can hear ultrasonic vibrations.
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संबंधित प्रश्न
| Column A | Column B |
| (a) Vibrations cause | (1) absorb sound |
| (b) A shriller sound is | (2) second |
| (c) Unit of frequency | (3) sound |
| (d) Unit of time period | (4) of high pitch |
| (e) Curtains | (5) hertz |
Write the audible range of frequency for the normal human ear.
How is it possible to recognize a person by his voice without seeing him?
When we change a feeble sound to a loud sound, we increase its :
Before playing the orchestra in a musical concert, a sitarist tries to adjust the tension and pluck the strings suitably. By doing so he is adjusting :
Complete the following sentences :
Sound cannot travel through __________, but it requires a ___________.
The wavelength of the vibrations produced on the surface of water is 2 cm. If the wave velocity is 16 ms-1, calculate:
- no. of waves produced in one second
- time required to produce one wave.
Two tuning forks A and B of frequencies 256 Hz and 192 Hz respectively are vibrated in air. If the wavelength of A is 1.25 m, calculate the wavelength produced by B.
Suppose that a sound wave and a light wave have the same frequency, then which one has a longer wavelength?
