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प्रश्न
Explain how the principle of echo is used by
The bat during its flight at night
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उत्तर
Bats emits its own distinctive sounds. The echoes of the sound help bat to navigate and to locate their prey during night.
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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 |
What is sound ?
The flash of a gun is seen by a man 3 seconds before the sound is heard. Calculate the distance of the gun from the man (Speed of sound in air is 332 m/s).
Complete the following sentences :
Sound cannot travel through __________, but it requires a ___________.
Select the correct option:
A part of the longitudinal wave in which particles of the medium are closer than the normal particles is called:
What is the value of sound of room temperature?
Match the following
| 1. | Infrasonic | (a) | Compressions |
| 2. | Echo | (b) | 22 kHz |
| 3. | Ultrasonic | (c) | 10 Hz |
| 4. | High-pressure region | (d) | Ultrasonography |
Mention two cases in which there is no Doppler effect in sound?
Sound cannot travel through ______.
