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प्रश्न
Vibration of object produces ______.
रिकाम्या जागा भरा
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उत्तर
Vibration of object produces Sound
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संबंधित प्रश्न
What is the range of hearing for a normal person?
Name three factors on which the frequency of vibration of a stretched string depends.
A cannon is fired at A (see diagram). An observer at B hears two sounds. The first sound is heard after 1 second and the second 3s after the observer sees the flash. (Velocity of sound = 340 ms−1)
(i) Why does the observer see the flash before he hears the sound?
(ii) Calculate the distance x between the observer and the wall.
Can you hear each other in a dark room?
What is the SI unit of frequency?
Match the following.
| Ultrasonics | Frequency below 20Hz |
| Speed of sound in air | Needs material medium |
| Infrasonics | 330ms-1 |
| Sound propagation | Frequency more than 20000 Hz |
Match the following.
| 1. | Tuning fork | The point where density of air is maximum |
| 2. | Sound | Maximum displacement from the equilibrium position. |
| 3. | Compressions | The sound whose frequency is greater than 20,000 Hz. |
| 4. | Amplitude | Longitudinal wave. |
| 5. | Ultasonics | Production of sound. |
Rapid back and forth motion of a particle about its mean position is called _____.
Sound can travel through solids, gases, liquids, and even vacuum.
Write any two uses of ultrasonic sound.
