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प्रश्न
What causes sound?
एका वाक्यात उत्तर
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उत्तर
Sound is caused due to vibrations of a body.
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या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
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 do you mean by wave-velocity?
Describe a simple experiment to determine the speed of sound in air. What approximation is made in the method described by you?
Select the correct option:
In case of longitudinal waves, the particles of the medium vibrate:
Can you hear each other in a dark room?
What is the SI unit of frequency?
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?
An earthquake produces which kind of sound before the mainshock wave begins
What is a wave?
