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प्रश्न
Rapid back and forth motion of a particle about its mean position is called _____.
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उत्तर
Rapid back and forth motion of a particle about its mean position is called vibrations.
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संबंधित प्रश्न
Distinguish between loudness and intensity of sound.
Write true or false for a given statement.
Larger is the amplitude, feeble is the sound.
Give two examples each of longitudinal waves and transverse waves.
Explain the terms 'compressions' and 'rarefactions' of a wave. What type of waves consist of compressions and rarefactions.
Explain the terms 'crests' and troughs' of a wave? What type of waves consist of crests and troughs?
Which one of the following does not consist of transverse waves?
What do you mean by the term frequency of a wave? State its S.I. unit.
Match the following
| 1. | Infrasonic | (a) | Compressions |
| 2. | Echo | (b) | 22 kHz |
| 3. | Ultrasonic | (c) | 10 Hz |
| 4. | High-pressure region | (d) | Ultrasonography |
Give scientific reasons.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
