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प्रश्न
Give a scientific reason.
If you were both on the moon, your friend will not be able to hear you call.
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उत्तर
We know that sound cannot travel through a vacuum. Since there is no atmosphere on the moon, we cannot hear sound on the moon.
संबंधित प्रश्न
Fill in the blank.
We can hear sounds of frequency in the range of _______
List the measures that you will take when designing a sound-proof room.
What type of wave is represented :
(a) by density-distance graph?
(b) by displacement-distance graph?
Draw displacement-time graph of a wave and show on it the amplitude and time period of 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.
What is the effect of temperature and pressure on the speed of sound in a gas?
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 |
A sound wave travels 2000 m in 8 s. What is the velocity of the sound?
Which of the following vibrates when a musical note is produced by the cymbals in a orchestra?
