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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.
The number of times a body vibrates in one second is called its ______.
Distinguish between compression and rarefaction.
Arrange the speed of sound in gases Vg, solids Vs and liquids VLin an ascending order.
The distance between three consecutive crests of wave is 60 cm. If the waves are produced at the rate of 180/ min, calculate:
- wavelength
- time period
- wave velocity.
How is sound produced?
What causes sound in air?
If the energy in a longitudinal wave travels from south to north, the particles of the medium would be vibrating in _____.
Suppose that a sound wave and a light wave have the same frequency, then which one has a longer wavelength?
The sound produced by a thunderstorm is heard 10 s after the lightning is seen. Calculate the approximate distance of the thunder cloud. (Given the speed of sound = 340 m s–1.)
