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प्रश्न
Sound can travel through solids, gases, liquids, and even vacuum.
पर्याय
True
False
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उत्तर
Sound can travel through solids, gases, liquids, and even vacuum - false.
Reason:
Sound can not travel in a vacuum. This is because sound waves are vibrating waves. In a vacuum, where there are no atoms or molecules to vibrate.
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संबंधित प्रश्न
What is sound? What type of waves are sound wave in air?
At 20°C, the minimum distance of a person from a sound reflecting surface to hear an echo is :
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.
How is the sound produced?
A person fires a gun and other boy at a distance hears the sound of the fire 2.5 s after seeing the flash. If the speed of sound in air is 330 ms-1, find the distance between the boys.
Explain how the principle of echo is used by
The dolphin to locate small fish as its prey.
Sound travels in air:
A key of a mechanical piano struck gently and then struck again but much harder this time. In the second case
What happens to the speed of sound when it gases from a solid to a gaseous state?
