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प्रश्न
What name is given to those aircrafts which fly at speeds greater than the speed of sound?
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उत्तर
Supersonic aircraft are aircraft that fly at speeds greater than the speed of sound.
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संबंधित प्रश्न
In which of the three media, air, water or iron, does sound travel the fastest at a particular temperature?
Write the approximate speed of sound in air.
A boy on a hill A fires a gun. The other boy on hill B hears the sound after 4 s. If the speed of sound is 330 m s-1, find the distance between the two hills.
What is the speed of sound :
(a) in air?
(b) in water?
(c) in iron?
Calculate the frequency of a wave whose time-period is 0.02 s.
Fill in the blank with suitable word :
The speed of sound in a solid is ............... than the speed of sound in air.
The drawing shows a ship 800 m from a cliff. A gun is fixed on the ship. After 5 seconds the people at the front of the ship hear the sound of the gun again.
(a) What is the name of this effect ?
(b) What happens to the sound at the cliff ?
(c) How far does the sound travel in 5 seconds ?
(d) Calculate the speed of sound.
The speed of highly penetrating ultrasonic waves is :
The Velocity of sound is high in gases than liquids.
Assertion: The speed of sound in air is less than the speed of sound in solid.
Reason: If we increase the temperature of medium, the speed of sound increases in any medium.
