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प्रश्न
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उत्तर
Applications of supersonics:
1. Jet aircrafts
2. Rockets
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संबंधित प्रश्न
Write true or false for a given statement.
Loudness depends on frequency.
At 20°C, the minimum distance of a person from a sound reflecting surface to hear an echo is :
Sound is generated by the rhythmic ______ of an object.
How is the sound produced?
Select the correct option:
A part of the longitudinal wave in which particles of the medium are closer than the normal particles is called:
A thin metal plate is placed against the teeth of cog wheel. Cog wheel is rotated at a speed of 120 rotations per minute and has 160 teeth. Calculate:
- frequency of node produced.
- speed of sound, if wavelength is 1.05 m.
- what will be the effect when the speed of cog wheel is doubled?
Can we produce sound in vacuum?
Sound cannot travel through ______.
Give scientific reasons.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
