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Why are sound waves called mechanical waves?
Define time period.
List four substances which are good absorbers of sound.
Draw a displacement-distance graph of a wave and mark on it, the amplitude of wave by the letter 'a' and wavelength of wave by the letter λ.
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
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From diagram given below calculate:
- velocity of P and Q
- frequency of P, when frequency of Q is 512 Hz.
Assume that both wave are traveling in same medium.
How do the following factor affect the speed of sound in air?
Pressure in air.
Name the factors on which the speed of sound depends.
Explain how the principle of echo is used by
The dolphin to locate small fish as its prey.
A list of mediums is given below.
- wood
- water
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In which of these mediums can sound travel?
