Q7. a) Arrange the speed of sound
in a DECREASING ORDER while
travelling in the following objects:
water , air , iron block. (1)
b) Explain the effect of: (2)
i) Increasing amplitude on loudness
of sound,
ii) Decreasing frequency on
shrillness of sound.
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The speed of sound is defined as the dynamic propagation of sound waves. This depends on the characteristics of the medium through which the propagation takes place. Speed of sound is used for describing the speed of sound waves in an elastic medium.
Speed of Sound Formula
The formula for speed of sound is given with respect to gases. It is the square root of the product of the coefficient of adiabatic expansion and pressure of the gas divided by the density of the medium. The mathematical representation is given as:
v=γPρ−−−√
Where,
v is the speed of sound
γ is the coefficient of adiabatic expansion
P is the pressure of the gas
ρ is the density of the medium
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