ICSE Class 9 Answered
PLEASE EXPLAIN THE GAMA THETA THEORY IN " SOUND" CHAPTER IN PHYSICS.
Asked by cbiswajit | 12 Oct, 2018, 07:59: PM
Expert Answer
Speed of the sound depends upon elasticity of medium and density of medium.
Thus,
At normal temperature and pressure, speed of sound was found to be 279.5 m/s using the above relation.
But experimentally it is 330 m/s.
So, Laplace made the correction in the above equation.
According to Laplace, the propagation of sound is adiabatic change and
E =γP
where, γ is ration of specific heat at constant pressure to the specific heat at constant volume.
γ = Cp/Cv
Hence the equation becomes,
γ depends on the nature of medium.
γ is 1.4 for air.
Speed of sound also depends upon the temperature of medium.
The speed of sound increases with the increase in the temperature.
The speed of sound increases by 0.61 m/s for each degree celsius rise in the temperature.
Thus,
Equation for the speed of sound at temperature is,
Answered by Shiwani Sawant | 15 Oct, 2018, 12:15: PM
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ICSE 9 - Physics
Asked by cbiswajit | 12 Oct, 2018, 07:59: PM
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