1.

The equation of displacement due to a sound wave is s=`s_0`sin^(2)((wt-kx)). if the bulk modulus of the medium is `B`, then the equation of pressure variation due to that sound isA. `B k s_(0) sin(2 omega t-2 k x)`B. `-B k s_(0) sin(2 omega t-2 k x)`C. `B k s_(0)cos^(2) ( omegat-kx)`D. `-B k s_(0)cos^(2) ( omegat-kx)`

Answer» Correct Answer - A
The equation of pressure variation due to sound is
`p=-B(ds)/(dx)=-B(d)/(dx)[s_(0)sin^(2)(omegat-kx)]`
`=Bks_(0)sin (2 omegat-2kx)`


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