The equation of displacement due to a sound wave is s=s0sin2(ωt−kx). If the bulk modulus of the medium is B, then the equation of pressure variation due to that sound is
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a
Bks0sin(2ωt−2kx)
b
−Bks0sin(2ωt−2kx)
c
Bks0cos2(ωt−kx)
d
−Bks0cos2(ωt−kx)
answer is A.
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Detailed Solution
The equation of pressure variation due to sound is p=−Bdsdx=−ddxs0sin2(ωt−kx)=Bks0sin(2ωt−2kx)