Question

Calculate the bulk modulus of air from the following data about a sound wave of wavelength 35 cm travelling in air. The pressure at a point varies between `(1.0xx 10^5+-14)` Pa and the particles of the air vibrate in simple harmonic motion of amplitude` 5.5 x 10^-5m.

Answer 1

Correct Answer - A::B::D
`Delta p_(max) = BAK`
`B = (Delta p_(max))/(Ak) = (Delta p_(max))/(A(2 pi//lambda))`
`= ((Delta p_(max))lambda)/(2 pi A)`
`= ((14)(0.35))/((2 pi)(5.5 xx 10^(-6)))`
`= 1.4 xx 10^(5)N//m^(2)`