question_answer

A plane longitudinal wave having angular frequency \[\omega =500\text{ }rad/sec\] is travelling in positive x-direction in a medium of density \[\rho =1\text{ }g/{{m}^{3}}\]and bulk modulus\[4\times {{10}^{4}}N/{{m}^{2}}\]. The loudness at a point in the medium is observed to be 20 dB. Assuming at t = 0 initial phase of the medium particles to be zero. The maximum pressure change in the medium is \[K\times {{10}^{-4}}N/{{m}^{2}}\]. Find the value of K.

Answer:

2