ABSTRACT
As we have already repeatedly noted, the linearized equations of hydrodynamics (II.5), (II.12), and (II.16) are exact only in the limit of infinitesimal perturbations and, therefore, a solution of the linear wave equation of the type v=vmax sin ω(t-x/c0) https://s3-euw1-ap-pe-df-pch-content-public-u.s3.eu-west-1.amazonaws.com/9780429332227/64e5e3df-c95f-4a2a-a02e-98ef4c2d440f/content/equ4_1.tif"/>
