  The outcome of this paper was a shape of the interaction of two oscillating
bubbles. This was done to express the secondary Bjerknes force using the
Maxwell equations for a liquid. These subsequent equations were written for the
quantities velocity, pressure, and density as deviations from steady state.
Also, as it will show in the following rows, we found the expressions of the
acoustic charge and of the acoustic intensity. Our results may facilitate the
adoption of an approach for the interaction of two vortices and for the
entrapment of a bubble by a vortex. This approach leads to a model for an
acoustic charged particle which has internal angular momentum.
