The problem of the charged spheroidal bubble is studied using the
virial method. The conditions that are necessary for equilibrium are
deduced and the oscillation of the bubble is studied . The frequencies
belonging to the second order harmonics are found .
Further extension of the virial theorem is made by studying the
viscous fluid sphere in an incompressible viscous fluid giving the
different and necessary virial equations of motion for both the
exterior and the interior media and then the equilibrium state is
studied.
