  It is analyzed what fundamental new information for the properties of the
superconductors can be obtained by systematic investigation of the Bernoulli
effect. It is shown that it is a tool to determine the effective mass of Cooper
pairs, the volume density of charge carriers, the temperature dependence of the
penetration depth and condensation energy. The theoretical results for
disordered and anisotropic gap superconductors are systematized for this aim.
For clean-anisotropic-gap superconductors is presented a simple derivation for
the temperature dependence of the penetration depth
