The virial theorem states that the total kinetic energy of the objects in a
spherical, self-gravitating, stable assembly is equal to negative 1/2 times the total gravitational potential energy, if the objects can be assumed to have equal masses.
... no husband present, and 42.6% are non-families. 29.5% of all households are made up of individuals and 4.9% have someone living alone who is 65 years of age or older. The ...