Infer whether a system can have kinetic energy and potential energy at the same time

A system can have kinetic and potential energy, for example, an object falling but it hasn't reached the ground. It's still in the air, and has "potential" to go faster or hit something on it's way down, but since it's moving it also has kinetic energy. 

White dwarfs are much more common than black holes in galaxies. The reason for this is that black holes are the remnants (final states) of extremely massive stars (> 25 solar masses) while white dwarfs are the remnants of intermediate and low mass stars (< 10 solar masses).

Explanation:

White dwarfs are much more common than black holes in galaxies. The reason for this is that black holes are the remnants (final states) of extremely massive stars (> 25 solar masses) while white dwarfs are the remnants of intermediate and low mass stars (< 10 solar masses).