Not too interested in energy density per unit mass.

The loss of kinetic energy per unit mass becomes V/2.

So the potential can be interpreted as the negative of the work done by the gravitational field moving a unit mass in from infinity.

Since bubbles have a large volume per unit mass, they displace a lot of the fluid.

Specific heat is usually cited in heat capacity per unit mass.

However, effects depend on the energy per unit mass, not the exposure measured in air.

The gravity potential is the gravitational potential energy per unit mass.

Material resources may best be evaluated with data on emergy per unit mass.

Specific energy is defined as energy per unit mass.

It would release more energy per unit mass than any other reaction known to science.