Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
free energy | Yes | No | No | No |
rest energy | Yes | No | No | No |
free energy (noun) | rest energy (noun) |
---|---|
(physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs | the energy equivalent to the mass of a particle at rest in an inertial frame of reference; equal to the rest mass times the square of the speed of light |