Free energy

First law of thermodynamics : Energy can be neither created nor destroyed, only change forms.
Anonymous: How big is the potential?

''Free energy'', in a strict sense, is energy directly transceived from the environment, and utilized without any artificial aid (electromagnetic ''free energy'' is sometimes referred to as "''radiant energy''"). ''Free energy'' can also mean a primary energy source that is "''free''" (i.e. does not cost anything) for consumption. The term "free energy" in this sense is usually associated with machines employing utilizing atmospheric electricity, conducting telluric currents, convert atmospheric pressure changes, employing rotating magnets, perturbing the quantum vacuum, or cracking hydrogen, and used by proponents of hypothetical perpetual motion machines (no such ''true'' machine is known to exist (primarily because of wear and friction)).

Conservation law

The conservation law means that there is nature, which you can manipulate, at one moment — and as nature undergoes its multitude of changes, this nature doesn't change. That is, if you manipulate it again, this quantity, it'll be the same as it was before. An example is the conservation of energy: there's a quantity that you can manipulate according to a certain rule, and it comes out the same result after, no matter what happens, happens.

Adapted from Richard P. Feynman1

In engineering, ''free energy'' means an energy source available directly from the environment and which cannot be depleted (so it is available in effectively unlimited quantity). ''Free energy'' here is equated with renewable energy, which does not include energy sources which are dependent upon limited resources.

In conspiracy theories, free energy suppression is the notion that corporate energy interests deliberately suppress technology that would either provide energy at very little cost (like the above mentioned perpetual motion machines), or reduce energy use to negligible levels, thus affecting the profits of the existing trillion dollar energy infrastructure. Examples include the allegations that light-bulb companies secretly own the patents to light bulb designs that never burn out, or that fuel companies are sitting on designs for highly efficient vehicles.

In thermodynamics the term ''free energy'' denotes the total amount of energy in a system which can be converted into work. Helmholtz free energy: the amount of energy which can be converted into work at constant temperature and volume. In chemistry, this quantity is called work content. Gibbs free energy is the amount of energy in a fluid system which can be converted into work at constant temperature and pressure. This is the most relevant state function for chemical reactions in open containers.

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