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2. Free energy suppression conspiracy theory - Wikipedia

   en.wikipedia.org/wiki/Free_energy_suppression...

   However, his system was only intended to transmit energy for free; the system's energy would still need to be generated through conventional means. [20] Notable proponents of the conspiracy theory include Gary McKinnon, a Scottish computer hacker who unlawfully accessed computer systems to look for evidence of a secret free energy device. [21]

3. Free energy - Wikipedia

   en.wikipedia.org/wiki/Free_energy

   Free-energy relationship, a relationship in physical organic chemistry; Principle of minimum energy, a thermodynamic formulation based on the second law; Thermodynamic free energy, the energy in a physical system that can be converted to do work, including: Gibbs free energy; Landau free energy (also known as grand potential) Helmholtz free energy

4. Free energy principle - Wikipedia

   en.wikipedia.org/wiki/Free_energy_principle

   The free energy principle is a mathematical principle of information physics: much like the principle of maximum entropy or the principle of least action, it is true on mathematical grounds. To attempt to falsify the free energy principle is a category mistake, akin to trying to falsify calculus by making empirical observations. (One cannot ...

5. Thermodynamic free energy - Wikipedia

   en.wikipedia.org/wiki/Thermodynamic_free_energy

   Therefore, only relative free energy values, or changes in free energy, are physically meaningful. The free energy is the portion of any first-law energy that is available to perform thermodynamic work at constant temperature, i.e., work mediated by thermal energy. Free energy is subject to irreversible loss in the course of such work. [1]

6. History of perpetual motion machines - Wikipedia

   en.wikipedia.org/wiki/History_of_perpetual...

   In the 1910s and 1920s, Harry Perrigo of Kansas City, Missouri, a graduate of MIT, claimed development of a free energy device. [24] Perrigo claimed the energy source was "from thin air" or from aether waves. He demonstrated the device before the Congress of the United States on December 15, 1917.

7. Micro hydro - Wikipedia

   en.wikipedia.org/wiki/Micro_hydro

   There are many of these installations around the world, particularly in developing nations as they can provide an economical source of energy without the purchase of fuel. [2] Micro hydro systems complement solar PV power systems because in many areas water flow, and thus available hydro power, is highest in the winter when solar energy is at a ...