![]() ![]() One of the valuable artifacts recovered is a pair of 1cm cubes that rotate in opposite directions about once a minute, no matter what. Discworld: Alluded to at the end of The Fifth Elephant.The main focus of the first episode of The Chronicles of Professor Jack Baling is what happens to an engineering professor when he encounters a working perpetual motion machine.It's explained by the main scientist character that they get the energy to do this (from nowhere) because in abolishing gravity, the field repeals the law of conservation of energy. Isaac Asimov's short story "The Billiard Ball" (reprinted in Asimov's Mysteries) is about a zero-gravity device which, when the zero-g field is established, the field becomes a brightly-glowing cylinder of hard vacuum - because any air molecules in it lose all proper mass, and thus become incapable of movement at other than the speed of light, so they smash their way out of the field.In Atlas Shrugged, John Galt's engine relies on perpetual motion.One of the plot hinges of Angels & Demons is that the production of antimatter has not only been vastly improved in efficiency, so that large amounts can be made (and stored), but it can now be made at a cost of less energy than will be yielded by annihilating it.and the Clockwork Princess, it's mentioned in passing that one of the minor Sparks with the circus exhibited a perpetual motion machine, and was utterly mortified when Agatha proved that it needed a small push every ten years to keep going. Not to be confused with Eternal Engine, which is a type of Video Game Settings. A Mad Scientist may work on this.Ī subtrope of this: Hyper-Destructive Bouncing Ball. note The required energy is proportional to entropy and temperature, by the way. This involves transferring heat from colder to hotter objects without spending additional energy. No Conservation of Energy applied to machines.Ī perpetual motion machine of the second kind is a machine violating the second law of thermodynamics - that isolated system evolves toward maximum entropy. Obviously, a Perpetual Motion Machine contradicts the First Law of Thermodynamics, which states, roughly, " You can't get something from nothing." Of course, this didn't stop some people from believing in a PMM - they just insist that obviously, the First Law has to be wrong. (A weaker version just keeps moving on and on, without creating new energy you could put in use.) "Free Energy Device" is another name for it. A Perpetual Motion Machine (also Perpetuum Mobile, Latin for "forever moving") is an old dream of mankind: A machine that creates more Energy than it receives from the outside. ![]()
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