Is a machine physically possible that has an efficiency greater than 100%?Discuss?

Answer 1

Only perpetual motion machine can create 100% efficiency. But a machine like that is not possible.

because

A perpetual motion machine of the first kind produces strictly more energy than it uses, thus violating the law of conservation of energy.

A machine that produces (in still-usable form) exactly as much energy as it uses is a perpetual motion machine of the second kind, which continues running forever (not necessarily doing any usable work) by converting its waste heat back into mechanical work. This need not violate the law of conservation of energy, but it does violate the less fundamental second law of thermodynamics (see also entropy). More generally, any device that converts heat into work without loss can be considered a perpetual motion machine of the second kind, since it could be used to make something that moves perpetually.

By minimizing friction and other causes of dissipation, it is possible to produce a good approximation to a perpetual motion machine of the second (or third) kind. Planetary systems (such as the earth and moon) could be considered an example. Planets, moons, and stars spin without any fuel, batteries, muscle, cost, or other limited power. Planets don't rotate forever, however; energy in such systems is dissipated via tidal forces, by friction with the dust and gas in space, and perhaps also very slowly via gravitational waves.

In an otherwise completely empty Newtonian universe, a single particle could travel forever at constant velocity with no violation of the laws of physics – though of course no energy could be extracted from it without slowing it down. For example, an electron can spin around a nucleus in an atom of matter indefinitely unless it or the atom is disrupted in some way.

Answer 2

No. % means per cent. There is only 100 possible. Besides, if a machine put out more energy than it took in, the energy would have to be "created." We all know that can't happen.

Answer 3

Interestingly with a heat pump one can put in 1 kW of electrical energy (the compressor) and get out 3 kW of heat energy (from the condenser). It is not really 300% efficient though as the evaporator takes in heat (albeit free heat from a cold source).

Answer 4

go and look up the "laws of thermodynamics". google that phrase and read all about it.

In short you cannot have a machine that runs at 100% efficiency.
Entropy will make sure of that.

tom

Answer 5

No way no the actiual best is 84%

Answer 6

no... i not PHYSICALLY....just THEORETICALLY :)