2007-01-24 15:38:31 · 5 answers · asked by ? 2 in Science & Mathematics ➔ Other - Science
because some energy is lost to friction, gravity, air resistance, stuff like that. Energy can't be produced, only transferred, So the energy that goes into the machine is the same that comes out only a little less each time because of friction and eventually the energy is all lost to friction.
2007-01-24 15:46:16 · answer #1 · answered by Anonymous · 1⤊ 1⤋
Law of Conservation of Energy or the First law of Thermodynamics: The increase in the internal energy of a thermodynamic system is equal to the amount of heat energy added to the system minus the work done by the system on the surroundings.
2007-01-24 15:45:25 · answer #2 · answered by crimsonsky_bleedingheart 3 · 0⤊ 0⤋
There's no free lunch. Conservation of energy principles say so, and they have held true for ages. The energy in = energy out, and there is always energy lost to heat/friction so the energy in has to be greater to or equal the energy out.
2007-01-24 15:43:01 · answer #3 · answered by treseuropean 6 · 0⤊ 0⤋
Gain = output / input
G is not 100% or 1.It is always less than 1.
2007-01-24 17:31:24 · answer #4 · answered by Anonymous · 0⤊ 0⤋
It is not possible to create or destroy matter or energy. We can only change it's form.
2007-01-24 15:44:03 · answer #5 · answered by Rago715 3 · 1⤊ 0⤋