Perpetual power. Why can't you take a gas engine driven electric generator, use the generator to power an electric motor. Use that same electric motor drive the generator to power that electric motor. I know there is a reason/principle, but I can't remember it.
2007-06-15 15:20:14 · 11 answers · asked by mmrvl 1 in Science & Mathematics ➔ Engineering
You could but each time energy is transfered some of it is lost. Thus you have less than 100% efficientcy.
2007-06-15 15:26:15 · answer #1 · answered by Jake in Indiana 5 · 1⤊ 0⤋
Yes. Hopefully, though, your science lab is too sophisticated to have a simple bar magnet, some wire, and a fan blade. Mount the fan blade on an axle of some sort: pencil, broom handle, etc. Mount the axle on some sort of support so it can turn freely. Mount the magnet on the axle at a right angle. Place a coil of wire a millimeter or so away from the path of the magnet's poles. As the wind turns the fan, it'll turn the the north and south poles of the magnet past the coil, creating a voltage. Use this voltage to turn a small motor. You might need a diode or bridge rectifier (found in the electronics lab, not the science lab) to convert AC to DC for a small DC motor such as is found in many toys.
2016-05-17 04:38:16 · answer #2 · answered by ? 3 · 0⤊ 0⤋
Well, first of all, even if that did work, you couldn't get any work out of it. All the energy of the motor would be going to the generator. All the generator's power to the motor. But, that is assuming no losses. There are, however, losses. The wires that would carry the power are not 100% efficient and so they lose some of the energy as heat. Also, the generator and the motor are not 100% efficient either. Therefore, there is energy lost at each stage.
2007-06-15 15:27:23 · answer #3 · answered by newfaldon 4 · 2⤊ 0⤋
The principle(s) involved are the Laws of Thermodynamics. In layman's terms, the first law says 'you can't get energy for nothing.' The second law says 'you can't transfer energy without losses.' The third law says 'you lose a lot of energy with every transformation.'
The numbers... the gas generator gets maybe 20-40% of the chemical energy out of the gasoline to mechanical work. The turning shaft loses energy, as do the wires and the generator.
It's exactly the same as why water can't flow in a circle. You need a pump- external power- to make that happen.
2007-06-15 15:52:50 · answer #4 · answered by DT3238 4 · 1⤊ 0⤋
The reasons for not being able to have a perpetual motion device are the three laws of motion that newton discovered.
Newton's First Law of Motion:
I. Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
Newton's Second Law of Motion:
II. The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector.
Newton's Third Law of Motion:
III. For every action there is an equal and opposite reaction.
2007-06-19 02:34:31 · answer #5 · answered by Matt3471 3 · 0⤊ 0⤋
friction.
friction causes resistance and heat is the energy escaping
there is a company call sky jack that has battery driven lifts. on the non-driving wheel it has a generator. as you drive the lift around the one wheel pulls it and another turns the generator causing the battery to last longer.
2007-06-15 15:30:55 · answer #6 · answered by specal k 5 · 0⤊ 0⤋
Simply put? Nature is never 100% efficient. Energy bleeds with each transfer from one form of potential to another.
2007-06-15 23:43:30 · answer #7 · answered by audiotecnicality 2 · 0⤊ 0⤋
THERE IS NO FREE LUNCH!
Which means you can't get something out of nothing. The principle you are refering to is called conservation of energy.
2007-06-15 18:57:21 · answer #8 · answered by kennyk 4 · 0⤊ 0⤋
What you propose sounds like it should make sense, doesn't it? well now comes the part you were not ready for,,, Theres a question burning inside of you, you have felt it all your life, you know that somehow things just aren't right,, unfortunately no one can tell you, you have to see it for yourself.
Your insights are brilliant, but keep thinking like that and posting it here in the Matrix and agents are sure to come for you :) take care......
2007-06-15 15:31:34 · answer #9 · answered by Daddy in a box :) 3 · 0⤊ 2⤋
Oh it can but every time you convert from one form of motion to another, you waste power
2007-06-15 15:51:30 · answer #10 · answered by Gene 7 · 0⤊ 0⤋