Answer asked: If we lived in a world where we did not have gravity, magnets, the sun or wind (etc.) then I could see saying that a free energy device could not work. But with these FREE elements, why do we insist that it cannot be done? In other words, why is it that we accept
solar power, but not gravity-powered, or magnet-powered energy, that is perpetual? It does NOT breat the second law of Thermodyamics because it IS powered by an outside source — namely the magnets or gravity. I’m convinced it can be done, and have even seen it done on small scale.
Any physicists want to comment?
Me
wind energy
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I am not a physicist, but I know that nothing is free.
I am speaking metaphysically, metaphorically and realistically.
In order to get SOMETHING, something else has to be used or expended. We might call solar energy ‘free’ but it is at the cost of a dying sun. Granted, we will not see the death in our time, and we tend ro consider our eco-system a closed environment.
TFTP
wind energy
First you must understand the difference between potential energy and kinetic energy. Take for example a weight that you place at some height. It took you energy to place it at that height. The energy you can get from dropping that weight will be at equal to or less than the energy required to lift it to that height.
However hydroelectric power is getting energy from gravity. It is the environment that lifts that water to a height by evaporation and then rain.
No matter what you do to get gravity energy out of something, you (or something else) had to put energy into before hand.
Magnets are the same thing. Two magnets may more toward each other and you can get kinetic energy from them, but to pull them apart again will required energy.
If you are going to use the second law of thermo, I prefer the more general version that I learned in grad school: ” In any thermodynamic process the entropy of the universe will increase or remain constant.” When thinking about such problems, you should not be thinking of an outside source. Consider the entire universe as your system.
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Magnets do no work. You can’t get energy out of them for free. Same for gravity. It’s gravitational potential – as you reduce your potential energy above the Earth, your kinetic increases at the same rate – you’re not gaining any energy in a gravitational field.
Solar power isn’t ‘free’ energy in the physical sense – sure, you don’t have to pay for it, but the Sun is still doing the work to produce it. ‘Free energy’ in the physical sense is getting energy from nothing, like ‘vacuum energy’ or something – getting energy out of a system but not using up materials in the process.
Solar energy is not perpetual – the Sun is burning hydrogen to make it, and it won’t last forever, just another 5 billion years or so. There are no magnet-powered perpetual motion machines that work, nor gravity powered.
If you want to demonstrate your magnet/gravity powered machines, go ahead – but check up on ‘perpetual’ motion machines first; there are hundreds of varieties people have tried to make on the same ideas. Bottom line – you can’t get energy out of a gravitational field, or a magnetic one.
But build one and see for yourself. If it works, take it to a local university and ask a physicist to look at it for you.