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There are two reasons it's not a good example of a perpetual motion machine. It's not perpetual and it draws on the environment. How many reasons do you need? Again I think you need to take the post in context, since I addressed the environmental source also:
Mary Rose
But the issue here has been the fact that the clock draws on the environment, no? As in accusations of dictionary abuse?
A non-naive interpretation recognizes the quotes around "free" in the term "free energy" are my attempt to avoid dictionary abuse, by indicating it's not really free, and not really free energy. And by saying "seems to" give us something for nothing the obvious implication is, it really doesn't (At least it was supposed to be obvious, especially if you read the whole post in context, but maybe it wasn't to some people).
The atmos clock seems to give us something for nothing. Likewise we can get "free" energy from waves and tides, from wind, solar power, etc, but the sun is the ultimate source for most of that, except perhaps tidal power which comes from gravitational/rotational inertia, so that's a bit risky if we overdo that source and slow down the Earth's rotation.
Arbitrageur
There are two reasons it's not a good example of a perpetual motion machine.
Arbitrageur
A non-naive interpretation recognizes the quotes around "free" in the term "free energy" are my attempt to avoid dictionary abuse, by indicating it's not really free, and not really free energy.
Textbecause the definition involves more than that).
Mary Rose
The term is useless for anyone seeking to describe devices which tap the environment. End of discussion as far as I'm concerned.
Mary Rose
Here is what I don't understand. Why is there an objection to the term "free energy" when the context of the term is that free means no substance traditionally used as fuel is required to run the device?
James1982
You see "free energy" you think "energy I get for free, I don't pay a bill, replace batteries, etc" A person knowledgeable in the subject would see "free energy" and think of energy without a source.
James1982
If you tapped zero point energy, that would be awesome, but that wouldn't be perpetual motion. I don't know why you want to badly to attach that wording to such concepts, as it isn't needed any only distracts from the point.
James1982
Energy exists all around us in different forms, and figuring out different ways of extracting that energy has been a goal for a long time.
James1982
But that energy you get out already existed, you are just being clever in extracting it.
In some cases nearly so, but not quite. For example in 5 billion years, the outer edge of the sun will be 93 million miles from where it is now. And guess how far the Earth is from the sun now? About 93 million miles. Certainly the orbits of Mercury and Venus are not perpetual, as they will likely no longer exist in 5 billion years, at which time the remnants of them will be inside the sun.
ken10
Yes it does involve more....In the universe everything is in a state of perpetual motion, in its true literal sense.
even if the Earth survives the sun's expansion, it will continue to slow down its rotation from the 8 hour days Earth used to have, to longer than 24 hour days in the future. Humans could even accelerate the rate at which the Earth's rotation slows down if we extract enough tidal energy.
Once spun up, objects in the vacuum of space—stars, black holes, planets, moons, spin-stabilized satellites, etc.—continue spinning almost indefinitely with no further energy input. Tides on Earth are dissipating the gravitational energy of the Moon/Earth system at an average rate of about 3.75 terawatts.
GetHyped
reply to post by Mary Rose
The clock in your OP is powered by atmospheric pressure, not zero point energy.
Mary Rose
GetHyped
reply to post by Mary Rose
The clock in your OP is powered by atmospheric pressure, not zero point energy.
You're suggesting that if the clock were powered by zero point energy, it would be a perpetual motion machine?
And if so, why the distinction?
Bedlam
If you were running the thing from magnets, springs, or orgone, then it's a perpetual motion machine.
Mary Rose
Bedlam
If you were running the thing from magnets, springs, or orgone, then it's a perpetual motion machine.
The distinction is that the magnets, springs, or orgone would all be located inside the clock and the energy would simply be recycled indefinitely?
Mary Rose
reply to post by Bedlam
If they are not sources of energy, what were you saying then? How in the world would they produce the perpetual motion?
Are you making a distinction between power and energy?edit on 11/16/13 by Mary Rose because: Add
Please learn the difference between the metric expansion of space, and motion through space.
ken10
All well and good, until you realise this....Even if all the heavenly bodies crashed into each other to form one super mass, because the universe is expanding with no observable entropy, that will mean, that mass will be forever moving with no other forces to effect it.
Game set and match.
Because this expansion is caused by changes in the distance-defining metric, and not by objects themselves moving in space, this expansion (and the resultant movement apart of objects) is not restricted by the speed of light upper bound of special relativity.
Arbitrageur
The fact that they are not the same thing is the reason why a distant galaxy can recede from us faster than the speed of light, because it's not moving through space.
Mary Rose
reply to post by Bedlam
Off the top of your head, could you please list the other sources of energy besides fusion.