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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Hi all.
Just read a very interesting article in "New Scientist" that neatly explains Conservation of Energy.
It seems that all known principles of physics have a symmetry, and as a result of this *automatically* possess a conservation law in order to remain consistent.
Therefore, the following case (often theorised to be an example of "free" energy)
Take two magnets being brought together with non opposing poles. As they are brought together the magnetic fields interact, generating a force pulling them together. Therefore, to separate them requires expending energy against the magnetic fields so no energy is gained.
However, take the case where a magnetic shield is placed between the magnets just before impact. The effective force drops to zero so in principle an energy gain can be "seen". This is misleading as even with a superconductor, a moving magnetic field will generate energy which has to be expended somehow, heating up the superconductor above Tc after a few cycles.
Theorising a room temperature superconductor, it can be seen that no matter how high the Tc, the heat buildup will eventually result in CoE reasserting itself.
I would theorise that there is no possible case where any device, magnetic or otherwise can generate a net energy gain without energy input in another form. No matter how hard you try to modify the system, sooner or later it runs into a brick wall.
Interestingly, someone recently discovered that superconductors change optical properties when reaching Tc, YBCO seems to do this. So a hypothetical material which can switch between superconducting and insulating when exposed to certain wavelengths of light can be used here.
Obviously, the energy input issue would not make this a "free" energy device, but it might be a step towards a more efficient solar energy harnessing device. In this case there is an external energy input so CoE does not directly apply, but the issues with Tc would.
Registered Member #1025
Joined: Sun Sept 23 2007, 07:53PM
Location: Czech Rep.
Posts: 566
I have one theoretical question in my mind for quite long time and think it can be easily released as a part of this interesting thread. In fact it’s an analogy to much known experiment with a spring which is squeezed, fixed in this state and than dissolved in strong acid. We all know that the energy is not lost but dissipates in the form of heat (you can measure the difference in the temperature of the acid dissolving squeezed and relax spiral.)…
And here is my idea. Just reproduce the experiment but with two magnets pressed together by the opposite polarities and glued by some acid resistant epoxy. Will be the magnetic energy also transferred into the heat after the magnetic material will be dissolved? Most likely, I know, but will be during this change generated any measurable EM pulse(s)? If yes, at what frequency? And, how the transfer of energy will be done?
Registered Member #160
Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938
Another one that I saw yesterday was a magnetic motor where the back EMF was returned up the steel drive shaft to increase the induction motor field, so the motor actually speeds up under load. Sounds far fetched, but is demonstrated simply.
Registered Member #27
Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
1. Don't use the chatting board as a crutch. If your thread involves the topics covered by the more specific boards on the forum, don't post it in the chatting board to avoid having to follow certain rules.
2. Free energy, electrogravitics, and all other types of pseudoscience are not allowed on any part of this site, nor are links to sites that deal primarily with these subjects.
The editor of "New Scientist" defines it as "an ideas magazine" meaning that they will print free fantasy if they think it will sell more magazines. So don't believe everything you read there (just some general information, not directly related to this thread).
I would have moved this thread to the General Science and Electronics forum where it belongs but it has taken an ugly turn to the point that people will get permanently banned if it continues, so I am closing it.
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Conservation of energy explained?
