| Author | Message | ||
     Mikey |
Hello: Is there anything that can block magnetism? I don't mean repel it like something diamagnetic, but actually block it. Thank You and great site! | ||
| Simon Quellen Field (Sfield) |
I have answered this many times. People seem to think that if only they could block a magnetic field, they could build a perpetual motion device, or get free energy. Both of those things are not possible. If there were such a thing as free energy, we would be in a lot of trouble, as that energy would eventually end up as heat. But that is not why it is impossible. Read about the laws of thermodynamics. You can block a magnetic field using a piece of steel. The field goes from the north pole to the south pole through the easiest path. Steel is a much easier path than air. Read about magnetic permeability. We say that the field goes through the steel because that lowers the energy, just as a brick falls to earth lowers the potential energy of the brick. Like the brick's attraction to the earth, the steel's attraction to the magnet lowers the energy relative to the steel being farther from the magnet. You can store some of the energy that is lost as the steel approaches the magnet by attaching a rubber band to the steel. The energy is stored in the stretched rubber. You can then use some of that energy to help you move the steel away from the magnet, a task that would otherwise require substantial effort. However, you cannot store all of the energy, nor can you get all of it back. Some is lost in heating up the rubber band. Some is lost in moving air out of the way. Therefore, to move the steel towards and away from the magnet, we must expend energy. The steel prevents the magnetic field from being experienced beyond the steel, but in order to bring the magnetism back, we must do work to move the steel back out of the way. I never get people asking me if there is a material that can block gravity. But somehow people think that a magnetic field is different from a gravitational field in that way. It is not. Magnetism and gravity are fields, not beams of light that can be blocked by waving a hand. Unlike gravity, there are materials that are more and less permeable to a magnetic field. But highly permeable materials like iron and steel only redirect the field, and doing in doing so they can store and release energy, but they cannot create it. | ||
| davidy Unregistered guest |
I was having a problem where metallic dust particles are attracted to a spinning aluminum disk. I am trying to solve this problem by applying a material to the aluminum, such as graphite to somehow repel the dust? Does anyone have any ides for altering the aluminum's magnetic field to repel the dust from accumulating? | ||
| Google hating inventer Unregistered guest Posted From: 24.171.74.163 |
Simon you are wrong, have you ever herd of E=MC2? That energy as heat will turn into mater, so it will not destroy the earth it will build upon the earth. Simon think outside the box. -The Google hating inventer | ||
| Travis Babcock (Travis) Junior Member Username: Travis Post Number: 8 Registered: 5-2005 |
davidy: If the problem is magnetics, then one solution i can think of is to use a bismuth disk, since bismuth will repel magnetic force. | ||
| Simon Quellen Field (Sfield) Senior Member Username: Sfield Post Number: 603 Registered: 12-2004 |
Since aluminum is not magnetic, it is highly unlikely that the dust is being magnetically attracted to the disk. Since the aluminum is also a good conductor, it seems unlikely that the dust is being attracted electrostatically. You might try blowing compressed air at the disk. | ||
| scott murdock (Unregistered Guest) Unregistered guest Posted From: 71.240.17.103 |
just a comment pertaining to free energy! I believe there are vast amounts of free flowing energy (free to us) that needs only to be harnest. So to all the sceptics that demoralize free energy seekers, open your mind and not a book. Scott from PA. Golf cady! | ||
| scott (Ichyc) Senior Member Username: Ichyc Post Number: 172 Registered: 6-2006 |
It's weird that you put this here, but I believe this is very much so true also. I think that it is weird that people want to create free energy or make a perpetual motion device when they could just buy a nice sized solar array and power there house.also get payed buy the local electricity company if you want. | ||
| Simon Quellen Field (Sfield) Senior Member Username: Sfield Post Number: 1771 Registered: 12-2004 |
Mr. Murdock: You may also believe in the Easter Bunny. That doesn't mean you will always have free eggs hidden on your lawn. There are vast amounts of energy flowing around us. Sunlight, for example. And harnessing it is not difficult, it is just that harnessing it from fossil fuels is currently cheaper. But the people who believe in free energy are not talking about all the free energy in sunlight. They are more like people who believe in ghosts, angels, fairies, Santa Claus, and other things that are not possible to prove. No one has shown any free energy device that works, nor has anyone sold any energy from such a device and gotten rich. They keep rubbing the lamp, because reading the books is too difficult for them. Google hater: Hating a tool is silly. So is thinking that heat will spontaneously turn into matter and solve the global warming problem. And so is refusing to use a spell checker when you so desperately need one. You can think outside any box you wish, but until you can actually demonstrate something, you'll find it hard to convince people who see that the thoughts in the box are what our technology is made of, and the ones outside that box aren't working. | ||
| Michael (Michaelt) Senior Member Username: Michaelt Post Number: 171 Registered: 12-2005 |
[quote] Simon you are wrong, have you ever herd (sic) of E=MC2? That energy as heat will turn into mater (sic), so it will not destroy the earth it will build upon the earth. Simon think outside the box. [/quote] Were that to REALLY happen, how would that also not destroy the earth? It would destroy it at least to our own perspective. Imagine a cement mixer filling a convertible with cement. Yes, perhaps by adding a ton of unwanted material to the vehicle it "builds upon it", but how useful is that? Is a car full of, and covered with, cement more valuable to a driver than an operable car? "Think outside the box" is not supposed to mean "think of the most ridiculous crap you can come up with and try to pass it off as insight." | ||
| Dave Rigby (Riggers100) New member Username: Riggers100 Post Number: 1 Registered: 5-2008 |
Doesn't all this depend on what you mean by free energy? for example, a solar cell produces power from sun light for free, but you still have to pay for the solar cell and it needs the right conditions to work, cloudy days are not good. Our knowledge of the universe is based on what scientist theorise, very clever and informed theories they may be, but how often have scientist been proved wrong in the past when a theory collapses due to a new discovery, something that we didn't even know existed until someone stumbled across it. The laws of thermodynamics, incidentally written by men, not nature may one day be proved inaccurate. There may be some source of energy floating around the universe far more powerful than sunlight that we just don't know about yet because we are unable to detect it, who knows. If someone comes up with a free energy device that seems to work, maybe it isn't breaking the laws of thermodynamics, its just tapping an unknown source that we just haven't come across before. Yes, there are a lot of maybe's in this, but my point is that none of us are qualified to speak about things we just don't know exist or don't exist. This is where keeping an open mind and 'thinking outside the box' comes in. | ||
| Kasper Emil Feld (Magnetfeld) Advanced Member Username: Magnetfeld Post Number: 81 Registered: 11-2007 |
We ARE trying to find new energy sources We ARE trying to think outside the box We ARE trying to further our knowledge of the universe and discover new things But if people are so convinced playing with magnets will give them free energy just because magnets are strange to play with, why don't the think that jumping of a roof will enable you to fly, or that running repeatedly against a wall will make them tunnel through it, or wearing tin foil hats will boost your brain power? Whats so special about magnets? It is good to have an open mind. But don't let it be so open that your brain falls out. | ||
| Open Thinker. (Unregistered Guest) Unregistered guest Posted From: 92.21.90.0 |
Dave Rigby has the situation correctly summed up. Anyone who thinks otherwise should take three simple steps: 1) Spend 5 seconds re-visiting 'They used to think the world was flat' argument. 2) Say out loud "I'm a flat worlder" 3) Stay quiet after that... you sound silly. Open Thinker. | ||
| Martin (Unregistered Guest) Unregistered guest Posted From: 88.131.2.67 |
Simon Quellen Field is completly right. No scientist ever said the earth was flat, those ideas inherit from old religion and superstition; the will to explain what one does not understand. I do not call the people making those theories up scientists. The theories were unproved and when we discovered the truth about the earth being a sphere, they were discarded. Since there are numerous proofs of the laws of energy, I find it very unlikly that someone suddenly would find a way to discard all that proof. Besides, if we can use what we currently discovered, it doesn't really matter if it is correct or not, it is still useful. One example - the world being though of as flat - does not make a rule. The globally accepted laws of energies and physics won't just be "proven wrong" suddenly. Martin, Sweden |
