Can permanent magnets be used to levitate another magnet (and be stable) while at room temperature?
86061
Flipping over wouldn't be a problem; the asker is building a magnetic monopole on the ping-pong ball.  \nIs this possible?  Check the ref.website and find "Monopole Attempt".  They say that the other pole would leak out through the spaces between the magnets.  \nSomewhere I heard there's only room for one monopole in the universe.  \nWould the first person to do it be a monopolist?
76877
You might be able to make a PM machine based on a vaporizing and recondensing fluid, which is what I'm guessing you're getting at. PM, that is, as long as the necessary temperature differences continue to exist. You would need to vaporize at a low point and condense at a high point, with wheel motion bringing the heavier containers of condensed fluid down to a warmer location for vaporization. It doesn't violate any thermodynamic laws since it takes heat input and exhausts cooler output, just like the water-bobbing woodpecker does. Do it!
1161988
No.\n\nBut it can when it is heated.\n\nIf you heat a magnetic material above its Curie temperature, it depolarises and stops being magnetic.
357714
Some types of metal and other magnets.
612302
You could build a set of fluid armor as seen in the Matrix movie.\n\nA simple magnetorheological fluid can be home-made out of small magnetic particles mixed with mineral or vegetable oil. Iron filings do not work well; they are too big. Good sources for small magnetic particles are:\n\n* magnetic inspection powder from welding shops\n* particles from burned steel wool (after mortar and pestle)\n* particles scraped from the surface of video tapes\n* particles "mined" from sand with a plastic bag and a magnet (see external links)\n\nThese fluids are not very stable, however. The particles will tend to clump and the fluid properties will be lost quickly. Fluids created for professional purposes use emulsifiers to suspend very small oily (octane or kerosene) magnetic particles in water. The particles are very fine; less than a micrometre in diameter.
1169133
You'd have to have a magnet below the ground wouldnt you? I mean if you are saying the possible, then streets could have magnets below.That is-to hover. \nTo not hover the magnets would have to be there but opposing polarity and your other magnets would have to be enough to overcome the strength of THAT polarity.(And since I know little about ALL of what you're saying, wouldnt you have to have a capacitator in there somewhere to store the electricity that the auto generated?)\n\nBut I believe this is how David Copperfield "flies". He has some kind of magnet on him-large enough or something magnetized long enough-and an electromagnet in/on the ceiling of the auditorium. Then the electromagnet is turned on and voltage is controlled to raise and lower him but it moves and he follows.\nThe same with that street magician (Blaine?)-we dont see it, but is he stepping on a manhole cover with a magnet placed under?Do his shoes have magnets in the soles so that when he steps on the cover the two magnets repel so that it appears he is levitating? And he also spreads his arms apart or brings them closer-closing and opening a circuit, raising and lowing self?\n\nSo I believe if you can work the bugs out, streets can be paved with magnets powerful enough below ground but with enough insulation to not attract the small stuff.\n\nI just like your question. I know nothing about such things.
426889
Antigravity, but that hasn't been proven.  Magnetism works when you have two magneticaly charged objects.
1076485
i dont know much about physics but i did a search and this is what i got hope it has what you're looking for:\n\nhttp://science.electronicsinfoline.com/Physics/Electricity_and_Magnetism/
1123749
Hey there:\n\nInteresting question, because a month ago, i stumbled upon a thrown away harddrive while walking my dog.  I desembled it while I was at home, and found inside it TWO EXTREMELY POWERFULL RARE EARTH MAGNETS.  Also, around on each side of these magnets, was a magnetic shield, that did not allow them to attract from one side, but yes from the other.  If I was you, look for any thrown away harddrive, they all have them, and you will also be getting an extremly powerfull magnet while you are at it.
84144
You need to define "effect".  It also depends on the strength of the magnet, but if you're talking about something like a fridge magnet or something like that it's a very small fraction of an inch before the effect is negligible.
1029513
has to be metal, preferably in several sheets not touching each other. Wood and plastic do not stop magnetic field.\n\nThick piece of lead would definitely work, and is completely safe (as long as you do not drop it on your foot and wash your hands afterwards)
210510
No, because you might have other forces acting on the object such as magnetic force and gravity.
421318
Yes, but you would need a lot of magnets and a good knowledge of electricity. GOOD LUCK!
979029
It is not really of great practical use because it only occurs with superconductors, most effectively with type 1 supercondustors which have to be cooled to around -265 Centigrade. This is not very practical. The Meissner effect is also quenched by large magnetic fields.
414734
bring the magnets close to each other. If u feel any repulsion, that means u have tried joining opposite poles.\nWith this test u just come to know of the repulsive and attractive sides relative to a magnet. No qualitative nalysis of which is North pole and which is south cannot be done! But hey! If the bar magnet is painted red on one side, then that would be the north pole!
1001462
Magnets have no effect on your body whatsoever.  But feel free to fool yourself into thinking they'll do something anyway.  Science doesn't have the answers, turn to pseudoscience.
268419
Methods\n\n\nDiamagnetism\n\nA substance which is diamagnetic repels a magnetic field. Earnshaw's theorem does not apply to diamagnets since they behave in the opposite manner of a typical magnet (relative permeability μr < 1). All materials have diamagnetic properties, but the effect is very weak, and usually overcome by the object's paramagnetic or ferromagnetic properties. A material which is predominantly diamagnetic will be repelled by a magnet, although typical objects only feel a very small force. This can be used to levitate light pieces of pyrolytic graphite or bismuth above a moderately strong permanent magnet. As water is predominantly diamagnetic, this property has been used to levitate water droplets and even live animals, such as a grasshopper and a frog. The magnetic fields required for this are very high, however; in the range of 16 teslas, and create significant problems if ferromagnetic materials are nearby.\n\n\n\n\nSuperconductivity\n\nDue to the Meissner effect, a superconductor also expels magnetic fields (μr = 0), much better than a diamagnet. Due to this (and flux pinning) the magnet is held at a fixed distance from the superconductor or vice versa. This is the principle in place behind EDS (electrodynamic suspension) magnetic levitation trains.\n\n\nFeedback control systems\n\nIf the position and trajectory of the object to be levitated can be measured, the field of nearby electromagnets (or even the position of permanent magnets) can be continuously adjusted via feedback control systems to keep the levitated object in the desired position.\n\nThis is the principle in place behind common tabletop levitation demonstrations, which use a beam of light to measure the position of an object. The electromagnet (arranged to pull the ferromagnetic object upwards) is turned off whenever the beam of light is broken by the object, and turned back on when it falls beyond the beam. This is a very simple example, and not very robust. Much more complicated and effective measurement, magnetic, and control systems are possible.\n\nThis is also the principle upon which EMS (electromagnetic suspension) magnetic levitation trains are based. The train wraps around the track, and is pulled upwards from below.\n\n\nOscillating fields\n\nA conductor can be levitated above an electromagnet with a high frequency alternating current flowing through it. This causes any regular conductor to behave like a diamagnet, due to the eddy currents generated in the conductor. Since the eddy currents create their own fields which oppose the magnetic field, the conductive object is repelled from the electromagnet.\n\nThis effect requires high frequencies and non-ferromagnetic conductive materials like aluminium or copper, as the ferromagnetic ones are attracted to the electromagnet.\n\n\nHalbach arrays\n\nAnother way of stabilizing the repulsive effect is to use fields that move in space, rather than just time. This effect can be demonstrated with a rotating conductive disc and a permanent magnet, which will repel each other.\n\nThis is the principle of the Inductrack maglev train system, which avoids the problems inherent in both the EMS and EDS systems. It uses only permanent magnets (in a Halbach array) and unpowered conductors to provide levitation. The only restriction is that the train must already be moving at a few kilometers per hour (about human walking speed) to levitate. The energy for suspension comes entirely from forward motion, efficiency is good, and no extremely low temperature suspension magnets are required.\n\nHalbach arrays are also well-suited to magnetic levitation of gyroscope, motor and generator spindles.\n\n\nGyroscopic motion\n\nThe reason a permanent magnet suspended above another magnet is unstable is because the levitated magnet will easily overturn and the force will become attractive. If the levitated magnet is rotated, the gyroscopic forces from spinning and precession can prevent the magnet fro