What is the recent technology of diamagnetic levitation?
483815
Its thro permanent magnets. The traditional maglev used electro magnets on both track and the car but this uses a permanent magnet and uses electromagnet only for propulsion
244341
Look up the mecahnical univers 43? on magnetic induction.
139375
A horseshoe magnet allows you to concentrate more of the lines of force that eminate from the ends of a magnet through an object.  That translates in to greater sticking power.  \nYou can use a simalar trick with a bar magnet (like they do in hard disk drive magnets and the like) by applying metal to the rare earth magnets to do the same.
756903
Maglev trains are the fastest trains in the world! Maglev is short for magnetic levitation which basic principles involve the use of magnetism to levitate an object. To know how maglev trains stop, you must know how they go.\n\nMagnetism in elementary science simply states that like poles repel and opposites attract. When two magnets of which the same poles are towards each other are brought towards each other, a repulsion force can be felt and likewise a pair of the same poles will attract. Maglev trains use these basic principles to force the train upwards above the track surface. The simple way of visualizing this is to imagine the train repelling away from the track surface.\n\nSo now that we have established the levitation part of it, how does it move in the direction we want it to go? Maglev technology uses the principles of linear induction and magnetism to propel the train forwards or backwards. Now imagine the train is levitated by magnetism upwards as well as forwards. The combination of repulsive and attractive magnetic forces cause the train to move towards a region of track. In the same fashion, to slow down the train while it is moving, we must apply the repulsive and attractive forces in such a way opposite to which the motion started.\n\nThe easiest way is to visualize this. In the diagram below, the lowercase letters represent the track's magnetic poles and the uppercase letters represent the train's magnetic poles.\n\nThe following diagrams below show the side view and top view of the track. The "==" represent the gap between the train and the track in which no contact is actually being made. Note that the side view magnets are not shown in the top view so each diagram represents a different set of magnetic poles which are controlled independently.\n\nMagnetic Levitation (Track Side View):\n\n--N---N---N---N---N---N\n=================\nn---n----n---n----n---n---n\n\n\nMaglev Propulsion (Top Down View):\n\nn---s----n---s----n---s---n\n=================\n--N---S---N---S---N---S   +++>\n=================\nn---s----n---s----n---s---n\n\nNotice how in the above diagram there is a force of attraction to the right. When the train reaches the position whereby the magnetic poles are directly in line with each other, the track switches the north poles (n) to south poles (s) and vice versa. If you continue this process the net force will result in acceleration.\n\nThe braking system is the exact opposite of the above description where the net force is to the left causing the train to slow down.\n\nSince there is no physical contact between the maglev train and the track, the resulting frictional forces due to contact are nonexistent. For this reason the only limiting factor for a maglev train's speed is air friction. If this technology was implemented in a vacuum, there would be nothing holding the train back to stop if from accelerating.\n\nOf course this is the basis and simple principle of maglev and linear induction technology. There are many more complications and factors that must be considered in order to fully understand the entire picture, however this is essentially the how it works.
1151044
http://www.allaboutcircuits.com/vol_6/chpt_7/5.html\nhttp://hyperphysics.phy-astr.gsu.edu/Hbase/electronic/nandlatch.html
416562
Yes, it is a superconductivity experiment.\n\nTry a Yahoo Search for:\nsuperconductivity experiments\nhttp://search.yahoo.com/search?ei=utf-8&fr=slv1-wdgt&p=superconductivity%20experiments\nsuperconductivity experiment levitating magnet\nhttp://search.yahoo.com/search?ei=utf-8&fr=slv1-wdgt&p=superconductivity%20experiment%20levitating%20magnet\n\nBrowsing around, I found this kit:\nhttp://www.wondermagnet.com/superconductor.html\n\nNote that most of these experiments will require liquid nitrogen which requires care and special handling.  Not sure if you can obtain it very easily. You may want to talk to your science teacher about it.
896989
You can make a ball bearing launcher:\nhttp://my.execpc.com/~rhoadley/maglnch.htm\n\nYou can make your own levitating MagLev train:\nhttp://my.execpc.com/~rhoadley/magtrain.htm\n\nOther info is available here:\nhttp://www.kn.sbc.com/wired/fil/pages/listmagnetsan1.html
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.
519034
The hard drive platters are coated with a special coating that contains microscopic, magnetically-sensitive particles.  As the heads move across the spinning hard drive, the tiny particles are put into one of two positions -- a position indicating a "1" (ON) or a position indicating a "0" (OFF).  This all occurs extremely fast, of course.  The microscopic particles retain their position until they are overwritten by the heads, or a magnet is brought into close proximity to the drive platters.  Amazing, huh?
589672
Good answer Azreal! Scientists in Australia have actually transported light matter across the laboratory in the last year though....hey its a start!
1134719
Apparently so, but it is said to be expensive.\n\nThe most effective commercially available magnetic shielding material is called Mumetal, and is an alloy of 5% Copper, 2% Chromium, 77% Nickel, and 16% Iron.
1098861
a copper disc works also, When spinning fast the magnetic field is reflected back and the magnet will float off.
1092387
The closest magnetic source.
1128622
Henry Abraham invented the Astable multivibrator1918. Thats the earliest i can find. Its a monostable multivibrator with capacitor couplings at both ends rather than one. It alows the caircuit to be unstable at both states so it can oscillate from one to the other without stopping. \n\nIts an easier way for implemation of two stae systems
697337
Mostly they use magnetic fields.
401445
please go thru the following pages\n\nhttp://science.howstuffworks.com/maglev-train.htm\nhttp://science.howstuffworks.com/maglev-train1.htm\nhttp://science.howstuffworks.com/maglev-train2.htm\nhttp://science.howstuffworks.com/maglev-train3.htm
191596
Sounds like you're talking about a magnetic levitation train or maglev for short. This is not an easy project and you will likely have to fabricate the magnetic track and induction coils (still do some searching, but I don't know of anyone that carries model sized maglev material). I have included a couple of links for you to get started with. Good luck!