OK got a science question about magnets????
539149
A bit rusty, but here it goes - I beleive they subtract fro m the net magnetization. If some of the ions are anti-aligned it is called ferrimagnetic. If the ions anti-align completely it is called antiferrmagnetic.
139513
Metals are attracted to magnets due to unbonded electron pairs that can be easily influenced by a magnetic field.\nFerrous metals (refering to Iron) can be easily influenced by a magnetic field, making them very magnetic.
131722
OK, so it's a little confusing to me, but apparently the magnetic pole close to the north pole is actually a south magnetic pole.  So for some strange reason, the north pole of a magnet bar will be attracted to the south magnetic pole which is located near the north pole.\n\nNorth poles on a magnet are very easily found.  When you bring a magnet up to a coil, and move the north pole back and forth, you will get a current flow in a particular direction (counter clockwise).  \n\nIf you wish you can create your own magnet.  This way you can decide which end is north, and see which end points north.  You need to pass current in a counter clockwise motion.  Use your right hand and make a thumbs up sign.  Your fingers are pointing in the direction of the current, and your thumb is pointed in the direction of the north field.\n\nBest way is to take a wire and wrap it around a bolt at least 10 times.  Current leaves a battery on the positive terminal and enters the battery on the negative terminal.  Make sure you keep track of the direction of current flow.  Then use the right hand rule I indicated above.  The thumb shows the direction of the north magnetic pole.  I wish I could draw you a diagram.
1084812
Iron is usually attracted to a magnet. If a bar of iron is magnetized, One end of the bar will attract one pole of the magnet, and repel the other pole of the magnet. \nCopper, nickel, and zinc are not magnetic. They neither attract or repel a magnet, and they cannot be magnetized.
632980
Let L = 6cm and 2l be equal to 5cm (exaggerated to understand the concept alone; not in real)\n\nWhen the magnet is halved L becomes 3cm and 2l becomes 2.5 cm for each magnet.\n \n2.5cm is less than 3cm.\n\n Now what is your doubt? \n\nIf your doubt is why 2l is less than L, the geometric length?, the answer is, \n\n“The poles of the magnet are not actually present at the ends of the magnet; they are little inside the end faces of the magnet.”\n\nWhen you cut the magnet again in the cut piece the poles are little inside the faces of this cut magnet.
920496
One theory of why a material, capable of being magnetised, becomes magnetic (i.e., attracts ferrous material), is that the individual, but randomly distributed 'domains' within are lined up (by some exterior force - e.g., magnetic field from a coil,  'stroking' with an already magnetised piece of iron/streel, etc.), so that the domains line up. The summation of their individual magnetic fields effectively produces one large magnetic field in  the material and makes what we call a magnet!   Some materials, after this process, retain their magnetism and are called permanent magnets, others, such as relay cores, once the external force is removed, exhibit very little residual magnetism.
856083
Why do magnets work? \nMagnetism is an invisible force felt within the space around a magnet.  This space, called the magnetic field, can either attract (pull) or repel (push away) other magnets and some types of metal.\n\nAll magnets have two ends (poles).  These poles are opposites and are called the north and south poles.  Opposite poles attract, while like (similar) poles, repel.\n\nThe Earth’s core has its own magnetic field.  Magnetic north and south are near the geographic north and south poles.\n\nNASA has been experimenting with magnetic fluids for over 30 years. Magnetic fluids were made to help put fuel into a rocket engine. NASA was trying to solve the problem. of how to move fuel without gravity.  Tiny pieces of iron were put into the fuel. A magnet pulls the iron and could help get the fuel into the engine.\n\nMagnetic fluids are made by mixing pieces of metal in liquids to make a fluid that is very different from other liquids. It will stick to a magnet and can be directed by magnetic forces. Magnetic fields can shape the fluid, and magnetic fluids can change their thickness. They become hard around magnets.\n\nScientists have tried to use magnetic fluids to solve other problems. They’re used to make better computers. Scientists are still thinking of new ways to use the fluids.\n\nYou may use magnetic fluids!  Some cars have them in their shock absorbers. They are used in some buildings and bridges. The fluids help protect structures from damage from earthquakes or strong winds. There is still a lot to learn about these magnetic fluids. NASA is using the Space Station to learn more about them. They hope to find new ways to use them. \n\nKSNN thanks NASAexplores as a source of information. For more information about this topic and additional teaching resources go to http://www.nasaexplores.com
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.
253070
Around any magnet there is a magnetic field.  The magnetic lines of force start from North Pole of a magnet and go around the magnet and ends in the South Pole.\n\nIf any isolated unit North Pole placed in that field will go round the magnet along a line of force in the direction of North Pole to South Pole and reach the South Pole.\n\nA unit South Pole will move in opposite direction.\n\nTherefore if another magnet is placed near it, its north pole tend to go along the line of force i.e. from North Pole to South Pole whereas the South Pole moves toward the North Pole on the opposite direction. \nThis is the mechanism of repulsion.
789773
let us understand it in a simple way:\n   Suppose you have a magnet as shown below:\n                                [ N ]\n                                [ S ]\n\nBy cutting the magnet centrally, if you  mean cutting it vertically, then we would obtain the following configuration after cutting the magnet:\n                              [N] [N]\n                              [S] [S]\nThat is to say we have resulted in two magnets with polarities as shown above.Now as we all know that like polarities(N-N, S-S) repel and unlike polarities(N-S,S-N) attract, the result follows that the two magnet in above configuration repel each other while they attract when one of them is rotated by 180.\n[When one of the magnet is  rotated (say the second one) the following configuration results:\n                            [N] [S]\n                            [S] [N]\nand hence the result.]
1054406
And just how do you propose I put a diagram on Y!A?\n\nNonetheless, electricity can be used to generate electricity, as mentioned.  Put three magnets around a rotating shaft & you get 3Φ electricity.\n\nMagnets work in compasses to help a person find direction.\n\nMagnets can be used to hold cabinet doors closed.\n\nMagnets can be used to lift things (like in a junkyard to move vehicles to a compactor), or to remotely move magnetic items (like if you can't reach your car keys, you could retrieve them with a strong enough magnet).
907372
A magnet whose magnetic properties is dependent on current flow.
101591
See if it is attracted to a magnet?
145168
Actually the shape of a magnet doesn't affect to the its strengh because strengh of a magnet is more powerful than  its shape.
1009498
Dont know much but plz try this\n\nhttp://www.google.co.uk/search?hl=en&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=magnetic+particle+testing+the+testing+particles&spell=1
139636
Electromagnets are made out of metal that can easily be magnetized by applying DC voltage. Electromagnets do not occur naturally in nature but are manmade. Their magnetism can be turned on and off.\n\nPermanent magnets occur naturally in nature.
268504
I'm not sure anyone really "know" but there are many teltail clues.  Not all materials are magnetic except perhaps under very powerful magnetic fluxes (MRI's?) but all atoms of materials do have one or more electrons orbiting their nuclii.  We know that electrons can be directed by magnetic flux, perhaps in a TV picture tube, etc.  Therefore, the number and arrangements of electrons of the atoms differ and some create magnetic properties (dipoles or two different poles).  If an iron bar is heated to a high temperature all the iron atoms in the bar are permitted to spin around willy-nilly.  If the bar is then cooled while exposed to a strong magnetic flux (electromagnet?) all its dipoles will align uniformly with the external flux like the needles of compasses aligned with the earth's flux.  When cool, the magnet exhibits the combined strength of all the dipoles that were previously working against each other.  We know that atoms repel each other because of their electrons (and even their nuclii must be forced together to fuse because of protons) like basketballs with ballbearings at their centers, where the skins are made of rapidly orbitting electrons.  Whereas the basketballs would repel each other in any given positions, actual atoms in iron crystals repel directionally and they which can attract or repel a free electron.  The magnet has collectively directed their combined force.  If each dipole has a North and South pole, we would expect the entire magnet to also have a North and South pole, and for like poles to repel, just as in the individual dipoles.  Hope that helps a little.