Magnets attract other metals like iron but where does this force come from and which metal is this made of.
215918
All normal matter is composed of particles such as protons, neutrons and electrons, and all of these have the fundamental property of quantum mechanical spin. Spin gives each one of these particles an associated magnetic field. Because of this, and the fact that the average microscopic piece of matter contains huge numbers of these particles, it would be expected that all matter would be magnetic. Even antimatter would have magnetic characteristics. However, everyday experience shows that this is not the case.\n\nWithin each atom and molecule, the spin of each of these particles is highly ordered as a result of the Pauli Exclusion Principle. However, there is no long range ordering of these spins between atoms and molecules. Without long range ordering, there is no net magnetic field because the magnetic moment of each one of the particles is cancelled by the magnetic moment of other particles.\n\nPermanent magnets are special in that long range ordering does exist. The highest degree of ordering exists within magnetic domains. These domains can be likened to microscopic neighbourhoods in which there is a strong reinforcing interaction between particles, and as a result, a great deal of order. The greater the degree of ordering within and between domains, the greater the resulting field will be.
581308
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)
672959
It truly depends on the amount of Iron in the magnet as to the strength and the base material that it is made of.  Some of those cheap rubbery refrigerator magnets will deteriorate or dry rot over a period of years and thus lose it's quality.  \n\nHow ever a good solid high iron ore magnet will easily out live you.  (with proper care)
341081
Mostly they use magnetic fields.
474920
electricity is either made by chemical reactions, or by moving a magnetnic field over a copper wire, as i am sure you allready know, so the problem is geting a force that can move the magnet, to give inductance in the wire. causing a current to flow.\nwater turns the blades of a fan, or tubine whitch is conected to a magnet witch turns inside a copper coil.\nso any natural way that can generate enough force to move the magnet, can be used.\nwith nuclear the heat is made in a chamber called a reactor whitch turns the water to steam the steam turns the turbine whitch is conected to the magnet.\nif you have a propella connected to a magnet that is moved by wind that is driven by the sun, inside a copper coil you get some electricity\nin water fall the downward force of the water turns the blades, withch turn the magnet, inside a coil,\nall diffrent ways of doing the same thing.\nnot sure about forrest though, unless you burn the wood to make steam, to guess what turn the magnet inside the copper coil. or maybe you could cover the tree in magnets, and buld a copper coil next to it, then wait for the wind to sway the tree
272478
Magnets, dropping it, heat, water/humidity, age.
325046
Naturally occurring magnets are made of magnetite and iron pyrite. Some man made magnets are basically soft iron or iron powder mixed or molded into shapes and then magnetized. Some of them are called electromagnets and use ac current to create an electromagnetic field. The Earth itself is the largest naturally occurring magnet on the Planet.
251250
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.
252071
Gravity is not caused by magnets. It is caused by matter itself, but it only happens noticably when theres a LOT of matter together (the earth is a LOT of matter).\n\nWe dont really know why matter causes gravity. We cant even measure gravity waves, but we're trying.\n\nString theory is a mathematical system which tries to explain gravity. I dont understand any of it, but thats what people who want to understand gravity are studying.
448090
Do you mean what two metals repell each other? Well, in that case, substances repel and attractact based on their polarity.
136295
The magnets create a magnetic field, in the same way that matter creates a gravitational field.  The magnetic field causes the magnets to be attracted to each other.  The energy for this is stored as potential energy within the magnetic field itself.  If you were to let go of the magnets then they would more towards each other and thus the potential energy is being converted to kinetic energy.  \n\nWhile you hold the magnets apart, they don't lose any energy.  However you do use up energy, as you stated.  So energy is being lost but only if you include yourself in the system.  To try and clarify this think of holding an object above the ground.  Energy was required to raise the object (e.g. a ball) and this is stored as gravitational potential energy that will be converted to kinetic energy if you drop the ball.  But while you hold it the ball does not lose energy, but obviously you do, as you are holding it.  However in physics questions we tend to ignore this energy loss because we could always imagine that the ball was raised and put on a table, and thus not being held by you.  \n\nThe same goes for the magnets, the physics does not change if instead we imagine that the magnets are on a table and being held apart by being stuck to the table (perhaps by blue tack).  So as a result we tend to say that energy is not being lost (i.e converted to some ofter form), as we are only intersted in the magnets.\n\nI hope this is of help to you.
156598
Do you mean "magnetic"?????
324842
Magnetic property of a material is due to the arrangement of Domains in it. If you are not of science background, simply think it as it is the arrangement of atoms of the material, which is responsible for its magnetism. If you provide a permanent magnet with electric supply, the arrangement of atoms in it will be disturbed resulting in loss or decrease in its magnetism.\nNot only the electric supply, but heating or even strong jerks can also lead to the disturbed atomic arrangement and therefore decreased or completely lost magnetism.
50862
Three types of magnets:\n\n-Ferromagnets: Magnets which retain a magnetic field after having been magnetised in a magnetic field.\n\n-Paramagnets: Magnets that only exert a magnetic field when they're in another magnetic field.  They support the magnetic field they're in.  Usually their fields are quite weak compared to the external fields.\n\n-Dimagnets: Magnets that exert a magnetic field when they're in another magnetic field but opposing the field.  (Think: *DI*ametrically opposite).  Again, field intensity created by these magnets typically is very small compared to the external field.\n\nAdditionally, many dimagnetic and paramagnetic materials may become ferromagnetic if they are sufficiently cooled.\n\nPermanent magnets are most often ferromagnetic and will retain their magnetism for a long time even in the absense of a magnetic field.  Over time, however, thermal effects will slowly decrease field intensity, but that takes a long time for permanent magnets.
265124
A magnet consists of molecular magnets.\nIf these magnets are arranged uniformly then the magnet will be stronger.\nIn an ordinary piece of iron there are molecular magnets, but since they are irregularly arranged there is no net magnetic field created.
127156
No there is no substance which can block magnetism except another magnet.  You can block electromagnetic energy quite easily depending on the strength.
153311
Gee .. been a while.  If I remember correctly the magnetic field is perpendicular to the electrical field.  Thus around the two wires the magnetic fields move in the same direction and combine, producing a net attractive force.\n\nIf the currents go the opposite direction, the forces repel.\n\nSee the link below for a more detailed explanation and pictures: