Liquid helium is colder than anything else on the face of the Earth. They cool the magnets with helium so the wire they're made out of will superconduct - flow electricity with no resistance. The LHC's magnets use 1.5 million watts of power all tolled; imagine how much they would need if the wire had even a thousandth of an ohm per meter resistance!
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Most superconductors only become superconducting at very cold temperatures, and liquid helium is a common coolant for superconducting magnets (which there are a lot of in the LHC). There are liquid nitrogen temperature superconductors, but as far as I know they're all fairly brittle and hard to make into wire, which limits their usefulness in constructing superconducting magnets.
It's also possible that liquid helium might be used for cooling certain of the detectors.
Helium is a chemical if you breath that chemical through a balloon or anything that involves helium will shut your body off.Helium can be a very dangerous chemical Helium is an inert gas, and despite the fact that some inhale it to change their voice temporally, I don't suggest inhaling. You need gas exchange to live.
Hadron Collider - high powered electromagents in a ring, orientated so that they accelerate the particle (typically a neutron) at the molecule you want to break up (this might have to be repeated several times depending on the size of the molecule). This will most likely break apart the molecules as well as the atoms though... (depending on the velocity of the particle.) Hydro-carbon: heat is best, therefore Bunsen Burner, Furnace or High Powered Lasers etc. Electrolytes: use electrolysis, therefore two conductive rods (typical carbon) connected to a power supply, of which you have to melt/dissolve the material beforehand.
The LHC is for the most part absolutely safe. No need to worry about it causing Doomsday anytime soon. Though they say it could cause a micro black hole that would only exist for one-millionth of a second. Possibly it can create Antimatter that reacts to Normal matter. I also have read that it could create particles called Strangelets which is matter that will turn what ever it touches to its self and so on until all matter around it is a form of its self. Luckily for us the possible Black hole will not be around long enough to even tell (unless they are actually able to pick up the radiation it produces with a sensor and prove that it came from a subatomic black hole). Antimatter can be contained within a vacuum so it has no ability to react with normal matter; and Strangelets are only a scientific theory.
You will need cardboard or balsa wood for the frame and gondolaÊof the airship. For the blimp itself you will need a mylar bag or some other kind of nylon material, as well as helium.
you need food they eat rotten fruits. for its habitat you need a large inclosure give them some heat occaonaly. there you go.