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quote:A ferrofluid is a specific type of liquid which responds to a magnetic field. Ferrofluids are composed of nanoscale magnetic particles suspended in a carrier fluid. The solid particles are generally stabilized with an attached surfactant layer. ApplicationsThey are used in loudspeakers to sink heat between the voice coil and the magnet assembly, and to passively damp the movement of the cone. They reside in what would normally be the air gap around the voice coil, held in place by the speaker's magnet.Ferrofluids are similarly used to form liquid seals around the spinning drive shafts in hard disks.Using electromagnets and sensors, the viscosity of magnetorheological fluids can be controlled dynamically, allowing for active damping (in car shock absorbers like Delphi Corporation's MagnaRide, for instance). This allows hundreds of watts of mechanical power to be controlled with a few watts of electrical power, which is much more efficient than other methods of vibration control, such as piezoelectric crystals.They also have friction-reducing capabilities as well. If applied to the surface of a strong enough magnet, such as one made of neodymium, it can glide across smooth surfaces with minimal resistance.
quote:Originally posted by neilepStill, a magebtic liquid does sound fascinating !...Could one heat up a magnet till it melts ? Men are the same as women, just inside out !
quote:Originally posted by neilepThanks Robert.Does ther magnetism return once the magnet cools ?....so where does the magnestism go ?
quote:Originally posted by Mr AndrewWhile we're talking about magnets, I did some research and found out that people have used strong magnets to levitate objects like water and a frog! Every molecule in the frog is polarized to make it diamagnetic. Pretty neat stuff there too. Hover cars?!"His mind is the ultimate weapon!"-MacGyver television series
quote:Originally posted by ukmickySO COULD THEY LEVITATE ME, WOULD THERE BE ANY HARMFUL EFFECTS
quote:Originally posted by Mr AndrewWould you want to wear a suit filled with bismuth? I don't think you'd be able to move. Good luck with that!!
quote:Originally posted by realmswalkerOMG that is perfecti can do what i was hoping i can!If you had a ring with VERY powerful magnets pointing towards the center of the ring, all the same pole (yeh theyd repel each other alot, but you can fight that) and you put that ferroliquid into it, if you had the magnets set right (slightly stronger ones on the top) you could have a wall of fluid that you could pass through, but wouldnt be visible through....i think. The very center would have influences of all the magnets (the way the feilds are shaped) and therefore you could make it so that it was equally attractive as the area closer to the magnets, if not more attractive.This might not seem like much, but if it is a Magnetorheological fluid, which gets harder as more magnetic feild is applied, you could make a wall that could be turned on and off quite easily, or made semi permeable!Doing more research i found there are the same type of thing, only with electrical current, and ones that are both....I know my idea would work...and It would be really cool....ima design one, ill post what i design!Thank you so much