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It`s education, not intelligence. I`m 40. You`re 13-17. I`ve had a lot more time to learn bits of stuff.
I think it`s awesome too.
It`s not a straightforward force of repulsion between the superconductor and magnet. It`s more a maintaining of the positions of them relative to each other when the effect occured, as if they were attached by a sci-fi tractor beam. The relatively weak gravity of Earth wouldn`t be enouhg to overcome it.
The Meissner effect *repels* a magnet. It can cause a magnet to levitate only when the magnet is *directly above* the object cooled enough to show the Meissner effect.
In that case, the forces of gravity and the repulsion are in opposite directions and can therefore result in a zero net force.
If the Meissner effect strip is rotated, the force of gravity and the force of repulsion will not be directly opposing, resulting in a net force sideways. That will move the magnet down the angled strip like a wheel rolling down a hill, then straight down when it`s passed the edge of the strip.
If the strip is rotated above the magnet, the force of gravity and the force of repulsion are in the same direction - the magnet would accelerate downwards faster than under gravity alone.
This can`t be just the Meissner effect.
I didn`t think someone who would know what the liedenfrost effect was would not know about superconducting magnets. Guess I was wrong.[/quote]
Oh great one, please enlighten this lowly one who seeks to bask in the light of your wondrous wisdom:
If this is simply maglev, how does it work regardless of whether the track is above or below the cup?
You are indeed wrong. You are wrong in that you are trying to patronise the wrong people and in that you`re doing it in a very clumsy way, making it very clear that you`re talking rubbish.
Did you not even think to read my prior posts in which I refered to the Liedenfrost effect, the use of electromagnetism to levitate objects and the effect of superconductivity in electromagnets before proclaiming that I couldn`t know about them? Are you arguing that I wrote them while in a trance and channeling another spirit?
i saw it i aint crazy :P
I didn`t think someone who would know what the liedenfrost effect was would not know about superconducting magnets. Guess I was wrong.
Here`s a superconducting magnet for dummies video:http://www.youtube.com/watch?v=Z4XEQVnIF...
Maglev can work on attraction, but not with two flat surfaces as shown here.
Lquid nitrogen in the cup would fall out (gaseous nitrogen wouldn`t), but there could be some between the cup and track.
[quote]it would have to create a CONSTANT force[/quote]
That`s your best argument. The Liedenfrost effect lasts for seconds. Perhaps some form of delivery system in the cup, replenishing the liquid nitrogen between cup and track.
[quote]wait a minute...What`s keeping it on track? Is nitrogen magnetic?[/quote]
Nitrogen isn`t magnetic, but the cup could be. That could attract the cup and track with a force greater than gravity, so the cup would hang under the track, against gravity. You can easily hold something against gravity with magnets.
This is the strongest argument against it being maglev - since that works on magnetic repulsion, not attraction, there`s no way it can work inverted.
Expanding gases cannot be behind the effect here since it would have to create a CONSTANT force in relation to magnetic force to keep it floating? Also to get the Liedenfrost effect the cup should have a hole in it to get the gas between the track and what ever is keeping it on track.... wait a minute...What`s keeping it on track? Is nitrogen magnetic? Well, geniuses.
There`s a black disc underneath the cup, maybe the answer is somewhere there?
I was looking at the central strip that the object was hovvering above and thinking that was magnetised for maglev. Which wouldn`t explain the upside-down thing.
Your explanation makes more sense now that I think about it. A strong enough magnetic *attaction* between the object and the track would keep the object from falling during the upside-down thing, with the Liedenfrost effect holding it off the track. That would also explain the clear disc used as a spacer - the Liedenfrost effect requires a gap.
Were you using high-temperature superconductors, liquid nitrogen, and neodymium magnets? If not, that might explain why you failed. ;-)
UHH, I`M THINKING OF THE ROLLER COASTER OPPORTUNITIES. Upside-down leviation magic? Y/Y?
HOLY drat DID YOU GUYS dratING SEE THAT poo WTF JUST HAPPENED!?!?!
He didn`t touch the part where the liquid nitrogen was poured on
but even if he did, it`d only be really really cold..
i) Airbrake.ii) Linear induction motor. This is what`s usually used to move the train forwards, but you can easily reverse the direction of force so that it`s braking rather than accelerating.
361mph - Japanese Maglev.357mph French Lie.
It`s just not practical or cost-effective. You can`t efficiently supercool miles of track and the amount of electricity required to maglev a train without supercooling to get superconductivity is farcical. It`s insanely expensive to build and insanely expensive to run. Every maglev train loses money hand over fist. The benefits are nowhere near as great as the costs.
If someone succeeds in developing a material that superconducts at a much higher temperature, maglev might become practical. There would be some use for trains that travel completely smoothly at several hundred mph, but the track would be very vulnerable and any crash would be catastrophic.
As far as I can tell, this is an example of magnetic levitation - maglev.
Like poles of magnets repel each other - you might well have messed about with that yourself with small magnets.
So you have a magnetised track and a magnetised object - if the force of the repulsion is greater than the force of gravity on the object it will hover above the track. The stronger the magnets, the greater the weight that can be levitated.
It`s done with electromagnets. The strength of them depends on the conductivity of the material and the amount of electricity used. The coolant they pour in (probably liquid nitrogen) cools the material enough for it to superconduct, greatly reducing the amount of electricity used.
Levitating objects have no friction with the ground, so they can be moved very efficiently. The maglev train speed record is 357mph.
"But I am le tired..."
That`s liquid nitrogen for those of you wondering.