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Superconductivity also finds applications in the field of nuclear fusion. One of the tracks studied to attempt to reproduce the energy of stars on Earth is based on the design of a machine called under its Russian acronym "Tokamak".

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During the week we have seen a conference about superconductivity. A scientist told to us the mecanism of superconductivity. A superconductor is a metal object which is cooled with liquid nitrogen at -196°C. As it is superconductor, it can keep all the current all the time. And with superconductivity, you can do a magic trick very impressive : you can do levitate a magnet.

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The experiences look like were very magics but it was just chimic . The conference was great.

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This conference was very interesting. The man who did the experiments was very clear. We could try the liquid nitrogen and it was funny

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I think a superconductivity can change our future. We can live differently

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The supraconductivity is impressive. It's like magic, but It's only a physical reaction with magnetic fields

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The superconductivity will be use in the future because we saw an exemple about train in Japan.

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In 1933 the scientists Meissner and Ochsenfeld discovered that the materials superconductors cool under a magnetic fields outer eject the field's line as long as the latter remains less than a certain critical
field Hc

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The liquid nitrogen is at a temperature of (-196°C).
And when you reversed the nitrogen on the floor it formed cold steam is not liquid like water.

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Click on the icon

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We saw a video about the super-fast japan train. It can go that fast thanks to supraconductor : as it levitates, there is no more friction ! More than 600 km.h⁻¹!!! Incredible !

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He told us that in France they made a levitating Eiffel Tower thanks to the supraconductivity

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One of the main goals of the scientists these days is to create a superconductive material able to use its zero electric resistance particularity around room temperature. If this can happen, around 30% of the electricity going through French cables would be saved. Because yes, we lose almost 30% of energy. A superconductive material in there would be a massive economic save.

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Superconducters were discovered in 1911, and we know more and more about them.

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The incredible thing was liquid nitrogen. When you put your hands in it, it's like water but when you remove them : it's not wet !!! INCREDIBLE !!!

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to become superconductive, a material need to be cool down to a temperature near to the absolute zero (-273°C = 0°K)

When a superconductor is cool down, it create a magnetic field because the electric current turn in an infinite loop.

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I think the superconductivity is the future. The news technologies,  means of transportation, particle accelerator and medical imaging use superconductivity. I hope that will be use more and more.

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The scientist has come with magnets, liquid nitrogen and glass slide when he pour the liquid on the magnet, the other can levitate like picture in background.

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There was a ring with magnetic parts all around it (like a wheel).
The scientist put a small glass strip on the ring and then the supraconductor (mercury).
He poured liquid nitrogen all over the ring and the mercury.
He took off the glass strip and the supraconductor was levitating (like on the wall picture).
He pushed a bit the mercury and it rolled (well, it was levitating)  around the ring without falling, and very fast.
It was very fun to see