What is the Strongest Magnet We Possibly Could Make?

[@SciShow]

Visit brilliant.org/scishow/ to get started learning STEM for free, and the first 200 people will get 20% off their annual premium subscription.

[@greensteve9307]

* metric tonne. There is no such thing as "metric ton". It is ALWAYS spelled "tonne" when you are referring to the metric weight.

[@NoMusiciansInMusicAnymore]

What's 20% off free?

[@waynegnarlie1]

How large of an asteroid could this 25-Tesla magnet protect from radiation, as well as Earth's magnetic field?

[@warload420]

​@@greensteve9307p]]ppp

[@thevikingwarrior]

God created magnets so that small children can play with them! 🤣😂 With that said, they can have hours and hours of fun!

[@swilkobarfingtoniii1642]

I liked how you did everything you could to avoid saying the words "Flux" and "Capacitor" together. Impressive.

[@N3ur0m4nc3r]

😅

[@SciShow]

We do what we can.

[@ChrispyNut]

Oh yea, another bad joke they skipped. I'm even more disappointed now. This is usually a good place for bad jokes/puns.

[@THATDAMNEDGAMERDoesStuff]

@@ChrispyNut dang bro, you really upset about that huh😂

[@ChrispyNut]

@@THATDAMNEDGAMERDoesStuff Devestated, Bruv. If I gave two hoots about "Christmas", this woulda ruined the whole thing for me. It's certainly ruined the year. 😏

[@TAP7a]

I remember studying for exams we take at 16 in my country and at the time 3-4T was considered absurdly strong. Starting off with 11T really sent home how far this one niche has come in just a decade or two

[@Naokarma]

I mean, 3-4T IS absurdly strong. We just tend to redefine "absurd" every few years. Reminder that Earth's magnetic pull is ~0.0005T (give or take a 0. Might be miscounting)

[@Cartermchick]

@@NaokarmaI think that’s correct, it’s roughly 50 microtesla according to google

[@chew_1993]

I’m more impressed that someone was like “hey what if we use a big magnet to align people’s protons”

[@foty8679]

I want to know how strong a magnet needs to be to rip those protons out of people.

[@DemPilafian]

To this day Dr. Evil is still irate that his brilliant idea was stolen in order to make medical devices that help save lives.

[@iainballas]

@@foty8679 Before that happens, electron orbits get disrupted which causes molecules to break apart. You'd be torn to shreds, and then the electrons are stripped from the protons altogether, and then you rush towards the magnetar that you somehow got too close to.

[@morthra2]

It started out with NMR spectroscopy in the 60s. It was useful to determine the structures of organic structures. Eventually someone realized that you could do three-dimensional NMR with a tracer, and with some complicated math, turn that into an image.

[@scrotymcboogerballs6756]

@@morthra2 thanks for the explanation

[@mattalevine]

12:49 "So that explosion was actually a sign of great progress!" What an amazing sentence.

[@Theoryofcatsndogs]

That was what they said about the A bomb

[@florianellerbrock8922]

Achievement unlocked: proton bomb

[@ooooneeee]

I'll make a note here: huge success.

[@voodoovince8001]

What is a fission bomb but a volatile Nuclear reactor

[@Shifter-1040ST]

Krogan scientists approve

[@tobiasheal]

The first magnet, ISEULT is located in the CEA near Paris, where I work. I work I a completely different field so it's cool to see a bit about the other sorts of things that happen in the centre.

[@Markusthurmanius]

How bad is the chemical shift on an 11T magnet? Have you seen any of the images?

[@tobiasheal]

@@Markusthurmanius I have to admit, I have no idea, when I say I work in a different field, I mean a completely different field. The CEA is huge and contains loads of labs with so many research topics going on at once. I work in archaeological science.

[@SciShow]

So cool!

[@jackaw1197]

I too, work in a non-magnetic field.

[@davidadams421]

@@jackaw1197 This comment needs many more likes.

[@rowandoyle7]

My dad designed MRI machines for 25 years, up to 7T. He was so glad to not be in charge of keeping the liquid helium in the coils since it's a superfluid

[@michaellashansky9471]

What about the 36 Tesla magnet that was made by Superpower Inc about 10 years ago?

[@BenjaminCronce]

I bet there are some interesting engineering issues dealing with super-fluids in a commercial application

[@shufflecat3334]

In my head there's some sort of inside joke behind 7T and that sort of stuff is, like, my favorite thing on Earth :)

[@branchcovidian2001]

@@michaellashansky9471 It would be _overkill_ for an MRI.

[@davelowets]

@@michaellashansky9471 What about it??

[@4Rhino60]

I really liked how detailed you explained the actual purpose of those magnets love your videos in general, but this one was outstandingly interesting!

[@SciShow]

The team worked super hard on this one!!

[@ross-carlson]

@@SciShow Oh come on, be honest Hank - your team works super hard on _everything_ you guys produce!!

[@joehelland1635]

From personal experience, dont wear tight polyester clothes in an mri..... not a fun time

[@AltonV]

@@joehelland1635 what happened? The best fabrics to wear inside an mri device is considered cotton, polyester, and wool. But some clothes might be mislabeled and contain some metallic threads which can cause burns, and some heat-retardant fabrics can trap heat and sweat causing a burning sensation

[@prapanthebachelorette6803]

@@AltonV i wonder too

[@whistlinturbo]

I'm a bit sad that you didn't mention the magnets used to separate Uranium-235 from Uranium-238 during the Manhattan Project. When they flipped them on for the first time, they ended up ripping out some of the giant fasteners holding together the steel beam structure of the warehouse they were in.

[@Stettafire]

I'd be in favour of an additional video taking about that

[@whistlinturbo]

@@Stettafire I wrote a research paper on the Manhattan Project for a war history class in college. It was absolutely fascinating. It was 28 pages and I feel like I barely scratched the surface. It could easily become an entire series if they wanted it to.

[@dexterPL]

@@whistlinturbo get The Making of the Atomic Bomb - by Richard Rhodes, this is full story, better that most movies

[@benwu7980]

@@dexterPL I am pretty excited for the Oppenheimer movie this year, the trailer looks pretty good.

[@christopherleubner6633]

Yup calutron magnets. The wire used in these was made of silver so they worked better, but that was not the reason. World war 2 valued copper for making brass for cartridge casings.🤔🤓❤

[@Amboss39]

I have an uncle who researched from MIT at Cern and led a group. Therefore, I was allowed to visit Cern and went for a walk in the ring and stood in front of the huge magnets that measure the collision of the particles. It was very special.

[@PartiallyCooked]

I like how we can just casually create, configure, and destroy very important magnetics fields at any point we want.

[@JasonMTuftsify]

I'm one of many millions, but thank you for the great video. This maybe not my field of experience, but none the less just learning more has always been a goal of mine which I have to say this video brought new light to just how important magnets are and what they can be used for/use.

[@tammyhollandaise]

Some years ago, I toured the imaging department at Oregon Health and Science University. They have a 12 Tesla MRI, but it is only large enough scan a rat.

[@deusexaethera]

Or a disembodied brain. Just sayin'.

[@KnightSlasher]

This is Ironman greatest enemy

[@black_rabbit_0f_inle805]

I thought it was alcoholism

[@MrRez808]

Seawater

[@feisaljauharitufail]

Agree. Especially with nanotechnology because it's a lot smaller.

[@Thund3rDrag0n12]

Iron Man actually does have non-magnetic armor made of carbon fiber, ultra-hard ceramics, and plastics. Turns out when you exist in the same universe as Magneto, it's smart to invest in tools against powerful magnetic forces

[@musicplus6306]

Iron man had a non magnetic alloy of gold and titanium...

[@spiderdude2099]

Scientist building the 1200 tesla machine: *looks down at copper tubes* "........I'm so sorry for what I'm about to do to you..."

[@thomasolson7447]

I think this is a field that could benefit from color mapping. If you assign a color to each point on a torus with some kind of function, you get different colors on the surface. You can do different functions and mess around. You can do or even just a sum with a gradient scheme.

[@krystostheoverlord1261]

Oooo I'd love to program a display for something like this, I've worked on projects before converting data into colored 2d maps from ultrasound devices, it is super fun

[@emerald2805]

I love how excited Hank gets about science.

[@JohnDrummondPhoto]

Today I learned that Doc Brown was actually onto something back in the 1980s.

[@CapnCrunchESO]

Video title should be “Japanese researchers create flux capacitor”

[@dillonjohnson6017]

defintley one of your best videos recently thank you guys for continuing to produce amazing boundary pushing content!

[@spacemissing]

I'm happy with the N52 magnets I've bought. They are hard enough to separate that anything stronger would be impractial for my purposes. But none of my papers have fallen from the ceiling in my pickup!

[@-Slinger-]

If/When you do an episode on fusion, will you look into Helion's method as well as the tokamaks please?

[@SciShow]

Oh yeah...though Real Engineering's video really hit it out of the park already!

[@-Slinger-]

@@SciShow True

[@ChrispyNut]

That actually came to mind during this video, when talking about the LHC. Was thinking they seemed to get those gasses up to speed in a [relatively] REALLY short chamber, but then I realized I couldn't recall the speeds they claimed.

[@-Slinger-]

@@ChrispyNut I seem to recall mach 3, but I could be way off.

[@dl5244]

@@SciShow maybe worth a mention of their electro-magnetic flux compression literally resulting in fusion... but instead of a rigid container exploding, they capture the outward pressure release in their electro-magnet coils as electricity? This direct conversion from electricity to fusion energy release and back to electricity using magnetic fields is reminiscent of Tesla's experiments ~130 years ago (with mechanical motion in place of the fusion)!

[@mesillahills]

I worked at Delco Remy Division of GM in Anderson, Indiana when Dr. John Croat invented the Neodymium-Iron-Boron magnet. I actually got to know him well. This was the so-called Magnequench rare-earth magnet. Later, I was trying to develop an injection moldable grade of powder for them. After I retired, Magnequench was sold to the Chinese. A man named Joe Lehman built and managed the first GM Magnequench plant in Anderson, Indiana. FYI - Magne (big) + quench (cool). If I remember right it was over a million degrees per second. You were never a genuine MQ engineer until you got your first "finger between magnets" blister. Those suckers were unbelievable.

[@davelowets]

"Blister"? Today there are magnets small enough to handle that would CRUSH the bones in your finger if they came together while your finger was between them.

[@mesillahills]

@@davelowets Actually that was somewhat true back then. MQ was working on what they called MQ-1 only. But much more powerful MQ-2 and MQ-3 were in development by John Croat. He knew it could be done. John had a large 3D "model" on his desk which could be used for him to explain how all this worked. I was actually working with a lady in Kokomo, IN. who was once the head of all magnetics in Russia, She defected while on a trip. We were trying to produce an injection moldable grade. I was also working with Penn State on the same thing but she did not know it. I did not work directly for MQ. I worked with them. I was in a separate advanced development skunkworks at Indy. We were about to produce our first practical injection molded part when I retired. The idea was to show our customers what could be done, not compete against them.

[@adamtschupp9825]

I've always wondered, if you took a permanent magnet and stuck it on the ceiling, will it eventually weaken and fall as it uses energy to resist Earth's gravity? How long would that take?

[@tanin34]

A long long time I believe

[@nuthenry2]

they have a half-life of 700 years, so after 700 years they'll be half the strength

[@rgbii2]

You should start this experiment today. Please have one of your great-great-great-great-great-great-great-grand children come back here and post the results.

[@howdy832]

It doesn't need energy to resist earth's gravity, the same way that your cieling paint doesn't. Energy needs motion in order to transfer. Though as others have said, all magnets are temporary so eventually it would fall

[@Blewlongmun]

@@rgbii2 An old glass table with a bunch of magnets on a metal plate would actually be kinda sick. Oh pappy made that back in the 2020s, the first magnet fell off last year.

[@ODSoldier]

An Agency titled "ERDA" (Energy Research and Development Administration) of the US Government had a contract (award?) with the University of Tennessee to study power production using an MHD generator (Magnetohydrodynamic Generator) in June 1976. The initial test bed for this was a jet engine burning plasma like fuel made from coal and the jet exhaust passed through a strong magnetic field to strip the electrons from the hot gas. I retired from the US Army one year earlier (Enlisted E-8) having worked in Metrology and Calibration. Completing a BS in June 1976 I was offered a contract position to install and maintain instrumentation for the project located in Tullahoma. When interviewed for the job I was given a look at the test bed. As I recall the jet engine was about 12 inches diameter and about 4 foot long. The current source for the magnet was simply a large bank of DC Arc welders. It was an interesting project but one week later TVA offered a position repairing instrumentation on the Browns Ferry nuclear plant damaged by a bad fire. I've often wondered what happened with the MHD project. As a side note I heard at that time (1976) Russia had the strongest magnet in the world.

[@tx2sturgis]

11:45 'flux' and 'capacitor' used in the same paragraph. Now, what did I do with my Delorean?

[@lowkey_Ioki]

I love how a few thousand years ago we were smashing rocks together just to see what would happen, and now we're smashing protons together at the speed of light for the same reason.

[@ObservingBlue5943]

"The explosion was a sign of great progress".... Now that's what I call science!! 😁

[@Hans-yb5jc]

3:36 Absoluetly gigantic machine. One day, it will be shrunken to a practical size, like the giant computers of the 60's that evolved into nowadays handheld devices. I think the breakthrough will not be in the lower temperatures of the conductors but in the material the conductors will be made of.

[@ellayararwhyaych4711]

10:00: Carbon nanotubes may have great electrical conductance and efficiency characteristics, but it doesn't have any semiconducting characteristics needed for computer chips. So, no - carbon nanotube processor gates are out of the question (but can serve only as conductors on the chip).

[@0rphio333]

I was questioning this but for the wrong reason. I initially remembered silicon as being "what computer chips are made of" for some reason uncritically thinking it was the green part *facepalm* but after a quick Google search I immediately realized silicon is a semiconductor and that increasing conductance isn't the point since we have a whole class of materials cheap and accessible that would better fit the job, literally just copper being a conductor would be more efficient (financially speaking) in production if the point was less resistance than silicon. Regardless any advancements in material science is a plus, just more tools in the toolbox right. We may not have an obvious use yet, but from playing MTG even if it doesn't already have a home that doesn't make it pointless.

[@antarbenson9328]

So Tokyo made a Flux Capacitor? So does it make a doomsday device or time travel possible?

[@icollectstories5702]

Perhaps time travel, but you'd have to pass through the ring at minimum diameter!😜

[@antarbenson9328]

@@icollectstories5702 right, cause you never really know which. Depending on the story universe it's always one or the other or both. I think if you don't get the ring right it goes unstable, explodes, causes "the fall", and become the catalyst of the super high tech magical anime society...because still Japan.

[@Flesh_Wizard]

It has to reach 88 mph first ;)

[@threeMetreJim]

@@icollectstories5702 No time travel, there was always less toilet paper on the roll afterwards.

[@pmh2390]

I like when they compress quarters using a similar setup as the electromagnetic flux-compression magnet

[@davelowets]

Putting quarters on a train track is MUCH more effective, and WAY easier... 🤔

[@juanchox7]

12:33 looks like a scene in some sci-fi movie about scientific hubris, the part where scientists inadvertently summon a portal to the nether world

[@AlfredEiji]

The violet flames really sell the otherworldly consequences.

[@deusexaethera]

0:07 - "There's something mesmerizing about watching an invisible force make two pieces of metal leap together..." *Gravity:* "Am I a joke to you?"

[@da33smith37]

What a really fascinating presentation. You set the bar really high!

[@asa9528]

I love scishow so much! Especially Hank’s episodes. This was so interesting!

[@kepspark3362]

This is inspiring & rekindling my interest in physics. Thanks!!

[@jzero90921]

I watched you and your brother in years and continue to do so today. I think that speaks volumes

[@WizardofTruth]

Innteresting and well made video. Thanks for making it

[@phookadude]

So one coolest things I know is how an electromagnet works. A magnet is produces by an imbalance of charges, in regular matter there are as many pluses and minuses and those are very close together so the field is a tight little ball that does things like make things solid. In a bar magnet there are zones that have irregular boarders that have just a very few charges that don't have opposite charges paired with them, remember the EM force is 10 to the 36 times stronger than gravity so only a few out of place charges will allow a refrigerator magnet to defy gravity. In a electromagnet the charges in the wire wrapping the core are moving, and the movement is about walking speed around the wire. This tiny movement causes a relativistic length contraction of the charges as they move around relative to the stationary charges they are pared with. The length contraction means that the charges "see" less of the opposite charges and this creates the imbalance that frees the magnetic field. So electromagnets are a demonstration of special relativity having an effect at 5 or so miles an hour.

[@LordPratticus]

I am so grateful for the people who make up Scishow. ♥️

[@nobody6032]

You're welcome

[@deusexaethera]

They don't make it up. They research it.

[@DavidLindes]

11:27/11:43/12:24/etc. - this bears striking similarities to electromagnaforming... e.g. for making a "'quarter shrinker"... which I participated in at a makerspace once... much fun -- but also, scary scary stuff. We're probably lucky to all be alive. Exploding copper coils are no joke! Containment was a serious challenge, and our first tries at it were....... less effective than one might hope for, for safety reasons.

[@Phoenix-ug1ru]

so the tokyo team basically just pulled a pistol shrimp move but with magnets, im pretty behind thats cool!

[@fss1704]

Man i wished more people would know the reference.

[@BlaugranaEverything]

2:30 "totally harmless" is not correct, "unlikely to cause harm" is the phrase you're looking. Strong H Fields can do harm by causing heat damage, granted other forms of damage have still yet to be backed by any kind of research. But from what ICNIRP has so far researched and published it's incorrect to assert that MRIs do no harm. Okay now that I have my nerdy nitpick out of the way 😅, awesome video guys! I'm especially enthused about the fusion reactor, I'll be keeping track of that one!

[@AnonymousFreakYT]

11:53 - Wait… They changed the flux density with capacitors? Did they go back in time?

[@Stettafire]

Time is relative so... Maybe?

[@BrianFedirko]

1200 tesla is super exciting, and super insane. Anything over 3 seems impossibly gigantic and out of normal human usage and control. This is so far beyond what most people think about the earths magnetosphere it doesn't even compare. Gr8! Peace ☮💜Love

[@rexroyulada6267]

This video opened a can of worms to me. I now have an extra 8 tabs on my browser just because I was having an enlightenment from the properties of higgs boson particle

[@sethkeown5965]

share your findings after a peer reviewed process.

[@rexroyulada6267]

@@sethkeown5965 What I've found is that Higgs Boson particle is just evidence of the Higgs field (The filed where mass exist). So there's basically 2 fields (That I know of after looking into this topic) which are the electromagnetic field and the quarks field. Before the Higgs Boson particle was found it was only theoriezed by Peter Higgs and his colleagues on 1964 that there's a field that corresponds to mass and the more a particle interacts with this field, the more mass it will have which is called the "Higgs Effect". Now these elementary particles (The stuff that makes up atoms) usually have a spin and traits that makes an elementary particle different from other particles, and the Higgs boson particle is a certain particle that should have no spin nor traits as it is pure mass, and it decays into two muons. The test didn't really find the Higgs particle, but they did find clues and evidence that it exist namely the two muons that it decays into. Right now we assume that we have found the Higgs particle since we have traces of its existence, but we aren't fully sure if it really is from the Higgs Boson or if it's from a something else entirely. I'm no physicist, I'm just a random dude who only spent a few hours looking into this topic which is why I cannot bring any credibility to my words. If you truly want to learn more, I highly suggest you go open this Pandora box yourself to see what's inside and what insights you could find.

[@sethkeown5965]

@@rexroyulada6267 thanks!

[@rexroyulada6267]

@@sethkeown5965 No problem, good luck and have fun with your discoveries!

[@kindlin]

@@rexroyulada6267 I would note that there are many, *MANY* fields in nature. Just a short list, but: • there are (17) base particles in the Standard Model, • Gluons are actually (8) particles, • while W bosons are actually 2. • The photon field is actually 2 fields as well. • Now, for every particle that has a separate anti-particle (most of them), you double the fields. • Further, for every particle that has spin (most of them), you double the total number of fields, AGAIN. • What about chirality? • What about dark matter? • Dark energy? • What about GRAVITY at all? And so many other possibilities.

[@pilsnerd420]

2:45 When doing our waves unit in high school physics we took a tour of the MRI/Ultrasound lab at the university. The professor said that if you quickly stick your head into a 3+ tesla MRI it'll induce a current in your brain and make you hallucinate for a few seconds. I dunno if it's true but the way he told the story made it sound like it's something he does regularly for fun.

[@danielsahlberg4576]

The more I learn about physics the more I sense that magnetism feels less like magic and gravity feels more like magic.

[@patrickhenigin4805]

Magnets are easy to understand. At least I think I understand them. Gravity, not much. Most people think grabity is a force.

[@DuckDoolittle]

@@patrickhenigin4805 Gravity is one of the four fundamental forces if I’m not mistaken

[@ThePowerLover]

@@patrickhenigin4805 But electromagantism IS magic, the electroweak theory is (wrong) "incomplete", so we don't truly understand magnets! Magic is something you can study to have a less wrong "understanding" of it, we have studied magnetism for at least more than 2.000 years. But yes, gravity is more strange.

[@ThePowerLover]

@@DuckDoolittle Not quite in our current "understanding".

[@TheRealFreznoBob]

That's only because science, in it's current form, is more belief and math than realistic and observable. Gravity is just a word, it doesn't exist, at best it is just a description of what is going on, it has never been an explanation for it. Electricity and magnetism are actual things that can be sensed and it's elements known if not understood. Nobody has ever found a graviton nor discovered how gravitic information is transferred nor even what it is. Maybe MAYBE it's all just electricity and magnetism? Science is run by sycophants and their forerunners have become saints. It's time to throw them out with their filthy bathwater.

[@kerzwhile]

Best condensed description of the LHC I've heard!!

[@glennbabic5954]

-273K or Absolute Zero isn't the coldest temperature possible because it is impossible. You cannot stop the motion of atoms completely, because you'd then know their position and this would violate Heisenberg's uncertainty principle.

[@coltynstone-lamontagne]

Yeah but that just means It's the mathematical limit and most laymen would just say the number at that point

[@jonnorth8089]

Y'know what? I love how when I was in school I never found enough interest to pay attention to stuff like this but as an adult I watch educational yt videos and think "hm! That's pretty cool!" and "whoa bro, that's crazy!"

[@militantpacifist4087]

*Laughs in magnetar*

[@williamdetempolivre]

Ah! Yes, I have my ultra compressed star core right here in my backyard. I warn you, don't try to get too close, it tends to hug things very tightly...

[@litterbox019]

@@williamdetempolivre the backyard scientist goin wild

[@iliketrains0pwned]

Calm down Duarte

[@Flesh_Wizard]

For when you want a magnetic field strength of yes

[@Erhannis]

Wow. For others: apparently normal neutron stars have magnetic fields of 10^4 - 10^11 tesla, and magnetars have fields of 10^11 - 10^13 tesla.

[@nyxstyx388]

I love that "exploding something to get more data on exploding things" is pretty much a fundamental human trait

[@scottmantooth8785]

*7:16**...you know this is seriously cutting edge science when you get to use the term whizzing around to convey a concept or mechanical function or process*

[@reedfish99]

I loved this episode! Thank you for putting so much effort into creating this one, jeez magnets are fascinating, seems like we’re on the cusp of some breakthrough technology!

[@shanehayes2274]

Such an incredible way of explaining the concepts of MRI!

[@Autom_te]

On this episode of WatchMojo we'll be counting down the five most powerful magnets in the world

[@ProducerX21]

It’s pretty crazy that having a super strong magnet realign all the spins of protons in all the atoms in your body has no damaging effect

[@tarmaque]

Think of it like combing hair. The comb simply aligns all your hair in the same direction, without (in general) damaging the hairs themselves. It's not a perfect analogy, but it's the best I could come up with.

[@davidadams421]

I wonder what would happen if we rapidly switched the polarity of the magnetic field? Would we heat up like in a microwave? I mean fundamentally that's how a microwave oven works, taking advantage of the dipolar nature of water to rapidly 'jiggle' H₂O molecules. Expand the concept to all atoms... Is that what was happening in Logan's Run, I wonder.

[@wesleyboyer6654]

12:45 Would it still have exploded if there was no 02 in the room? Or does the compression tube liquefy and loose stability?

[@MasterOfYoda]

Fridge magnets have actually gone a long way recently, mine are neodymium and can reach up to 1 Tesla. It's incredible how fast the field is progressing.

[@JohnSmith-kc6ov]

...no you don't. You don't have 1/5 of an MRI machine to hang pictures on your fridge.

[@MasterOfYoda]

@@JohnSmith-kc6ov That's not how flux density works. If I could magically compress 7 neodymium magnets into the same volume then yes, but, you know, solid matter and all. They are, however, in the 10K Gauss range which is around 1 Tesla iirc.

[@MasterOfYoda]

@@JohnSmith-kc6ov Decided to double check, "Magnet strength chart" google search says neodymium magnets are 2000-5000 Gauss, so up to half of 1 Tesla. Fridge magnets are 100 Gauss, so 0.01 Tesla.

[@alexreza1552]

1:32 “ is this the one that exploded” 😂

[@Saito232005]

You know what's crazy?🤔 The MIT Magnet and concept is kinda what Otto Octavious was doing in Spiderman 2. The arm apertures where essential containing the nuclear fission where there were spikes in energy. This is pretty cool. I want to make one 🤔

[@davelowets]

Not really even close to the same...

[@Saito232005]

How so? The arm apertures act as the magnetic field. Support your argument. Or are you just saying no to say no

[@retropipes8863]

Very cool! Magnetism, electricity and science in general is fascinating.

[@robbob1866]

Awesome episode. Does anyone know how to remove static from paper shredder bins, other than a wet cloth? Dumping it out in the winter is an fantastic way to witness electrical feilds but an annoying cleanup lol

[@icollectstories5702]

Perhaps an anti-static gun? They spray ions which neutralize charge differences. Wow! More expensive than I expected.

[@TheGreatDaneR]

Put a dryer sheet in the bin. Static will be reduced, and it will smell nice too.

[@12pentaborane]

Polonium-210, or anything that emits nuclei.

[@incognitoburrito6020]

I pick up the staticky object and repeatedly bump it into the nearest doorknob. It... kind of works.

[@davidadams421]

Ground it? Like put some copper tape around the top, connect that to ground?

[@cancel1913]

Hank has one helluva magnetic personality!

[@foracal5608]

Magnets for fusion reactors is a very good thing hope we get that soon

[@maxmyzer9172]

They actually already did, its just not scalable yet. Heres a kind of deep dive into how: kzbin.info/www/bejne/lZOniYuNht1-aZo

[@bettygreenhansen]

Cool. In the 80’s I told a friend the future was in magnets. Now I feel like a prophet. Thank you for making my day!

[@bluetoes591]

But what is the Tesla sum of all the magents at CERN?

[@Excedrine]

Yes

[@AageV]

More than 3.

[@DrDeuteron]

8T * 27km = 216 kilo-Newton per Amp...for what that's worth

[@davelowets]

@@DrDeuteron That doesn't equal the answer to the question..

[@DrDeuteron]

@@davelowets what do you think a "Tesla sum" is?

[@duggydo]

1200T is super strong, but in comparison to magnetars, they are minuscule. Hypothetically, if a lab in the center of the US was able to create a magnetic field as strong as a magnetar, it would kill everyone on the continent.

[@Arkie80]

Protons in line for the movie; radio wave cuts in line: Proton: 'Hey what gives! Quit shoving!' Doctor: 'It looks benign.'

[@gerry5712]

One of the big advantages of the MIT / Commonwealth Fusion magnet is it uses high temperature superconductors that can work at liquid nitrogen (77 degrees Kelvin) as opposed to liquid helium (< 4 degrees Kelvin). From thermodynamics it takes far less energy to maintain liquid nitrogen temperatures than liquid helium temperatures (look up "Carnot efficiency")

[@morestupidforms]

It's funny, we are still, basically, smashing rocks together to see what happens.

[@pawefratczak9868]

And I think we always will be

[@itsjustme4026]

3:41 the person inside the magnet would be so terrified

[@shifty1927]

Someone call the insane clown posse , they're finally explaining how magnets work.🤣

[@livingcorpse5664]

12:31 Isn't amazing how so many dangerous things are pretty like the pink sparks of this magnets explosion?

[@ASOTFAN16]

I don't know if you guys already did a video like this or not, but if not, could you do a video about temperatures? It's always been a mystery to me why the lowest we can go is -273 but we can go millions of degrees in the plus for extremely hot temperatures. So how come it doesn't go both ways?

[@MarkJones]

Because at absolute 0, motion stops. Temperature is largely just the motion of atoms, heat is the way we measure it. The real question might be why we are on the low end of the scale. Probably because, the further you go up, the quicker you get to the "Sh*ts on fire" point. Just like earth sits in the Goldilocks zone around the sun, life sits in the Goldilocks zone on the temperature scale.

[@mumujibirb]

charles' law says volume prop temp. Based on this, a slope can be extrapolated, and we will see the volume would reach 0 at -273.15C, which is impossible, so we cannot ever reach -273.15C. Anything lower, the volume would be negative, which is impossible.

[@ASOTFAN16]

@@MarkJones Yeah that's fair. The more heat the more the molecules move about. On another note, you say life sits in the goldilocks zone of temperature, but that's human life. There's always the possibility that some life forms exist that can't live in temperatures lower than 1000°C for example

[@ThisIS_Insane]

@@ASOTFAN16 In our scale we have critters that exist called 'Extremophiles'. They can survive/thrive in extreme (to us) conditions and temperature ranges. Even more so, when dealing with the higher ranges of temps in the universe. Life is tenacious, and will find a way to exist, and carry on. Like the wildlife on the ocean bottom that live clustered around volcanic vents that spew black smoke (hence, Black Smokers) continuously. That is some hot water!

[@Victor_Marius]

@Betageek52 those extremophiles at the bottom of the ocean live in a high-pressure environment, not just high-temperature. Probably the high pressure allows for a normal volume to stay in a high-temperature medium. But I wonder if the temperature of the organisms themselves is just as high as the water's temperature. Also wonder if they would still be alive in a low-pressure - low-temperature (our normal) water?

[@kwaki-serpi-niku]

Think about what a superconducting magnet is. It's essentially a big old battery. There is a tremendous amount of DC current stored in that superconducting circuit in order to create that magnetic field. Think about how that current gets put in there or how it gets taken out. You have to create a point of resistance in that circuit in order to force it to take current in or remove current from it. But if you don't control how you do that, then as soon as you create that point of resistance, the entire circuit quenches and that current flips itself into heat. So there are safety circuits in those magnets called quench circuits. This is typically made up of quince diodes to clamp the voltage in the magnet at a certain level so that it will not run out of control and burn the magnet up if there is a quench. There's also typically a dump resistor. This is basically where the current in the magnet will dissipate itself as heat if there is a quench. Of course with all that heat, then the liquid helium inside the magnet wheel immediately and violently turn into gas and expand. If there was not a exit point at the top of the magnet, then the magnet would literally explode. Since the internals of a superconducting magnet are so cold, then they tend to draw in moisture if there are any leaks. And what happens to moisture that hits minus 270° c. It turns to ice. If the ice forms in the exit point where the quenched gas is supposed to escape, then it creates a sealed vessel that will calls magnet explosion due to overpressure. The current that gets put into the magnet or taken out of is done so because they put little superconducting switches in the circuit of the magnet. These are small superconducting coils that are typically embedded in epoxy. They will also be a heater strip embedded with the coil and in the epoxy. You will apply a very small amount of current to that heater strip which will in turn create heat in that coil that will give you your small amount of resistance in the entire magnet circuit. It's not a physical switch. It's just a little superconducting coil. The reason they pot it in epoxy is because it wouldn't likely not turn resistive if it was in direct contact with the helium in the magnet.

[@swondrak]

i hope im not the only person that watched this and thought alchemy.

[@teigcarlson2450]

We live in a magical world

[@etherico3041]

At 0:47 Einstein is showing you the source of magnetism. Magnetism is the dielectric/electrostatic field. The yellow plane is the Bloch wall and the two cones are the vortex’s (what we call poles) into and out of the zero point field of the ether. But when the energy of the electrostatic field is released we call it magnetism and it is toroidal it’s all different manifestations of the same thing like ice water and steam

[@JustAnotherBuckyLover]

Considering how warm and fuzzy a regular MRI made my skin feel, I'm not sure if I even want to know how the Iseult MRI feels to go through! 😂 Edit: Before anyone else wants to go "hur hur placebo effect" I suggest you do some research. Skin warming during a scan is a known effect, and even the walls of the MRI tube measurably grow warmer during use.

[@stinkiaapje]

you cannot feel an mri field. Probably just placebo

[@JustAnotherBuckyLover]

@@stinkiaapje Trust me, you really can. Definitely not a placebo effect, especially after 45 minutes inside an MRI. It's measurable, if not super common.

[@robotronixgaming2933]

@@JustAnotherBuckyLover It is probably a placebo effect, there is no evidence to support that an MRI could make you feel "warm" or "fuzzy". However, if It is a contrast MRI, the contrast medium skin rash, dizziness, a headache, and nausea. They also could have given you something like fentanyl to aid relaxation or alleviate pain that could have made your skin feel fuzzy and warm. Also your own personal experience cannot be used as evidence to support your claim.

[@JustAnotherBuckyLover]

@@robotronixgaming2933 Johan S. van den Brink, "Thermal Effects Associated with RF Exposures in Diagnostic MRI: Overview of Existing and Emerging Concepts of Protection", Concepts in Magnetic Resonance Part B, Magnetic Resonance Engineering, vol. 2019, Article ID 9618680, 17 pages, 2019. "Biophysical, immediate effects of MRI exposures are nausea and dizziness (vestibular unrest caused by interaction with the magnetic field), nerve and muscular stimulation by the switching gradients, and tissue heating by the radiofrequency pulses." "Temperature effects from MRI exposures were established in the late 1980s of the previous century using volunteer experiments and thermophysiological modeling." Even the FDA website mentions warming sensations. But tell me again how it's all placebo. 🙄

[@robotronixgaming2933]

@@JustAnotherBuckyLoverThat's interesting, but the temperature difference that is caused is to small for your skin to detect. So unless you have ultra sensitive skin, you shouldn't be able to feel it. I will tell you again that it is placebo, because it probably is.

[@tonyshi3688]

I'm not sure where the fridge magnet flux density figure at 2:00 comes from. Neodymium magnets have a residual flux density in the range of 1-1.4 T and even ferrite (ceramic) magnets can be 0.4 T and above. Those flexible ferrite loaded plastic magnets will have a lower flux density, naturally, I don't know how much but point is, 10 mT is really small and not representative of a strong magnet.

[@rikrikonius1301]

Magnets are like a MAGic NET for metals. That's not why they're called that, but it should be.

[@13amplifiers]

As a NMR spectroscopist in another life, I often wondered how high a magnetic field could get. One thought that I had was what would happen if a large quantity of electrons was in orbit about, say, a black hole at extremely high speed or simply traveling through space in a straight line. The strength of the field depends on quantity of electrons -and- their speed. The average velocity of electrons through a wire is really pretty small but even so, we are able to produce pretty large fields on earth using lots of electrons. In space with electrons traveling in a vacuum they are able to reach much higher speeds and so should be capable of producing unimaginably large magnetic fields.

[@wernerdanler2742]

So they finally did invent the "flux" capacitor. 😆 🤣

[@wyvern3]

Was expecting the levitating frog in here, such an interesting experiment

[@ei96byod]

How much energy do the capacitors at the University of Tokyo store and pump into the flux-compressor? My guess is 1.21 Gigawatts.

[@4dirt2racer0]

around 8:40 u basically said bigger isnt always better referring to hybrid magnet, it might b very powerful at a small size, but wouldnt the power scale up with the size??

[@marcberm]

Wait... So the Flux Capacitor IS a real thing??? 😀

[@rebasack21]

i honestly wish i could get a few brain scans in that first massive MRI machine because i was born with a really bad case of bipolar and my one real hope is that by the time i die that i will be able to donate at least my brain and lifelong medical history to a science place where maybe they can figure out what genes caused this and find ways to help other people.

[@saiynoq6745]

So can a magnet be used to simulate gravity? Wouldn’t that make it possible to make large objects rise and fall steady and slow with easy , my thinking is if you can use two gravity fields to cancel each other out ?

[@liamshelley496]

I'm pretty sure that magnetic fields obey the inverse cube law as opposed to gravity and most other things that are inverse square, meaning that it's not a very good analogue as the magnetic field drops off significantly faster than a gravitational field

[@ericmollison2760]

Weird but interesting question. They actually did this a long time ago with a frog with 16T: en.wikipedia.org/wiki/Magnetic_levitation#Diamagnetically_stabilized_levitation Basically water is diamagnetic which means it opposes a field applied to it so it pushes away from magnets. Trying to do this to something large like a human will probably be a lot more expensive but still possible.

[@Chevsilverado]

Not perfectly because magnets don’t have the same drop off rate with distance as gravity. It drops off to the cube instead of square like gravity. However if you’re given an object at a set unchanging distance with a known magnetic force it’ll act as if it was gravity, but moving it around wont behave the same. They can act gravity-esque, as you can make orbits and stuff using magnets but the exact behaviour isn’t the same. So you wouldn’t be able to exactly resist gravity with an opposing magnet, and it’s also an issue of scale where the earths gravity doesn’t change virtually at all within a few feet due to its size but a “smaller”magnet will change its force a lot over a few feet. Using a strong electromagnet that you can modulate the strength of you could I guess engineer a magnetic elevator type thing but you’d have to fight against the fact that the magnet doesn’t act like gravity. Even if magnets followed dropped off to the square like gravity, the only way you could exactly oppose gravity would be to have an equally strong magnet placed the same distance away as the earths core (I think).

[@TaigiTWeseDiplomat--Formosan]

I just knew that there is a weird phenomenon called ball lightning, it's a visible ball of light flying around and or so...

[@kindlin]

A magnet can counter-act gravity on a local scale (like at the point where all the magnetic fields intersect in some magnetic tweezers), but gravity and magnetism behave fundamentally differently, as the rest of this thread discussed. And, if we could somehow control and manipulate the theoretical graviton (the gravity analog of the electromagnetic photon), then we could actually affect gravity itself.

[@sficlassic]

I used to work for Extrel back in the 80's. They built mass spectrometers. The most powerful was a 5T. Color monitors had to be 30 ft. away. If you were 5 ft. away the infomation on your card was erased and an analog watch would stop. At 2 ft. it would try to take a 1 pound wrench out of your hand. At the time I was a temp building PCB's, sub assemblies and modifying lasers for them. God, the most fascinating job I ever had.

[@sficlassic]

I don't do telegram.

[@Stettafire]

@@sficlassic Don't it's a scam. Don't feed the bots

[@onikeasisat]

Let's not forget that the biggest payouts in the markets don't come from great performances but rather it's great promotions. Stay invested, diversification for streams of incomes is very important

[@florencedaje]

I urge everyone to start somewhere now no matter how small, this is literaly the time for that, forget material things, don't get tempted,i became more better the moment realized this.

[@ashirumurtala3618]

You're absolutely right Waiting for the government to provide is a big waste of time. Investing is how you create Wealth, I started investing from pandemic crash

[@maryamibrahimusman]

How can someone who is just starting out navigate the crypto space? I don't have the heart to see the bulk of my portfolio go from green to red

[@sundayalex]

If you are new, then you definitely need some guide from an experienced investor or a professional. That's the most way to jump into the market these days.

[@osusandra7428]

There might be so many investment out there but if profit must be considered which is the actual sole aim of every investment then I'll advice you to go into bitcoin trading because it has a higher profit rate than most investments.

[@jomiar309]

You're explanation of fusion at 4:30 is one of the best I've heard, where you aren't trying to over-promise what it does, you acknowledge it generates radioactive waste, and where the energy comes from. As one who works in fission, I appreciate the simple, accurate explanation.

[@LouCadle]

I knew a neurologist who worked at Mayo when they got their first MRI. All the docs would run with glee into the office right over it with their paper clips, spill them out, and watch them dance. I assume back then they hadn't quite gotten the shielding right.

[@jakehall7350]

A video on the study of minuscule magnetic fields would make great content (and a nice juxtaposition of this one). The idea that neurons create their own magnetic field is fascinating, some information on SQUIDs would be super interesting as their potential to detect magnetic fields as low as 5×10−14 (source wikipedia) completely encompasses the range of magnetic fields produced by organisms. Their (SQUIDs) usage in Magnetoencephalography as well as their use in oil prospecting, mineral exploration and earthquake detection I think would make for an amazing video at least in my opinion.

[@ahobimo732]

As soon as he mentioned Japan, I knew this would be the magnet that exploded.

[@ashleyobrien4937]

12:07 Such a device is called a FCG, or Flux compression Generator, and this channels example is well, a little incomplete. These things are NOT useless or impractical as the host seems to say, they are in fact VERY useful. In proper FCG's the initial seed current is often supplied by a special bank of very fast discharge capacitors, then actually speed of getting the current into the armature, or winding, is opened and closed with explosive switches, single use devices obviously, but that's just the start. The armature that then holds this brief current is then often also made to shrink or compact again using explosives, this drives the current very high and is often times in the tens of millions of Amps. This brief intense pulse has many applications, one of which is military, the EMP weapon. Basically this very high spike of current is used to drive what is called a VIRCATOR, which is effectively a microwave magnetron on steroids, the cathode is virtual, it creates the high microwave power output, the output is directed via a metallic cone over a certain area, and the microwaves effectively fry any unprotected electronics. such a weapon is of course single use, it destroys itself upon pulse generation. The Americans and Russians have done a lot of research on these things, and they are indeed very real. Better than using a nuke.

[@lazytommy0]

Super neat! I love electricity and magnets

[@jeroendenhertog4975]

I work with magnets: I stick them into aluminum chambers (with the right polarity oc.) to manufacture high frequency ribbon drivers (speakers). This can be quite risky, especially when the magnets are sorted out waiting to be processed, and a wrong movement with one of them causes a huge magnetic cluster, and if no luck bloody fingers too. I'm now used to handle it, but a small incident can cause a huge mess where all the magnets are attracted to each other, and some exploding in the process due to the great force of impact.