Monster magnet meets aluminum can...

Рет қаралды 346,075

Жыл бұрын

Is aluminium magnetic? The simple answer is no. But in this video, I will show how aluminium actually will react in two different ways to a magnet.
Using strong magnets and sensitive setups, even soda cans will have visible reactions. Do you know both of them? And can you guess which element will roll off a magnet the slowest: Aluminium, copper or silver?
200x50 mm disc magnet, 50 mm sphere magnet and one of the 150x50 mm disc magnets donated earlier by www.magnetportal.de/
My Patreon-page: / brainiac75
Old video of mine on eddy currents: • Eddy currents ad libitum
Old video on how to improve eddy currents experiments: • How to improve eddy cu...
Did you miss one of my videos?: / brainiac75
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#Magnet #SodaCan #DrinkCan

Пікірлер: 320

@theschnilser7962 Жыл бұрын

That last experiment was so awesome! Edit: Aren't these wooden wedges the same as in the old video combining two monster magnets?

@the_undead Жыл бұрын

Those wedges are the one you used to combine the two monolith magnets, not the used to make the 6x4 monstrosity

@agranero6 Жыл бұрын

Nicely done. i was tired of TLDR versions that basically drop a neodymium magnet inside a copper tube. At last a comprehensive explanation that even in physics lab classes at college level is sometimes overlooked. Very well done.

@LondenTower 11 ай бұрын

When braniac75 is better in showing physics stuff then schools, that's when you know.

@QuitebrokeN Жыл бұрын

Magnets are the closest thing we have to Magic, awesome video.

@SeanCMonahan Жыл бұрын

My dad had some small, powerful magnets, and it was fascinating dropping them down the tube of an aluminum foil roll. It was like magic how they slowly tumbled through.

@nathanfisher6925 Жыл бұрын

did you have to wrap a lot of layers, or is just one or two layers of foil enough?

@koszuta Жыл бұрын

Love me a good Brainiac vid 🙂

@brainiac75 Жыл бұрын

Thanks for the early watch, Nate :D

@LondenTower 11 ай бұрын

Same here.

@katranian Жыл бұрын

would like to see more of these myth-busting vids!

@EdgarCorona Жыл бұрын

Pure classic Brainiac magnet demos! Great stuff, thank you.

@yeetmcmeat Жыл бұрын

I will never get tired of magnets/magnetism. it seems like such a strange force but it effects everything differently.

@Lemayase Жыл бұрын

KZfaq shows me less and less of your videos so I make sure to binge them whenever it shows me a new one. Always fun to watch. Never change.

@qpn6ph9q Жыл бұрын

Great demonstration 👍

@brainiac75 Жыл бұрын

Glad you like it, Lexmax. And thanks for the early watch :)

@oswith972 Жыл бұрын

I've never seen an iron/steel drink can before, that's pretty interesting

@redcastlefan Жыл бұрын

I love how he changes how he pronounces aluminum every other time

@dougaltolan3017 Жыл бұрын

I missed that. If I'd noticed, I'd have beenistening for alumium, another name it has had.

@CatsMeowPaw Жыл бұрын

Awesome video! Demonstrations I've never seen before. This has a real world use familiar to coin collectors. Magnetic slides made of rare earth magnets are used to test coins. A silver coin will drop slower than one made of copper or brass. It's a great and quick way to test for counterfeit silver coins.

@tommiller1315 Жыл бұрын

Historically, a mechanical speedometer had a magnet rotating in close proximity to an aluminium disk. The ability of the disk to continuously rotate, was restricted by a spring, so as speed increased, the pointer attached to the disk would only turn as far as the tension exerted on the spring, thus indicating road speed (plus around 10% due to a legal requirement 🤣). (An early "Smiths" clockwork speedometer, worked without magnets, possibly due to patent requirements)

@juhajuntunen7866 Жыл бұрын

And then bearings wear and magnet start to touch alu disk, needle vibrating like crazy

@tommiller1315 Жыл бұрын

@@juhajuntunen7866 🤣 You don't look your age 🤣 Often, the flexible drive from the axle broke, and there was no longer any indication of speed!

@dh2032 Жыл бұрын

@@tommiller1315 and the constant up, down, just before broke, would not of been helping

@paradiselost9946 Жыл бұрын

My lil cup bearings gummed up. Spray it with wd40 on the odd occasion i felt like digging, have a speedo for a week. My new bike? No abs, no speedo sensor... its on the engine speed, like most cars etc run off the gearbox. Means i cant change sprocket ratios :( Hate new stuff. Gimme things i can fix!

@sherrymaloner8843 Жыл бұрын

Always a joy to watch new stuff from you! 🥰 Do you have any plans of exploring superconductivity, or would that be too financially and safely intensive/complicated to try?

@dhruvjain4946 Жыл бұрын

Great demonstration .. thanks for the knowledge...👍👍

@anthonysmith9864 Жыл бұрын

So cool. Ive always been fascinated with magnets since i was little and they still leave me in awe. Your videos are so valuable. I love learning new things. Thanks for this and i cant wait to see more!

@simonfox_8559 Жыл бұрын

Would be interesting to see if lubrication changes the end results, if friction plays a role or not

@MAGGOT_VOMIT Жыл бұрын

LoL!! The flame was like, "Go on!! Leave me alone......stop it ya big bully!! ". 😂

@BeigeAlert Жыл бұрын

Back in the day we were decommissioning a 7T superconducting magnet so I took the opportunity to stick a chunk of aluminum into the bore and that was a lot of fun. Also when in service pushing the evacuated metal tube of the FT-ICR into/out-of the bore was an exercise in patience, but a free hand-held aluminum block was a more dramatically weird feeling.

@ronsku57 Жыл бұрын

Yee a new Brainiac vid! These videos are always so well made and i always learn something new! Thanks for making these videos!

@calabrais Жыл бұрын

I needed a new Braniac video tonight, thanks!

@volvo09 Жыл бұрын

I had no idea there where steel soda cans. I heard some sodas can attack the aluminum more, but i thought that was solved with a liner spray.

@brainiac75 Жыл бұрын

I have no idea why some German soda cans are made of steel... They are all made of aluminium in Denmark. But you're right, they are (all?) lined with a lacquer to prevent chemical reactions. Thanks for the early watch!

@rich1051414 Жыл бұрын

Both have liner spray, but you can slightly taste steel cans from the exposed steel where you drink from. I actually like it though.

@guyh3403 Жыл бұрын

Since the 1935's all cans were made out of sheetsteel (iron with a bit of carbon) if I recall correctly. Mostly due production capability's. In 1965 aluminium soda cans were slowly introduced.

@SuperShecky Жыл бұрын

The last time I encountered steel soda cans was in the US Midwest in the late 1980s, a generic supermarket brand used steel cans, and seemed to transition to aluminum by the early 90s.

@volbla Жыл бұрын

@@guyh3403 I assume then that the current supply comes from someone using old production equipment that hasn't broken yet. I once tried to understand which material is cheaper and why. I _think_ what i found was that raw iron starts out cheaper since it is more abundant, but aluminium is much easier to work with, so the more refinement steps there are in your production line, the cheaper it becomes to use alu over steel.

@TheGiantHog Жыл бұрын

I love your channel so glad I found it, I'm learning so much. I especially appreciate the clues you give, like on the bottom right at 6:57

@carlsoll 6 ай бұрын

Your videos are so neat 😮 Love your hobbies 😅

@martynridley3671 Жыл бұрын

I first realised this effect when, as a kid my Dad would let me loose on a pile of old scrap cars, and armed with screwdrivers, pliers and an adjustable spanner, I would strip out all the jewel lights, switches and gauges. I stripped out many speedometers and discovered that the cable turned a pair of magnets on an armature which were in very close proximity to an aluminium disc which had a clock-like spring attached to it and also the indicator needle. Fascinating! That was 53 years ago, now!

@stevenjones8575 Жыл бұрын

Conductivity per unit mass would be an interesting metric! Seems like aluminum would be near the top.

@fabianradakovitz9064 Жыл бұрын

It is which is the reason its used in overhead powerlines

@xaxabdo 11 ай бұрын

@@fabianradakovitz9064 True, but its not that much used because of weak mechanical strength. But we already have a solution for that with alu conductor steel reinforced cables.

@tornado3842 Жыл бұрын

My thanks for keeping the monster magnet tradition alive

@spinnirack3645 Жыл бұрын

I am here to judge KZfaq's recommendations Good background music Good voice Decent visual examples Very slow video that only covers one or two simple concepts 3.5/5 Worth my time

@w1111-vs3dd Ай бұрын

Why didn't you just say 7/10

@TheOrganicartist Жыл бұрын

Excellent video as usual. Also I

@kornelijekovac9793 7 ай бұрын

4:24 Do you have a measureing scale to put below the magnets? Does it's weight change while slowing down the aluminium plate?

@Oicu8 Жыл бұрын

This is why I subscribed! LOVE IT!

@garrettord3304 Жыл бұрын

Today I learned that Silver is a better conductor than Copper.

@Spamista Жыл бұрын

:v Learned that thanks to the audio world.

@brainiac75 Жыл бұрын

And some think gold is the best conductor of all, but it is only a little better than aluminum... Thanks for watching!

@danl6634 Жыл бұрын

@@brainiac75 but gold terminals won't corrode anywhere near like how copper or silver, hence gold plated terminals all over.

@daGama1915 Жыл бұрын

Physicist here. If one day I become a professor, I'll use your videos

@StormBurnX Жыл бұрын

Excellent video as always!!

@JoonasD6 Жыл бұрын

I have absolutely never in teaching physics for about 15 years heard that it would be a "common misconception" that eddy currents would always cause repulsion. The idea that opposing (in Lenz's law sense) would get mixed up with physical repelling is something new to me. :S Is this a cultural, local or language thing? Has this misconception been studied in scied publications?

@snakezdewiggle6084 Жыл бұрын

Always a pleasure to watch your videos. Thank you. ;)

@OP-Lifter Жыл бұрын

love ur vids keep it up!

@Waterdust2000 Жыл бұрын

Nicely done 😎

@richardandrews573 Жыл бұрын

Thought so. Excellent videos by the way.

@alierengam1749 Жыл бұрын

Amazing video as always

@zdog90210 8 ай бұрын

Does electromagnetic induction occur when the can floats towards the stationary magnet creating almost like a feedback loop

@MahBor Жыл бұрын

The floating on water experiment might not work that well. The styrofoam usually gets "attracted" to the edge of the water by itself. I believe it's because of waters surface tension

@nathanfisher6925 Жыл бұрын

where did you get those three cylinders from? also, were any of then coated to prevent tarnishing?

@josefmazzeo6628 Жыл бұрын

Excellent video. I haven't seen any stainless steel soda cans but now I will pay attention. I've seen another video quite some time ago where the vlogger demonstrated the diamagnetic properties of a MOUSE - a real live one.

@_BangDroid_ Жыл бұрын

Awesome as always!

@neilfarr5727 Жыл бұрын

QUESTION... The last experiment, using the three samples are affected by the weight of the samples, although the copper and silver are similar in speed despite a weight difference. Could you try in a future video using the rare earth magnet on a pendulum between two blocks of silver/copper/aluminium to see the eddy current braking effect when the moving item is the same between them? The gravity effect is cancelled as the moving item is the same, but the density of the metals would be different (as well as the conductivity). GREAT VIDEO BY THE WAY!!!

@xenuno 4 ай бұрын

Would also be good time to introduce the reason for laminated construction rather than monolithic solid blocks for some applications

@pfuisi Жыл бұрын

Thanks this experiments were awesome. I guessed it wrongly - didn't account the weight difference. Again what learned.

@yaseenaljanabi1338 Жыл бұрын

keep on the good work man i love your video's 😉

@Chris-ut6eq Жыл бұрын

Very fun video, thank you!

@bbbenj 9 ай бұрын

Quite impressive and, in some ways, counterintuitive.

@soremuss Жыл бұрын

I can't imagine being bored with you around, people in my life are very uninterested in interesting things like these. 😢

@jimleane7578 Жыл бұрын

Excellent vid. When rolling the cylinders, did anyone notice an increase in speed through the centre of the magnet, and only a slight decrease in speed on the trailing edge. (I'm thinking this was due to increased momentum through the centre)

@MrTconquest Жыл бұрын

Brilliant, thanks 😊

@-Tris- Жыл бұрын

The rings look like they came out of HDD's. I have a couple of them myself 😊

@volvo09 Жыл бұрын

I recognized that, haha

@brainiac75 Жыл бұрын

Well spotted, they are indeed :D Thanks for the early watch.

@nathanfisher6925 Жыл бұрын

@@brainiac75 that got me to thinking, those should fall slower, then I realized the upper part of the ring is a lot farther from the magnet, and so the square law is raining on the parade. And THAT got me to wondering just how much the diameter of the cylinders is affecting the test. Someone in another comment asked about racing an aluminum cylinder of the same WEIGHT as the copper one, and that's what I was thinking... the larger diameter should lower the diamagnetic repulsion farther from the magnet? But I think at that point the math is getting very ugly and a plain test would be the fastest way to get an answer. Maybe if the LENGTH of the aluminum rod was made bigger without changing the diameter? But THAT got me wondering how things compare at different places on your crazy magnet. It's strongest in the middle right? So a long cylinder may not be fairly compared to a short one?

@Zennsunni Жыл бұрын

Where do you get those big magnets, does anyone have a link or anything I want to get a couple

@ramrod126 Жыл бұрын

Every time I hear the word eddies all I can think of is this "'Eddies in the space-time continuum.' 'Ah...is he. Is he.' 'What?' 'Er, who is Eddy, then, exactly?”

@mylastaccountgotdeletedtha6936 Жыл бұрын

“MAGNETS!” -somebody on Breaking bad, I think.

@sschmachtel8963 Жыл бұрын

Nice aspect that Aluminium was moving down slowest on the magnet. Not something that one would expect. Is this also true for an eddy current seprator?

@sulfie46 Жыл бұрын

New video with the monster, Exciting!

@brainiac75 Жыл бұрын

Yep, they don't come that often ;) Thanks for the early watch, sulfie!

@petef.4361 9 ай бұрын

I have a question, is there such as thing as an electromagnet that can be purchased anywhere on the internet that can pickup aluminum, specifically an aluminum can? I know that some garbage dumps have special eddy current separators that cost tens of thousands of dollars, but I am looking for something that is small that is battery powered, or can be powered with 120 AC, or with an AC power supply that can pickup a can. Does anything like that exist? I already found electromagnets on the internet that are cheap, and they use AC instead of DC, but I have no idea if they work on aluminum. Maybe such things are not possible to create?

@sinisterthoughts2896 11 ай бұрын

Dang, i was just going off of conductivity and guessed silver.

@jtveg Жыл бұрын

Thanks so much for sharing. 😉👌🏻

@JustPyroYT Жыл бұрын

Really, reeeeaaally interesting Video! 👍😀

@brainiac75 Жыл бұрын

Was interesting to make too! Finally, I understand eddy currents 'opposing' nature :)

@Percussionfirema Жыл бұрын

so interesting, Thank you

@victoryfirst2878 Жыл бұрын

How about taking the three different metals being with porosity like swiss cheese affect the magnetic roll on the magnet Sir ???

@WaffleStaffel Жыл бұрын

Magnets are used to sort aluminum in recycling plants. The large motorized spinning magnets fling the aluminum off the conveyor belt.

@GlenHunt Жыл бұрын

I would love to see someone make an eddy current slip-n-slide

@josefmazzeo6628 Жыл бұрын

Or an elevator, as a safety mechanism.

@adrleao15 Жыл бұрын

Great video, thank you. In the last experiment, gravity was mentioned a couple of times, but how does it affect it, by means of friction?

@florentin3141 7 ай бұрын

Well I think, the idea is to look at the forces on the cylinders. If you use a very basic model for the friction (lets say it is equal to the normal force to the surface times some constant) we could say the the accelerating force is sin(a)m*g (a being the angle of the magnet, m the mass of the cylinder) and the force due to friction is some friction constan b times the normal force = b * (m*g*cos(a)+ c*v). c being some constant for the specific material (due to conductivity, v being the speed at which it rolls down, rememberg that the current depend on the change of magnetiv field and only occur when it rolls). Alltogether we got something like F_total= sin(a)*m*g-b*(m*g*cos(a)+c*v). Now you can see that, if you divide by the mass to get the acceleration, the "negative" acceleration from the eddie current is proportional to c/m. With smaller mass it gets larger and with bigger conductivity it gets larger. Since the factor by which the aluminum is lighter then copper and silver is bigger than the factor by which its conductivity is smaller, you see what you see. Sorry if this is not very compact :D

@lasersbee Жыл бұрын

Very Interesting... Some new info to store in my already crowded brain..

@mathias1074 Жыл бұрын

En ting jeg altid har tænkt på er: Hvor og hvordan i alverden opbevarer du dine store magneter? Fordi de helt store magneter må da kunne give problemer med andet elektronik eller lignende. Elsker at se dine videoer. Bliv ved med det :)

@ChiseledDiamond Жыл бұрын

Kan du ikke engelsk?

@mathias1074 Жыл бұрын

@@ChiseledDiamond jo hvorfor da?

@brainiac75 Жыл бұрын

I nogle store kasser, så man ikke kan komme helt tæt på dem: kzfaq.info/get/bejne/r7Nki8hjyJamaIE.html Magnetfeltet aftager meget hurtigt med afstanden, så de er relativt harmløse på omkring halvanden meters afstand. Flere videoer på vej. Overvejer at lave en kasse med magnetisk skærmende mu-metal plader indbygget ;)

@mathias1074 Жыл бұрын

@@brainiac75 Spændende. Kunne ellers godt forstille mig at det havde været farligt hvis de ikke var pakke godt væk. Men det lyder også som en god ide med nogle kasser med magnetisk skærmning. :)

@SeanCMonahan Жыл бұрын

@@brainiac75 I've wondered if it's possible to build something like a Faraday cage but for magnets. I did some reading, and it does seem like you can use a metal box to "guide" the magnetic field lines, limiting how strong the magnetic fields are outside, but not to the same degree as a Faraday cage can with EM radiation. I don't have a solid grasp on the physics of it though, so I'd love to see any video you make about your experiments with storage boxes for your magnets!

@BoHolbo Жыл бұрын

There are way too many people out there, that are completely oblivious to the fact that in addition to magnetic (ferromagnetic) and non-magnetic materials, there is also the existence of diamagnetic, and paramagnetic elements & compounds. There is a whole world of exciting things to explore, more than one person can ever experience in a lifetime. There is no time to waste!!

@justinpatterson5291 8 ай бұрын

I was SO wrong about which one would be slowest. I thought copper would hold the title due to its ability to conduct electricity. Never guessed aluminium would be the winner. I also didn't know that silver was slightly more conductive than copper. Have you tried doing this with bismuth or some alloys?

@kdt85 Жыл бұрын

Monster magnet were a great band but I've never heard of aluminium can!

@Dr.-Smart Жыл бұрын

would be interesting if you could make a mono pole generator since you have such huge magnets !

@Tryggve92 Жыл бұрын

I thought you where going to say "Click like if you will chuckle the next time you hear: Aaawwww" xD Awesome video!

@Sergio_Loureiro Жыл бұрын

This video was strangely relaxing... 😲

@PragyAgarwal Жыл бұрын

Why should density affect the rolling speed? Both the gravitational acceleration and the rolling friction is independent of density. Could the difference be due to the surface texture?

@krabkit Жыл бұрын

while coper an silver produce stronger eddy currents, they have more mass working against those currents

@PragyAgarwal Жыл бұрын

@@krabkit ah.. ofcourse! That was simple. Basically the moment of inertia is larger for copper and silver. Thanks :)

@rizwanmalik3659 Жыл бұрын

Hi very interested. Can u make flame transistor .

@dehydratedwater9734 Жыл бұрын

How about if you move the magnets close to elements to see if when in a pushing movement what it registers on the scale and when pulling away if it registers it’s getting lighter.

@Mezz9009 Жыл бұрын

Should try the rolling experiment in a vacuum to see the effects of Eddy currents electrically discharging atmospherically.

@Purple431 Жыл бұрын

Silver is the most conductive to electricity and will have stronger eddy current effects in it when exposed to a powerful magnetic field. I wish it was used in home electrical wiring but unfortunately it's not as cheap as copper. I thought silver would be the slowest to roll of the neodymium magnet, odd

@br45entei Жыл бұрын

I thought the same, but I didn't take the relative weight of the aluminum vs the silver into account.

@NoodlyPanda Жыл бұрын

Me: I'll never need to know any of this for real life Also me: Fascinating.

@w1111-vs3dd Ай бұрын

You might. Say you're designing something that is inside of strong magnetic fields, or being careful that your aluminium can doesn't melt into molten aluminum when it's near an inductor

@liliwinnt6 Жыл бұрын

i like that copper bar!

@yeet1337 Жыл бұрын

Would you be interested in a (semi) DIY gamma spectrometer? Saw your radioacitvity-related videos and I liked the Radiacode-101 review, so I think this would be a possibly fitting video ;)

@libyatube2651 Жыл бұрын

Questions: Which one is better conductor in extreme weather as to much heat or cold?

@medhavidev7834 Жыл бұрын

Where do I get that gaint magnet

@davidd2661 Жыл бұрын

Isn't there also a golden spot in internal resistance of the material, so aluminium is a bit worse conductor than tho other two, weighs less and that's helping it to roll slower?

@abpsd73 Жыл бұрын

Eddy currents and the induced magnetic field are what spin the aluminum disk in analog electric consumption meters.

@bob9483 Жыл бұрын

Could there be iron impurities in the aluminium causing the attraction?

@Mr1fish2fish Жыл бұрын

You should try a ratio of the densities beginning with the inclined magnet angle for the slowest time to roll off, and multiply the ratio of one greater density to the lesser or least density and multiply that ratio of densities times the angle of the slowest time, tilt the magnet incline to that new angle and see if the densities roll off the incline in the same amount of time each.

@TAKIZAWAYAMASHITA Жыл бұрын

Magnetism the easy way for us to create a literal tractor beam

@piconano Жыл бұрын

I had forgotten that silver was more conductive than copper. Silly me. Your big magnet seems to have magnetic bald spots or lacks uniformity. All 3 samples wiggles around the middle.