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

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

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.

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.

Love me a good Brainiac vid 🙂

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

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

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

Great demonstration 👍

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

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)

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.

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.

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

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

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

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.

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.

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?

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

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

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!

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

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

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

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!

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

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

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

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

My thanks for keeping the monster magnet tradition alive

I needed a new Braniac video tonight, thanks!

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

Your videos are so neat 😮 Love your hobbies 😅

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

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?

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!!!

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

Excellent video as usual. Also I

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?”

Thought so. Excellent videos by the way.

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)

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

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

This is why I subscribed! LOVE IT!

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

Excellent video as always!!

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.

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

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!!

Quite impressive and, in some ways, counterintuitive.

I kinda wonder a bit if the part of the aluminum moving so slow is also because it lighter than the copper and silver.

Amazing video as always

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

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

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.

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

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

Really, reeeeaaally interesting Video! 👍😀

I'm guessing aluminum is the slowest despite being the worst conductor. Due mostly to it being significantly lighter.

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

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

The magnet seems to have a sticky aura.

Very fun video, thank you!

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

I remember in high school physics when the teacher had an AC coil at the base of a 1m steel rod perpendicular to the demonstration table. When he placed an aluminum ring around the steel rod it fell and rested on the top of the coil. When the power was switched on the ring rose 15-20cm off the top of the coil and danced in the alternating field. And it got quite hot.

Nicely done 😎

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

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

next video idea: buy DP-75 Rottengenmeter (working or dead and make other video repairing it) and make extreme test of it

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

Magnets are just fascinating... I never get tired of playing with them. I've spent countless hours trying to wrap my head around how they work. I'm convinced that whenever science can completely explain magnetism the worlds energy problems will be solved.

This video was strangely relaxing... 😲

the aluminum rings look like HDD spacers that go in-between the platters

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

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

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?

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?

love ur vids keep it up!

Awesome as always!

Monster Magnet? I didn't see a single space-lord mother mother in this video.

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 :)

i like that copper bar!

I don't know what the deal is with Pepsi cans, but they have been using steel for 30+ years. We used to pick up cans to take to the recycler when I was a kid, and the conveyer belts at the recycling facility had strong magnets on them to attract and discard all the Pepsi cans. I think there were other brands, but everyone knew that Pepsi were no good for recycling (for aluminum prices anyway).

New video with the monster, Exciting!

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?

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

noo! i was so sure it would be copper or silver, i didn't think about how light aluminum is. oh well! definitely will remember this the next time i hear someone say aluminum won't react to a magnet

I love the effects of magnetic eddy currents Lol *I wonder how the electromagnetic force behaves in space, on massive scales, and really small scales?" Maybe we don't understand how massive things the scale of Galaxies behave? *I really wonder if Electromagnetism plays more of a crucial role in many different aspects of the Universe then we currently understand? Gravity, such a important aspect of nature yet seems like we don't understand "all the details about it yet" (In the form of a analogy) it really does seem like aspects of Gravity share similarities with the electromagnetic force. -Like Static charge's act upon small dust particles & allow them to acquire mass to begin gaining density. We can't have light/radiation, electricity without the electromagnetic force. The strong nuclear force seems to share similar charge behavior as well, so does chemistry. It uses +/- charges to bond compound's. I wonder if these aspects of Nature have more of a connection than we currently understand? Maybe things on different levels, strengths, size's, scales, could alter the behavior of a force we already know about. Maybe just certain things are needed, Such as temperature, density, pressure, velocity/rotation, energy/frequency/vibration, viscosity, etc. Think of how star's are created after enough mass is acquired? Radiation, light, magnetospheres, rotational velocities. They all are so crucial to Nature and all require aspects of the electromagnetic force for it to even exist.. look at a graph that shows the levels where different materials transition into different states of matter: maybe their are threshold points of (density, rotation, heat, atmospheric pressure, etc.) It's just a gut feeling I have after watching tons of science videos covering the behavior of the Universe around us. (the only way we can obtain growth and learn the things we are right about and the things need slight adjustment on? Is to be willing to allow ourselves to be open and thinking from all perspectives even on things we think we already know about.

I didn't know Al was playing hard to get! 2:54

1:19 German export goods, I live near the border and it is amazing how many danish people cross the border to buy alcohol, sweet and fatty stuff due to the high taxes on it in Denmark. Thanks for supporting our local economy :D

Cool but would like to see a gold cylinder react to magnets

The weight of the aluminum cylinder compared to the copper cylinder affects the rate of roll.

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

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

I expected violent puking at 5:16

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?

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

Aluminum, copper, and sliver not magnetic metals but still have an effect by magnetic due to eddy current effects and Lenz law. It's pretty cool that those metals are not magnetic but still have some effect by magnet. Wondering titanium and tungsten have same effect like Aluminum as those metals also not magnetic.

The main thing I learned is that there are steel soda cans. Who would have known!?