Euler's Disk

www.teachersour... -
Give Euler's Disk (pronounced like "Oiler's Disk") a spin and observe the hypnotic display of light and continually changing sound. The movement seems to go forever, spinning and precessing as it slowly transforms gravitational potential energy into kinetic. The concave mirror base provides an ideal reflective surface to see the visual effects. Amazing to use in a darkened room with a flashlight or laser.

[@HelloImATeapot]

Every time I drop some change in a library.

[@caelanton408]

That ... is damn funny! Genuine LOL

[@Jony3]

6 years later, Still laughing!

[@nikephorosmostropus4606]

Lol

[@JimMcBeam]

hahahahaha

[@rwelmer]

I need to hear a Drop after that kind of build-up...

[@DavidBoura]

;D

[@Eddie4you]

lol

[@40hzsquarewave]

kzbin.info/www/bejne/fJLadqeGZZpqmM0

[@snehashishbanerjee2575]

Looking forward to use this sample pack in my FL Studio

[@fiery271]

physics.exe has encountered a problem and needs to close.

[@031000ron1]

***** It certainly couldn't be done on OSX, things are too complicated for such an under-powered OS.

[@OrangeC7]

It runs on OSU. (Operating System Universal)

[@theduder2617]

I figured it out. The Universe: Windows and Apple had a baby using Ubuntu as a womb. Some things may not make any sense and seem downright ridiculous, but the math works out. lol

[@marcoszeidler7156]

@Willow Rose no no, the laws of physics stopped working

[@ordersquamata930]

String OS has encountered an issue.

[@BobWestWA8YCD]

It'd be cool to see an audio spectrograph (frequency vs amplitude vs time) of the sound.

[@trevormeyer2191]

Somebody get this dude a frickin mic!

[@jacksepticeye]

Oh God it's one of those videos where every comment is a top comment :O I need to make mine super cool so I am not the only one with no thumbs up. Aw screw it

[@carloscastilleja3550]

Woah this was 7 years ago, keep up the good work king

[@whattheheck6482]

wtf

[@N1CH0_N1N3]

Why I keep finding Seán's 7 years old comments in random videos?

[@JV-qr7ey]

Oh huh

[@midshipboot101]

:D

[@tiltedtesseract8210]

i like how the sound starts building up right at the beginning of the video, and near the end it keeps going up until it abruptly stops. how oddly satisfying.

[@DeepTelecast]

reddit.com/r/oddlysatisfying

[@tiltedtesseract8210]

PowCouse ...maybe o.o

[@Mewkityy]

the noise is so beautiful

[@jason4592]

It's the sound of nature.

[@humblehypebeast959]

you are beautiful uwu

[@marianaptks9933]

you should listen to some psy trance then i guess

[@superman55566]

I must return to my planet. farewell earthlings.

[@TheHadesShade]

The Sound that you keep hearing is quite amazing too!

[@IBeAMashedPotato]

Hyperengines engaging, prepare for jump to light speed.

[@revimfadli4666]

1:24 3D Space Cadet Pinball, anyone?

[@Reapertheripper469]

I loved it!!!

[@JungleToes]

I remember playing that all day xD

[@a_z-bruh]

YES!

[@mysteriousmemethief]

Wormhole be like peeeoowwruudududu

[@128ajb_02_Music]

I remember that! I’ll have to check an old hard drive to see if I still have it. Will edit the comment if I can find an emulator for it

[@Teachersource]

The concave surface acts, at first, to keep the disk spinning in one small area, rather than travelling across the table as a coin would. Beyond that, it is curved at such an angle as to reduce the contact that the disk has with its surface, reducing friction so the disk can continue spinning as long as possible.

[@Teachersource]

@MaskedGuardian0 It is a low-friction surface, and a very heavy disk with a beveled edge. There are no magnets, though a lot of people guess that there are. The slightly concave mirror helps with the conversion of potential energy to rotational energy.

[@hairdeerdsIJd]

When will the base drop?!

[@devilgene7330]

The last sound u hear before dying

[@midshipboot101]

DEFINITELY

[@ArsenioDev]

VVVVVVVVWOOOOMP! warp achieved captain!

[@shabadoo1]

CAN I PAINT HEADS AND TAILS ON EITHER END AND USE IT FOR REALLY LONG COIN TOSSES?

[@hesoyam881]

The thing isnt flipping constantly. Its spinning on one side.

[@Teachersource]

Exactly. Both the disk and the mirror are highly polished, very smooth surfaces. The disk also has a slight bevel so that as little of it as possible is in contact with the mirror as it spins.

[@foreverkurome]

I don't know why but every piece of electronic music I listen to now I can hear Euler's disk spinning in the background. it started up around 10 minutes after playing with it

[@Cohenski]

One of my teachers used to have one of these. It was really cool... but that one went WAYYY longer than his. That's truly insane!

[@childofthe60s100]

NOT "insane"!!!!! SCIENCE!!!!

[@felipetomaz1087]

​@@childofthe60s100SCIENCE IS INSANE 🙄

[@jayount]

idk why but when it stopped I busted out laughing

[@TheAbsoluteProduction]

0:05 - Me laughing 0:25 - My washing machine 0:40 - Helicopter starts flying 0:50 - Ak47 1:27 - Zipper

[@Revanox]

1:05 laser cannon charging up

[@filipadias5898]

God

[@filipadias5898]

U are so smart

[@christian_x]

0:40 'Nam flashback intensifies

[@HyperSpify]

The funny thing is the disk itself is actually slowing down over time, until it's hardly moving at all near the end, which can be verified by putting a dot on the disk and watching the dot move (or using a coin, which has clearly identifiable features). It's the point of contact with the base that moves faster and faster, and that's what's causing the sound.

[@casualbird7671]

Where's the Kaboom? There was suppost to be an Earth-Shattering Kaboom!

[@wccrispy]

This should be filmed and uploaded again at 60 frames per second since KZbin now has that option.

[@McGuffyFL]

I just got one of these. The sound and duration are real. There's no batteries or magnets. The disc itself is pretty heavy. It's pure physics; potential energy (lifting the disc to an angle) and kinetic energy (spinning it) and even a gentle spin will get 2+ min of rotation.

[@SteevanNas]

Imagine one of these in a classroom or work place. "sorry, dropped a quarter ... a minute ago"

[@cautiontext]

that was insane! I thought a worm hole was going to open up.

[@keyframeguy]

This would be my totem if I was in the Inception world. Dope

[@la_giulietta]

That’s insane 🤣

[@awfuldynne]

I was under the impression that the geometric shape is spelled "disk" (to refer to either an extremely shallow cylinder like a coin or even a zero-height cylinder) whereas the "disc" spelling indicates optical storage media with that shape. A quick search indicates that a lot of people say there's a difference, and a lot of people say they're largely interchangeable. Since "disk" predates "disc", the latter spelling sounds anachronistic when used outside IT.

[@zeuzzcazares]

there should be a bass drop at the end!

[@ThePieMan159]

The end where it stopped, could make an awesome dubstep drop!

[@BeardyMike]

1:15 for the good part.

[@elihersh2133]

I was listening to Streetlight Manifesto's Ungrateful while watching this and the spinning noises matched up with the song.

[@JordanMossy]

Euler?..... Euler?..... Euler?.... Euler?.... Euler?.... Euler?.... Euler?....

[@Kayayayaya]

You're pronouncing it wrong!

[@boyfromzambia]

It's pronounced YouBluer, I just don't know what I'm talking about...

[@Kayayayaya]

***** No, it's pronounced like "oil-er."

[@krillerthekiller]

love the sound at the end when it stopped.

[@andyyang5675]

Warp drives,engaged!

[@27lisalisa]

This literally made me so happy

[@Hannie.Schaft]

Whoever posted that into r/woahtube is my hero!

[@RS250Squid]

That was strangely satisfying.

[@KingChronoss]

This video made me stressed for some reason.

[@treasuredchaos7927]

yeah! My heart picked up pace!

[@soju69jinro]

i just wanted to push that piece down and get it over with.

[@hanchockelias5123]

The choppers are coming

[@dakheelalmutairi2715]

Same

[@spaceedementia]

I still feel a little anxious

[@Davecm008]

this is strangely mesmerizing and satisfying to watch

[@Merlinman2005]

Dude my heart was thumping so fast, waiting for it to shoot into the sky...

[@fisher00769]

This is the best dubstep song I've heard so far.

[@Mawsdtheking]

Can you touch it without breaking your finger?

[@MetaKnight23]

I hope thats a joke

[@ItsThatMilkshake]

Learn some physics

[@hbloops]

Of course you will break your finger, are you serious? The disc is spinning at v=100 m/s and the mass is about 1kg. This combined with its lorentz factor of 5.6 (due to 1/(1-v^2/c^2)^1/2) gives it a momentum of just about 3 meganewtonseconds which is by far enough to break a finger, maybe even your neck...........

[@DeepSpaceBass1]

Oliver Morgan For real?....

[@ItsThatMilkshake]

DeepSpaceBass1 No you idiot lol

[@captchaos83]

So that's what this is called. It's also used to measure annoyance tolerance in co-workers. :-)

[@MisterVelocity]

Anyone else think this was about to fire a death beam

[@zeppt00]

Well that was the coolest thing ive seen all day

[@RickRaptor105]

Here from Michael Stevens

[@turnsout689]

Such a warm guitar

[@SolidOberon]

If you close your eyes it's like a UFO taking off slowly.

[@VraiDave]

it's an action called either sprolling or spolling, i can't remember which, which is (you guessed it) a compination of spinning and rolling. the reason it last so long is that any energy lost to the spinning goes into the rolling, and vice versa. the mirror it rolls on is also slightly concave, which helps.

[@light370]

Thanks Reddit.

[@Adrolth]

This is a dream! The disc is still spinning! We're all living a dream!

[@venialjo]

D-D-D-D-D-D-D-DROP THE DISK

[@ianisc00lio]

was totally expecting the inception soundtrack to start playing right before it stopped

[@sjawoods]

......waiting for the bass to drop.....

[@geneeshays]

The way it furiously acellerated and suddenly stopped with no sound made me laugh out loud

[@benharris3433]

Rotation of the actual disk doesn't speed up, but if you were to monitor the single point of contact of the disc to the table towards the end that single point would be moving around very quickly.

[@hokie8585]

Thumbs up if Big Bang Theory brought you here!

[@mp-zf4ur]

This was perfect timed to my washing machine spin cycle. Damn it was awesome!

[@TheMGOotaku]

The end is so satisfying...

[@toposebi95]

That's some trippy sound effects.

[@OrionKaelinClips]

Wow, that SOUND!

[@RangeAhmed]

that was so satisfying to watch.

[@la_giulietta]

this sound gives me goosebumps

[@unrealengine1enhanced]

now this is my engine, in basic form. THIS IS AMAZING.

[@laith_iris]

I love how the sound stops suddenly

[@Zoumer]

Best thing ever. I need to buy this

[@kennethflorek8532]

At some time, it looks like the point of contact rotates although the disk does not. As the energy in the disk is lost, the rotation paradoxically increases. When it seems to be accellerating without bounds, it suddenly buzzes and stops. I am not sure if it is necessary to spin the disk to get this going. You've seen this when dropping a coin. I once saw this with a manhole cover when the person tried to set it on the pavement without trapping his fingers. It didn't last very long.

[@svelvikgutten11]

I could wach that all day

[@TheStoryForGames]

A TIME MACHINE!!! Back to to 80s !!!

[@thirstfast1025]

I hope I'm getting one of these for Christmas

[@klimacs]

Literally feared for my life there for a bit.

[@Teachersource]

They should be available right now, and we ship everywhere.

[@sfordforcz201]

BEST DUBSTEP EVER !

[@KamilDrakari]

I bet that would look really cool in slow motion.

[@RampDad]

This effect is not caused by the speed of rotation on the disc, but the speed of the wobble, The actual rpms is probably very disappointing. The concave mirror causes the the disk to wobble exponentially faster as it tumbles on the curves of the mirror, Really to reproduce this, you need a disc that has some weight and a curved mirror.

[@josephkingsley8708]

That is so strange to me. The laws of physics in my universe are quite different, and this would be one of those things we sort of take for granted. This type of motion is common place in our daily abouts.

[@Doggieman1111]

That's friggin sick

[@TheIngvill]

I seriously really, really, really want one of these! So awesome!

[@wardjm12345]

As it hits the surface and bounces up, it creates (in theory, not in practice) a finite time singularity. This is where the frequency between collisions with the surface reaches infinity in a finite time. However, the theory breaks down when the collision time is about the same as the time between collisions. I find it quite interesting (as a physicist, I should!), hope this helped. (FYI, the same effect occurs when you bounce a ping pong ball on a table, only it has less impressive results)

[@cybervigilante]

So that's how flying saucers make that sound. Good to know. ;') Actually, I thought the coin was going to stand up again. Not sure why but it seemed to make sense.

[@EstoyLigado]

I was just sort of waiting for it to blow up.

[@Potchi79]

That was intense.

[@daemonburns-waight2421]

I really like this.

[@kalloused]

Hendrik Ball got me to love Euler's Disks

[@AUDiLETHEOLOGY]

God, that was intense.

[@dalewebb1992]

I was waiting for a sweet baseline to drop towards the end.

[@supahewo2]

Legend has it that it is still spinning...

[@tootiefruity4youey]

this is where dubstep truly comes from

[@RolfMclaren]

Nice and sweet to my ears

[@NonMaya]

i was waiting for it to take off

[@stoopidhumor1]

Was waiting for the hardest drop ever

[@Andavane]

Brilliant!

[@a9bomb]

Using this to become the next Dubstep genius

[@skyreffer]

i was waiting for it to start hovering

[@oatmealian]

This is so intense!

[@moth.monster]

This is how they make those warpspeed sounds

[@Arastelion]

you sir, just won the internet :D