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Weird metal that's also glass is insanely bouncy


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  • Steve Mould
    Steve Mould  5 ай бұрын +1025

    It feels like a glitch in the matrix.
    The sponsor is KiwiCo: Get 50% off ANY crate kiwico.com/stevemould50

  • NileRed
    NileRed 5 ай бұрын +2341

    That was really cool. This has made me want to try and make one of these... If I succeed, I'll send you one!

    • Otherworldly YTP
      Otherworldly YTP 12 күн бұрын

      Yoo you’re the same guy that turned vinyl gloves and vanilla into hot sauce. Hey man 👋🏻

    • 3RR0RNULL
      3RR0RNULL 13 күн бұрын

      @Alex Hu it’ll probably be 4

    • Wilms
      Wilms 4 ай бұрын

      Amazing to see you here, love the channel

    • Cameron McCarty
      Cameron McCarty 4 ай бұрын +3

      Makes me wonder if you could make a ping pong paddle surface out of amorphous metal.

    • your_local_furry_hater
      your_local_furry_hater 4 ай бұрын

      Can you collaborate with electroboom to make something dangerous?

  • MalcolmTroon
    MalcolmTroon 3 ай бұрын +575

    I can say from personal experience that a steel screw dropped onto a tile floor has a coefficient of restitution of at least 1, and this coefficient value is proportional to the rarity and cost of the screw.

    • TheDirtMan
      TheDirtMan 5 күн бұрын

      @Tim Elsen In a theoretical world where 1 isn't the upper bound, it would bounce higher than the height it was dropped from, if the coefficient of restitution was 2, and you dropped a ball from 10 meters, it would bounce up 20 meters. However this theoretical world is what you are transferred to when you drop one of these rare screws and the screw bounces for eternity somewhere in your workspace.

    • Tim Elsen
      Tim Elsen Ай бұрын

      1 is the upper bound!

    • Epä Järjestys
      Epä Järjestys Ай бұрын

      @Lyxe It was a joke, but I did not understand it either.

    • Lyxe
      Lyxe Ай бұрын

      It can't be more than 1

    • Fred MacMurray
      Fred MacMurray 2 ай бұрын +4

      I don't think you fully appreciate the results of your "research". The sample screw has a post impact path at an angle to the original line of travel. This requires more kinetic energy than the system has before the collision. You are describing a type of hot fusion.
      I say it's hot fusion since that's what you become after the screw disappears. And, to distinguish this phenomenon from plain old hot fusion it's spelled Fyousion.

  • Ian Jardine
    Ian Jardine 3 ай бұрын +243

    As an engineer we call the balls ball bearings and the assembly simply a bearing. As a bearing consists usually of an inner and outer bearing run with the bearings working between being ball bearings needle bearings tapered bearings ect.

    • Call_Me_Madu
      Call_Me_Madu 4 күн бұрын

      @cr Maybe, but they are pretty spherical in general , that wasn't my point in the first place, in your logic there aren't any soccer balls because they aren't perfect spheres, i mean hell nothing is ever a ball, it's impossible to get anything to be a ball, just very close to it. So we use the word "ball" for conveniece.
      And if you measure ball bearings from roller bearings with something like a micrometer, you will see that they are very very equal on all sides, the taper is indistinguishable to the human eye.
      I think you got confused with tapered roller bearings or maybe some other type of bearings, but your typical roller bearings which are angular contact roller bearings and deep grove roller bearings pretty much have balls inside of them.

    • cr
      cr 5 күн бұрын

      @Call_Me_Madu Um, no, roller bearings have cylindrical (or sometimes slightly tapered) rollers in them, never balls. There's even 'spherical roller bearings' which have barrel-shaped rollers in them (so-called because the envelope of the outside of the barrel rollers forms a virtual sphere, so they're tolerant of misalignment), but not a ball anywhere in sight.

    • Call_Me_Madu
      Call_Me_Madu 14 күн бұрын

      @Reid Prichard Well i guess each to their own, but having 2 things having the same name confuses me a lot so i like to seperate them in my own way

    • Reid Prichard
      Reid Prichard 14 күн бұрын +1

      ​@Call_Me_Madu hmm, when I hear "roller bearing" I think of cylindrical/tapered roller bearings.

  • Mike Ballew
    Mike Ballew 3 ай бұрын +30

    I've never been so sincerely interested in a bouncing ball before

    • daddy7860
      daddy7860 3 ай бұрын +1

      It would be even more exciting to watch paint dry... on the molecular scale... timelapsed

  • Snowmunkey
    Snowmunkey 5 ай бұрын +59

    One think you should look into for further improvement is to place the rig on an anvil or some other very large hardened steel thing. fun fact, blacksmith anvils are commonly tested for their quality by bouncing a ball bearing and seeing how high it bounces the ball back up. The higher the bounce, the better it will be to forge on.

    • Gregory Ford
      Gregory Ford 3 ай бұрын +2

      That’s for the same reason as this. Highly crystalline metals are brittle, which is bad for an anvil.

  • Kelly Grant
    Kelly Grant 5 ай бұрын +44

    When the frame rate makes the bearings appear to hover is so cool! Bouncing in and out of the plane of focus is really cool too. Well done. You look like a week off is in order.

  • Adam Smith
    Adam Smith 5 ай бұрын +12573

    Ah! You should've tested the smaller ball bearings again in the vacuum tube, as they were most affected by air resistance.

    • Cheetah
      Cheetah 13 күн бұрын

      That’s exactly what I was thinking!

    • Dean Fielding
      Dean Fielding 20 күн бұрын

      Just thought exactly the same!!!

    • Verdations
      Verdations 28 күн бұрын

      Thanks for saving my time I thought that’s where he was going with it

    • Ethan Chapman
      Ethan Chapman 3 ай бұрын

      I think the square cube law would still come into play

    • Beaten and Torn
      Beaten and Torn 3 ай бұрын

      Damn, I think I walked in on nerd con

  • Benj FitzPatrick
    Benj FitzPatrick 4 ай бұрын +31

    Would you be interested in using some of the sound files and measurements to calculate the gravitational constant? Not only could it be a relatively cheap way to calculate g, I am curious if it could measure the gravity gradient by performing the bounce tests at various heights.

    • GrilledCheeseSandwich
      GrilledCheeseSandwich Ай бұрын

      You're going to have to assume that the collision time (the time the ball bearing spends in contact with the surface) is constant, which might introduce some error.
      A second source of error will be due to the sampling frequency of the audio stream.
      You could probably get a pretty nice value out though.

  • Bttrpeach
    Bttrpeach 4 ай бұрын +5

    If you are testing number of bounces again, samplers like the one in Logic Pro x can easily tell you by loading in the audio file and using transients/peaks as the metric that decides chops/divisions. then it will may tell you how many it was able to locate (dependent on the software it should show up pretty apparently, I know logic’s quick sampler does)

  • Mataclysm
    Mataclysm 5 ай бұрын +13

    That was genuinely fascinating. I found myself dying to see it tried in a vacuum, until you hit that very subject. XD I think you would have gotten a more dramatic difference with the smaller balls in a vacuum if, as you said, air resistance was the main factor limiting them.
    I went looking for the Caltech paper to see what the final alloy was and found the simulations they ran to find the best conditions fascinating as well, and slow-cooling molten alloys in a centrifuge at 60,000 g kind of broke me for a second.

  • Tim Elsen
    Tim Elsen 3 ай бұрын +2

    I feel like I learn more and tire less, watching Steve than anyone I have ever listened to. Supremely fascinating! Kudos to Mehdi as well!

  • Justus Patrick
    Justus Patrick 3 ай бұрын +4

    I think you might have stumbled upon the secret to the euler discs. The sound the ball makes when it's almost done is similar to the disks when they are almost done. Idk worth looking into though

  • Felipe Henrique Santa Maria
    Felipe Henrique Santa Maria 5 ай бұрын +2885

    Hello Steve!
    Wow, what a great video! 👏
    I'm a researcher, and I'm coincidentally finishing my PhD in this research field. We used to call it Bulk Metallic Glasses (BMGs), or just metallic glasses, as you mentioned.
    In all these years that I've been studying this field, your way was one of the most interesting to present the public that I've ever watched. I'm so happy to see something I study being presented so well to so many people due to the high visibility of your channel! It made my day!
    You commented on the possibility of someone sending you spheres also made of metallic glass (and yes, you are correct, it would be the ideal way to maximize the bounce time). In the laboratory where I work, we usually produce several amorphous metal alloys, the biggest difficulty is only in the spherical shape, since to get an amorphous structure, as you said, we need a certain cooling rate, and that's why we suck our samples to a chilled mold.
    I am already in contact with my advisor, so that we can study the possibility of producing this type of spherical samples and send them to you!
    Hope this message reaches you! (Help me with a like guys!)

  • Greg Roberson
    Greg Roberson 3 ай бұрын +43

    Perhaps someone else has mentioned this but I noticed that no where in the video did you mention the sound itself as an energy leak. When you created the vacuum test, the sound was quite apparent meaning that each bounce sent a compression wave through the metal disk, then the base metal cylinder, then the brick, then the metal plate, then the air gap, then the microphone. That has to be a major loss of energy, possibly more that any from air resistance.

    • Fred MacMurray
      Fred MacMurray 2 ай бұрын

      You are correct sir. In terms of entropy the base is at a state of rest and the ball is at an energy level higher than it's resting state. Energy will go from higher to lower. So the impact energy transfer will be many times higher than the energy transferred to the air. The ball shaped also contributes to this.

    • Barbeqdbrwniez
      Barbeqdbrwniez 3 ай бұрын +5

      While he didn't specifically point out the sound as energy loss, he did reference the different energy losses based on the base that it is on.

  • Chris Wood
    Chris Wood 5 ай бұрын +3

    I am amazed by how we could hear the bearing hitting the plate in the last trial with the partial vacuum. Our ear is sensitive enough to detect the vibration through the plate and substrate metal to the brick which vibrates and in doing so compresses the air and sends waves of compression to our outer ear which channels and amplifies these waves to our inner ear and so into our brain so we can 'hear' the vibration. Incredible.

  • Planty Pete
    Planty Pete 4 ай бұрын +1

    GrandIllusions is one of my favorite channels. Awesome to see their own atomic trampoline in your video Steve!

  • Simi R
    Simi R Ай бұрын

    The nerding out never ever ends in this one, I love it, very satisfying.

  • Charles J Gartner
    Charles J Gartner 4 ай бұрын +1

    you should do one on spinning tops. I have a brass one with a ruby tip that I hit 14 minute spins with on a slightly concave mirror. I was always trying different things to get better times. Super fun.

  • ElectroBOOM
    ElectroBOOM 5 ай бұрын +699

    Love the bounciness! Would you be able to explain in another video why the balls tend to bounce back to the center of the trampoline? I have an idea, but after I lost our argument last time, I won't share it just in case!

    • seneca983
      seneca983 5 ай бұрын +5

      @Andreas No, that's not it. A 2D random walk eventually ends up in *any* point in a lattice, not just the starting point. In this case we can clearly see the ball tending towards the center instead of moving fully randomly. The surface must be concave (and that's what Steve Mould said here in the comments).

    • Andreas
      Andreas 5 ай бұрын

      Could be just because 2D random walk ends up at the starting point math.uchicago.edu/~may/REU2018/REUPapers/Ombrellaro.pdf

    • CHARLES Camen
      CHARLES Camen 5 ай бұрын +3

      I believe it is based on the angle of deflection of the base surface.
      Consider a 2d model of the circular plate as a single beam.
      If the bounces perfectly central the slope of each side of the beam are equal resulting in a perfectly vertical rebound.
      However if the ball lands off centre then one side is shorter than the other, resulting in a slightly steeper slope on the shorter length side. This will result in a bias to deflect the ball away from the shorter side to wards the centre of the beam.
      Comments please.

    • CHARLES Camen
      CHARLES Camen 5 ай бұрын +2

      I believe it is based on the angle of deflection of the base surface.
      Consider a 2d model of the circular plate as a single beam.
      If the bounces perfectly central the slope of each side of the beam are equal resulting in a perfectly vertical rebound.
      However if the ball lands off centre then one side is shorter than the other, resulting in a slightly steeper slope on the shorter length side. This will result in a bias to deflect the ball away from the shorter side to wards the centre of the beam.
      Comments please.

    • seneca983
      seneca983 5 ай бұрын +4

      @BANYANAMANYANA No, gravity between the ball and the metal surface is tiny. It would be impossible to notice in this kind of setup.

  • Caleb Stroup
    Caleb Stroup 3 ай бұрын +6

    so what if you had a metal made from a single "perfect" crystal of metal? would that then become a superior bouncy surface than a standard metal that contains imperfections?

  • xcvxc
    xcvxc 5 ай бұрын

    My initial thought about the breeze block was that the rough surface would make it increasingly hard to level everything perfectly so that the balls don't wander off. I wonder how difficult that was. My second thought was that the porous breeze block would probably absorb a lot of energy compared to something more dense.

  • Eric Palmer
    Eric Palmer 3 ай бұрын +4

    This is insanely fun to watch. Great explanations.

  • cerberus413
    cerberus413 3 ай бұрын +3

    This is cool, that material must be incredibly hard ont he rockwell scale. You can get a similar, if not as good, effect with heat treated metals with very high hardness. A tungsten carbide disk brazed to a larger steel billet would probably be really close if you wanted to homebrew one.

    (BANNED OPINION) 3 күн бұрын

    So nice of Tim to lend you their very bouncy metal!

  • Christopher Summers
    Christopher Summers 5 ай бұрын +1477

    it took a lot of balls to make this video. well done!

  • DGA2000
    DGA2000 3 ай бұрын +4

    I'm with you! My first thought was of amorphous metal ball bearings. So curious how that might affect the bounce

  • Zack Finsand
    Zack Finsand 5 ай бұрын +1

    What happens if you use two surfaces? It would be interesting to see two experiments one where the top surface is stationed above the balls initial drop. Then another experiment with the surface placed into the balls path upon its return upwards.

  • Manuel
    Manuel 4 ай бұрын

    Would be interesting to derive the cubic/quadratic ratio and test it at different pressure to see which one fit's the theoretical value the best or worst.

  • jacksonlefteye
    jacksonlefteye 5 ай бұрын +2

    love this! one of the best science videos i've seen in a while, fascinating aspect of metallurgy i had no knowledge of

  • Too poo
    Too poo 4 ай бұрын +2

    Why is glass transparent? I know I can look it up, but you should do a video on it because I enjoy hearing your explanations

  • Matt Watson
    Matt Watson 5 ай бұрын +432

    I love the bit where the bounces per second matches up with the frame rate and it looks like it’s floating.

  • MultivariatePerspective
    MultivariatePerspective 5 ай бұрын +2

    Steve, did you consider that the magnet ball release technique might have influenced your 1 minute plus run? I mean intrinsic temporary magnetism or similar?

  • Moritz Korsch
    Moritz Korsch 4 ай бұрын

    I just got this video recommended by the YT. Really good video. Production value, recording quality and the writing and delivery are spot on!
    I would have loved to see that vacuum pump used for a demonstration between the extremes of your experiment (smallest and biggest bearing ball (I just learned that, thanks!) of 2 or more materials).
    Just because I am intrigued: can someone tell me if you could calculate the "lost" energy from the loudness/pitch of the sound it makes?
    Also, to get an amorphous metal ball, maybe challenge some chemistry KZcliprs like Nilered to try and make it! I can imagine it might be fun for them and also a great video for us!

  • Skindrid
    Skindrid 4 ай бұрын +1

    I don't know if its possible but could you possibly obtain a bearing made of the same exact compounds as the plate and see how that affects the bounce

  • Originus1
    Originus1 5 ай бұрын

    have you tested the bounce time with air AND with the glass cover on top? Maybe this is a factor, why in vacuum it doesnt bounce that much longer (similar to the change to put the device on a brick)

  • mstalcup
    mstalcup Ай бұрын

    The ruby bearing is especially wear resistant. These are used as the point [of contact] in performance tops that are designed to spin as long as possible.

  • TimeBucks
    TimeBucks 5 ай бұрын +324

    Your videos are just amazing

  • PlaidSnake
    PlaidSnake 2 ай бұрын +1

    Hey Steve. Not sure if you'll ever see this, but do the bounces of the ball bearing follow the 80/20 rule over time? As in, do 80% of the bounces occur in the final 20% of the time?

  • JellyMonster1
    JellyMonster1 5 ай бұрын

    I never knew ball bearings could be so entertaining! Great weird video - thanks.

  • Blaze Townsend
    Blaze Townsend 14 күн бұрын

    If it helps, the outer and inner parts of a ball bearing are called races. The reason they call it a ball bearing is to denote the type of bearing inside the races, as there are tapered bearings and rod bearings as examples of alternatives. Awesome video, thank you for sharing.

  • topquark22
    topquark22 5 ай бұрын

    Hi Steve, Have you made a video about Nitinol? It is called a "memory metal" because, although it can deform plastically, it can also be gotten to return to its original shape. I'd love you to explain how that is possible. Thanks.

  • Mike Hammer
    Mike Hammer 5 ай бұрын

    Looking at the AISI steel bearing size test, the 5mm one seems to be an anomalous as the bearings on both the larger and smaller side of it do not bounce as well, yet the 7mm one fits well with the 8 and 6 mm and is almost as great as the 5mm. I think this would be obvious if you plotted the size versus time. Watching this reminds me of the superballs from my youth.

  • Josh Young
    Josh Young 5 ай бұрын +180

    Grand Illusions is such a gem, it warms my heart to see you guys team up in any way!

    • James Carey
      James Carey 5 ай бұрын +1

      Yes a great illusion. Thumbnail gave the illusion that a ball bearing could bounce on amorphous metal 259 times yet only it was only 45 times. Grand ! Amazing ! Warms my heart too ! Just loved it when I wasted 18 minutes to have the illusion shattered.

    • Charles Taylor
      Charles Taylor 5 ай бұрын +9

      Tim is great. I can honestly say I've enjoyed every single show of his. I like how a lot of my subs know each other, and work together. They've even flown from the US to do a show with Steve.

  • Buen Min
    Buen Min 5 ай бұрын +2

    There is an alternative audio software to audacity called reaper which allows you to detect and at the same time count so called "transients" sharp amplitude peaks in audio signals. The function is called "dynamic split items" if you wanna try it out. Reaper is free for a 30 day trial and after that still very affordable at only around 60 bucks or so. So feel free to try it out the next time you need something like that :)

  • Original Oliphant
    Original Oliphant Ай бұрын

    Excellent video. When you pressed your thumb on the artist's eraser around 10 min in it triggered an olfactory memory and I could smell the eraser from my childhood. Fascinating.

  • Young
    Young 4 ай бұрын

    I don't know why or how I ended up here, but that was really fascinating! Really well explained and super engaging! Thank you for this video! :D

  • toast_recon
    toast_recon 3 ай бұрын +2

    The tuning of the ball material to floor material reminds me of impedance matching for optimal power transfer.

  • Leonard Smith
    Leonard Smith 5 ай бұрын

    Cool video, LiquidMetal Technologies made a video 11 years ago with a stainless bearing bouncing on their material for 81 seconds. Its cool that there are more companies researching amorphous solids. It would be awesome to see an amorphous bearing against the amorphous plate.

  • Mirthy
    Mirthy 5 ай бұрын +225

    I love grand illusions! Tim's channel is so positive. It's always pleasant when things I follow collide

    • Soken50
      Soken50 5 ай бұрын +5

      @fluffysheap or break apart, RIP glass tube

    • fluffysheap
      fluffysheap 5 ай бұрын +20

      And then bounce back with a high coefficient of restitution

  • VR DaD
    VR DaD  10 күн бұрын

    I didn't expect I would have watched bouncing balls for 18 minutes...and yet I did. Great video.

  • rigid rumors
    rigid rumors 4 ай бұрын

    The sound of the ball is lovely, sounds like its very excited :)
    What would a knife made out of amorphous metal do?

  • Iron Dog
    Iron Dog 17 сағат бұрын

    Great vid! Watching it made me think of a bounce test, with a steel ball bearing on perfectly flat anvil. The blacksmith in question was extememely impressed on how long the bearing bounced, as well as how much he could conserve in an arm swing with his hammer.
    It totally sits in line with the results in your vid. As we know, energy cannot be lost, but transferred into an alternative form - sound, heat, light, friction, deformation, etc.
    I would love to see the results with a hardened vehicle on a flattened, hardened surface (due to the atomic gaps being smaller) as well as on a hardened amorphous (if it is possible) material.
    Is it physically/atomically possible to revolutionise the ol' hammer? Food for thought!

  • Tomaz Tannhäuser
    Tomaz Tannhäuser 5 ай бұрын +1

    If you can find a disc of AM-III amorphous glass of a similar size and a ball bearing of AM-III as well, I think you might be able to beat your record.

  • Topher The11th
    Topher The11th 18 күн бұрын +1

    A long time ago there was a distinction between roller-bearings and ball-bearings. The rolling elements of roller-bearings were tiny cylinders rather than tiny balls. I believe there was another type where each rolling element was machined to be two cones joined base-to-base, pointy-ends outwards. The curved surfaces might not have been the cones you get by taking a gore out of a flat surface, but, rather, curved a bit inwards or outwards. The bigger elements, the circles inside which the bearings roll, could have had quite a complex geometry since ordinarily a cone will not want to roll STRAIGHT on a flat surface, and if forced to do so will have a lot of friction from the forced skidding. I'm not sure how all of that would've been worked out.

  • UninstallingWindows
    UninstallingWindows 5 ай бұрын +235

    Plasticity changes a lot with the change in temperature. It would be great to see how frozen metals compare to room temperature metals in this test. Steve probably has liquid nitrogen next to his bed, so he could make a test and let us know how it worked.

    • Mr Redstoner
      Mr Redstoner 2 ай бұрын +1

      @Lukas H. How about the balls though? Especially the steel ones.

    • kindlin
      kindlin 5 ай бұрын

      @Jarek Ferenc It's all about hardness, which can change dramatically with temperature. A very cold thing can become very hard and brittle, and could allow for much cleaner bounces because of this. Make it cold enough and the bearing heavy enough, and something will shatter instead of bouncing, and I expect this to be a very elastic collision right before that transition. There are a whole series of experiments about bounce height and material hardness and strength you could do here.

    • Jarek Ferenc
      Jarek Ferenc 5 ай бұрын

      @NO WAY My gut feeling is telling me: a bit. A very tiny bit. Cooling down to -40°C will not increase the yield point significantly. The BMGs exhibit the yield point (if they undergo any plastic strain) at some 1000 MPa, which is incredibly high, so the stress at impact is usually within the elastic range. Thus, lowering the temperature to -40°C will have a negligible effect.
      BTW, if iron-based BMGs are considered instead of zirconium-based ones (probably they were used in this film), they would withstand the compressive stress of 4000 MPa or even higher. Making the amorphous plate 2 mm thick is possible even if it is iron-based.

    • kindlin
      kindlin 5 ай бұрын +1

      That was the variable I hoped he was talking about! And then he pulled out multiple _sized_ bearings, and I was like, Ok, sure, they all have different stiffnesses and air resistances, so you'll get interesting results, but I wanted to see liquid nitrogen and blow torches!

    • Colton Jones
      Colton Jones 5 ай бұрын

      @Josh Peterson ohh yeah! Like a double bounce on a trampoline. Although at that point wouldn't you be adding energy to the system?

  • east coast andy
    east coast andy 4 ай бұрын

    Great analysis, Steve. You seem to have set many minds thinking. Mine for sure, thanks!

  • ferwildfire
    ferwildfire 4 ай бұрын

    Nice video. Missed to mention that it is in fact the hardness property what we are looking for rather than stiffness

  • John Çamkıran
    John Çamkıran 5 ай бұрын

    Cheers for giving bulk metallic glasses some much needed airtime Steve

  • Goldsmith
    Goldsmith 13 күн бұрын

    Wonder if you could calculate the speed of the shock wave travelling through the base material. If it is sitting on a material significantly stiffer, then the reflected shockwave could form a constructive interference pattern in sync with the ball bearing contacts. Would provide the most benefit at the beginning of the bounce I presume. What about temps?

  • James Wilson
    James Wilson 5 ай бұрын

    I would love to see how this could work on the ISS. Yes, I know that the BB would need some acceleration to get started.

  • Morgan
    Morgan 5 ай бұрын +236

    to count all but the audio rate bounces, you can use audacity’s sound finder feature (i think that’s what it’s called, and it’s in one of the last three menus). it creates labels which are numbered in a separate label track. you can also slow the audio down and then run the sound finder, to give it an easier time finding the bounces.

    • aceman0000099
      aceman0000099 5 ай бұрын +2

      I've not used it since 2003, i think it's called 'mute'?

    • Steve Slaughter
      Steve Slaughter 5 ай бұрын +13

      I think it's called Beat Finder - haven't used it for a while, so..?

  • Goz Attila
    Goz Attila 3 ай бұрын +1

    What an amount of work! So impressive!

  • Laurin
    Laurin 5 ай бұрын

    Sorry if you cover this later, but while you were talking about the different materials, I wondered about how Amorphous Ball would interact with Amorphous Disc??... Very Interesting stuff btw🤔

  • gitchegumee
    gitchegumee 3 ай бұрын +7

    As a mechanic without an engineering degree, I'm curious if temperature would have an effect? Would heating or cooling either the materials of the bearing and the impact plate or the air within the glass column make a measurable change? Also as a mechanic who deals with bearings in the field and not a lab, would impurities (finger oils or dust) affect results? I've dealt with bearings that a dirty finger print would affect it's performance, although that is probably more a rotational force.

    • Fred MacMurray
      Fred MacMurray 2 ай бұрын

      Running tests with the system at different temperatures would be interesting.
      A heated ball would have more energy to start with. But, the electrons in the balls metal could be more free to move around. If it's cooled, the electrons are more tightly held but over all the ball has lower energy. Or, heat transfer with the air would cancel out any temperature change.
      A cool line of inquiry no matter how it turns out.

  • Speaks The Obvious
    Speaks The Obvious 3 ай бұрын +1

    What would the bounce rate be based on temperature? Like, how much longer or shorter would it bounce if it just came out of a bowl of liquid nitrogen?

  • Ricksdetrix
    Ricksdetrix 4 ай бұрын

    The sound during the vacuum test is a really good illustation of energy lost through the materials when it bounces

  • Zye Duval
    Zye Duval 5 ай бұрын +125

    Steve, Little tip of advice from an audio engineer.
    If you ever find yourself needing to count the peaks of a audio waveform again. Save your time and eyes, Look up Dynamic Splitting. You essentially set a threshold above the noise floor and it will detect any transients (peaks) above your setting and then splits them all. Resulting in each transient being its own audio "file". Highlight all files and see how many you have selected, or a good Slicer will tell you how many transients are detected before actually splitting for you.

  • Terra Firma
    Terra Firma 5 ай бұрын +1

    Would love to see a newtons cradle made from this anomorphis metal and see how long it goes🤔

    • Terra Firma
      Terra Firma 5 ай бұрын +1

      And a fidget spinner of this metal as well😉

  • CavesOfMemories II LostVital
    CavesOfMemories II LostVital 5 ай бұрын

    What happens if you supercool or heat up the bearings and bounce them? Does this affect it’s consistency?

  • Dale Smith
    Dale Smith 4 ай бұрын

    I was thinking you could do sample tests of air vs. no air and then compare the means statistically and see if there is a difference (t-test).

  • Wir Alle
    Wir Alle 4 ай бұрын

    Maybe there is also a sort of resonat effect between the ball and the ground plate, that can be used to improve the duration (theoretically):
    The ball has its own vibration, it wobbles (11:40) and it does it at a very specific frequency (resonance frequency). the same applies to the base plate. If both have the same resonant frequency and both oscillate synchronously after the initial beat, this could possibly have an effect. Or even if the resonant frequency is different, but in such a way that they influence each other positively at the moment of collision, I think the system will oscillate as follows: When the swinging ball hits the also swinging base plate and that happens exactly at the moment when both are compressed (the vertical expansion of both is at the minimum ), or even a little before reaching the minimum (as in the combustion engine: just before the dead center is reached), so that both make contact while each is still in the contraction phase, so the impact energy is still something for both squeezing a little bit more. It's like a swinging spring that gets an extra impulse just before it reverses direction.

  • Luke D
    Luke D 4 ай бұрын

    Will Stelter showed a method of testing anvils similar to this, the frequency of bounces toward the end is mesmerising. It's as if the bearing is momentarily floating

  • Grape Toad
    Grape Toad 5 ай бұрын +309

    Watching the metals change by weight making a normal distribution, very cool.
    Why are the amorphous metals suddenly harder to find?

    • KJ Dude
      KJ Dude 5 ай бұрын +51

      From what I gather they were made as an Educational demo. So not available commercially in this format. The company (as a spin off) still manufactures items from this material and other similar ones.

  • Alex Boo
    Alex Boo 5 ай бұрын +2

    Sounds like it would make great armour plating. A ceramic armour is often mentioned in scifi (eg 40k marine armour)

  • Maikel Versantvoort
    Maikel Versantvoort 5 ай бұрын

    Great video Steve, interesting subject!
    However, at 9:41 you mention 'the energy is now lost'.
    Is it really though? ;)
    Also, I like the mention of Grand Illusions!
    Been following them for years, it's always fun to see Tim showcase some quirky toy.

  • Dirk Victor
    Dirk Victor 5 ай бұрын

    You might increase the stiffness by chilling to a low temperature. To avoid moisture condensation, that would necessitate running the experiment in a dry gas (nitrogen and argon are probably the easiest) or vacuum.

  • Bryce Engberg
    Bryce Engberg 3 ай бұрын

    The thing that came to my mind when I was watching this was it similarity to Euler's Disks. I would look into the the technology and study behind those because they are just as dependent on material sciences and conservation of energy and you might find some useful information about this topic.

  • Duncan Van Ooyen
    Duncan Van Ooyen 4 ай бұрын

    This feels like an Inception thing; if you have one of these, and the ball bounces for ever, you're in a dream, if it comes to a stop, it's reality.

  • W Mose
    W Mose 5 ай бұрын +214

    it would be interesting to retest the smallest ball bearings you had in the vacuum chamber to see if there is a large gain with them as you had already selected for the ones that were least effected by air resistance

    • W Mose
      W Mose 5 ай бұрын

      seems like it would make for a good revisit as it is just retesting in the vacuum chamber so i have me fingers crossed there will be part 2

    • sang vo ba
      sang vo ba 5 ай бұрын


    • wassupusa
      wassupusa 5 ай бұрын +1

      Excellent point

  • Rx7man
    Rx7man 3 ай бұрын +8

    One other kind of ball bearing material I'd like to see tried is CBN (Cubic boron nitride), being the 2nd hardest material there is after diamond.. Quartz could be interesting as well.. unfortunately I haven't found any sources for them.
    CBN is often used in machining very hard metals, it's pretty amazing stuff

    • Arek0123
      Arek0123 Ай бұрын

      @Rx7man In theory, the stronger the crystal lattice the harder the material, the problem with ceramic materials it's that it's not structure of single crystal defines their properties but also how crystals are packed in the material. I googled for microscopic structures of CBN and ZrO2 and the CBN has much more empty spaces in structure which can lead to friction between crystals when bouncing and loss of energy. If we could create perfect monocrystalline balls of both material then CBN would be a winner.

    • Rx7man
      Rx7man 2 ай бұрын

      @Fred MacMurray yeah, quite possible, and if they're really locked in you'd think that would provide a stronger crystal lattice.

    • Fred MacMurray
      Fred MacMurray 2 ай бұрын +1

      Good point about density. Makes me think that rebound has more to do with how strongly the electrons are locked into their orbits.

    • Rx7man
      Rx7man 3 ай бұрын

      @Stewart Ross I think the density would be minor in comparison to hardness.. density would mitigate the air friction a little but not much more.. try lead and gold.. heck, try mercury :)

    • Stewart Ross
      Stewart Ross 3 ай бұрын

      i wonder if density would affect results. it would be interesting to try osmium

  • Jim
    Jim 4 ай бұрын

    When I was watching Tourette's Guy on KZclip 15 years ago, I never imagined I'd eventually be watching some guy on here spend an incredible amount of time and energy and considerable expense into seeing how long he could make various bearing balls bounce. I mean ball bearings bounce.

  • Graham
    Graham 4 ай бұрын

    Does the temperature of the materials impact their restitution coefficient? Would make the experiment more difficult for sure though, making sure to keep other variables the same.

  • Peter A Lawrence
    Peter A Lawrence 5 ай бұрын

    the way to get a better coefficient of restitution is to size and shape the anvil so that it reflects all of the sound energy back to the ball before the ball leaves, rather than having that energy come out as the sound we hear. also remember that "super balls" are hollow, again to ensure that the elastic energy goes back into its bounce rather than to a vibrational mode of the ball itself (but good luck getting a hollow bearing ball !).

  • Sam Watkins
    Sam Watkins 4 ай бұрын

    Even if the ball did bounce an infinite number of times, the duration of each bounce decreases geometrically so the total time taken is limited, kind of like Zeno's "paradox".

  • aquietwhyme
    aquietwhyme 5 ай бұрын +334

    I wanted to be a materials scientist when I was little, until I got a little older and realized that my days would be spent doing things like this all day long. It's much more enjoyable to watch you do it for us, lol.

    • van truong thi
      van truong thi 5 ай бұрын


    • Vigilant Cosmic Penguin
      Vigilant Cosmic Penguin 5 ай бұрын +1

      A lot of things are more fun when someone else is doing it.

    • dejan jeremic
      dejan jeremic 5 ай бұрын

      I am a material scientist and i did this 1-2x in my 20+y career.= You have a great missconception.

    • i Backwoods
      i Backwoods 5 ай бұрын +2

      This job is not boring hypothesis and testing is the most fun you can get out of life lol

  • GamersPlayGrounD / LiQuiDM3tH
    GamersPlayGrounD / LiQuiDM3tH 5 ай бұрын +1

    love when the ball matches the frame rate of the camera and looks like its floating...

  • Stan Stevens
    Stan Stevens 2 ай бұрын

    Is there a known value of Young’s modulus for this metal?
    You mentioned there was a difference between stiffness and elasticity but I thought that they were the same or similar

  • Denon Sparks
    Denon Sparks Ай бұрын

    Steel bearing on granite, marble, ceramic flooring bounces really well.

  • Scott Debruyn
    Scott Debruyn 4 ай бұрын +1

    I'd be curious if this experiment was performed in a vacuum! I suspect much longer bounce times... :)

  • Picksalot
    Picksalot 4 ай бұрын

    That amorphous metal might be useful in musical instruments like guitars for lengthening the duration a string vibrates, while maintaining its amplitude for as long as possible. That material could be used for the Bridge Saddle and the Nut. 🤔🤓

  • Scarfmonster
    Scarfmonster 5 ай бұрын +126

    A collaboration between Steve Mould and Grand Illusions was not one I was ever expecting.

  • DirtDertDurt
    DirtDertDurt 4 ай бұрын

    "But the point is: look at it bounce!" Timeless

  • Monster Bash
    Monster Bash 5 ай бұрын +1

    So, the amorphous steel just sounds like hardened steel from what you're describing. If you want an amorphous bearing you should take one of those 52100 bearings, heat it to about 1500 degrees freedomheight, hold it there a minute, then quench it in oil. Vegetable oil or peanut oil is just fine.

  • DaemoniKira
    DaemoniKira 4 ай бұрын +2

    Your voice is so soothing. Just the tonality and your speech/cadence, it's really calming.
    Also, this was so much new information. I've also never seen anything so strange and satisfying as these tiny metal/ceramic balls bouncing way more than they have any business doing. Even the sounds are immensely satisfying, the pops from each bounce.
    I wonder if there's some kind of application for this ultra-bouncy metal, in harnessing kinetic energy. "Every bounce charges my phone 0.003%" lol.
    And man, I wish KiwiCo had been around when I was a kid. That subscription service sounds exactly like something I'd have loved as a kid, and I'm positive I'd have learned quite a lot from it.

  • Ripley Leuzarder
    Ripley Leuzarder 4 ай бұрын

    @12.06 could the sound generated echo from the lower contact surface and shoot up and give the force additional energy to keep it running for so long? Which brings to question? do you have any sound density/speed, data for resonance etc... that would be interesting to see.

  • Tim Weisgerber
    Tim Weisgerber 5 ай бұрын

    So cool! I'd love to know what frame rate this was shot at. Looks like 24fps. Maybe 30? Not important at all. Just curious:) great video!

  • SeanHodgins
    SeanHodgins 5 ай бұрын +162

    I created a jig to test COR in university as a project. After testing a number of materials, was very surprised(as was the class when I demonstrated) that cast acrylic had an extremely high COR. I don't know why but everyone assumed it would dampen the bounce.

    • threeMetreJim
      threeMetreJim 5 ай бұрын

      The 5mm balls used for 'bb gun' ammunition are very bouncy on a hard surface (floor tiling is best but also very bouncy on wood laminate flooring). I think they are also some sort of cast plastic. Used the property for a 'door trap' to make sure no-one was sneaking into a room of mine before - count the balls load them into a pot that is released if the door is openend; because they bounce all over the place it's hardly likely they would all be found and replaced so you know if the trap was sprung (count the balls in the trap without setting it off). Unfortunately I forgot I'd set it one time, and ended up with balls bouncing everywhere on entry. 🙄

    • Charles Bosse
      Charles Bosse 5 ай бұрын +4

      Yeah, you can get acrylic balls at TAP that bounce like really noisy superballs... they also don't really warm up as they bounce. Unless they crack or chip, they really don't stay deformed. PLA on the other hand... "sploot"

  • Jeremy Lindsey
    Jeremy Lindsey 2 ай бұрын

    Some days I see your videos and am locked into the concepts and the variables involved, today I'm like "ooh what kind of cats are those?"

  • Bolicob IV
    Bolicob IV 26 күн бұрын

    Now I'm curious why rubber bouncy balls bounce so much better than something like a rock in regular situations