Dominoes - HARDCORE Mode - Smarter Every Day 182

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  • Published on Dec 11, 2017
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    If you want your own personalized DNA genotype data here's the link: www.23andme.com/smarter
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    3Blue1Brown
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    Slow Motion Sound, Ambiance and musicy things by: Gordon McGladdery did the outro music the video.
    ashellinthepit.bandcamp.com/
    Dominoes Provided by:
    bulkdominoes.com/
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    GET SMARTER SECTION
    I expected the hardwood to be faster than the felt because the rotational moment of inertia when spinning around the center is 1/4th that of tipping on the edge. I was wrong in this case, but I'm wondering if this would hold true on glass?
    THANK YOU EVERYONE who helped reduce the data! Names at bottom of this description. Follow the SED subreddit and other stuff if you want to help with stuff like this in the future. Here's the link and spreadsheet to see how we did this:
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    Rotational Inertia of falling dominoes can be calculated with this.
    en.wikipedia.org/wiki/Parallel_axis_theorem
    There are several papers on dominoes out there... but none really touched on the stuff I'm talking about in this video. Please feel free to point me to sources if you've found them.
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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    ~~~~~~~~~~~~~~~~~~~~
    THANK YOU to the following folks who helped process the data names below!
    (See the data here:
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    Also, thank you to my Church, First Bible Church of Decatur, Alabama for the use of the gym over 2 days. fbc.org/
    ~~~~~~~~~~~~~~~~~~~~~~~~
    The thought is it my efforts making videos will help educate the world as a whole, and one day generate enough revenue to pay for my kids college education. Until then if you appreciate what you've learned in this video and the effort that went in to it, please SHARE THE VIDEO!
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    #smartereveryday
    #slowmotion
    #Dominoes
  • Science & TechnologyScience & Technology

Comments • 3 646

  • 3Blue1Brown
    3Blue1Brown Year ago +5954

    What a surprisingly fascinating topic!

    • yolars69
      yolars69 7 days ago

      I wonder if the air between the dominoes has an effect. I you did this in a vacuum would it have the same results?

    • Explore NC
      Explore NC 7 days ago +1

      For an infant i suppose it is surprising and fascinating.

    • Kevin Knox
      Kevin Knox 23 days ago

      Love your work, Grant!

    • Nicole Jones
      Nicole Jones 29 days ago

      Cancer won’t be cured because of a non scientific phenomena... greed. The greed of humans. A topic that to me seems very obscure. When a person is going through cancer or their significant other or perhaps a child or immediate family, greed doesn’t exist, no one at that point is thinking will cures or treatments make enough money for the company and share holders, they are just thinking I want a cure. Anything to get out of the violent way of cancer and it’s current treatments on the body. Yet before hand, the very same people, were only thinking about finding a cure that could be patentable. If you’re a bit skeptical to this idea, go read medical journals on cancer treatments tested in labs or Petri dishes. Almost all cancer in those situations have been effectively cured. Or go ask a recent grad student about it. However, they will tell you that when in a human those same cures will not work, be of what they call the “human element.” But upon further reading, you might be shocked to know that those successful lab cures with somewhat natural ingredients or natural carriers of small doses of synthetic chemo chemicals to treat cancerous cells in a Petri dish, were never tested with anything larger than the Petri dish. Meaning, that there was no human element or any sort of animal test. In fact only the profitable solutions, are ever taken to a next step, regardless if those are not the best solutions. Typically they are ones that do a less effective job of killing the cancer and most always have a far worse impact on the host themselves, dangerously exposing all cells, cancerous and non cancerous, to life threatening dangers. Why though? Why only test further on more dangerous methods that are less effective. Because there should be a graph that shows the profit to be made on each treatment. A cure doesn’t insure much profit at all, because as we’ll know, a treatment that is very effective such as a vaccine is cheap, and doesn’t offer returned treatments. Not to say there are vaccines for cancer. But it’s the continued fallow up MRI’s, CT scans, pharmaceuticals, radiation, chemo treatments, corrective surgeries, maintenance surgeries like port a cath insertions, maintenance to those treatments like flushing of port a cath’s or blood draws, even nutritional consultants, that make the real money. A cancer patient will effectively use almost every single department of a hospital outside of neonatal or prenatal and some specialists. It almost guarantees that most services in a hospital will be paid for use upon treatments. A cure simply isn’t in the hospital or boards best interest. You might be thinking back to a vaccine, why do those exist, well predominantly because they don’t have much other treatments that can stop the sickness. Meaning if there was no vaccine, it’s not like all these other hospital services could be used to cure it another way, typically the patient either cures themselves after very dangerous fevers or they die. So when no money can be made, then a simple cure is a good idea. Not to mention diseases like polio can spread quickly and vastly to a lot of people killing them quite easily. Which also doesn’t make sense to have happen, bc epidemic or pandemic disease like small pox or the plague or polio, or essentially killing what will end up being patients that will later come in with high dollar diseases like cancer or heart disease, or diabetes etc. it makes no sense to have your customer base die when if you save them you can count on them returning time and time again for much longer, treatment required diseases. Plus a lot of those vaccines where made a long time ago and there was different ideals back then. But this all presents a problem that 1 in 2 people will eventually face in their lifetime, there is a fine balance that is influenced by money rather than the just the search for a cure. It’s very interesting and having cancer at 27 and my mom who passed from it and brother in law also passed recently from it, it really makes you think and wonder if it’s even ethical at all or at least why can’t it be made more transparent, why is it so difficult to do research on things like this. And you might thinking well I’m just bitter having suffered for three years from it, but actually I understand why this process exists. And if you ask hospitals, if they are honest, they will explain that if there were not a treatment processes, if everything was just a simple one and done cure, then there would be no money to fund the hospital or the research facilities or any other of the institutions that contribute to doing good for a lot of people who need care on all sorts of other things. It’s almost like the inevitable diseases almost everyone will get is paying to give health care to everyone else. I don’t think the majority of people would freak out if that information was transparent, if they could just show us why a particular treatment wasn’t considered bc of the cost/benefit. I mean we are intelligent enough to know how a business is ran, but maybe not, maybe people would loose their mind if they knew, what do you guys think? Are we adult enough to know these things if everything I’m saying is true or do you think people need the info hidden from them?
      Still I think it what would be interesting is to see a graph that displays that information on how much profit is needed to consider a cure viable to test on humans. Just saying.

  • Ayewjay
    Ayewjay 7 hours ago

    is it possible that the first dominoe isn't falling straight on because it was every so slightly skewed?

    • Ayewjay
      Ayewjay 7 hours ago

      What I mean is, do you think it would turn out the same way if we were able to delegate the setting up of the dominoes to a machine that can only set them up perfectly semetrical?

  • Aura Vitals
    Aura Vitals Day ago

    I wonder if it's possible to color aerogel and what effect it will have on the thermal properties

  • Becky Schmidt
    Becky Schmidt 3 days ago

    ...and what about the European "myth" that color affects the rate of falling?

  • gelfrog93
    gelfrog93 5 days ago

    Thank you for making a point about the importance of 'silly' questions. I get so many people at work being unsure and apologising for asking asking such questions but I completely agree with you; these are the important questions to ask to understand what is really going on around you.

  • Explore NC
    Explore NC 7 days ago +1

    I pretty much already knew all of this information from playing with dominoes as an infant !! Didnt really learn anything new here, there for i am not smarter because of this !

  • Chris Newman
    Chris Newman 7 days ago

    Dominoes - The start of the sequence was not flush to begin with hence it will rotate the affect through causing the result we witnessed. The foundation medium played a large impact on the way the dominoes fell. I REALLY like this channel, and I am now subscribed. Thank you for the content, you rock!

  • anonexis1223
    anonexis1223 10 days ago

    Hey whynot use the sound. The sound is fast as to give accurate numbers at these distances.

  • Adam Crooks
    Adam Crooks 11 days ago

    Wouldn't it be easier to time the dominos by sound instead of visually? You wouldn't even need to film them to time it.... right? sorry if the question is dumb. Just thinking "out loud". :)

  • Justyn Jones
    Justyn Jones 11 days ago

    why not just film it from the top instead of the side

  • Charlie Angkor
    Charlie Angkor 11 days ago

    just record the sound and read out the time intervals in Audacity

  • Zack Brands
    Zack Brands 12 days ago +1

    Well now I just want to know what the perfect distance for a given domino size to be placed apart is...

  • TheReykjavik
    TheReykjavik 12 days ago

    Wouldn't it be a lot easier to find contact times by the sound of the dominoes hitting each other?
    The high speed camera footage is great for showing the rotations of the dominoes, I suspect you might get some useful information out of the audio too.

  • Benjamin Cushwa
    Benjamin Cushwa 13 days ago

    This video is fantastic. Simple curiosity and basic research is so important to how we grow intellectually and as a society.

  • hey__chris
    hey__chris 14 days ago

    What happens if you put two threads on opposite sides of the Domino's? Kind of like a guided path.

  • ZC Toppling
    ZC Toppling 14 days ago

    Yes people think dominoes are all nerdy things but in general they can teach you a lot! I do domino toppling with thousands of dominoes if you want to check me out!

  • WatchKatiePaint
    WatchKatiePaint 14 days ago +1

    I WANT THOSE DOMINOS BC THEIR SO BEAUTIFUL

  • SICKMERCURY777
    SICKMERCURY777 17 days ago +1

    WOW! Really!

  • More Money
    More Money 17 days ago

    Hey destin, I don’t know if you’re going to see this or not.. but I just wanted to say for the last couple years of my life I was in a bad place and was using drugs to number the pain temporarily.. thank I’m god I’m doing a lot better now and I’m start school this fall to become a mechanical engineer! I just wanted to tell you during that time I would always watch your videos and they were on of the few things that made me happy! Keep on doing what you’re doing, and I love that there on people like you on this earth!!!

  • Redberb . C
    Redberb . C 20 days ago

    5:49 ya boi

  • nooranik21
    nooranik21 20 days ago

    V would like to know your location.

  • Macadoof
    Macadoof 21 day ago

    Absolutely amazing video. So simple, yet so complex.
    I'll definitely apply the "Ask the simple questions" line more in my life.
    Thanks Destin

  • Francis Raposo
    Francis Raposo 23 days ago

    Giving the SlowMo Guys a run for their money

  • Steffen m
    Steffen m 23 days ago

    Why not just use a telephoto lens to minimize distortion instead of using a moving rig?

  • Dr. Zoidberg
    Dr. Zoidberg 23 days ago +1

    *_I think a lot of times we forget or overlook how complex the universe we live in really is._*

  • Kurt Rethorn
    Kurt Rethorn 25 days ago

    Precision is fascinating. Also nice work on the audio to your audio guy. Was that a pitched down ratcheting mechanism used for the dominoes? I’m paying a lot more attention to the audio now since watching that video with your audio guy, and I’m impressed and inspired. Your channel is a great mesh of art and science, perhaps because art is creative problem solving and so is designing a good experiment. Thanks for everything Destin.

  • Nanette Sage
    Nanette Sage 25 days ago

    As the dominos fall we are watching the fall of Civilization. Each past event affects the future.

  • nabinnyc
    nabinnyc 25 days ago

    This is the most elaborate... and effective... Jolly Rancher commercial I've ever seen.

  • Benedikt G.
    Benedikt G. 26 days ago

    Did you consider the intermediate axis theorem for the spikiness of the curve? Additional translation acceleration at the top due instability in the the turning motion around the "second" axis?

  • Captain Beast
    Captain Beast 26 days ago

    Mark Rober has that camera system that tracks the dart. Could you set up a top view camera that tracks the movement and tells the moving camera how fast to move? So Domino's are the dart but you are tracking the wave.

  • Erics reviews
    Erics reviews 26 days ago +1

    Fricken love your videos.

  • Viral Videos
    Viral Videos 26 days ago

    You know what would help understanding the domino effect. A free body diagram.

  • Blu
    Blu 26 days ago

    need to call captain disillusion to see if that halfcourt shot was real

  • Libor Wagner
    Libor Wagner 27 days ago

    Would it be possible to use sound to measure that speed?

  • R3M1ND
    R3M1ND 28 days ago

    if your ever trying to do this again,. use something like a small wall behind the dominos and stick a laser to the camera so you can check the position of the camera at all time and ajust while moving

  • Torm Endor
    Torm Endor 28 days ago

    I have no idea how you make the videos this exciting

  • Eli Kennedy
    Eli Kennedy 28 days ago

    I'm a 36 yr old computer scientist in Australia and I still love learning new stuff watching your videos. Thanks Destin.

  • Nolan Noble
    Nolan Noble 29 days ago

    More like 22 and me 😅

  • CrusaderZav
    CrusaderZav 29 days ago

    These dominoes look delicious.

  • Roger Giacomelli
    Roger Giacomelli 29 days ago

    The only thing stupider than a question not asked is the one who didn't ask it.

  • Steve aaron Defries
    Steve aaron Defries 29 days ago

    Fav last shot ever

  • Hui Lin
    Hui Lin 29 days ago

    Wow Ethan, great move, keep it UP!

  • Nicole Jones
    Nicole Jones 29 days ago

    Idk if it’s just me, but only being 5 min in, I feel like I’m observing different colored dominoes actually performing differently in the situation. Almost like darker colored ones are attracting the fall of the next domino more efficiently than the lighter yellow dominoes are.

  • confused boi ?
    confused boi ? 29 days ago

    can you pls do one about tops??

    • jbaker91585
      jbaker91585 27 days ago

      There's a company that makes one for like 60 bucks that'll spin for 40 hours I think

  • Stranga43 S
    Stranga43 S 29 days ago +2

    After watching this it made me wonder why ice cream and other thick fluids make a spiral stack after falling straight down.

  • Peter P
    Peter P 29 days ago +1

    I'm not sure why all this work happened without having a more controlled force to initiate the test, the twisting is most likely caused by the imperfections of the ruler hitting the first domino.
    Correct me if I'm wrong.

  • D'ran Dana
    D'ran Dana 29 days ago +1

    Imagine if kids had someone like you in their classroom

  • D'ran Dana
    D'ran Dana 29 days ago

    Can you be a teacher already

  • chrisheltra
    chrisheltra 29 days ago +1

    Would it be easier to analyze the audio instead of video to solve the speed question?

    • Nick
      Nick 29 days ago

      I presume going frame by frame would be easier than making out peaks in the audio when they decay this slowly. I'd have to see the waveforms to confirm that though.

  • Linden Mansfield
    Linden Mansfield Month ago

    The dominos are tipping like a wave travelling in water, but watching the moment of collision is like focusing on the white water at the front of the wave. But the main body or mass of the wave is still pushing from the mobile mass STILL falling (this is the steady state velocity rather than the moment of collision). If you want to track the steady state velocity of the wave, you need to LISTEN to the frequency of the tile collisions, then compare that to the different surfaces they are set up on.

  • Charming nowhere to hide

    To establish difference in velocity why didn’t you set up two parallel lines of dominoes hit by the same hammer, one on wood and one on felt, and see which finishes first?

  • Art Connolly
    Art Connolly Month ago

    You need to check out the video when they use bricks as dominos. Something amazing happens with them

  • YingyZingy
    YingyZingy Month ago

    Could you explain the double brick dominoe effect

  • Ganz Bestimmt
    Ganz Bestimmt Month ago

    So some day playing with dominoes may cure cancer? I am on it. ^^

  • Elliott Cason
    Elliott Cason Month ago +6

    Destin, your channel is awesome. Thank you for all you do. I thoroughly enjoy it.

  • Justin nitsuj
    Justin nitsuj Month ago +2

    10:36 of course it's real, but holy snap that actually looks "doctored".

  • Fei Han
    Fei Han Month ago

    I've learned from this video that a crow is a sphere in the vacuum. hahahaha

  • Coty Ratliff
    Coty Ratliff Month ago +1

    wouldn't it have been easier to record the sound and use the sound for timing

    • GayusSchwulius
      GayusSchwulius 28 days ago

      Exactly. You could've used an extremely simple program to get the timing as well. Just feed the raw PCM data into a program, the program scans through the data sample by sample, automatically detecting whenever a threshold of noise is exceeded. Would've saved a lot of work.

  • Dave Fin
    Dave Fin Month ago

    That's a twist. Thats very twisty

  • less kiss
    less kiss Month ago

    Hey! Question for you? Where does that slo-motion sound come from. Is it added in afterwards or is that actually how it's recorded?

  • Paula K.
    Paula K. Month ago

    I got so excited when 3blue1brown was introduced 😁

  • Bhaktisamadhi Pappagiorgio

    Ok, but basic research can go wrong too. "We" dont need much more progress. We better go back a bit to fix the flaws. Like Sky Scholar did with Kirchov's law etc. Let's fix the nuclear waste first instead of wasting public billions in Cern, modyfying DNA and using fetuses to make scam vaccines

  • Nelson Conde Lobo Martins

    The fact that on felt the dominos twist less is the reason why they are a little faster?

  • OJsY
    OJsY Month ago

    I feel so dumb for never guessing these domino-thingy people used spacers to set them. I always thought they went through the annoyance of spacing them themselves lol

  • Legobeto Thegrreat
    Legobeto Thegrreat Month ago

    Hey Dustin. I think you might have missed out on a very reliable source of data for your experiment here. I watched your video but i didn't notice anything about using the audio to obtain data on the timing between each domino collision. If you use a program to analyze and process wave files you can zoom in to each domino and by looking at the wave, you can identify when each domino has collided with the next one, and i assure you it is extremely accurate. You can load those files in to Matlab and possibly write a function that will yield a spreadsheet with the timing between a lot of the dominoes in it. I'm not sure how to do the last part but i'm sure someone can help figure that out. Great video tho.

  • Furbloke
    Furbloke Month ago

    I never realised how much we take dominos for granted. Sure, a simple game that people of different ages play; but also a fascinating example of basic physics

  • grimes202
    grimes202 Month ago

    Coulda just used a couple gopros in series

    • Derek Charette
      Derek Charette Month ago

      There's about 100 reasons why that is a profoundly terrible idea. We are dealing with tolerances of hundredths to possibly thousandths of a second. Do you have any idea how long it would take to calibrate the cameras, then edit each individual video down and string them together? It would take FOREVER, and the results could not possibly be conclusive due to the large margins of variance in the controls of the experiment.

  • Jody Mitoma
    Jody Mitoma Month ago

    You rock. Make more videos. :P

  • Chris Vickery
    Chris Vickery Month ago

    To establish difference in velocity why didn’t you set up two parallel lines of dominoes hit by the same hammer, one on wood and one on felt, and see which finishes first?

  • Draggy654
    Draggy654 Month ago

    Wait why would u need a non youtube job ? U have almost 7 million subs

  • mcnuggets ferg
    mcnuggets ferg Month ago +2

    I noticed a pattern in the dominos from wobbling slightly when falling over to landing square on which is probably what made them faster and slower

  • Steven Schultz
    Steven Schultz Month ago +1

    Be AWARE of DNA companies, YOU are not protected by HIPPA laws and they can share your personal information.

    • TheCortymast
      TheCortymast 28 days ago

      And also they are scams. So Just don't Fall for scams, I guess?

  • Jirka Kucera
    Jirka Kucera Month ago

    I accualy fell into a sleep watching this video, dont even remember watching it lol

  • Awesymoto
    Awesymoto Month ago

    So why was the felt possibly faster?

  • chilliewillie75
    chilliewillie75 Month ago

    I think this is the best video you have done!

    • Derek Charette
      Derek Charette Month ago

      Yea, that's what your mom said to me last night too.

  • Chuck Barnett
    Chuck Barnett Month ago

    OK...not doing Patreon so I'm out of here,

  • Setting Sun
    Setting Sun Month ago

    Cool STUFF..Love your channel...

  • 3_Pancakes
    3_Pancakes Month ago +1

    0:10 Humans are animals too!

  • Morgan Blair
    Morgan Blair Month ago +5

    Hey! Question for you?
    Where does that slo-motion sound come from. Is it added in afterwards or is that actually how it's recorded?

    • Z4G
      Z4G 27 days ago +1

      I think the slo mo guys made a vid where they talked about this. Its pre recorded sounds using stuff that makes similar noises but a bit slowed down to give the slow clip that cherry ontop.

  • Rurpled
    Rurpled Month ago

    Must be like the wave you get with traffic on large motorways. Plot the Y spin direction on impact points (top/bottom spin), and you already have the timestamps of the impact points so can get an idea of overall wavelength by adding time as the X axis. Dominonium's speed must be altered when travelling through different mediums. Or has this been tested in a later video?

  • Lawrence Morkeberg
    Lawrence Morkeberg Month ago

    Second orange domino! You had one job.

  • Theprinciple96
    Theprinciple96 Month ago

    This is a perfect analog for chaos theory

  • Aj Wyeth
    Aj Wyeth Month ago

    Why can’t you get 10 cameras

  • Jesse Wallace
    Jesse Wallace Month ago

    Such...a...dork... And among friends... ;)

  • Samuel Wilson
    Samuel Wilson Month ago

    Could you please fix the wire from your clock... its distracting.

  • CogitoErgoCogitoSum

    @Dustin @SmarterEveryDay, do you vouch for the privacy of 23&me? I dont want my DNA on file for governments or corporations or law enforcement.

  • lucas
    lucas Month ago

    dominoes have rounded edges, making the video you did to determine how they fall on different surfaces skewed at best

  • Kevin Benoit
    Kevin Benoit Month ago

    One issue I see with your test is that you used a variable force to start the chain: a human push.
    Is it possible that the speed with which you pushed the first domino could affect the speed of the remaining dominos?
    It would be different every time since you relied on a human to start the chain instead of something mechanical.

  • Dave Tyler
    Dave Tyler Month ago

    Such an apparently simple process... until you drop into requisite "variable" rabbit hole... so many questio.... 😱

  • Pierce VanLeeuwen
    Pierce VanLeeuwen Month ago

    “Ya boy here” lol 5:50

  • Phil M
    Phil M Month ago

    I've been watching and enjoying your videos for a while now. This was the one that made me subscribe.

  • Jordan Wu
    Jordan Wu Month ago

    Why use visual data when dominos do produce distinctive sound? Use a microphone to collect the data you need.

  • Phildo386
    Phildo386 Month ago +1

    That yellow domino that stays standing is an absolute unit.

  • john smith
    john smith Month ago

    yes I'm sure people are interested in getting your dna in a database, they would love to know who has the genetic markers for addiction to sell to game companies that also love microtransactions

  • Tanner Lynn
    Tanner Lynn Month ago

    I don't understand why you can't use some device that measures when it is touched to start a timer and start the domino chain wtih it and then have one at the end that when struck stops or records the time it was hit and just run one on felt and one on wood and see which wins

  • HeliumXenonKrypton
    HeliumXenonKrypton Month ago +1

    Try dominoes made of metal and run electricity through them to collect your data.

    • SirMeowric
      SirMeowric Month ago

      That's a good idea, but the dominoes can break contact after hitting each other. That prevents the continuous chain necessary for current. I thought about using capacitative dominoes that would discharge into each other, but that idea gets complicated fast when trying to measure when the voltage changes. If you build LEDs into them that light up briefly on contact, that would at least make it easier to view when they collide without having to move a camera along the chain. However, that would also make the domino material density non-uniform, which could affect their rotation. It's an interesting experimental problem.

  • Mak0_0kaM
    Mak0_0kaM Month ago

    or you could just curve the dominos and not move the camera

  • Timothy Swan
    Timothy Swan Month ago +10

    Lol. "They told me I could assume a cow is a sphere in a vacuum."

  • Mark Arnott
    Mark Arnott Month ago

    🤵Knowledge - only works when u dont need it - soon as i start a project blankety blank 😳 no2 why dominos fall ? diff its like icreams in a fridge or lollies Once u start - mayhem happens & chit goes down haa- hey😲 who ate all the lollies ?🐱‍🐉ride rex ride 💨🐨🎓💐

  • Simon Christopher
    Simon Christopher Month ago

    Who even dislikes this video?