The Truth About Toilet Swirl - Northern Hemisphere

  • Опубликовано: 3 июн 2015
    Both videos on one page (for desktop):
    Subscribe to Veritasium:
    ↓↓↓↓↓↓↓More info Below ↓↓↓↓↓↓↓

    Some notes about this.
    We each repeated the experiment 3 times, and got the same results every time. For those of you who might be skeptical, great! The good news is that right circularly prismatic kiddie pools are only $10 and you can do the experiment for yourself at your latitude. There's really no reason you shouldn't do this on your own, so before you criticize how we've done it, I'd strongly encourage you to do it for yourself.
    Smarter Every Day Instagram:
    Patreon Support Link:
    Veritasium on Instagram:
    Patreon Support Link:
    Gordon McGladdery did all of the sound design for the video. We used two songs from other artists (licensed of course). Derek split the first one up so it fades from video to video, and Gordon split the instruments up on the second one. There are violins on one video and percussion on the other for example. It's really neat.
    The neat earth animation at the beginning and the synchronizing timer was made by He also made still images of the earth from the top and the bottom.
    Thanks to Jacob Vehrs for helping make the plywood pool platform.
    There was a study performed at MIT years ago ( that explained the physics involved. We repeated some of these demonstrations, but on opposite sides of the globe…and in a way that can be easily understood.
    This site is a great resource on the Coriolis effect and ways people have gotten it wrong:
    The Coriolis Effect influences the flight of a bullet.
    We would love for someone to replicate this demonstration. Please tweet your results to us @SmarterEveryDay and @Veritasium.
    Here's the link to puchase the exact same pool:
    Tweet ideas to me @SmarterEveryDay
    The thought is it will help educate the world as a whole, and one day generate enough revenue to pay for the kids' 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!
    If you REALLY liked it, feel free to pitch a few dollars towards their college fund by clicking here:
    Warm Regards,
  • Наука и техникаНаука и техника
  • Длительность: 8:02
  • Smarter  Every  Day  Science  Physics  youtube edu  Education  Math  Smarter Every Day  experiment  nature  demonstration  slow  motion  slow motion  education  math  science  science education  be smart  edu science  what is science  Physics of  projects  experiments  science projects  coriolis effect  toilet swirl  australia  Coriolis  Fluid Dynamics  

Комментарии: 5 960

  • MrFlippy Music
    MrFlippy Music День назад

    I hope that you find the other sid
    Is this making any
    If it actually is, reply to this comm

  • Bob Johnson
    Bob Johnson 8 дней назад

    You already admitted it was random, and sometimes it rotates clockwise and sometimes it rotates counterclockwise.
    One time is not a sufficient sample size.
    repeat the experiment 100 times.
    Then get back to us.

  • Farisan Hafizh
    Farisan Hafizh 10 дней назад

    I liked and commented this video and the other one at the same time

  • Gibson Kevin
    Gibson Kevin 11 дней назад

    Now for some really cool effects Im going to watch it upside down.

  • Half Elf Gaming
    Half Elf Gaming 15 дней назад +1

    this is cool

  • Nicholas James.S
    Nicholas James.S 16 дней назад

    what an absolutely incredibly display of science, and film making merging flawlessly. by far the best video i have ever seen on youtube by far with no exaggeration.

  • Kevin Houston
    Kevin Houston 22 дня назад

    SmarterEveryDay: I don't see how you can, logically or reasonablly, maintain a swirling Coriolis Effect on a globe where the overall atmosphere is not even independent of the landsphere in it's midst. Afterall, globalists MUST maintain that both the landsphere & atmosphere are moving at the exact same speed. If the atmosphere were not moving, at all, then the landsphere would cause anybody, who is standing on it's surface, to experience as much wind resistance as the speed-of-spin is at his or her geological location. If standing at the Equator, then about a 1,000mph of wind resistance would be generated as the landsphere moved you against the still air in the atmosphere. It would be like trying to stand on the wing of a futuristic jet that can travel at the speed of 1,000mph. This is why globalists MUST maintain that both the atmosphere & landsphere move together at the same rate of speed. If there was even the slightest difference, between the two, then stillness of air could NEVER be experienced on a globe and the swirling Coriolis would have a cause and ever be in effect because of it. However, stillness of air is QUITE OFTEN experienced all over the world. It doesn't even matter if the Equator is moving faster than, per se, the Tropics (Cancer & Capricorn) because the amount of land to speed-of-spin ratio, experienced at every line of latitude, in the whole landsphere, is equal in proportion to every other part. It has to be because it is connected, thereby, allowing no excess force to be experienced (from the overall unit thereof) when transitioning between differing speeds in differing geological locations. The same would, alikewise, be true for the overall atmosphere. Since the amount of air to speed-of-spin ratio, experienced at every line of latitude, in the whole airsphere is equal in proportion to every other part. It has to be because it is connected, thereby, allowing no excess force to be experienced (from the overall unit thereof) when transitioning between differing speeds in differing aerospace locations. And since so called: "outerspace" consists of no substance, at all, then the atmosphere would receive no frictional resistance on it's convexed outer rim from that. Nonetheless, it's concave underside, being a thick gaseous air fluid, would interlock with the landsphere's round ridgity surface (like a bike chain on a sprocket) and, therefore, would allow no kind of swirling motion (or Coriolis Effect) to be experienced (from the overall conjoined unit thereof) when transitioning between differing speeds in differing landsphere-to-atmosphere connected locations. This is because they are married & interlocked as a conjoined unit themselves. Though one is harder than the other, they are conjoined & propelled together at the exact same speed. Such would allow for isolated disturbances (due to other factors) but never as a direct cause of their overall union. This leaves the swirling Coriolis Effect with no CAUSE! So in order for you to continue maintaining the false notion, you will have to dream of a slightly offset atmosphere-to-landsphere connection by which absolute stillness of air is never experienced on the face of the whole globe (even though, in reality, stillness of air is often experienced all over the world in many different locations). Nonetheless, you absolutely can NOT have it both ways, Sir!!! And finally, here is a video of two whirlpools draining side-by-side but in opposite directions to one another --- --- Furthermore, the world's record sniper shooter mentions many variables but the Coriolis Effect is not one of them --- --- Please don't let your pride cause you to give a dishonest response, Sir.

  • jesokingcryst
    jesokingcryst 23 дня назад

  • Nessi
    Nessi 26 дней назад

    Rip Mobile

    ABZ SWAGGER 28 дней назад

    Whoa that’s so cool. I just put it next to my computer and the ending was so good

  • Joe B
    Joe B 28 дней назад

    I guess the Coriolis effect works on pools.

  • Noorquacker
    Noorquacker 29 дней назад

    Dang, these are some great videos

  • Kai
    Kai Месяц назад

    this was cool to watch with dual monitor setup :D

  • PecoraSpec
    PecoraSpec Месяц назад

    !rehtraetalf emos ezeeuqs nac i yllaniF
    !enola ssel leef em ekam ytisoiruc ruoY !eromyna derob ton m'i won ,tenretni eht no derob saw i elihw uoy dnuof I
    !sguh isewkcolcretnuoC

  • camillebroccoli
    camillebroccoli Месяц назад

    bestfriend goals

  • Cameron Stebbins
    Cameron Stebbins Месяц назад

    This was the most impressive use of Youtube I have ever seen. So creative!

  • jacob almond
    jacob almond Месяц назад

    got this synced up perfect! awesome experience!

  • Gabriel Frisch
    Gabriel Frisch Месяц назад


  • Champy heteromer
    Champy heteromer Месяц назад

    oh man this is so cool

  • Bhargava Jaisimha
    Bhargava Jaisimha Месяц назад

    I have been subscribed to both your channels from quiet some time.
    You guys make some of the most interesting videos on youtube and I'm a huge fan!!!!
    loved the concept of the whole double vid thing!!! (probably the best way to make a colab. vid!)

  • Raphael Wedd
    Raphael Wedd Месяц назад

    The Simpsons did it.

  • cput leader
    cput leader Месяц назад

    what happen if it was on equator? i from malaysia

  • Luqman Mohiuddin
    Luqman Mohiuddin Месяц назад

    Did you try in the Southern Hemisphere?!?! Just to be 100% sure

  • Bp1033
    Bp1033 Месяц назад

    Wow, I never watched a video(s) that let me utilize my dual monitor setup in such a way. it was neat.

  • Tyler Berg
    Tyler Berg Месяц назад

    will honey coil in the opposite direction?

  • Miguel Diaz
    Miguel Diaz Месяц назад

    o.m.g destin so the corialis is real!!!!!!

  • mike s
    mike s Месяц назад

    1. the way the toilet swirls, is due to the way its manufactured. Its designed to allow the liquid to flow to one side first, then rotate around the rim. 2. inconsistent silicone, or what ever sealer you used in the center of the pool, to seal the exit port, will alter the flow too. It needs to be a machined part for accuracy.

  • Danielle Jones
    Danielle Jones Месяц назад


  • RattyCZ
    RattyCZ Месяц назад

    its awsome!

  • Jonathan Pilic
    Jonathan Pilic Месяц назад

    wow, awesome collaboration and at the time the subject is interesting.. the main thing is when I play both video synchronized my mind blow. I'm speech less this is new level.. it makes me giggle. I'm already watching and subscribes both smartereveryday and veritasium. thank you both of you and I/we expect more interesting science video in the future. applause....

  • Brandon Poole
    Brandon Poole Месяц назад

    Can you try it at the equator?

  • EpicJimm
    EpicJimm Месяц назад

    coolest video colab i've ever watch :)

  • TorahTV
    TorahTV Месяц назад

    The truth is that this is Bullshit

    • Syahadatul Hidayat
      Syahadatul Hidayat 18 дней назад

      at least try to do an experiment to debunk this rather than talking bullshit

  • transparent lemon
    transparent lemon Месяц назад

    How does this have more views than the other?

  • TheDoctor 40
    TheDoctor 40 Месяц назад

    its 1:18 am... It pays to stay up late.

  • Wheeled salmon
    Wheeled salmon Месяц назад

    its awesome how when you stop talking he starts idk i think its cool

  • rakerholm
    rakerholm Месяц назад

    Oh my god. This ACTUALLY gave me goosebumps!

  • PalmaKotStube :D
    PalmaKotStube :D Месяц назад

    In Germany the water is going straight down no swirl

  • Mr Awesome
    Mr Awesome Месяц назад

    anyone who has drained a bathtub knows this lol

  • Brew Bear Brewer
    Brew Bear Brewer Месяц назад

    Mind blowing video! Even with just the effects of having two videos synchronized! Wow!

  • Jonahs Channel
    Jonahs Channel Месяц назад

    Pedophile: Hey, Kid, Come over here, I got some candy!
    Kid: Yay! *eats candy*
    Pedophile: Want some more candy?
    Kid: Yeah!
    Pedophile: Follow me then!
    Kid: Okay!
    Pedophile: *brings kid to the woods then knocks him out*
    Pedophile: YES YES
    Pedophile: I GOT SOMETHING SPECIAL FOR YOU MWAHAHA *brings to school*

  • x1RoBoT3x
    x1RoBoT3x Месяц назад

    So if I'm understanding this correctly, if this experiment were to be conducted on the equator, you would produce a portal to another dimension?

  • Tymen Vds
    Tymen Vds Месяц назад

    this is one of the most amazing and well thought out video i have ever seen than you

  • Daniel Smartt
    Daniel Smartt Месяц назад

    I'd be interested to see the same experiment done on the equator

  • daniel ramirez
    daniel ramirez Месяц назад

    Love your channel I've got a question. Why wouldn't the water go the opposite way the Earth is rotating? You know like the force you feel in a car when going forward doesn't push you forward it sends you back in your seat. Can you please explain that to me?

  • Jonny Couillard
    Jonny Couillard 2 месяца назад

    When they see the colored water they will be like what's happening there and call the police

  • Death squad
    Death squad 2 месяца назад

    Spinn it the other way when you put it in

  • Gabriele Di Carlo
    Gabriele Di Carlo 2 месяца назад

    Sync it up!

  • Xrexgamer1
    Xrexgamer1 2 месяца назад

    I watched this on my iPad and the other on my phone

  • kiran muralee krishnan
    kiran muralee krishnan 2 месяца назад

    awsome mann..!!! awsome..!! the sync video..!! dope.!!!

  • xXNeoKennyXx
    xXNeoKennyXx 2 месяца назад

    First of all, I really liked this collaboration. But I have one question you did not touch. So if would put a perfect symmetric pool with the drain directly on the equator and did the experiement again. Would i technically see no rotation?

  • Mandarin DRAGO
    Mandarin DRAGO 2 месяца назад

    yeah but y u have to put ur head into toilets ............ just let the camera do the dirty job

  • Mike Ketterman
    Mike Ketterman 2 месяца назад

    You should be able to predict this in calculation. It's been years (Decades?) since I used dimensional analysis, but if it is repeatable in nature, it should be seen in calculation. Maybe your math friends could do it?

  • Danny Moore
    Danny Moore 2 месяца назад

    Check this out....
    It's sooooooo cool....

  • Aditya Vijj
    Aditya Vijj 2 месяца назад

    what would happen at the equator

  • Ron Hummel
    Ron Hummel 2 месяца назад

    A lot of you fell for this...hahaha. They didn't open that valve all the way on that pool for a reason. It should of been parallel with the pipe. Flip valve around and that water will probably swirl the other way.

  • Jimmy Berry
    Jimmy Berry 2 месяца назад

    Try this with a straight drain pipe down, no bends.

  • John H.
    John H. 2 месяца назад

    No, not real

  • Adam Orick
    Adam Orick 2 месяца назад

    Was that a copper drainage

  • alaskanalain
    alaskanalain 2 месяца назад

    Does the corriolis effect apply to hair? Which way does your hair grow, with a swirl to the left or right? Which hemisphere do you live in?

  • Ian C Boyd
    Ian C Boyd 2 месяца назад

    Oh My Gosh!!! This is so cool. Please try to do more of these! If you can...It would be so much fun for the other viewers as well I'm sure.

  • Frosty Face
    Frosty Face 2 месяца назад

    I Liv win Australia and it spins both ways like there is a double hurricane

  • Anastasiya Stacey
    Anastasiya Stacey 2 месяца назад

    But wait.... shouldnt it be clockwise for north and anti for south?

    • Kel Duck
      Kel Duck 2 месяца назад


  • Grass Snaker
    Grass Snaker 2 месяца назад

    In Europe we don't have swirls at all, as we do not have lots water in toilet. Americans waste water! :D

  • Kyle Rnm
    Kyle Rnm 2 месяца назад +1

    What happen in the equator? Pleae make it a video

  • Saad MAFiA
    Saad MAFiA 2 месяца назад

    ent, come over here!!!

  • 8bit72HAC
    8bit72HAC 2 месяца назад

    Lol imagine having these videos flipped and having them look in the wrong directions at the end. That would be pretty funny

  • 8bit72HAC
    8bit72HAC 2 месяца назад

    This is really freaking cool

  • Marc
    Marc 2 месяца назад

    That was the coolest way of watching a YouTube science video I've ever experienced, exept the end xD

  • videosaala
    videosaala 2 месяца назад

    This is about sleep direction with respect to hemisphere!
    As a child I was told not to sleep with my head facing North (in India).. always wondered why!! Thought it was superstition... until I learn facts from experiments like yours!! Thanks for making us SED!

  • Jacques Homme
    Jacques Homme 2 месяца назад

    I´m a Brazilian school teacher and I´m involved to create here in my country a educational alliance based on Youtube.
    You probably won´t believe on me, but nowadays we're facing troubles with flatearthers, in the most they are creationists and b YoungEarth believers, actively trying to destroy our already poor educational level.
    I'd like to have your authorization to use parts of your video on a video-lesson I'm preparing. I have no intention of any profit with such video, but it'll be a honor to refer your excellent material.
    I hope for your authorization...
    My best regards
    Prof. Jacques Homme

  • Gator 157842
    Gator 157842 2 месяца назад

    Take that flat earth

  • BrokenWatchYT
    BrokenWatchYT 2 месяца назад

    its creepy cus i got them in perfect sync and i put this one on the left and the other on the right.

  • Robert Nikkel
    Robert Nikkel 3 месяца назад

    that was awesome!

  • zog zog
    zog zog 3 месяца назад

    No they do not rotate in different directions. All that has happened is that you have looked at the same thing from a different point of view. Imagine this: You hold an open an faced clock in your hands. The second hand extends past the circumference of the face, it rotates clockwise. Now you turn the clock around so you see the back of it. The hand appears to rotate counter-clockwise. But it has always rotated in the same direction! Now imagine this. On the North Pole and the South Pole are two circular swimming pools with a plug for drainage in the center. You stand above the earth at a point directly above the North Pole. Because the Earth rotates in the same direction the swirl will be the same. Looked at from the other direction ie 'below' the South Pole they will appear to rotate in the opposite direction, but the swirl in the North Pool and in the South Pool will be rotating in the same direction - the same direction as when you looked from above the North Pole.

  • alberto matarrita
    alberto matarrita 3 месяца назад

    stupid video, not serious.

  • LMX YT
    LMX YT 3 месяца назад

    My toilet doesn't swirl 😞

  • j walt
    j walt 3 месяца назад

    That was awesome the sync was so kool

  • Krish Sanj
    Krish Sanj 3 месяца назад

    61k like here 62k there. 4.7k comments here and 4.8 comments there

    • Krish Sanj
      Krish Sanj 3 месяца назад

      2.4m view here and 2.2m view there

  • ZeR0Neon
    ZeR0Neon 3 месяца назад

    Did you see my comment on the other video?

  • Kieranstans
    Kieranstans 3 месяца назад

    This is incredible

  • Todd Krueger
    Todd Krueger 3 месяца назад

    okay, these videos were pretty sweet!

  • Adrian Soto
    Adrian Soto 3 месяца назад

    Great videos guys!!! I really enjoyed the sync.

  • rushthezeppelin
    rushthezeppelin 3 месяца назад

    I think same as with the average toilet or tub there are other forces that tend to do alot more for the rotation of hurricanes than the coriolis effect. You have to consider also that not all hurricanes and cyclones spin their same respective ways. One other thing, it's MUCH easier and cheaper to prove the coriolis effect with some long range shooting :)

  • Desert Lizard
    Desert Lizard 3 месяца назад

    how about a pool in the equator, which way will the water swirl?

  • Jon Ross
    Jon Ross 3 месяца назад

    You need both videos to get the whole dealm but there are still a 200k difference in view count :P

  • Terius Zúñiga
    Terius Zúñiga 3 месяца назад

    I add my favorite videos from you both to different playlists dedicated to each of your channels. What do I do now? Guess I'll have to comment in both videos as well xD

  • Dave Kooper
    Dave Kooper 3 месяца назад

    One of the best youtube gimmicks so far!

  • Noureldine Celery
    Noureldine Celery 3 месяца назад

    I got an ad during this

  • jchinckley
    jchinckley 3 месяца назад

    I subbed to both long before this (these) video(s).

    • jchinckley
      jchinckley 3 месяца назад

      Or maybe I didn't. I did sub long before I saw either video (of course). I was unaware that they existed, so I think maybe my first comment is incorrect. Maybe. I'm not sure.

  • prashant sharma
    prashant sharma 3 месяца назад


  • 薛陳月美
    薛陳月美 3 месяца назад

    I'm my home my toliet just... goes.... down

  • Dedra Kuhn
    Dedra Kuhn 3 месяца назад

    bart simpson caused an international incident with australia over a huge phone bill because he was asking a boy there which way the water swirled

  • Masterplane!
    Masterplane! 3 месяца назад

    its a shame people come across these channels when new to flat earth, I can see why levels of cognitive dissonance are so high. .

  • FlareTech
    FlareTech 3 месяца назад

    reply to me on both videos with the same comment

  • The Moore Clan
    The Moore Clan 3 месяца назад

    Checkmate Flat Earthers.

  • Yuanyuan Qu
    Yuanyuan Qu 3 месяца назад

    this is cool.

  • bonsaiforu
    bonsaiforu 3 месяца назад

    I will.

  • Andre Feliciano
    Andre Feliciano 3 месяца назад

    AWESOME Video collaboration is soo dope

  • Greg Esterlund
    Greg Esterlund 3 месяца назад

    If the earth is spinning at around 700 to 1000 miles a hour, depending where you are, why can't the affect be seen outside of the car also?
    I always believed that the electromagnetism of the earth and the "left hand rule" come into play with the spin?
    Great channel, thanks