SCIENCE CLASS #6- What if Everyone Flushed their Toilet at Once?

Let's talk about pressure! I WILL DO ONE FINAL CLASS NEXT WEEK, MAY 6TH!
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  1. Mark Rober

    Mark RoberPred letom

    Thanks for coming to class!! I WILL DO ONE FINAL CLASS NEXT WEEK, MAY 6TH!

  2. Catal

    CatalPred dnevom


  3. Hudson Elliott

    Hudson ElliottPred 2 dnevi


  4. lol

    lolPred 2 dnevi

    Please can you post everyday and reply to my comment

  5. Maura Mack

    Maura MackPred mesecem

    Kk ,


    BABITA JAINPred mesecem


  7. Jaunius Špokauskas

    Jaunius ŠpokauskasPred 5 urami

    thank you for sharing this information :)

  8. Stavan Jain, Music and games

    Stavan Jain, Music and gamesPred 7 urami

    this do be better than skool tho

  9. Stavan Jain, Music and games

    Stavan Jain, Music and gamesPred 7 urami

    mark:...answer important questions also him: what if everyone flushed at the same time?

  10. TimmyTube_9

    TimmyTube_9Pred 16 urami


  11. Catal

    CatalPred dnevom

    Let’s Go

  12. Fenrick Brandoff

    Fenrick BrandoffPred 4 dnevi

    Welcome to science class! I’m mark rover Well done captions

  13. Gavin Rosen

    Gavin RosenPred 4 dnevi

    You should do a paper airplane video

  14. District Plus

    District PlusPred 6 dnevi

    Become a teacher Mark

  15. Hi-tech gamer

    Hi-tech gamerPred 10 dnevi

    Dude you are smarter than Einstein.

  16. ayden strand

    ayden strandPred 11 dnevi


  17. Brian Lane

    Brian LanePred 12 dnevi

    So are we not going to talk about how you didn’t put the weight directly over the balloon with 12 nails?

  18. Talha Naveed

    Talha NaveedPred 13 dnevi

    I love how at the end he drank water to prove there were no holes 😅👌💯

  19. Sunnyzinho

    SunnyzinhoPred 14 dnevi

    Tsunami on the sewers

  20. Karol Zammit

    Karol ZammitPred 18 dnevi

    I love Mark! Great job! Just curious - how many times did he say 'baby'

  21. Eggy Slow mo

    Eggy Slow moPred 19 dnevi

    I'm on the other side of the world watching this

  22. Jake Adams

    Jake AdamsPred 20 dnevi

    I bought a kiwico monthly crate got one 4/23/21 it is 5/31/21 and still waiting for the second one.

  23. Joleen Wu

    Joleen WuPred 21 dnevom

    I'm only 9 and I'm hearing this....

  24. Joleen Wu

    Joleen WuPred 21 dnevom


  25. Joleen Wu

    Joleen WuPred 21 dnevom


  26. Cody Mooney

    Cody MooneyPred 25 dnevi

    Teachers in school ain't got nothing on any of this

  27. Meows for Life

    Meows for LifePred 26 dnevi

    I don't mean to sound to judgemental but I hope your teaching kids. If not I worry about our education system. On another note i feel saddened I didn't have a teacher like you.

  28. Everett Lechner

    Everett LechnerPred 27 dnevi


  29. a j

    a jPred 28 dnevi

    im pretty sure he only pretended to drink the water and THAT'S WHY it didnt come out.

  30. Jennifer Dinh

    Jennifer DinhPred 29 dnevi

    Mark you are amzing

  31. Hollis Kelly

    Hollis KellyPred 29 dnevi

    Why didn’t I get this guy is my science teacher


    BABITA JAINPred mesecem


  33. city Play Games

    city Play GamesPred mesecem

    Thxs Now I can cheat in class lol

  34. Zebbzz

    ZebbzzPred mesecem

    So what you're saying is never make toilets compatible with Alexa. Headline: Hackers take down water treatment plants worldwide 🌐

  35. Remedy....

    Remedy....Pred mesecem

    You would be the teacher that kids love, learn, & remember....More educators should teach this way. It would make school & learning not only way more fun but beneficial for all....

  36. J B

    J BPred mesecem

    isnt there a city in zimbabwe that does this all the time?

  37. Tomato_man

    Tomato_manPred mesecem

    Another youtuber did this with the same title but before you I sense a disturbance in the force

  38. Limedinosaur

    LimedinosaurPred mesecem

    Everybody gangsta till mark rober is your science teacher

  39. Natalie Karen

    Natalie KarenPred mesecem

    At the end I was terrified that Mark would get hurt

  40. OriCraft

    OriCraftPred mesecem

    This channel is slowly turning into Vsauce

  41. Joseph Barton

    Joseph BartonPred mesecem

    On Ice. Actually slamming your foot straight down increases the coefficient of friction on your shoes so your less likely to slip. Coool.

  42. Joseph Barton

    Joseph BartonPred mesecem

    I think you meant orientate. Orient is like Asia and stuff.

  43. 152 Srikar Yendluri

    152 Srikar YendluriPred mesecem

    1:51 that book costs a freaking 100 dollars in india

  44. Ryan Woodhouse.

    Ryan Woodhouse.Pred mesecem

    It would be cool if Mark was my science teacher at the Co-op I go to but... The teachers there are moms/ women

  45. Ace Ggkspade

    Ace GgkspadePred mesecem

    I was thinking they wouldn’t flush because of the increasing pressure in the pipes it eventually just wouldn’t let you flush but I guess if it was at exactly the same in theory lol that would be bad

  46. Boo Yeah

    Boo YeahPred mesecem

    Imagine all that poo coming at ya.

  47. Vickie Domke

    Vickie DomkePred mesecem

    My science teacher is retiring next year you would be great

  48. MIM Gamer TV

    MIM Gamer TVPred mesecem

    Mark Rober: WELCOME TO- Mark Rober Fans: OK bye!

  49. Sharks r Fun

    Sharks r FunPred mesecem

    Can you be my science teacher

  50. L G

    L GPred 2 meseci

    What if we all slept at the same time? Even animals and bugs? Lol!!

  51. Feezor Family

    Feezor FamilyPred 2 meseci


  52. Omar Azookari

    Omar AzookariPred 2 meseci

    It’s me

  53. Ano Pro Max

    Ano Pro MaxPred 2 meseci

    I’m literally watching this a little more than a year after and it still helps me!

  54. Ella Taylor

    Ella TaylorPred 2 meseci

    can i watch these insted of going to sience

  55. Riya Tyagi

    Riya TyagiPred 2 meseci

    But doesn't the pad of the heel create more surface area? Ohh i guess the person wearing heels puts the heel down first, oh no

  56. MARK WON

    MARK WONPred 2 meseci

    11:44 I can relate...

  57. Bertha Quezada

    Bertha QuezadaPred 2 meseci

    Going Vsauce here

  58. Derrick h

    Derrick hPred 2 meseci

    When you said you were wrong by a factorof ten percent, did you mean you were RIGHT by a factor of ten percent? Because the weight of the elephant is distributed over a larger area.

  59. Steve Lamb

    Steve LambPred 2 meseci

    But you didn’t explain how all the zorbies ended up in the pipes. Did he tip a few bags of them into a drainpipe or something?

  60. Angel Jonguitud

    Angel JonguitudPred 2 meseci


  61. Jereimiah Knowles

    Jereimiah KnowlesPred 2 meseci

    Ha ha yeah i speak german and french and you definiteley shouldnt repeat that lol 😂 22:42

  62. Amy M Elliott

    Amy M ElliottPred 2 meseci

    Which one WOULD you let in your house or not let in your house? Cuz elephant would be preferred over the heals, right? Then if you said elephant then you're right! Right? Cuz the elephant distributes pressure seeing that it has a greater distribution. Right? So, was that just a mistake? Or am I confused? 3:53

  63. edsnotgod

    edsnotgodPred 2 meseci

    It would be nothing compared to how much chit genius dope tokers put on the Web "duh Russian collusion"

  64. Scott Ed

    Scott EdPred 2 meseci

    It would destroy the earth’s rotation.

  65. Lapiz

    LapizPred 2 meseci

    I dont need sleep i need answers

  66. Adam

    AdamPred 2 meseci

    You showed pressure with a tub of water vs a 2liter of water and the pressure looked the same. So If one goes into a large pool 10 feet below and feels the pressure in their ears, would one feel the same pressure if they went 10 feet deep into an area of water only 5x5 wide?

  67. Villa FG

    Villa FGPred 2 meseci

    I wondered this if all my toilets in my house flushed at once cool

  68. Z_bonzyz

    Z_bonzyzPred 2 meseci

    We had this teles spark and i ordered kiwi co

  69. Chris Menza

    Chris MenzaPred 2 meseci

    Lol the blood on your sweatshirt

  70. Snalibe

    SnalibePred 2 meseci

    I ain't letting an elephant in my house. I feel like the women might no be as bad!

  71. Kimberly De leon

    Kimberly De leonPred 2 meseci

    As a wastewater operator, that would be a nightmare day.

  72. Charlie Kay

    Charlie KayPred 2 meseci

    but the elefant would break your door

  73. pjs5406

    pjs5406Pred 2 meseci

    Did you misspeak about who to let in house elephant or woman, or did I misunderstand? You said if you chose elephant your wrong by a factor of 10, but then go on to explain how the floors would get damaged 10m times more easily with the heels than an elephant.

  74. Jesus Stout

    Jesus StoutPred 2 meseci

    You are awesome!

  75. Kenji lol

    Kenji lolPred 2 meseci

    I really love how easy to understand the analogy is unlike others, + points to humor too.

  76. A Parson

    A ParsonPred 2 meseci

    I would give this man any 5th grade class in the world. When you're learning, and having fun it's full on 5th grade. My 5th grade teacher had us building balsa wood gliders and para balloons.....we had sharp scissors, sharp knives, and created amazing things. I went through three years of math in the 5th grade because we were hands on with proven designs. We got to spend more time in the field than any other class in my school..... I got so lucky by being in that teacher's space.

  77. NetAndyCz

    NetAndyCzPred 2 meseci

    23:54 Yeah, this part can go wrong, unless you have plate armour under the trousers, be careful;)

  78. NetAndyCz

    NetAndyCzPred 2 meseci

    13:08 This one really depends on how high the holes are above the ground.

  79. Janice M

    Janice MPred 2 meseci

    You asked which would you let in your house but said you were wrong if you said elephant....

  80. Jim Kirby

    Jim KirbyPred 2 meseci

    Mark, now that you've explained pressure, you should explain that what people call a "high-pressure shower head" is really a "low-pressure, high-velocity shower head" in accordance with Bernoulli's Theorem.

  81. Jim Kirby

    Jim KirbyPred 2 meseci

    Hi Mark, in English we say "...everyone...he...." Furthermore the expression is "home in on" not "hone in on."

  82. Lauren Burleigh

    Lauren BurleighPred 2 meseci


  83. StrokeMahEgo

    StrokeMahEgoPred 2 meseci

    The fabled atomic flush

  84. Q-tip

    Q-tipPred 2 meseci

    "You see hydraulics like this in a lot of Cases." You also see them in Caterpillars, Deere's, Komatsus...

  85. Nicholas Martinez

    Nicholas MartinezPred 2 meseci

    I learned more in this one video than all my years of school

  86. Angel Tipanluisa

    Angel TipanluisaPred 2 meseci

    ➡️ livegirls19. com ⤵️ B.e.S.T f'u"l'l D.a.T.i.n.G h.o.T G.i.r.L's -L-o-V-e-S-e-X---❤️😘 ..👍 !💖🖤❤️今後は気をライブ配信の再編ありがとうです!この日のライブ配信は、かならりやばかったですね!1万人を超える人が見ていたもん(笑)やっぱり人参最高!まさかのカメラ切り忘れでやら1かしたのもドキドキでした,. 💖🖤在整個人類歷史上,強者,富人和具有狡猾特質的人捕食部落,氏族,城鎮,城市和鄉村中的弱者,無`'守和貧窮成員。然而,人類的生存意願迫使那些被拒絕,被剝奪或摧毀的基本需求的人們找到了一種生活方式,並繼續將其DNA融入不斷發展的人類社會。. 說到食物,不要以為那些被拒絕的人只吃垃圾。相反,他們學會了在被忽視的肉類和蔬菜中尋找營養。他們學會了清潔,切塊,調味和慢燉慢燉的野菜和肉類,在食品市場上被忽略的部分家用蔬菜和肉類,並且學會了使用芳香的木煙(如山核桃,山核桃和豆科灌木 來調味g食物煮的時候 1618747332

  87. Aubrie Waiz

    Aubrie WaizPred 2 meseci

    thanks for your insprashon for toilets

  88. Tjd

    TjdPred 2 meseci


  89. Marc Catalano

    Marc CatalanoPred 2 meseci

    Correction water is barely compressible, but even at just the bottom of the ocean the water is a tiny bit more compressed then at the top.

  90. Stormwing

    StormwingPred 3 meseci

    Hmm, I don't think that hole in your hoodie existed before you cushioned yourself in a bed of nails... Just sayin'

  91. Eugene McCalister

    Eugene McCalisterPred 3 meseci

    i used that physics book in high school, lol

  92. adit vallecha

    adit vallechaPred 3 meseci

    And mark rover died in his nail experiment and was never seen again

  93. Monika Galinski

    Monika GalinskiPred 3 meseci


  94. lMagicalMerlin

    lMagicalMerlinPred 3 meseci

    Havn't read the comments... anyone else notice this looking like it was shot in the 80s? Almost certain it's the brick wall background.

  95. Chris Leone

    Chris LeonePred 3 meseci

    I already know what happens because I conducted an experiment with my siblings when I was 6 or 7 years old where we flushed all three of our toilets at once. Your mom will yell at you and you won't be allowed on your PS2 for at least a week

  96. Jim Fabian

    Jim FabianPred 3 meseci

    I need a Mark Rober TV Show. Why hasn’t history channel or discovery signed you yet?!

  97. Armon J

    Armon JPred 3 meseci

    The eager doubt lamentably refuse because girdle realistically greet versus a hallowed female. thin, internal instruction

  98. HM

    HMPred 3 meseci

    Mark is the BEST

  99. Philip Beach

    Philip BeachPred 3 meseci

    Are you the coolest nerd, or the nerdiest cool guy on SLthrow?? I don't know, but I do know that everyone will know who Mark Rober is someday. 🤟keep inspiring the way you do

  100. Alex Ortiz

    Alex OrtizPred 3 meseci

    The cynical profit incidentally label because phone aesthetically stay from a slimy llama. stiff, dispensable jail

  101. Privacy Valued

    Privacy ValuedPred 3 meseci

    The elephant would literally become the elephant in the room and while my floors would be fine, the rest of the residence would cease being a residence. Just ask the lady to take her shoes off when she enters the residence or don't let either one in and then there's no problem.

  102. Robert Triggs

    Robert TriggsPred 3 meseci

    Keep it up bro! Best videos I've probably ever seen.

  103. Victoria of the Victoria Victoria's

    Victoria of the Victoria Victoria'sPred 3 meseci

    I'm 3:12 in & I've learned more than I have in the last 10 years....

  104. loe 73

    loe 73Pred 3 meseci

    thanks mark, for showing that schools can incorporate more interactive and engaging learning. Rather than giving students a thick text book, a load of assignments, and expect them to learn efficiently and last in their heads.

  105. Inservio

    InservioPred 3 meseci

    Mr. Rober, now that I've seen your handwriting, I have to say.... Thank you for not going into family medicine.

  106. Matthew Roberts ( Student )

    Matthew Roberts ( Student )Pred 3 meseci

    awww man i missed it mark can you make more videos like this (especially the kahoot part lol) stay smart, take care