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 RoberPrije godine

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

  2. Maura Mack

    Maura MackPrije 27 dana

    Kk ,


    BABITA JAINPrije mjesec


  4. monika

    monikaPrije 2 mjeseci

    WATCH MORE VIDEO F.U.L.L H.D 💓 CLICK HERE : livegirls19. com !💖🖤❤️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1&!/ 1618816732

  5. ahmad boybakamaru

    ahmad boybakamaruPrije 2 mjeseci

    𝐂𝐥𝐢𝐜𝐤 𝐇𝐞𝐫𝐞 ➜ livegirls19. com 》》 𝙊𝙣𝙡𝙮 𝘼𝙙𝙪𝙡𝙩 《《 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 來調味食物煮的時候%^%^ 1618815901

  6. M Farhan Prasetyo

    M Farhan PrasetyoPrije 2 mjeseci

    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---❤️😘 ..👍 Clickhere : livegirls19. com !💖🖤❤️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1 1618807730

  7. Fenrick Brandoff

    Fenrick BrandoffPrije dan

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

  8. Gavin Rosen

    Gavin RosenPrije dan

    You should do a paper airplane video

  9. District Plus

    District PlusPrije 3 dana

    Become a teacher Mark

  10. Hi-tech gamer

    Hi-tech gamerPrije 7 dana

    Dude you are smarter than Einstein.

  11. ayden strand

    ayden strandPrije 8 dana


  12. Brian Lane

    Brian LanePrije 9 dana

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

  13. Talha Naveed

    Talha NaveedPrije 10 dana

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

  14. Sunnyzinho

    SunnyzinhoPrije 11 dana

    Tsunami on the sewers

  15. Karol Zammit

    Karol ZammitPrije 15 dana

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

  16. Eggy Slow mo

    Eggy Slow moPrije 16 dana

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

  17. Jake Adams

    Jake AdamsPrije 17 dana

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

  18. Joleen Wu

    Joleen WuPrije 18 dana

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

  19. Joleen Wu

    Joleen WuPrije 18 dana


  20. Joleen Wu

    Joleen WuPrije 18 dana


  21. Cody Mooney

    Cody MooneyPrije 22 dana

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

  22. Meows for Life

    Meows for LifePrije 23 dana

    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.

  23. Everett Lechner

    Everett LechnerPrije 24 dana


  24. a j

    a jPrije 25 dana

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

  25. Jennifer Dinh

    Jennifer DinhPrije 26 dana

    Mark you are amzing

  26. Hollis Kelly

    Hollis KellyPrije 26 dana

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


    BABITA JAINPrije 27 dana


  28. Skyler007 Play Games

    Skyler007 Play GamesPrije 27 dana

    Thxs Now I can cheat in class lol

  29. Zebbzz

    ZebbzzPrije 27 dana

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

  30. Remedy....

    Remedy....Prije mjesec

    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....

  31. J B

    J BPrije mjesec

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

  32. Tomato_man

    Tomato_manPrije mjesec

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

  33. Limedinosaur

    LimedinosaurPrije mjesec

    Everybody gangsta till mark rober is your science teacher

  34. Natalie Karen

    Natalie KarenPrije mjesec

    At the end I was terrified that Mark would get hurt

  35. OriCraft

    OriCraftPrije mjesec

    This channel is slowly turning into Vsauce

  36. Joseph Barton

    Joseph BartonPrije mjesec

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

  37. Joseph Barton

    Joseph BartonPrije mjesec

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

  38. 152 Srikar Yendluri

    152 Srikar YendluriPrije mjesec

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

  39. Ryan Woodhouse.

    Ryan Woodhouse.Prije mjesec

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

  40. Ace Ggkspade

    Ace GgkspadePrije mjesec

    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

  41. Boo Yeah

    Boo YeahPrije mjesec

    Imagine all that poo coming at ya.

  42. Vickie Domke

    Vickie DomkePrije mjesec

    My science teacher is retiring next year you would be great

  43. MIM Gamer TV

    MIM Gamer TVPrije mjesec

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

  44. Sharks r Fun

    Sharks r FunPrije mjesec

    Can you be my science teacher

  45. L G

    L GPrije mjesec

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

  46. Feezor Family

    Feezor FamilyPrije mjesec


  47. Omar Azookari

    Omar AzookariPrije mjesec

    It’s me

  48. Ano Pro Max

    Ano Pro MaxPrije mjesec

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

  49. Ella Taylor

    Ella TaylorPrije mjesec

    can i watch these insted of going to sience

  50. Riya Tyagi

    Riya TyagiPrije 2 mjeseci

    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

  51. MARK WON

    MARK WONPrije 2 mjeseci

    11:44 I can relate...

  52. Bertha Quezada

    Bertha QuezadaPrije 2 mjeseci

    Going Vsauce here

  53. Derrick h

    Derrick hPrije 2 mjeseci

    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.

  54. Steve Lamb

    Steve LambPrije 2 mjeseci

    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?

  55. Angel Jonguitud

    Angel JonguitudPrije 2 mjeseci


  56. Jereimiah Knowles

    Jereimiah KnowlesPrije 2 mjeseci

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

  57. Amy M Elliott

    Amy M ElliottPrije 2 mjeseci

    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

  58. edsnotgod

    edsnotgodPrije 2 mjeseci

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

  59. Scott Ed

    Scott EdPrije 2 mjeseci

    It would destroy the earth’s rotation.

  60. Lapiz

    LapizPrije 2 mjeseci

    I dont need sleep i need answers

  61. Adam

    AdamPrije 2 mjeseci

    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?

  62. Villa FG

    Villa FGPrije 2 mjeseci

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

  63. Z_bonzyz

    Z_bonzyzPrije 2 mjeseci

    We had this teles spark and i ordered kiwi co

  64. Chris Menza

    Chris MenzaPrije 2 mjeseci

    Lol the blood on your sweatshirt

  65. Snalibe

    SnalibePrije 2 mjeseci

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

  66. Kimberly De leon

    Kimberly De leonPrije 2 mjeseci

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

  67. Charlie Kay

    Charlie KayPrije 2 mjeseci

    but the elefant would break your door

  68. pjs5406

    pjs5406Prije 2 mjeseci

    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.

  69. Jesus Stout

    Jesus StoutPrije 2 mjeseci

    You are awesome!

  70. Kenji lol

    Kenji lolPrije 2 mjeseci

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

  71. A Parson

    A ParsonPrije 2 mjeseci

    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.

  72. NetAndyCz

    NetAndyCzPrije 2 mjeseci

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

  73. NetAndyCz

    NetAndyCzPrije 2 mjeseci

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

  74. Janice M

    Janice MPrije 2 mjeseci

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

  75. Jim Kirby

    Jim KirbyPrije 2 mjeseci

    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.

  76. Jim Kirby

    Jim KirbyPrije 2 mjeseci

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

  77. Lauren Burleigh

    Lauren BurleighPrije 2 mjeseci


  78. StrokeMahEgo

    StrokeMahEgoPrije 2 mjeseci

    The fabled atomic flush

  79. Q-tip

    Q-tipPrije 2 mjeseci

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

  80. Nicholas Martinez

    Nicholas MartinezPrije 2 mjeseci

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

  81. Angel Tipanluisa

    Angel TipanluisaPrije 2 mjeseci

    ➡️ 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

  82. Aubrie Waiz

    Aubrie WaizPrije 2 mjeseci

    thanks for your insprashon for toilets

  83. Tjd

    TjdPrije 2 mjeseci


  84. Marc Catalano

    Marc CatalanoPrije 2 mjeseci

    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.

  85. Stormwing

    StormwingPrije 2 mjeseci

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

  86. Eugene McCalister

    Eugene McCalisterPrije 2 mjeseci

    i used that physics book in high school, lol

  87. adit vallecha

    adit vallechaPrije 2 mjeseci

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

  88. Monika Galinski

    Monika GalinskiPrije 2 mjeseci


  89. lMagicalMerlin

    lMagicalMerlinPrije 2 mjeseci

    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.

  90. Chris Leone

    Chris LeonePrije 2 mjeseci

    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

  91. Jim Fabian

    Jim FabianPrije 3 mjeseci

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

  92. Armon J

    Armon JPrije 3 mjeseci

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

  93. HM

    HMPrije 3 mjeseci

    Mark is the BEST

  94. Philip Beach

    Philip BeachPrije 3 mjeseci

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

  95. Alex Ortiz

    Alex OrtizPrije 3 mjeseci

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

  96. Privacy Valued

    Privacy ValuedPrije 3 mjeseci

    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.

  97. Robert Triggs

    Robert TriggsPrije 3 mjeseci

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

  98. Victoria of the Victoria Victoria's

    Victoria of the Victoria Victoria'sPrije 3 mjeseci

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

  99. loe 73

    loe 73Prije 3 mjeseci

    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.

  100. Inservio

    InservioPrije 3 mjeseci

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

  101. Matthew Roberts ( Student )

    Matthew Roberts ( Student )Prije 3 mjeseci

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

  102. Randolph Torres

    Randolph TorresPrije 3 mjeseci

    answering your and Dustins question is YES a solution I came up with 25 years ago because I asked that same question 30 years ago.

  103. Randolph Torres

    Randolph TorresPrije 3 mjeseci


  104. LPS Autumn2009

    LPS Autumn2009Prije 3 mjeseci

    "And remember this is live ... So anything can go wrong"

  105. John D'Angelo

    John D'AngeloPrije 3 mjeseci

    He is like the modern bill nye

  106. Nightmare Racing RC

    Nightmare Racing RCPrije 3 mjeseci

    Great job Mark! Thank you for putting on these classes!