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!
Get your first KiwiCo Crate for FREE!!!

Here is a great link to donate to help with Covid-19 aid-

Lae alla



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

    Mark RoberMark RoberAasta tagasi
    • Kk ,

      Maura MackMaura Mack26 päeva tagasi
    • Ok

    • 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

      monikamonikaМісяць tagasi
    • 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

      ahmad boybakamaruahmad boybakamaruМісяць tagasi
    • 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

      M Farhan PrasetyoM Farhan PrasetyoМісяць tagasi
  • You should do a paper airplane video

    Gavin RosenGavin Rosen10 tundi tagasi
  • Become a teacher Mark

    District PlusDistrict PlusPäev tagasi
  • Dude you are smarter than Einstein.

    Hi-tech gamerHi-tech gamer6 päeva tagasi

    ayden strandayden strand6 päeva tagasi
  • So are we not going to talk about how you didn’t put the weight directly over the balloon with 12 nails?

    Brian LaneBrian Lane8 päeva tagasi
  • I love how at the end he drank water to prove there were no holes 😅👌💯

    Talha NaveedTalha Naveed9 päeva tagasi
  • Tsunami on the sewers

    SunnyzinhoSunnyzinho10 päeva tagasi
  • I love Mark! Great job! Just curious - how many times did he say 'baby'

    Karol ZammitKarol Zammit14 päeva tagasi
  • I'm on the other side of the world watching this

    Eggy Slow moEggy Slow mo15 päeva tagasi
  • I bought a kiwico monthly crate got one 4/23/21 it is 5/31/21 and still waiting for the second one.

    Jake AdamsJake Adams16 päeva tagasi
  • I'm only 9 and I'm hearing this....

    Joleen WuJoleen Wu17 päeva tagasi
  • W-o-w

    Joleen WuJoleen Wu17 päeva tagasi
  • .................................

    Joleen WuJoleen Wu17 päeva tagasi
  • Teachers in school ain't got nothing on any of this

    Cody MooneyCody Mooney21 päev tagasi
  • 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.

    Meows for LifeMeows for Life21 päev tagasi
  • Cool😃

    Everett LechnerEverett Lechner23 päeva tagasi
  • im pretty sure he only pretended to drink the water and THAT'S WHY it didnt come out.

    a ja j23 päeva tagasi
  • Mark you are amzing

    Jennifer DinhJennifer Dinh24 päeva tagasi
  • Why didn’t I get this guy is my science teacher

    Hollis KellyHollis Kelly25 päeva tagasi
  • 👍🏻

    BABITA JAINBABITA JAIN25 päeva tagasi
  • Thxs Now I can cheat in class lol

    Skyler007 Play GamesSkyler007 Play Games25 päeva tagasi
  • So what you're saying is never make toilets compatible with Alexa. Headline: Hackers take down water treatment plants worldwide 🌐

    ZebbzzZebbzz25 päeva tagasi
  • 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....

    Remedy....Remedy....Місяць tagasi
  • isnt there a city in zimbabwe that does this all the time?

    J BJ BМісяць tagasi
  • Another youtuber did this with the same title but before you I sense a disturbance in the force

    Tomato_manTomato_manМісяць tagasi
  • Everybody gangsta till mark rober is your science teacher

    LimedinosaurLimedinosaurМісяць tagasi
  • At the end I was terrified that Mark would get hurt

    Natalie KarenNatalie KarenМісяць tagasi
  • This channel is slowly turning into Vsauce

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

    Joseph BartonJoseph BartonМісяць tagasi
  • I think you meant orientate. Orient is like Asia and stuff.

    Joseph BartonJoseph BartonМісяць tagasi
  • 1:51 that book costs a freaking 100 dollars in india

    152 Srikar Yendluri152 Srikar YendluriМісяць tagasi
  • It would be cool if Mark was my science teacher at the Co-op I go to but... The teachers there are moms/ women

    Ryan Woodhouse.Ryan Woodhouse.Місяць tagasi
  • 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

    Ace GgkspadeAce GgkspadeМісяць tagasi
  • Imagine all that poo coming at ya.

    Boo YeahBoo YeahМісяць tagasi
  • My science teacher is retiring next year you would be great

    Vickie DomkeVickie DomkeМісяць tagasi
  • Mark Rober: WELCOME TO- Mark Rober Fans: OK bye!

    MIM Gamer TVMIM Gamer TVМісяць tagasi
  • Can you be my science teacher

    Sharks r FunSharks r FunМісяць tagasi
  • What if we all slept at the same time? Even animals and bugs? Lol!!

    L GL GМісяць tagasi
  • Wsssawassssssxxssxswsss

    Feezor FamilyFeezor FamilyМісяць tagasi
  • It’s me

    Omar AzookariOmar AzookariМісяць tagasi
  • I’m literally watching this a little more than a year after and it still helps me!

    Ano Pro MaxAno Pro MaxМісяць tagasi
  • can i watch these insted of going to sience

    Ella TaylorElla TaylorМісяць tagasi
  • 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

    Riya TyagiRiya TyagiМісяць tagasi
  • 11:44 I can relate...

    MARK WONMARK WONМісяць tagasi
  • Going Vsauce here

    Bertha QuezadaBertha QuezadaМісяць tagasi
  • 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.

    Derrick hDerrick hМісяць tagasi
  • 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?

    Steve LambSteve Lamb2 місяці tagasi
  • :)

    Angel JonguitudAngel Jonguitud2 місяці tagasi
  • Ha ha yeah i speak german and french and you definiteley shouldnt repeat that lol 😂 22:42

    Jereimiah KnowlesJereimiah Knowles2 місяці tagasi
  • 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

    Amy M ElliottAmy M Elliott2 місяці tagasi
  • It would be nothing compared to how much chit genius dope tokers put on the Web "duh Russian collusion"

    edsnotgodedsnotgod2 місяці tagasi
  • It would destroy the earth’s rotation.

    Scott EdScott Ed2 місяці tagasi
  • I dont need sleep i need answers

    LapizLapiz2 місяці tagasi
  • 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?

    AdamAdam2 місяці tagasi
  • I wondered this if all my toilets in my house flushed at once cool

    Villa FGVilla FG2 місяці tagasi
  • We had this teles spark and i ordered kiwi co

    Z_bonzyzZ_bonzyz2 місяці tagasi
  • Lol the blood on your sweatshirt

    Chris MenzaChris Menza2 місяці tagasi
  • I ain't letting an elephant in my house. I feel like the women might no be as bad!

    SnalibeSnalibe2 місяці tagasi
  • As a wastewater operator, that would be a nightmare day.

    Kimberly De leonKimberly De leon2 місяці tagasi
  • but the elefant would break your door

    Charlie KayCharlie Kay2 місяці tagasi
  • 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.

    pjs5406pjs54062 місяці tagasi
  • You are awesome!

    Jesus StoutJesus Stout2 місяці tagasi
  • I really love how easy to understand the analogy is unlike others, + points to humor too.

    Kenji lolKenji lol2 місяці tagasi
  • 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.

    A ParsonA Parson2 місяці tagasi
  • 23:54 Yeah, this part can go wrong, unless you have plate armour under the trousers, be careful;)

    NetAndyCzNetAndyCz2 місяці tagasi
  • 13:08 This one really depends on how high the holes are above the ground.

    NetAndyCzNetAndyCz2 місяці tagasi
  • You asked which would you let in your house but said you were wrong if you said elephant....

    Janice MJanice M2 місяці tagasi
  • 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.

    Jim KirbyJim Kirby2 місяці tagasi
  • Hi Mark, in English we say "...everyone...he...." Furthermore the expression is "home in on" not "hone in on."

    Jim KirbyJim Kirby2 місяці tagasi
  • COOL

    Lauren BurleighLauren Burleigh2 місяці tagasi
  • The fabled atomic flush

    StrokeMahEgoStrokeMahEgo2 місяці tagasi
  • "You see hydraulics like this in a lot of Cases." You also see them in Caterpillars, Deere's, Komatsus...

    Q-tipQ-tip2 місяці tagasi
  • I learned more in this one video than all my years of school

    Nicholas MartinezNicholas Martinez2 місяці tagasi
    • ➡️ 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

      Angel TipanluisaAngel TipanluisaМісяць tagasi
  • thanks for your insprashon for toilets

    Aubrie WaizAubrie Waiz2 місяці tagasi
  • Nothing

    TjdTjd2 місяці tagasi
  • 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.

    Marc CatalanoMarc Catalano2 місяці tagasi
  • Hmm, I don't think that hole in your hoodie existed before you cushioned yourself in a bed of nails... Just sayin'

    StormwingStormwing2 місяці tagasi
  • i used that physics book in high school, lol

    Eugene McCalisterEugene McCalister2 місяці tagasi
  • And mark rover died in his nail experiment and was never seen again

    adit vallechaadit vallecha2 місяці tagasi

    Monika GalinskiMonika Galinski2 місяці tagasi
  • 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.

    lMagicalMerlinlMagicalMerlin2 місяці tagasi
  • 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

    Chris LeoneChris Leone2 місяці tagasi
  • I need a Mark Rober TV Show. Why hasn’t history channel or discovery signed you yet?!

    Jim FabianJim Fabian2 місяці tagasi
  • The eager doubt lamentably refuse because girdle realistically greet versus a hallowed female. thin, internal instruction

    Armon JArmon J2 місяці tagasi
  • Mark is the BEST

    HMHM2 місяці tagasi
  • Are you the coolest nerd, or the nerdiest cool guy on EEtvs?? I don't know, but I do know that everyone will know who Mark Rober is someday. 🤟keep inspiring the way you do

    Philip BeachPhilip Beach2 місяці tagasi
  • The cynical profit incidentally label because phone aesthetically stay from a slimy llama. stiff, dispensable jail

    Alex OrtizAlex Ortiz2 місяці tagasi
  • 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.

    Privacy ValuedPrivacy Valued2 місяці tagasi
  • Keep it up bro! Best videos I've probably ever seen.

    Robert TriggsRobert Triggs2 місяці tagasi
  • I'm 3:12 in & I've learned more than I have in the last 10 years....

    Victoria of the Victoria Victoria'sVictoria of the Victoria Victoria's2 місяці tagasi
  • 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.

    loe 73loe 733 місяці tagasi
  • Mr. Rober, now that I've seen your handwriting, I have to say.... Thank you for not going into family medicine.

    InservioInservio3 місяці tagasi
  • awww man i missed it mark can you make more videos like this (especially the kahoot part lol) stay smart, take care

    Matthew Roberts ( Student )Matthew Roberts ( Student )3 місяці tagasi
  • 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.

    Randolph TorresRandolph Torres3 місяці tagasi

    Randolph TorresRandolph Torres3 місяці tagasi
  • "And remember this is live ... So anything can go wrong"

    LPS Autumn2009LPS Autumn20093 місяці tagasi
  • He is like the modern bill nye

    John D'AngeloJohn D'Angelo3 місяці tagasi
  • Great job Mark! Thank you for putting on these classes!

    Nightmare Racing RCNightmare Racing RC3 місяці tagasi
  • Tomorrow's someone's birthday. Dropping a video would be a treat for us, even for the celebration.. Love you Mark. Happy birthday in advance.

    Ishuman ChaudharyIshuman Chaudhary3 місяці tagasi