> temp > à-trier > counterintuitive-direction-of-water-going-out-a-rotating-spout-steve-mould-smartereveryday

Which Way Will the Water Go? (ft. Steve Mould)- Smarter Every Day 226

SmarterEveryDay - 2019-10-13

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Warm Regards,

Destin

T3 Tedwards - 2019-10-13

Steve is a really smart guy if you ignore the British accent"

*angry tea clink noises*

Komen Cents - 2020-12-14

@T3 Tedwards I Believe he's a yank. I don't suppose there's any convincing him... even if the president told him himself😂

Komen Cents - 2020-12-14

@d@r$h@n CF force is acting on the pipes, not the water, since the water isn't in a centrifuge. As you'll notice, it's travelling the centrepetal path hence why you see the centrifugal illusion. (Ie the water shoots to the middle therefore passing the middle and passes the outer circumference... not because it's spinning)

Komen Cents - 2020-12-14

@Oleander410 you don't even know how to pronounce R's. Actually... Asian people pronounce it more accurately than Americans . Funny

Komen Cents - 2020-12-14

@ratoncito it's spelt English. Yes we speak English in England. And we also understand American

ratoncito - 2020-12-15

@Komen Cents please translate first. Thank you.

Cody'sLab - 2019-10-14

Ok now I want to know if this will do the same with lasers instead of streams of water. I assume a much greater rotation rate will be required.

John Garfitt - 2021-01-17

@Malte If you image light pulses emitted from the tips of the sprinkler each pulse is emitted from a different location since the sprinkler is turning, but the photon travel in straight lines once they are emitted. The light pulses would appear to fall behind the nozzles that emitted them.

Curtis Warren BTW STOP BEGGING - 2021-02-06

Yes, if you make it spin faster than the speed of light...

John Garfitt - 2021-02-07

The beam of light will fall behind the rotating laser. The amount of lag will be noticable further away from the center the slower the rate of rotation.

David Houser - 2021-02-13

If you wonder who blew up Pluto it wasn't me

Victoria Eads - 2021-03-18

If you shine the lasers through a medium such as ice or frosted glass, you might have an effect that's easier to observe. The speed of light is, after all, only constant in a vacuum...

The Flying Dutchman - 2019-12-27

This is what I love about scientists: Admitting when you’re wrong and rejoice in finding out the truth.

Marko B - 2020-07-08

Unfortunately globers will never ever admit they were wrong.

Roland Riviere - 2020-07-15

The Flying Dutchman And the way Destin goes about it, it turns into a life lesson beyond a science lesson.

Mchael Lima - 2020-10-27

@Rick White yes, not all professors are arrogant

Wyatt - 2021-01-22

Well nowadays that’s not the case, most mds and scienctidys who study medicine and expose the truth are labeled as delusional and conspiracy theorists.

gsftb - 2021-02-22

@Rick White yes of course I have had lessons with those kind of professors and I am grateful for this

Nikko J - 2019-12-30

9:57 Stop, collaborate and listen. You've just learned the first lesson of Vanilla Ice.

Vít Salava - 2020-06-04

underappreciated comment :D

Luigi Macaraig - 2019-12-14

"In a way the science is often a long, slow, passive-aggressive argument."
-zefrank1

Avocado Toast - 2021-02-01

Zefrank1 is a God

Aaron Eighmey - 2019-12-09

For that first disagreement, you were just using different frames of reference lol

philipp diez - 2019-12-25

I am not sure.. bc Destin claims to have meant a single particle yet he talks about a curve

Amberionik - 2020-04-24

Yep

The Publix - 2020-06-10

Classic engineers smh, throwing frames out willy nilly

Sam A - 2020-10-20

@philipp diez Dustin is mixing up his frames of reference. A stationary arm only makes sense to the single particle for multiple particles you need to consider all the arm positions.

Trace Chaffin - 2019-10-14

The British version of saying “I disagree and you’re wrong” is “that’s interesting” 😂

mradhayuda1 - 2019-12-21

Interesting, its so plite

Adrian Slattery - 2020-06-14

I wish it was. Love this channel

Ross Wilson - 2020-07-29

My American friend's dad uses "Interesting, if true"

CommissionerSleer - 2020-12-21

I think I know I mean a yes
But it's all wrong
That is I think I disagree

Matthew Briggs - 2021-01-16

"That's really interesting!" flips this paradigm on its head and conveys genuine and enthusiastic interest. That is unless the shithead now has an exaggerated tone of sarcasm on their voice.

Yora - 2019-12-08

I would love to see it with the image rotating at the same rate as the arms, so that the perspective changes to a rotating reference frame.

John Barron - 2019-12-09

Each water jet would appear to be in a fixed position in space, as long as the sprinkler head angular velocity is maintained constant.

Daniel Olmedo - 2019-12-24

@John Barron Thats pretty much the coriolis effect if im not mistaken.... a curving force appears lineal because of a rotating frame of reference.

mrkiky - 2020-01-04

@John Barron But the lets would still appear to be curving which would look cool.

John Garfitt - 2021-01-16

A photo taken from a rotating frame and a photo taken from a stationary frame would be indistinguishable. A video taken from a rotating frame would show fixed arms with the water curving behind the arm (in the first case) and ahead in the second case.

Aravindh SM - 2021-03-12

You would see it moving away from you in a straight line.

Aiden Losh - 2019-12-20

This reminds me of Tom Scott's video where he was in a giant centrifuge and they were throwing a ball across it and it curved the same way.

Michael Goddard - 2020-10-16

9:08 starts the most important 1 minute and 10 seconds of SmarterEveryDay humanity life lesson. I share this with my students every year so they get to hear it at least 3 times and hopefully we ingrain a life skill about perspective, rational thinking, humility, and empathy. I give Dustin a standing ovation on this one!

Bob Hoffer - 2020-10-21

you said it better than I could...bravo!

Inside Interpreting - 2021-01-27

Destin

Tamo 33 - 2019-12-10

This is the “can you curve a bullet” problem but with water

dagman85 - 2019-12-19

Sure you can curve a bullet. Shoot it upward, and it will curve back down eventually. :)

m1ckyg21 - 2019-12-20

@930 8323 that's the point

Stewart Foreman - 2019-12-22

Coriolis effect says that it will be impossible to curve a bullet, unless you have it spinning like a baseball that curves. But because bullets spin like footballs they cant spin/curve sideways.

Tlaloc_Temporal - 2020-04-03

@Stewart Foreman -- Rifle bullets don't curve, that what the rifling is for. Musket balls curve all the time, that's why they suck.

Rusty Shackleford - 2020-06-15

There are guns that shoot in a 90 degree bend of a gun, but the bullet will still travel forward unless you were to move fast enough, in which case water was moving at a rate, and the hose was moving at a rate, you'd need to scale up everything, for the direction of your movement of the barrel of the gun to implement a "curve" but it'd be forward+yoursideward movement in a straight line, diagonal, so there wouldn't be a curve, like the water drop shown. Tlaloc_temporal is right, projectiles curve all the time, but to implement your own curve would have to be intentional and not due to your movement of the barrel, unless you want to move the bullet diagonal.

KRU's Den - 2019-10-13

Destin: is a rocket engineer

Also Destin: "Sidewards Velocity"

xn85d2 - 2021-02-02

@Derek Kumagai And what deserves credit for your intellect then? Also, why are you assuming he has not subjected that belief to criticism?

Derek Kumagai - 2021-02-03

@xn85d2 I don't credit anything, let alone something that isn't demonstrable.

xn85d2 - 2021-02-03

@Derek Kumagai OK, so your answer is "I have no idea" and yet you think your position is superior to someone who does have an answer. Besides, the existence of a first cause is entirely demonstrable, it's just that people don't like to accept it.

YouTube Account - 2021-02-24

@Derek Kumagai while you uncritically credit yourself? Or some ancient mud puddle?

Derek Kumagai - 2021-02-25

@YouTube Account No, you're entirely missing the point. I am making no assertion that I nor humanity owes anything to an entity that hasn't been demonstrated to even exist. If I were to claim that a magical dragon is the source of my and/or humanity's intelligence, then I would be open to the same line if criticism.

Luke Betterton - 2019-12-24

This was an amazing video with a really important message. This is so incredibly important in this day and age. Proud of you, Destin.

Nathan Muirhead - 2020-01-19

Absolutely! :-)

Markus Brunner - 2019-12-08

The real question is why is one leg of the tripod on the ladder....

yao dave - 2019-12-11

So the camera is pointing down

InsatiableMonkey - 2020-06-04

Tripods often have limits to their range of motion that necessite odd leg angles in order to make the camera point in an unusual direction (like straight down).

Dale Cadman - 2019-12-27

My best friend and I have spent a life time of friendship angrily agreeing about the same things.

The Humphreys - 2020-01-31

Thanks for taking an interesting physics question, interpreting with humility, and turning it back on yourself in an honest and personal way. You're the best !

Tom Lischke - 2019-12-06

Steve is a really smart guy if you ignore the British accent

talks in alabama

Volatile 100 - 2020-07-29

@John Peric It's pretty funny. Statistically, people in the south are no more inclined to incest than people in the north.

Mr. Pink - 2020-10-12

@Dimmy shut

Sun Rabbit - 2020-10-19

They say that the toothbrush was invented in Alabama because had it been invented anywhere else it would be called a TEETH brush.

William M. Buttlicker - 2020-10-30

Maybe some of the terms he uses, but he doesn't really have a strong southern accent. Where I live in NC, people have a drawn out southern accent.

Connor Nugent - 2021-01-31

lmfao

Barje. Waffles - 2020-03-11

When you say "I know", you are actually saying "I refuse to think any further".

Chris Musix - 2020-01-01

"Knowledge puffs up while love builds up." ~1st Corinthians 8:1

Rider Mak - 2019-12-29

I’m 61 and I learned the same thing about myself when I was about your age. You’re right on schedule. 🥴😉

Stephen Broadfoot - 2019-12-14

Hey Destin, video request!


In the book "Surely you're joking Mr Feynman" at the end of the chapter of the same name, Feynman describes an experiment he did with spinning water pipes. In the experiment, he sets up an S shaped pipe and forces water through it and asks, which way will the pipe spin? Then asks the question, if instead, the whole thing were submerged in water, and we suck water through the S shaped pipe, which way will the pipe spin? Unfortunately, the chapter ends with him breaking some Princeton equipment and we don't get to find out which way it spins! I think this would be an awesome follow up video to make!

Buko - 2019-12-10

Thank you, this has made me look at a personal problem very differently.

Logan Grove - 2020-01-02

Steve has a way underrated channel

F S - 2019-12-28

Great video. The biggest learning for me was “listen”

biggles258 - 2019-12-27

"Steve seems like a pretty smart guy if you can look past the British accent"? Cheeky sod, Destin :)

R M - 2020-06-04

Destin seems a pretty smart guy if can look past his pronunciation of the word Marquis (Maa•kwuhs). British author British book, British pronunciation please good sir!. I hope french people call him (Dee•Stan)

John Thomas - 2019-11-09

Destin sneakily teaching everyone vector addition lol

Mikal Gibbs - 2020-11-05

@Wam My you can breakdown the vectors of multiple angled vectors and then combine them with Pythagorus though

Jesse Davis - 2020-11-19

The whole time I was thinking. It wasn't going to spin because the forces cancel out rather than creating spin.

Blue Flash - 2020-11-20

Vectors are just basic points of direction.

Each row can be represented by a linear function on a 2D plain or 3D space. It's is nothing more than adding

g(x) = 2x + 4
f(x) = -1x +10
j(x) = 4

That is basically a vector.
If you want to describe a matrix, you just add more variables as the matrix grows.

Gahor Hadid - 2020-12-07

Shhh don't let the arts students know xD

LocalBox Crox - 2020-12-12

Y do u ppl act like 8th graders?

Michael Antonio - 2021-02-13

0:36 Burnnnn!!! But honestly Dustin, Steve definitely has more intellect than you. However, I think that you have more book smarts.

Brendan Wright - 2020-05-21

His shirt literally says "Be Nice"

Neil Gregory - 2020-06-13

That part at the end was such wisdom I swear. I’ve learned the same thing, you’ll at least find some common ground

john harsh - 2021-03-22

I just started watching your channel, so I've gone back to watch all of your older videos. Sorry if someone already mentioned this, but you left out the centrifugal force on the water while coming out of the spout. If you spun the sprinkler hard enough, no water would come out because the centrifugal force would be stronger than the pressure, but anything in between causes the weird motion.

Manuel Pilarczyk - 2019-10-13

When the two smartest kids in class have different answers.

Fran Durrieu - 2019-10-14

Even better the smartest ones have different but the teacher puts you wrong and you were right so you correct her and both the smartest ones get rekt

Ben Sessions - 2019-10-14

@sean riopel When I was getting college credit for a trigonometry class in high school, there was this question on a test where I technically followed the instructions and wound up with a correct answer, but my high school teacher didn't like the way I interpreted the question and marked it wrong. I went back to him to show him my logic and why I was right, but he said it wasn't what wasn't what was being asked for and that he would submit it to the professor through whom we were getting college credit for. A week later he sheepishly admits that it counts and that he was wrong. That felt so good.

Sl4yerkid - 2019-10-14

And then the smarter smartest kid who already knows which one of the two 'smart' kids is right before hearing their answers.

Joey Temme - 2019-10-14

Well you were wrong around the 4 minute mark.. you said it will curve. But hey you recognized this and commented on it at the end of the video so that's great.

sean riopel - 2019-10-14

@Ben Sessions I had a similar experience with a Engineering Drafting class. We had to take 3 serperate views of an object (orthographic) and draw the 3-d viewpoint. I ended up getting a slightly different answer than the entire class and marked wrong. After showing my Prof. I proved that his side views were in fact ambiguous and could lead to either interpretation. That gave me a severe ego boost.

John Snow - 2020-05-02

when Steve said: it's called Mould Effect, did you jealous of him? ^_^

rayraymartineziii - 2020-06-01

The question was "what does the snapshot look like?"

P8qzxnxfP85xZ2H3wDRV - 2019-12-10

Ugh, this video actually wasn't about toilets?

Ian Stoufflet - 2019-12-14

Id like to see an elaborate set up with a bunch of these

Carolina mud Reaper - 2019-10-14

The fact you flew to england to play with a sprinkler in someones garden😂

Rickardo Pandiangan - 2019-10-17

In the of sains

Hello Kitty Lover Man! - 2019-10-17

....is... what?

Karan Checker - 2019-10-17

Anything for content which gets viewed nearly a million times ... in 4 days

Spear Shaker - 2019-10-18

True love knows no bounds.

Komen Cents - 2020-12-14

You have no idea what a self aware genius will do to prove his genius right. (But will never admit their genuisness)
Trust me when one spoke about getting a stick and pivot big enough to move the earth... one wasn't joking lol

Patrick Robles - 2019-12-08

As long as you keep to be humble yourself, you continue learning
That's what my perspective on your last explanation =)

Terry - 2021-03-04

"Oftentimes I get pretty headstrong." Like, headstrong enough to fly across the Atlantic to prove a point? Haha
I love the banter. You might speak funny, but we love you, America.

Ty Kaneshiro - 2020-10-08

Lol I watched this when it first came out. Almost a year feels fast to me.

davide bogliun - 2021-02-04

This is called coriolis effect lol O studyed this at high school when I was 15 years old😂

supernumex - 2019-10-13

The premier feature makes me really disappointed when i click on a video :(

CamaroZ28Nut3 - 2019-10-13

@Frostyflytrap The creator CHOOSES whether they use the system or not, so in the comments is a perfectly valid place to voice concerns/dislikes. 95% of the creators I watch DO NOT use the stupid premiere system. It's not forced on them like you're seeming to imply. If I can't watch the video, then don't tell me about it. I don't want to know that a video has been completed and uploaded, but I'm not gonna be given the privilege of watching it till tomorrow because reasons. And I think the fact that the comments are numerous enough, and upvoted enough to push down comments about the actual video's content is the only way Destin may be convinced to stop using one of the most loathed features Youtube has ever come up with. I agree it's no reason to dislike the video, but commenting on the use of a disliked optional feature, and/or upvoting comments about aforementioned feature is perfectly reasonable.

Chris Martin - 2019-10-13

It makes me disappointed when it makes my watch Later playlist stop

Nothing To See Here - 2019-10-13

It is not strange to 'target' the person that chose to use the unwanted feature. YouTube does not make anyone use it. The timer is optional. This is not a problem with YouTube, it is a problem with the creators choice to use it.
No comments have been 'silenced', either.
You very clearly said that people should not be commenting on how the video was released. This is the comment section for the video, it is the exact right place for these comments. The only attempts at silencing, or discussion of things that don't belong here are coming from you.

Patrik - 2019-10-13

Here here. Destin, please don't do this.

Fear Monger - 2019-10-24

I ended up proving my point too. Until someone liked my comment, I had actually forgotten about Destin's video

iam Zifoe - 2019-12-13

I had Steve's same reaction when you said the water would go forward instead of trail backwards.

FlyinRaptorJesus - 2019-12-17

8:17 illuminate confirmed

SoandSewClothesandFabric - 2020-08-21

Oh wow! I thought that it was trailing, and I was so confused when destin said it wasn’t. But now I get it! It looks like it is, but instead it’s going in a strait line forward. I love this!

Boris M - 2019-12-30

I just love good arguments, and good argument is every argument that you learn from.

Golden Duck - 2019-10-13

It's been said that no one likes the premier feature.

Chris Martin - 2019-10-13

It wouldn't be so bad if playlists if playlists could skip the premier videos instead of just stopping.

Looking at you, Watch Later

Chris Martin - 2019-10-13

@SigmayerStillClosed
"It's more likely to lower the view count."
According to the people posting videos, it seems to have the opposite effect.

space - 2019-10-13

Having been on the other side of this sort of decision now I can guarantee that someone looked at metrics probably include view counts and ctr that made them think premiers make the platform better. Probably even given the way people use them.

Kali Takumi - 2019-10-13

@SigmayerStillClosed I don't think I've ever thought a premiere was an uploaded video due to the massive premiere block at the bottom of the thumbnail.
At the same time, all the premieres I've watched have had the uploader in the chat so it was cool to interact and ask questions about the video while it's playing

Spoiler Alert - 2019-11-02

Simply watch the video after it premiers... natural selection is coming for you soon

strategic fooyou agency first agent - 2020-08-31

god,I'm so smart. first time when I see this, I know the water is forward from the tube. because inner circle spin slower than outer.the water shoot from outer has the outer speed. so looks like forward form the jet point.

Sam Dawe - 2020-02-15

This is the best conclusion statement I've ever heard. Humble and self deprecating.

sophia tremblay - 2020-12-07

the same thing happens with "Flat Earth" guys!

Keith Waggoner - 2021-02-26

That’s why I’ve always try to listen more and speak less... Wish an “ex” friend of mine had done the same... We might still be friends.