Why Your Pee Looks Like A Chain

[@SteveMould]

The bad medical advice at the end comes from Medlife Crisis. You should visit his channel here: kzbin.info The sponsor is Blinkist - The first 100 people to go to blinkist.com/stevemould​ will get unlimited access for 1 week to try it out. You'll also get 25% off if you want full membership.

[@RyanWaldroop]

Love that Dr. Francis is googling Matt Parker. 😂

[@thesmiffable]

I absolutely ended myself when Rohan answered the phone, and even more when he started nonchalantly whistling

[@UltraGamma25]

.... too much pressure for that to happen

[@MedlifeCrisis]

@@RyanWaldroop Actually I was using Bing

[@RyanWaldroop]

@@MedlifeCrisis Dang! I thought it might have been bing, but it sounds funny to say you're binging Matt Parker. I was more concerned you were using Internet Explorer.

[@ElectroBOOM]

No literature on it? Then let's call it Mould Effect #2!

[@rektangel333]

i dont even know what to say other than hi and first

[@jonathanvanhyning3344]

There is something concerning about a "Mould" in my urine.

[@cat-.-]

Mould grand effect Mould little effect Mould last effect

[@SteveMould]

Works for me!

[@rancidmarshmallow4468]

how about the steve effect then?

[@Masquerola]

SmarterEveryDay: Laminar flow is my favorite! Veritasium: No, turbulent flow is better! Steve Mould: why is my pee a chain

[@rajkr7j]

Haa😆😆 I'm also thinking same.

[@danjtitchener]

@MARI It's a P-wave!

[@nineball039]

In 11 dimensions (give or take) it's a p-brane.

[@FlashDrive356]

XD

[@thegrandestbazaar4800]

Yes

[@MystDawg]

As a huge fan of both physics and piss this appeals to me greatly

[@007liammurphy]

Donald Trump approves of one of your interests

[@Spanky00Cheeks]

@@007liammurphy people love being lied to.

[@007liammurphy]

@@Spanky00Cheeks you are a handsome man and people like you

[@Spanky00Cheeks]

@@007liammurphy now I feel like must feel. :) Orange man is gone. And while Orange man is bad, there are worse men and women out there. No. Just men. My bad.

[@littlejackalo5326]

@@Spanky00Cheeks waaaaaa. Haven't seen and feminists that are men in the comments before.

[@Love-and-Salt]

This man has just become the pouring liquid expert at this point and I’m here for this extremely niche content

[@MedlifeCrisis]

So good to see you up and about

[@augustgames6502]

😂

[@FlorianFahrenberger]

Please tell me that Steve didn't even tell you what his fictional "condition" would be in the bit, and just had you vamping on about something vague. :-D

[@bracco23]

The phone cable not attached is a great touch!

[@SteveMould]

I think I'm going to pull through

[@huraqan3761]

Eyyyyyy (◠‿◕)

[@FanOfAwesome1]

The shape resembles a chain. I'd call it a water chain, and address each "pinch" as a waterlink.

[@MikeSchwirian]

Came to say the same.

[@NickCombs]

good idea, but it should happen in any fluid with surface tension, not just water

[@reptarien]

First thought was that it looked chain-like. Completely agree, that's what it most resembles

[@cgromo]

That's what it's called in some fluid simulation papers, see Two Minute Papers' episode on a relatively recent simulation technique that can accurately simulate water chains: kzbin.info/www/bejne/iamsnISqZZmKedE

[@jerrymiller276]

The Mould liquid chain effect. Does he have a thing about chains?

[@tdude3212]

Rohin looking at picture of Matt, and his phone line being physically disconnected are the best parts of the bit. Solid colab :)

[@zerid0]

Aren't we all looking at pictures of Matt on our free time? :D

[@mheermance]

I didn't notice that the handset wasn't connected. Thanks for pointing it out.

[@benhbr]

Duh, it's a cordless phone

[@funtechu]

It completely caught me off-guard. Fantastic cameo, and way better than just having some random person pretend to be a doctor.

[@scottwatrous]

The fact that the wire was not plugged in immediately caught me off guard lol

[@58209]

"Let's approach as closely as possible to the Platonic Ideal of a stream of pis--" This is the single greatest line in the entire history of KZbin videos.

[@AHustleIsLikeASideOfFries]

I bet the KZbin demonetizer was like, 'YES! I got you now!... D'oh!"

[@FatalShotGG]

Mhm, sure...

[@gallitagen5224]

1:53

[@13_cmi]

It’s even more funny when people cut out things like this. You know what it is but it cuts off right before it happens. That’s way better than not cutting it off

[@Tuberduber1]

1:55

[@latergator9622]

I love how you perfectly emulate the “disheveled but still functioning look”

[@MrEDMeaner]

Emulate? Haha

[@ryant1626]

Right? Like a homeless millionaire lol

[@johnbox5013]

He works hard at the stuff he does. Proper presentation with a team of people to help.

[@latergator9622]

@Smee Self to match or surpass. Look up sactimonious.

[@answersteslaqueries6712]

@@latergator9622 TIL there is an adjective for the act of virtue signaling

[@Elitematt74]

Some say if you repeat "Laminar flow" three times in a mirror, Destin appear behind you...

[@LeglessWonder]

Is there a way to run laminar flow thru snatch blocks? He’d be in heaven lol

[@moorhen6156]

I heard if you say it 5 times you'll find a Chinese tea pot somewhere near by

[@kaidenschmidt157]

“The platonic IDEAL of a stream of pi-“

[@mirzaahmed6589]

Very strictly platonic.

[@onetwoBias]

That part really cracked me up! 😂

[@noahbehnke]

YES! 1:58 I had to pause because I was laughing so hard.

[@fenrirab620]

I see an R.Kelly experiments

[@Siberius-]

0:20 - "PUSHING water out of your body". That's interesting phrasing, but less interesting since I already found out that many people can't pee by just relaxing and letting it flow out by itself (unless they are busting). They have to actually push, to expel the liquids, otherwise nothing comes out. Now, to get the last tiny bit out, one will have to push a bit either way, so both sides have a bit of each other's situation going on to a minor degree lol. How beautiful.

[@jekizer]

"This video is not about laminar flow." > Destin has left the chat

[@olimpather]

> Veritasium has joined the chat

[@Abel19129]

HAHA thats a good one xD

[@zyansheep]

> Captain Disillusion has opened blender

[@fluffigverbimmelt]

Just about to post this, nice

[@makius1400]

KZbin nerds are the best

[@GediMini]

the British KZbinr cinematic universe is getting out of hand... And I love it!

[@user-vn7ce5ig1z]

KZbin is more incestuous than _Game of Thrones._ _Worlds are colliding! George is getting upset!_

[@WhatColourIsYourBugatti_]

Americans....

[@dashquinnten6346]

@@WhatColourIsYourBugatti_ living rent free in your head

[@Chaunton]

"Let's approach, as closely as possible, the platonic ideal of a stream of pi-." Love it.

[@anonymousranter2583]

Glad I wasn't the only one who noticed!

[@alansouthall8221]

So good

[@Mobilesuit413x]

This is also my favorite part.

[@massimookissed1023]

Stream of π

[@paullove5238]

Ive always considered myself to be of an analytical mindset. I'm always looking at things and trying to understand how they work. But the problem I always have is then explaining what I am now able to understand. But I love that your out here doing the homework for us and really answering the big questions that need answering. Love your channel. I look forward to learning something new Everytime I click on one.

[@WhatColourIsYourBugatti_]

10:53 Casually staring at a picture of Matt Parker, then picking up a telephone that isn’t even connected. Feels like the start of an adult film...

[@freescape08]

Didn't even notice the phone was disconnected until your comment, that makes it even better.

[@MikkoRantalainen]

And the "Oh, and Steve, it's been good knowing you, man. Take care." was the cherry on the cake.

[@terrygoyan]

Wife: "What the heck are you doing in the bathroom?" Man: "Experimenting!"

[@sjcaljames]

Lol

[@DFPercush]

"So that's why you needs a ruler... suuure"

[@Metal_Master_YT]

now, wouldn't it be normal to *be in the bathroom* while you pee? "what the heck are you doing in the bathroom?" "using it... what else would I be doing?"

[@diynevala]

Science cannot be stopped! I need more beer to continue this endeavour!

[@cice7076]

I like how its wife and man, as opposed to wife and husband

[@finhornby8556]

why not describe the shape as a chain? This 90° alternation is reminiscent of the way chain links interlock.

[@Jesse__H]

Yeah that makes sense.

[@djmintyfreshful]

things can have many descriptions.

[@martinfisker7438]

I was also thinking of a chain wrapped in celophane

[@rederaz2509]

"Chain" is exactly what I was thinking

[@maolmhuire]

I came to the comments to describe this shape as a shrink-wrapped chain.

[@timelsen2236]

Steve Mould is the science bomb of all You Tube. He always has the unusual not found anywhere, with intuitive explanations easy to follow. All schools should study Steve's work.

[@squigglypeterson7157]

I've tried for years and years to find out the real reason of it and what it is called. Thank you for your perseverance!

[@pauliemac5814]

I noticed from the time I was a young adult that my stream was helical and discussed it with friends but no one else seemed to have taken any notice of their stream. I’ve always described my “anatomy “ as having rifling, like the inside of a gun barrel. I love that this video now exists. Thanks for making it Steve. Now I better go get my affairs in order I guess.

[@KOZMOuvBORG]

Can identify your "Inner Gun" by checking the twist on the rifling.

[@moondust2365]

Reminds me of a certain someone saying they "charge rifle" peed lol.

[@krashsytegaming9222]

What kind of bullets do you piss? .22? .50?

[@envar1]

Wasn’t sure if your video’s quality before watching, but I can say that this video is very well made. Job well done!

[@MattAndImprov]

Thank you! I've literally Googled whether urethras are rifled.

[@mikieswart]

would be nice if they were! might actually get that first second of stream into the bowl and not… everywhere else but

[@mduckernz]

Ribbed for his/her pleasure? ;p

[@bedi3983]

@@mduckernz you dont fuck a urethra

[@corbeaudejugement]

@@bedi3983 sounding

[@scvpest]

@@bedi3983 YOU don't fuck a urethra

[@mu11668B]

I actually ran into the explanation of this phenomenon when I was taking a course about fluid dynamic in college. This is the correct solution! I remembered the professor showed us a model simulation under laminar flow assumption (which apparently holds in this case as the shape is almost constant in Eulerian frame of reference).

[@sontapaa11jokulainen94]

Your professor also used a piss stream as an example?

[@mu11668B]

@@sontapaa11jokulainen94 Ofc not lol. It was just a fun example of shaped nozzle.

[@sontapaa11jokulainen94]

@@mu11668B XD

[@davisdiercks]

"We need laminar fl-" * Destin materializes out of thin air * You summoned me?

[@Metal_Master_YT]

YEAH XD

[@mikek6298]

That and snatch blocks

[@qutaara3454]

Lol, I could see Destin's face Popping into the screen right when he mentioned the word "laminar"

[@alanwatts8239]

Huh, that's weird. My pee has always made a sharp U-turn right, two lefts, stopped for about a minute mid air, then it comes back and circles around me five times before finally entering the toilet. Thought everyone peed like this.

[@johnbaker1256]

Troublesome in high winds.

[@chuck9693]

Bruh

[@FC_Dobbs48]

Thank you for answering a question I have pondered intermittently for about 60 years, often while standing out in the wilderness. How did this slit spout opening producing this chainlike stream evolve? Or was it significant for the other fluid emitted from this spout?

[@josephsshitpostemporium4325]

I think it might have to do with symmetry in our bodies. It's between your legs so it gets squeezed on the side and grows vertically due to less restraint

[@RealKlausSchwab]

I was just pondering this phenomenon last month.

[@RealKlausSchwab]

I think it's due to the shape of the "nozzle" and surface tension of the liquid.

[@jacobpugpoirier3350]

@@josephsshitpostemporium4325 symmetry

[@josephsshitpostemporium4325]

@@jacobpugpoirier3350 My bad. Typo.

[@Ruffaloo]

Quarantine day 336: "Why does my pee look like a chain?"

[@mduckernz]

@Richard Joyce Ugh, Qdroids even here. Go away.

[@EliteGeeks]

Euler's force, with the Coriolis force, makes the entangled stream known to me an Oscillating Undulation the action of moving smoothly up and down.

[@MS-me6fv]

@@EliteGeeks is it normal?

[@EliteGeeks]

@@MS-me6fv ( clarified.... ) to me yes...

[@MS-me6fv]

@@EliteGeeks what do you mean "to you" ? Is it not normal to others?

[@EmoAdam0312]

Idk why the algorithm recommended me this video, but honestly......not disappointed. Made it pretty damn entertaining.. I loved the doctors skit.

[@pedromms8908]

Same here! I guess youtube knew I was in a urge to pee

[@chady51]

Yes love PISS

[@ObeyTheLaw7]

Hey, I have a question. If you started this experiment in lab conditions but really really high up, would the stream ever finally oscillate into a perfect circular shape? If so I think it would prove your hypothesis!

[@wfzero]

This was the comment I was hoping to find!

[@simpleman5494]

I think it would end in droplets before you could see that. Maybe it's possible with fluids of different viscosity like oil..

[@lagarttemido]

Maybe in vacuum.

[@mylittlepony7477]

If we could make acceleration due to gravity 0 then maybe the experiment is possible Or else the stream will just turn turbulent

[@JordHaj]

@@mylittlepony7477 or split up into droplets

[@SthamerAMVs]

Anyone else get excited when Steve Mould appears in your notifications?

[@Slabsticktwitch]

I immediately started peeing helical.

[@AttilaAsztalos]

I feel like I should be but by the time it happens I keep forgetting this channel exists.

[@djmintyfreshful]

@@Slabsticktwitch I usually pee in the complex plane, a phasor if you will.

[@miigon9117]

"the faster you pee the longer the wave length" That's exactly what I want to know from science courses. EDIT: 400 likes? does that mean I’m legally in the “famous internet people” club now?

[@afrog2666]

Didn`t he say it`s NOT like the faster you pee the longer the wave length..?

[@techpriestsalok8119]

@@afrog2666 9:45 listen for fifteen seconds at this point.

[@mechamicro]

More like beat slower. With lower angular velocity

[@Enerjy]

@Hand Grabbing Fruits That's a very interesting observation! I'm guessing this person somehow got _`_ and _'_ mixed up. Because the only time you use _'_ is when there is a quote within a quote. _`_ is pretty much only used in programming languages.

[@Enerjy]

@Hand Grabbing Fruits haha nice

[@thefriendorthefoe]

1:57 "The platonic ideal of a stream of pi-" ANYWAY, moving on now

[@andrewjvaughan]

a brand new sentence for the world right there

[@303elliott]

Best part of the whole video

[@JoeTaber]

The platonic ideal of demonetiz-

[@user-vn7ce5ig1z]

Bahntonio> "The platonic ideal of a stream of pi-" The correct Greek pronunciation of π is /pee/, so your cut-off is still family-friendly. 🤷

[@xtimes3952]

pi

[@TraceDominguez]

I can't believe it took me 3 years to find this

[@DaVoKanfr]

Laminar flow? I bet that smarter everyday will comment in less than 5 days.

[@sacalius_papalagius]

he needs to get out of the submarine first.

[@jeremyturner2873]

Maybe he'll bring his #SNATCHBLOCK!

[@joratto2833]

inb4 smarter everyday

[@YPOC]

Haha I had the same thought! :D

[@jasonenns5076]

I no longer have laminar flow... Ever since I became a teenager it is all chaotic flow now.

[@xiaofan4503]

Helical pee streams can have disastrous effects on aim. As the pee pulls inwards, conservation of angular momentum makes it spin *faster*. When the stream breaks into droplets down the line, individual droplets sometimes end up with a lot of linear momentum. Under the right conditions, the end of the stream turns into a kind of spray. @steve I think I can see the beginnings of this at the bottom of your helical stream demonstration, but your video just barely cuts off the breaking up of the stream.

[@Jefe_D._Jefes]

Mmmhmmm yes, can confirm, have sprayed the wall next to my toilet many a time.

[@FYAHWEHL]

Never in my life I’ve seen anyone talk about pee in such a way

[@FYAHWEHL]

Never in my life I’ve seen anyone talk about pee in such a way

[@dhsora95]

I can't wait for this guy to get old He's gonna be such a perfect mad scientist character

[@DeepakGautamX]

5:10 What I think. When we pour water from the container like jug. Water wants to come flows out in cylindrical shape. But when it leaves the container it becomes thin like a flat paper. Cylinder changes to flatten cylinder. And due to outward coming force this flat surface roates. And it keeps on rotating. You can confirm this by taking a long strip of clothe hold it from one side and turn it from other side. Like do several twist. The exact same shape will form.

[@uplink-on-yt]

Doc, what happens when I die? We give the bed to another patient.

[@AmphiptereSiX]

Steve-"I can't do any chores around the house without noticing physics oddities"-Mould

[@NickHermans]

"the Mould piss stream effect".

[@thorvaldspear]

lmao yes

[@jamesramplin8124]

The Mould Effect 2: Revenge of the piss

[@drderpphd]

Mouldy Pee

[@nasos007]

The mould effect - seconded. We did it for Parker squares...

[@madil2259]

The piss effect

[@azariaasle]

I'm glad these videos exist because this is the type of thing I think about at 3 am but it's just slightly too weird to be considered a socially acceptable conversation

[@vidalion]

Other Science KZbinrs: here's a 3d animation explaining it Steve Mould: I've rendered it in a copper pipe this is the ingenuity we stay for

[@mitchh3092]

Oh but when I just film myself peeing and go "SEE THIS WEIRD SHAPE THE PEE MAKES" I'm "violating decency standards" and "a creep"

[@luiss428]

@@mitchh3092 i hate this LMAO

[@manojlds]

Well, he has a thing for pipes. Sad that he didn't paint it red.

[@JS-rv3et]

id use a chain link

[@mataeuxah]

here is the most important question : when your pee splashes, is the splash made of pee or water? what determines the composition of the splash?

[@violahero4life]

Acid to water, and not water to acid

[@halflucan]

The splash is made of pee. I brought a blacklight bulb for Halloween and out of curiosity, took it to the bathroom... the bathroom bowl was near a right angle of wall and it was speckled to hell 1. I didn’t realise pee fluoresced 2. How are you meant to clean drywall

[@guiagaston7273]

@@halflucan that's why real man sit down to piss.

[@halflucan]

@Sam Towers I’m assuming the black light was fluorescing the dry compounds in the piss and the water evaporated The faster something hits water, the more it behaves like a solid. To me, is like pee is bouncing off it like a rubber ball

[@namedrop721]

@@halflucan never take your black light to a hotel if you ever want to travel ever again

[@Prateekch95]

Steve : To properly describe this shape, let's produce a really good example of it. Me: Oh God! I hope he doesn't start peeing.

[@blinded6502]

69 likes, nice

[@suppersdinner119]

I hope he does

[@pairot01]

@The Pursuit You can't not expect that comment

[@leftysheppey]

@The Pursuit steve mould is a DILF, and I'm sorry you cant accept that

[@Eduardo29564]

I had this question since high school! Never got it answered, even with 5 years studying physics at university! After 8 years finally I got an answer! Thank you!

[@emmab.dalton8456]

I want you to know that I watched this and subsequently spent a large portion of my son's bathtime explaining the concept to my husband using bath toys. Fun for the whole family!

[@hewhobringsthenight9907]

i bet you are really really fun at parties. no sarcasm. i would love to hang out with u lmao

[@ExperimentIV]

“go and have a look now” he says IMMEDIATELY after i’ve finished peeing smdh

[@kupillas-1638]

I’m gonna sound like an idiot saying this but what does “smdh” mean?

[@ExperimentIV]

@@kupillas-1638 "shaking my damn head" don't be afraid to ask, even though there's so many jerks out there who'll be mean to you for not knowing something.

[@kupillas-1638]

@@ExperimentIV aw thanks!

[@incription]

I’ve always tried to pee harder to increase the wavelength of my pee stream. Now I know the physics, thanks Steve!

[@jakkakasunset5485]

*pisses harder* *_PHYSICS_*

[@incription]

@@jakkakasunset5485 MORE POWER

[@Gereon_]

@@incription MAXIMUM POWER!

[@tomwang5564]

@@Gereon_ Elon Musk has entered the chat!

[@tomwang5564]

@@incription Elon Musk has entered the chat!

[@B-2-Z]

In order to see the flow patterns going on inside the buckled stream (as I would describe it) it would've been nice if you had added particles like glitter or something like that in combination with Slow motion filming to see what's actually going on there. I myself always thought that the shape was a spiral... Gotta love physics!

[@ButzPunk]

When your doctor spends his free time binging pictures of Matt Parker, you know you've got yourself a winner.

[@leftysheppey]

Or a psychopath

[@SupaDanteX]

What if it wasnt his free time? Maybe Matt has issues too D:

[@nawarelsabaa]

@@SupaDanteX Does Matt have Parker-square-shaped urine?

[@renatoimperatori5289]

you mean a weiner 😂

[@kjv35]

This shape should be called an "oscylinder"

[@marfrde]

I thought it was a Mould Cube

[@macronencer]

Yes, "oscylinder". Good!

[@peachmelba1000]

It's a helix.

[@macronencer]

@@peachmelba1000 Not really. It has two longitudinal planes of symmetry: it doesn't "spiral around itself". I think "oscylinder" is a fun word because it would be a cylinder (tapered, anyway) if it were not for the oscillations.

[@peachmelba1000]

@@macronencer True. I just peed. Took notes haha

[@CrossingRover]

What about when it splits up into 2 streams and makes a huge mess?

[@gameonyolo1]

L

[@NothingHereButMe]

F

[@georgecampbell9190]

L

[@snoot6629]

if you pee less hard the two streams would eventually meet in the middle and will combine into a single stream of piss

[@the_original_Bilb_Ono]

Lol idk if you are genuinely asking or just trying to be funny.. but, thats because there is semen in your urethra. Thats why it happens after sex or wetdream.

[@blmisfit8208]

This man is answering the real questions

[@paulwright8695]

I have been wondering about this for literally DECADES. I've tried searching for it on the internet and only ever seen it described as "twisting", which it clearly can't be. Thank you for giving a plausible explanation Steve!

[@flurgy22]

You said laminar flow, Destin from smarter every day is gonna show up any second now.

[@locasailor]

I am glad you made this comment..

[@amarug]

I really had to laugh out loud when Rohin picked up that phone with the disconnected cord during "pretend working" ... he is such a comedic genius and his channel is suuuper interesting, personally by far my favourite medical YTer. I really like his views and approach to everything.

[@redgentleman2412]

I had came up with that very same explanation a while ago on the toilet, but now having it confirmed by Steve Mould I'm quite proud of myself

[@thechumpsbeendumped.7797]

10:56 Doctor pretending to type picks up a phone that’s not connected to base. I love these silly jokes.

[@Norsilca]

pretending to type into google image search results for matt parker

[@nobodynowhere8061]

What jokes? He was in his office doing paperwork for his patients and the phone was wireless

[@thechumpsbeendumped.7797]

@@nobodynowhere8061 🤣

[@MalcolmCooks]

so this is The Shape of Water everyone's been talking about...

[@theclipreaper]

That's a 3 years old reference, but well memed regardless!

[@ikarienator]

It should be called "pee diamonds".

[@ewantheboat]

What about pee chain ?

[@Qmeister044]

Like shock diamonds? I can get behind this. :p

[@qnicks23434]

@@ewantheboat 'pee chain' sounds like 'печенье', means cookie in Russian

[@summertilling]

My cat had that. We had to feed him special food.

[@camicus-3249]

Kidney stones if you have a powerful stream

[@brunosappl9717]

finally a youtuber that doesnt judge the way people pee !

[@michaelmoccio2225]

"The platonic ideal of a stream of pi-" oh come on man, he had me going there.

[@CMAraujo87]

I could call this a “chain” format.

[@jakovbrizic]

I call it the "chain of relief" :D

[@esatd34]

Blockchain! , peeChain!

[@singaporesammy]

I think of it as a wobblix. It almost looks like a helix, but it's just wobbly.

[@xeropunt5749]

Physics is one subject where l listen, & feel I’ve had a stroke. Each word/concept taking eons to comprehend.

[@yakaridubois3378]

It feels good to be challenged ;)

[@xeropunt5749]

@@yakaridubois3378 yes, shark tank style

[@anacreon212]

This man answering the important questions

[@SteveFrenchWoodNStuff]

I've wondered and puzzled over this for years now (seriously). I always saw my own stream as a twisted ribbon (as in your last example). But I think it's actually more like the primary example in this video. And as soon as you pointed out that it's not "twisted", I immediately knew the answer (that it's just an oscillation of surface tension trying to reduce the slit/flat stream to a rounded cross section.).

[@TraceguyRune]

**cough** nerd **cough**

[@xed_i2070]

You're now my new favorite KZbinr!😍

[@brandonb417]

This sounds like the beginnings of a doctoral thesis for a mechanical engineer.

[@matthewbartsh9167]

That bit about getting your affairs in order had me laughing out loud. More of that sort of thing please.

[@vanreece]

I believe the rinse aid is a weak surfactant, which looks like it lowers the surface tension enough that forming droplets spontaneously is less likely, but it still has enough to do this effect. Nice sweet spot! Great video.

[@brocktechnology]

This is why the mythbusters couldn't get "peeing on the third rail" to work. I've been yelling at the screen for years now.

[@fewwiggle]

They just needed to drink sufficient dishwater rinse agent stuff

[@beyond6storm]

not necessarily: A pee stream is not driven by gravity alone, but also by bladder pressure. Therefore the stream will not thin and break apart because of non-uniform speed across the length of the stream. If you manage to keep the break-up forces smaller than the surface tension of the stream cross-sectional area (much easier to do in laminar flow), then you should be able to prevent the stream from breaking into droplets. Another reason the MB experiment COULD have failed would've been the "morning after" pee stream: with your stream production tool being all swollen and stiff, the equivalent diameter of the orifice is reduced enough to make the jet strong enough to make the break-apart forces stronger than the surface tension. This can manifest as a split v-shaped stream or as one that starts off as a sheet and which breaks apart further down the stream.

[@beyond6storm]

in other words you have 2 options: - as MB said themselves in the episode: you can do it if you are hung like a horse or - if you pee like a water-jet cutter

[@r0cketplumber]

“There are three kinds of men. The ones that learn by readin’. The few who learn by observation. The rest of them have to pee on the electric fence for themselves.” ― Will Rogers

[@tmcche7881]

@@r0cketplumber lol ... did Will Rogers really say that?

[@andrepaim7007]

This is brilliant! I always wondered about that, but assumed it was something to do with the "liquid" coming out at different angles on each part of the cross section. And have you wondered about what is the movement a particle would inside this flow? Would it kind of rotate along or would it take some other type of movement? Thanks Steve Mould, your channel is brilliant!

[@thezeias91]

10:56 love that british sense of humor. It's a bit like monty phyton

[@GapWim]

2:00 _”you need laminar flow”_ **Destin has entered the chat** 2:06 _”This is not about laminar flow”_ **Destin has left the chat**

[@joewell6435]

Medlife crisis when he finds out Steve's going to die: "oh no! Anyway"

[@mel14sky]

Smarter everyday day: poop splash Steve mold: pee shape

[@MonkeyJedi99]

This channel has really gone in the toilet.

[@T3sl4]

Cody's Lab: mercury tho?

[@jeaneliel]

I can totally see this becoming a source of inspiration for all forms of art ( if it's not already).

[@nineball039]

My empathy to the women squatting over their toilets trying to hold a mirror without getting any on the floor.

[@enclave2k1]

@Dan Nguyen _furiously scratches notes on a pad_ *YES, AND?*

[@TheMonkey747]

Maybe they'll realise aiming can be tricky and quit accusing us of intentionally pissing everywhere. They might even get a pronged stream with 2 or 3 different streams that'd mess with their heads a bit.

[@TheMonkey747]

@Dan Nguyen "I don't like sitting to pee." *Hands complaining woman a smashed garden hose* "Here watch the stream, and don't get it everywhere." *Turns on water, resulting in a flat misshapen stream.* "How effective was your 'not aiming'? Aww, you still got it everywhere."

[@_tripalong]

@@TheMonkey747 or, just sit tf down

[@Olodus]

"The Platonic ideal of a stream of pi--" almost made me spit my food laughing. Haha you are amazing Steve

[@jamesrockybullin5250]

Just FYI, it's "platonic", as in Plato, the Greek mathematician.

[@swivvy3037]

Now can you explain why at 3:26am it always seems to have a mind of its own and just go 60° left or right

[@ntsure2436]

Residual bodily lubricants, either your own or your partner's, that have dried, changing the shape of the orifice.

[@jttnc]

I’ve had it go a full 90 before

[@MarcoHoefman]

I would say that the name of the shape should be 'chain' because it mimics the shackles of a metal chain hanging down.

[@MarcosSanchess]

The disconnected RJ-11 cable at the end totally makes to the channel a like.

[@mikosoft]

haha, good eye, I didn't notice it

[@_rlb]

I love that you're always making fun of Matt in a cheeky non-explicit way :)

[@stonex3077]

true OGs remember when he forgot the s in looks, and it became the ultimate meme title

[@paulfitzgerald4933]

Great video. Can you do one little trick with the rinse aid study? Maybe use a syringe and inject to one side food coloring or a few sand particles. Simply out, if it's oscillating the color should stay on the same two sides with little crossing of paths. If it's actually spinning the fluid with color / dye / particles should be criss crossing from one to the next and then the next in the same direction on the way down. Not that I don't believe it's oscillating, but I do think it would be astounding to see one side of it limited to the same two sides as further proof. It could also be done with dividers in the container and coloring only in one that's near the edge of one. Let me know your thoughts on my lunacy, My good man, if you would please!

[@ShiftK]

"why your pee looks like a chain" 200k people: hmm.. Interesting

[@dominator_47]

500k imao

[@adarshthecuriousone1392]

Yes

[@BlackSmokeDMax]

Nailed it!

[@Bless-the-Name]

"We'll euphemistically leave it there," is the phrase for 2021

[@DavidEve]

I have ALWAYS WONDERED THIS! And BTW, I have always thought of it as a helix-like shape. Seeing from all the way around I would say it looks like a chain without the space in the middle.

[@BUSSINJUSTIN10M]

This is a very good scientific question. I’m glad we focused on this instead of other real world issues😂

[@noahgranger6749]

0:46 The nicest way I've ever been told to piss off

[@biochemicalracketeering3018]

Right when said "I should talk to doctor" I knew what was going to happen

[@sebbes333]

Prediction: "Because the liquid has surface tension"

[@RobertSzasz]

And momentum

[@jackmclane1826]

And mass and inertia... ;)

[@wallabra]

And volume and low compressibility!

[@odw32]

@@wallabra And low viscosity and a low enough melting point!

[@glamorouslynothere4785]

Bro is asking the real questions out here

[@nasonguy]

BRB trying to make helical urine. Edit: I totally typed this as a joke, then got curious and actually tried it. Guys, I have good news, you can make your urine helical. I'm not even kidding. Anatomical detail incoming so if you're shy or whatever don't read on. Pull your foreskin all the way back before you start peeing, GENTLY place your thumb and forefinger on the head (glans, whatever), start peeing, then very gently turn the head about 1/8 to 1/4 turn. You don't want to pinch and twist so hard that it deforms the shape of the urethra opening, but just enough to give it the slightest of "S" shapes. We're talking microns here (hehehe). It totally worked for me and I'm more excited about this than I should be. Go give it a try.

[@vladstr100]

Not what I expected to read here but nice to know 😂

[@nasonguy]

@@vladstr100 Go try it. It's fun. If you have different hardware, try to figure it out and report back, haha.

[@gregorymalchuk272]

Don't forget to pull your foreskin back or you'll have a flow diffuser instead of a nozzle.

[@WilliumBobCole]

And what if the two "ends" of the flow split into separate streams, what might that mean for one's health? Asking for a friend

[@AurumFaber]

Their whats-it is about to split in two.

[@natelav534]

Means u gotta dirtee pp.

[@enclave2k1]

What about triple helical streams? Asking for friend of a friend. Side question: is freestyle peeing a sanctioned sport?

[@sk8rdman]

1:05 This is your golden opportunity, Steve! We should start calling the shape pee makes when it leaves your body the Mould effect. Finally, an effect named after you that can be demonstrated by pouring something from a container.

[@SEThatered]

This man has endless curiosity. Never change.