A 2D Heron's Fountain Behaves Weirdly

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Steve Mould

Steve Mould

Күн бұрын

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Heron's Fountain is a mind bending hydrodynamic mechanism. It appears to be perpetual motion but it fact it's a really clever mix of pneumatics and hydraulics. This 2D presentation helps to explain how it works.
Image credits:
Soxhlet extractor image - Vivi! (commons.wikimedia.org/wiki/Fi...)
Washout toilet - Flammingo (commons.wikimedia.org/wiki/Fi...)
Toilet diagrams - SouthHamsian (en.wikipedia.org/wiki/File:Fo...)
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Пікірлер: 4 800
@SteveMould 3 жыл бұрын
The object itself is 3D of course, but there's nothing interesting happening in one of those dimensions! What I'm saying is, there's a legitimate sense in which the mechanism is 2D. Don't @ me. The sponsor is CuriosityStream: Get a whole year for just $12 by going to curiositystream.com/stevemould and using the promo code stevemould at checkout.
@flurgerbla7609 3 жыл бұрын
but would it work with oil and water?
@biggjiggins8987 3 жыл бұрын
8:24 "gas is less dense than air” that almost slipped passed me. Shouldn't it be gas is less dense than liquid
@larryscott3982 3 жыл бұрын
@@biggjiggins8987 Yup. Wawa be heavier
@rednammoc 3 жыл бұрын
@@biggjiggins8987 unless the air is chilled somewhat heavily until it's no longer a gas, perhaps?
@chrishill601 3 жыл бұрын
Not something that would work in 2d, but I have noticed lately that lightly stirring (in a repeated pattern,) the water in a pot that's just starting to boil is a neat way of 'seeing' the currents. If you time it where bubbles are forming on the bottom, but not rising yet, because the water above them is still cool enough to act as a condenser, then when you stir, the faster moving currents will carry the heat away from the part of the pot under them faster than the slower moving ones, so you get lines of bubbles where the water is more still, and the heat can build up more. I don't know if there's enough there for a video, but I definitely thought of you when I noticed it.
@kaisalmon1646 3 жыл бұрын
You heard it here first folks: "Gas is less dense than air" 8:24 (edit: corrected time)
@keco185 3 жыл бұрын
Clearly he said “gas is less dense than hair” /s
@guiorgy 3 жыл бұрын
Also noticed that lol
@phonn6935 3 жыл бұрын
@@keco185 /sarcasm?
@mathiasplans 3 жыл бұрын
But steel is heavier than feathers!
@Sean-pm2vd 3 жыл бұрын
@@mathiasplans A tonne of feathers is the same weight as a tonne of steel.
@NickMick9 3 жыл бұрын
"The turd on the shelf", precisely the kind of insightful and intellectually stimulating content we come here for. Keep up the good work!
@MrAndrewBeattie 3 жыл бұрын
The turd on the shelf is so that you can EXAMINE your poo. Typically to look for worms.
@keithfulkerson 3 жыл бұрын
@@MrAndrewBeattie ahh, that makes sense. "Turd on the shelf" cracked me up, though.
3 жыл бұрын
We call it "Wurstbalkon" here. (sausage balcony)
@Siska0Robert 3 жыл бұрын
That toilet was pretty common in Czechia, but I'm glad to say that they're phasing them out.
@Shrek_Has_Covid19 3 жыл бұрын
i call it the shit on a shelf
@Keeps25 2 жыл бұрын
I feel like this would've been very cool to see with two different density fluids. Say water and mercury. We would be able to see a fountain effect without any air.
@skyfeelan Жыл бұрын
it's all fun and games until you got mercury poisoning
@joshc5613 11 ай бұрын
a mercury fountain sounds more like something Qin Shi Huang would have come up with
@andistansbury4366 8 ай бұрын
Fountain of youth.
@bluesbest1 7 ай бұрын
@@andistansbury4366 Because you'll never grow old?
@dgurevich1 6 ай бұрын
​@@skyfeelanjust use cooking oil instead
@paulgrosse7631 2 жыл бұрын
I remember seeing (and using) the German toilets when I went on tour there with a band in 1984. The sound engineer's theory was that it reduces the incidence of piles because people spend less time on the toilet (find somewhere else to read the paper) and the vocalist's theory was that it was so that you could look at what you had produced and have a greater chance of finding any indicators of bowel cancer (or other disease) there - they eat a lot of meat there. I also recall the same feeling of horror that you did when you see the fill-up-then-empty type. So, what to take away from this comment? If you want to see the toilets of the world, join a band and tour ;-)
@sweetgirl070707 2 жыл бұрын
Which band?
@the-quintessenz Жыл бұрын
From experience with the splash and shelf system, I can tell that you need to use the toilet brush less often. Especially if you put a sheet of toilet paper on the shelf before you start your business, there is rarely anything left at the end.
@toast6375 Жыл бұрын
@@sweetgirl070707 *_THE BAND_*
@metrillbeats Жыл бұрын
The Vocalist was right, Thats why some Hospitals still have some of those
@Channeldyhb Жыл бұрын
The absolute worst part is when it does actually keep rising when it's clogged 😨
@Fleonwyn 3 жыл бұрын
The "Turd on the shelf" is especially helpful in the medical sector. Its easier to control the stool for blood or something or to get stool samples. But why people (like my parents) decide to install it in their homes is a mystery to me.
@rasalas91 2 жыл бұрын
Those are basically normal in germany - I'd say that more than 50% of private toilets are like that. You can see a lot of health problems by "inspecting" your poop (more like a casual look while flushing) daily. The pee color is more visible too.
@Fleonwyn 2 жыл бұрын
@@rasalas91 I am German and 50% of the toilets in our house are built this way :)
@Neysiriss 2 жыл бұрын
The reason people would get the turd on the shelf at their home, is mostly because people are scared of "splash back". I know a lot of people in europe who wouldn't use a toilet if it's not a "turd on the shelf" one
@yesihavereadit 2 жыл бұрын
We first saw that toilet in Austria. We were on holiday skiing, 6 blokes and one poor girl. First breakfast someone mentioned the toilets, then someone said what if you Do a long one, cue 6 boys slowly rising from their seats, the poor girl!
@Neysiriss 2 жыл бұрын
@@yesihavereadit can confirm though a long one can get complicated
@smokey04200420 3 жыл бұрын
7:46 Let’s all appreciate how he was able to get half air half liquid in the left column of that tube. Edit: I’ve added a timestamp.
@lol-pk6jj 3 жыл бұрын
That's actually very easy, just try to fill it all the way and you will get this
@aissaouimohammedakram8640 3 жыл бұрын
@@lol-pk6jj how?
@lowbudgetname2745 3 жыл бұрын
@@aissaouimohammedakram8640 git gud scrub
@bubbahottep8644 3 жыл бұрын
Spitballing: partially fill the tube, tape or hold the ends together, rotate until your air column is where you want it, pinch closed or put fingers over the ends, and rotate it to demonstration starting position.
@asileginger8223 3 жыл бұрын
Mhm.... there is a easier way hahahaha just think that the tube is a straw... have u ever played with a straw as a kid? well, as a kid, i would suck some juice, then pull the straw out of the juice to suck in air... and then put the straw back to the juice... so there would be air in between juice 😂 i guess u can do the same thing with that tube hahahaha
@maartenstriepe6893 Жыл бұрын
Definitely wasn’t expecting a 2 minute lecture on different kind of toilet bowls 🤣
@hariman7727 Жыл бұрын
It was a shitty opening in multiple ways.
@wafikiri_ Жыл бұрын
I have built many Heron's fountains, for my children and for my students, using bottles. But I always much separated (a quarter or half a metre) the two bottom bottles, used long pipes with long visible lengths outside them, and topped the top end of the uppermost pipe with a strainer. Results: • The fountain had a surprisingly tall jet, reaching very high over the pile. • Water circulation through the pipes was very visible, at least if some air bubbles were present. Once the top pile is empty of water, just putting the artefact upside down empties the bottom bottle into the upper one, and the fountain is ready to work again once returned to its normal attitude.
@goodguyjohn4625 3 жыл бұрын
8:24 "Because gas is denser than air" I mean, you're technically right, sometimes...
@viddork 3 жыл бұрын
Saved me saying it!
@orchdork775 3 жыл бұрын
Yes, that confused me! Maybe he meant that air/gas is less dense than water? Idk haha
@ShinichiroKururugi 3 жыл бұрын
Yes, I think he meant to say the air is less dense than the water.
@evildoctorporkchop6187 3 жыл бұрын
Glad someone else caught it 🤣
@AkanoWire 3 жыл бұрын
and thats the best type of right q:
@helnami2281 3 жыл бұрын
I love that you even made a 1 dimensional demonstration for completions sake
@andrewcraig1074 3 жыл бұрын
Where's the 4 dimensional version?
@thetafritz9868 3 жыл бұрын
@@andrewcraig1074 too hard to explain
@rpyrat 3 жыл бұрын
A true completionist would've made the 0 dimensional version as well...
@p1nkfreud 3 жыл бұрын
It's a 2 dimensional version, you cannot make a 1D Heron's cup
@helnami2281 3 жыл бұрын
@@p1nkfreud i was referring to the tube demonstration
@FileCode1459 2 жыл бұрын
this is so interesting!!! the 2d model really helped me understand what was going on, i really appreciate your effort into making this, i can't imagine how much thought it goes behind it. thank you for this video!!
@cerebrummaximus3762 Жыл бұрын
1:36 We had that one in our apartment in Bulgaria, but sadly our cousin broke something in the mechanism, and we had to replace the whole thing with a "normal" (UK or US, idk) toilet bowl. Fills me with nostalgia when I see this old design. Never thought I'd cry over a toilet bowl...
@wrongrabbit 3 жыл бұрын
These visualisations and explanations are just fantastic. Keep them coming.
@Skechi 3 жыл бұрын
He made me visualise a turd on the shelf perfectly.
@wraitholme 3 жыл бұрын
@GROHAM official No. Once the blob of air in the system is moved enough, the system reaches equilibrium and the movement stops.
@ross__mcl 3 жыл бұрын
I remember seeing one of those crazy toilets with a platform when i was travelling around europe 10 years ago. I called it the poop deck
@SteveMould 3 жыл бұрын
Oh that's good
@ross__mcl 3 жыл бұрын
@@SteveMould I amuse myself sometimes
@orbsphere- 3 жыл бұрын
If WTF is a poop deck wouldn't the others be stool pool?
@JanStrojil 3 жыл бұрын
They used to be really common in Europe some 40 years ago.
@rewardhole 3 жыл бұрын
A perfect platform for post-mortem examination. 'One poop ex_cav_ation a day keeps the doctor away'. Enjoy.
@haggleboggle 2 жыл бұрын
You know, I actually really appreciate the brief toilet primer. It's always nice to know how one's things work.
@Qiqibean 4 ай бұрын
"gas is less dense than air"
@nex 3 жыл бұрын
8:13 Steve Mould, professional U-tuber.
@arcm8725 3 жыл бұрын
@Knewman7777 3 жыл бұрын
Underrated comment!
@dr.redacted4492 3 жыл бұрын
I don't understand
@Knewman7777 3 жыл бұрын
@@dr.redacted4492 from 7:40 to 8:20 he uses a U-shaped tube to simplify the demonstration.
@dr.redacted4492 3 жыл бұрын
@@Knewman7777 ohhhhh
@jimjohnson5739 3 жыл бұрын
In Germany, a young lady told me the poo-on-a-shelf toilet became common 'way back in the day because of parasites; people had to frequently check their stool to know if they were worm-free.
@cinnamonkittamon Жыл бұрын
I wonder if this could be done with some sort of vegetable oil in place of the air, since it's about density
@WJS774 Жыл бұрын
Maybe, though the density of oil is _way_ closer to water than air is. Oil is what, about 80% the density of water, while air is about 0.1%?
@Cstolworthy 2 жыл бұрын
Great video! Personally I would love to see a visualization of a waterhammer pressure wave. We often see the effects of them, but I don't believe I have ever seen someone visualize it well
@thekornwulf 2 жыл бұрын
Grady over at Practical Engineering has a really good video on water hammer with visual aids
@jackdalton2538 3 жыл бұрын
I really like the way you transformed yourself into a polistiren cube for the demonstrations with the tubes
@unvergebeneid 3 жыл бұрын
Haha, when I read this, I did not pronounce "polistiren" like "polystyrene" but like "po-LISS-terrin". Took me a while ;)
@stephanjuvik6266 3 жыл бұрын
Are you talking about the white cardboard screen?
@luipaardprint 3 жыл бұрын
I imagine filling that tube with an almost perfect 1/2 water, 1/4 air, 1/4 water took more time and effort than building the 2d heron fountain.
@AdmiralStormy Жыл бұрын
I would hope he had something to pinch it, otherwise it would have taken significant levels of witchcraft
@veganjoy Жыл бұрын
you could just fill it with some water from your mouth, not that complicated lol
@TheWizardOfSand Жыл бұрын
@@veganjoy water? You mean orange soda?
@Weebdotexe Жыл бұрын
submerge 3/4 of one side, then submerge 1/4 of the other, pushing 1/4 out, so u get a 2:1:1
@mangouschase Жыл бұрын
@@WeebdotexeI'm getting jetpack fuel club penguin mission flashbacks
@_..-.._..-.._ 8 ай бұрын
I can’t watch this in HD, the eyes are too steely blue and seeing into my soul.
@stevievaughan5096 Жыл бұрын
this is my first video of yours and the bell siphon is definitely how my bong works
@totallynuts7595 3 жыл бұрын
Ah, fluids. That subject which makes you remember air and void are two different beasts. (Because when you study rigid body mechanics and the likes, you consider everything to happen in a void)
@TheDeadOfNight37 2 жыл бұрын
When air and friction are not negligible 😔
@wojtekpolska1013 2 жыл бұрын
@@TheDeadOfNight37 actually it has nothing to do with friction, its the air pressure and surface tension
@TheDeadOfNight37 2 жыл бұрын
@@wojtekpolska1013 I know I was just making a joke bc most of the time in physics they're usually both negligible or neither are
@nicreven 2 жыл бұрын
you mean a vacuum?
@maarten271 3 жыл бұрын
I live in the Netherlands, and I never knew there were other toilets than these “turd shelve” types. Then I took a look at my own toilet and noticed it doesn’t even have a turd shelve. Conclusion: I never really paid much attention to toiletbowl layouts.
@marcel9568 Жыл бұрын
You don’t give a shit about the layout. You should have noticed the wet ass.
@tinnguyenanimations522 11 ай бұрын
@keysmiff7689 6 ай бұрын
These were a bit of shock when we moved to the Netherlands in the mid 1980s. 😮
@noca7529 Жыл бұрын
Buenisimo! me encanto tu fontana de Heron en 2D, se entiende perfecto su funcionamiento y es muy inspiradora para ver como poder mejorarla. Saludos.
@lemonsneeker Жыл бұрын
Uk usually aligns with Australia RE plumbing supplies, we have flushomatics if you want to go into some hydrodynamics seen in our toilets. They seemed cool to me, but it was part of my carrer, so that might have helped. Basically the valve breaks an air lock which alows a certain amount of water to pass and flush the toilet, then the airlocked equilibrium comes back and the flow stops again, giving you a flush that doesnt need time to refill between uses, which is ideal for public toilets. The valves are also mostly recyclable, the seals will need changing every so many years, but basically its a similar system to gas bottles, you trade an old leaking one for a refurbished valve, they refurbish yours and trade it on to someone else, you dont pay for a whole new valve, and the majority of it lasts decades before actually becoming waste.
@BoggleWogglez 3 жыл бұрын
1:50 We would call it a "prestatiepot" at home, Dutch for "pot to show your achievement"
@psammiad 3 жыл бұрын
It's just insane. Who in their right mind wants to admire and smell their own shit. Totally fucked up!
@Bebop_2962 3 жыл бұрын
@@psammiad The design allows you to check for colon problems/parasites.
@cambridgemart2075 3 жыл бұрын
@@Bebop_2962 Indeed, they're common in Austria, particularly in the Alpine regions, where pork makes up a significant proportion of the diet and the incidence of parasites is higher than other places.
@TheGroundedCoffee 3 жыл бұрын
Also there's no risk of splashback, A.K.A. Poseidon's Kiss. They're truly great.
@RedHair651 3 жыл бұрын
@@psammiad you don’t look at your poo?
@ralexcraft990 3 жыл бұрын
“Gas is less dense than air” That had me laughing
@Psilocybism 3 жыл бұрын
As someone famous would probably say: Gas doesn't have to be air, air is gas though. Unless your building a rocket or a quantum computer.
@flinch6707 2 жыл бұрын
Ah it happens lol
@ralexcraft990 2 жыл бұрын
@@graham741 Specific gases might be lighter or heavier than air, but for regular non super complex operations air=gas is good enough.
@TheChzoronzon 2 жыл бұрын
@@ralexcraft990 and the quantum computer?
@ralexcraft990 2 жыл бұрын
@@TheChzoronzon IDK, I’m not a computer scientist
@douglasberger3908 2 жыл бұрын
Have you ever done a video on the continuous cycle absorption system for refrigeration? It is used in a lot of RV refrigerators. A little pilot light can drive a beautiful combination of fluid dynamics and thermodynamics in one system.
@Flamingtaint Жыл бұрын
I like this idea. I'd love to know how a small flame makes my fridge cold.
@SusanoRipper Жыл бұрын
Man, this channel and Your knowledge, accent, pure passion...its is all magnificent. Makes me look at the world in not-so-simple way but at the same time, a real way of how it works. Much obliged, sir.
@muh1h1 3 жыл бұрын
"The turd on the shelf". i've only ever known it as "Kacketeller", which would roghly translate to "poop plate" :D
@DJCornelis 3 жыл бұрын
The Pu Pu Platter! xD
@Psilocybism 3 жыл бұрын
This very same word in our language would mean someone/something that counts (like 1,2,3) turds.
@ubernate860 3 жыл бұрын
That earned him my like 🤣
@amandarios448 2 жыл бұрын
Kacketeller, sounds like poop counting/counter Which is about right
@emperor_rat 2 жыл бұрын
I alway thought that type of toilet is really good for hospitals... because there it is likely you have to monitor the looks of patients excrements 🤷‍♂️
@veritasium 3 жыл бұрын
Oh look it's Derek!
@mikehawk37 3 жыл бұрын
Cool to see you Here!
@oRitchinal 3 жыл бұрын
If anyone gets lost in this comment section, this is probably a good place to ask for derektions
@mikehawk37 3 жыл бұрын
@@oRitchinal pun patrol Here you're under arrest
@oRitchinal 3 жыл бұрын
@@mikehawk37 Guilty as charged, officer!
@mikehawk37 3 жыл бұрын
@@oRitchinal lol
@honeyham6788 2 жыл бұрын
the detail about tubes in the middle partitioning something in half reminded me of the brilliant novel "The Planiverse" about a world entirely 2D and how things would need to be constructed to allow such a thing to work
@lavoyebonham9086 3 жыл бұрын
I’d love to see a coffee percolator get the “2D” treatment.
@morcogbr 3 жыл бұрын
Oh god please don't use that devil mechanism to make coffee, just get yourself a Moka and enjoy
@lavoyebonham9086 3 жыл бұрын
@@morcogbr but it’s more convenient than a pour over. Although a Belgian siphon coffee maker would be fascinating to see as well.
@wailingwarlie 3 жыл бұрын
@beefymcskillet5601 3 жыл бұрын
Wait till you taste properly made coffee
@morcogbr 3 жыл бұрын
@@beefymcskillet5601 Hope that one day he does
@Xsidon 3 жыл бұрын
The shelf is there So you can appreciate your masterpice in full glory when you're done.
@edeworabraham2761 2 жыл бұрын
*chef kiss
@johnjordan3552 2 жыл бұрын
I usually take pictures of my works afterwards, so my friends can see my brilliant masterpieces and appreciate them as much as I do
@nlb137 2 жыл бұрын
If it's big enough to brag about, you'll be able to see it even in a normal toilet bowl.
@Xsidon 2 жыл бұрын
@@nlb137 True but it's not the ideal circumstance for review
@duncanbowtell2607 2 жыл бұрын
The goal is to fill it up till it kisses your cheeks…
@dizfoster8726 2 жыл бұрын
Design note- you may want to use less right angles on your drains, both for this and for the 2d Greedy Cup. Love your stuff.
@rossstewart9475 2 жыл бұрын
1:50 Washout toilets are used in the UK, too: That shelf is considerably easier to remove a stool sample from than most other designs, and (at least when I worked in the industry in the late 90s) they were common for hospital use, and also in 318 stainless steel; By order of HMPS. The greater distance through the trap also made it harder to use the u-bend to store stuff out of sight of staff, though there were other ways this was avoided.
@jamesgates1074 3 жыл бұрын
“Let’s make a U shaped tube” Maybe we should call it a KZfaq?
@babeez1513 3 жыл бұрын
Underrated comment
@snazzy1050 3 жыл бұрын
buh dum tss
@Stickman_Productions 3 жыл бұрын
UTube KZfaq Human shaped tube if you are human
@Thesupremeone34 3 жыл бұрын
we actually call them U-tubes in fluids EX: google U-tube manometer
@ANabih-uo3zy 3 жыл бұрын
Get out
@brent_peterson 3 жыл бұрын
8:25 “gas is less dense than air” I guess you learn something new everyday
@h7opolo 3 жыл бұрын
you can also learn something new everyday every day. ;)
@thetafritz9868 3 жыл бұрын
I noticed that too
@Kram1032 3 жыл бұрын
to be fair, certain gasses are less dense than the mixture of gasses in the air at sea level, whereas others are much denser
@xuko6792 3 жыл бұрын
In the context of talking about toilet bowls seems legit
@ZEGTHEFISH 3 жыл бұрын
A kilogram o Steel is heavier than a kilogram o feathers
@2259ninja 2 жыл бұрын
Wish i had found this video sometime in school so I could explain what you have in this video as a science project of some kind.
@TheCentaury 5 ай бұрын
Steve. The more I watch your videos, the more I think you want to achieve (or are obsessed with) perpetual motion :D
@dontaskquestions8721 3 жыл бұрын
I saw this as “Heroin Fountain” and I was like “How the hell is this still on KZfaq!?
@doxasnike4789 3 жыл бұрын
@verdetetto1814 3 жыл бұрын
Same WTF
@InservioLetum 3 жыл бұрын
Because the algorithm doesn't have a drug problem, lol....
@startube3629 3 жыл бұрын
I read it as "Heroine Fountain" and was expecting some ancient greek myth... I was disappointed but amused.
@tofikk 3 жыл бұрын
I see heroin I click
@winsomehax 3 жыл бұрын
I read "2D heroin fountain behaves weirdly"... I need to sort myself out.
@kaylakat9583 3 жыл бұрын
i was worried i was alone
@Casey-cy6ph 3 жыл бұрын
@user-jc7hs1wd1d 3 жыл бұрын
Same lmao
@Speed001 3 жыл бұрын
Yes, sort yourself out. Please don't string yourself out, lol.
@Sparrow420 3 жыл бұрын
you mean snort yourself out
@JONNIE8OY 2 жыл бұрын
When i was an apprentice Plumber (55 years ago in the UK), we used to fit syphonic WC pans, quite often. They were far superior to wash-down pans.
@homagee296 2 жыл бұрын
This man's videos are in top-notch quality and it's so much educational yet super enjoyable!
@odw32 3 жыл бұрын
"The type of wire that's in your walls" is dangerously similar to the whole toilet situation. I'm convinced that World War 3 will start when someone asks an American, British and German electrician to wire up a house together.
@siliciaveerah9327 3 жыл бұрын
Honestly...a video I kind of want to watch now
@DOSTalks 3 жыл бұрын
Yeah but the type of wire they use is irrelevant. The difference between the electrical systems on those countries is related to sockets, voltage and frequency etc. You could wire an american home with british wire no problem (maybe not the other way round because of the earth but you could just use a separate cable of the same wire for that)
@odw32 3 жыл бұрын
@@DOSTalks There's also very different requirements regarding water damage safety and location/routing of the wires - in many european countries you're not allowed to wire horizontally through walls, and all wires must be isolated strands pulled through PVC conduit tubing of a certain diameter, which must be glued into wiring boxes. Putting the "flat" UK cables, or loose 8 inch service loops as is common in the US in a Dutch house would immediately void your fire insurance.
@mortenhartvigkristiansen7760 3 жыл бұрын
@@DOSTalks I don't think that would work though.. Since US runs on lower voltage, I'd expect them to run higher current, so they would require thicker wires compared to those used in Europe. No?
@huuskari174 3 жыл бұрын
@@DOSTalks they're bit more complicated and there is differences in wires and wiring. For example in great britain they use ring circuits where other countries don't.
@sampersonguy5337 3 жыл бұрын
As I’m sure you can imagine, the rising of the water in toilets can be quite scary in the US as well if it doesn’t go back down
@YuBeace Жыл бұрын
The “shelved” toilet also helps for those who need to keep an eye on their health via their stool. Yes, really, certain health conditions can be tracked really well by checking the changes in how the stool looks.
@mmmdananananone Жыл бұрын
Really interesting and top-notch presentation.
@GioBardZero 3 жыл бұрын
I grew up with a "turd on a shelf" style toilet and when I moved to America, dealing with splashes was such a shock
@shasan2393 3 жыл бұрын
Poseidon's kiss
@Graxu132 3 жыл бұрын
I'm always putting a piece of toilet paper on the water to get rid of the splashes 🤣
@trinesrensen560 3 жыл бұрын
So the Netherlands? I don't think that style of toilets exist anywhere else.
@GioBardZero 3 жыл бұрын
@@trinesrensen560 nope, Georgia (the country). Funny thing is, I've never seen another toilet like it anywhere, even in other places in Georgia (the british style ones are the dominant ones there)
@harleyspeedthrust4013 3 жыл бұрын
What do u think of zandukeli lemonade
@KarnBlueEarring 3 жыл бұрын
I grew up with the WTF toilet. I'm from Germany and I always assumed it was normal as a kid. Until eventually I got into school and visited other kids and realized that our toilet was kind of unique...
@nova290r 3 жыл бұрын
Jo die nennen es oft auch german toilet.... sagt alles
@LinKueiDragon 3 жыл бұрын
Sure, false Furry
@KarnBlueEarring 3 жыл бұрын
@@LinKueiDragon wat
@abdullahyousef3481 3 жыл бұрын
@davidrobertson1980 2 ай бұрын
What you need here is a trompe, straws/tubes reaching almost the bottom of the left waterfall tube but sticking out ABOVE the water level above (in the model version that is,) otherwise you dig a shaft 300 feet long and just use short straws in a funnel shape with a stream above forcing the air BUBBLES downwards in the funnel then tube along with the higher pressure water, and a chamber after a right turn at the bottom, culminating in a chamber of COMPRESSED AIR and water going to another tube to almost the height of the stream but a little further along downhill. This compressed air can be used to drive air driven MACHINERY, fill tanks to run vehicles with steam engines running on just air pressure not steam, or run into a building to create a massive refrigerated room. Getting back to the model version here, the tube would NEED to be very low in the tank to allow the air to be forced by the water pressure above, to the right giving more AIR into the system to keep it going.... erm for how long who knows? ;) You'd definitely need more water here... Not sure the tube width changes or actual depth required down the waterfall area but I'm sure SOMEONE will give it a whirl :P
@eliblay9973 2 жыл бұрын
I never knew I wanted to know how a herons fountain worked, until 3am on this fine morning
@dtyle1890 3 жыл бұрын
It would be interesting to see with two liquids of different densities ie water and oil
@riatorg 3 жыл бұрын
This was my thought as well. Does the compressibility of the gas play into the effect?
@dontneedtoknow5836 3 жыл бұрын
@@riatorg only the the compression of water. The lesser of the two is restricted by the greater only to the point of the greater. Then it becomes mass over volume.
@triste4-21 3 жыл бұрын
@@dontneedtoknow5836 water cant compress. Well, liquid water cant compress
@BloodyHaemorrhoids83 3 жыл бұрын
Step 1: Cover yourself in oil
@dontneedtoknow5836 3 жыл бұрын
@@triste4-21 is there any liquid that can compress?
@hindering4278 3 жыл бұрын
I've moved to the Netherlands and the first time I encountered the poo on a shelf style toilet my first reaction was indeed: WTF... I have my own name for them though, I call them inspection shelf toilets.
@giorgosvr09 3 жыл бұрын
I believe "inspection shelf toilets" is a direct translation of the Dutch word used them or so I was told by a Dutch friend. Apparently in the old days it was very common for doctors to examine stool samples from sick people so the Dutch came up with this design to facilitate the sample collection process.
@hin_hale 3 жыл бұрын
I call it the trophy shelf toilet.
@botsjeh 3 жыл бұрын
@t0k4m4k7 3 жыл бұрын
He still missed it hahaha
@Vasharan 3 жыл бұрын
Those shelf toilets look like they would be very handy if you were smuggling diamonds or cocaine into a country.
@adbarretttth 2 жыл бұрын
My Dad, a plumber of 40 years' 2 laws of plumbing. 1. Shit always rolls downhill. 2. Water finds its own level.
@stopshowingmeongoogle1017 2 жыл бұрын
Others have probably commented but I couldn’t see any in the top batch: when making stainglass windows here in the U.S. my grandfather taught me to put a copper tape around the side edge of every piece of glass and then using the thick diameter solder not the thin stuff you use for electronics you can set the pieces adjacent and solder the edges together
@Roedygr 3 жыл бұрын
"gas is less dense than air" should be "air is less dense than water"
@rpyrat 3 жыл бұрын
You sure about that?
@NielvanderWath 3 жыл бұрын
@@rpyrat haha yeah tell Roedy Green
@yusufat1 3 жыл бұрын
Funny thing, "air" in indonesian language (pronounced a-eer) means "water". Thus as an Indonesian his statement is correct. 😅
@angeluscollins2382 3 жыл бұрын
i notice that to
@nathanegbert977 3 жыл бұрын
Intentional errors are used to boost comment counts. I assure you, the attention required to produce and edit this video did not miss such an obvious error.
@TechyBen 3 жыл бұрын
[Looks at toilet designs] OH!!! So *thats* why every other country in the world always gets "floaters" and I've never had a problem.
@ladderlappen4585 Жыл бұрын
this was actually quite trivial. thanks to you, i can feel smart now and my self esteem is raised.
@Channeldyhb Жыл бұрын
This is really my favorite series on KZfaq tbh
@qybl 3 жыл бұрын
the "turd on a shelf" toilet was invented by Germany. as a German, I think this is the second worst thing we have ever done.
@jcmick8430 3 жыл бұрын
I would say exterminate them all with fire, but they say 2 wrongs don't make a right...
@labradoor3884 3 жыл бұрын
If that’s the second worst then what’s the worst...
@paleoleft 3 жыл бұрын
@@labradoor3884 hmmm I wonder
@gohunt001-5 3 жыл бұрын
Third worst thing being whatever the heck the H&K G11's mechanism is
@kayq_ 3 жыл бұрын
@@labradoor3884 worst thing germans have ever done is the creation of gummy bears
@Gastell0 3 жыл бұрын
Despite never seeing or hearing this before, I immediately understood how it works the 2D version in the very beginning of the video, this is awesome work in making it so much easier to understand!
@obanjespirit2895 2 жыл бұрын
Those labels on that chart showing different types of toilet mechanism are very accurate. Especially the 'wtf' at the top right of the chart. Exactly what i was thinking.
@gondebas 2 жыл бұрын
7:46 That is marvelous part of your video. I managed to grasp how coil pump works. Thanks:-)
@adammercer9679 3 жыл бұрын
"Turd on the shelf" Or as I like to call it, a poo with a view.
@chriss31 3 жыл бұрын
Poo on the loo! Can’t believe he missed that....
@orbsphere- 3 жыл бұрын
OK can't resist a poo with a view or a poo with a phew
@Bezzer1975 3 жыл бұрын
"Elf on the shelf" has some opposition this Christmas.
@ForumCat 3 жыл бұрын
Crap on a lap?
@jasirkhan6513 3 жыл бұрын
Steve: *Makes an amazing video* Everyone: 8:25 gAs iS leSs deNse thAn aiR
@adfaklsdjf 3 жыл бұрын
this is the best comment about it xD
@sknt 3 жыл бұрын
Best way to get the right answer to a question is to post the wrong answer on the internet.
@dontneedtoknow5836 3 жыл бұрын
Depends. Air itself contains a concentration of many gases. H2S no. Something about sulfer that really doesn't like to stay in gas and seems to be pretty dence. Have to check the table on that one.
@Aquaponic0 2 жыл бұрын
I’m a high school science teacher in a high-needs area in Savannah,Ga. I am so glad I’ve found your videos because this is helping me learn how to break down complex interactions into visual demonstrations. I’ve got access to a 3d printer, which helps in many ways for more revolutionary/interesting designs and general manufacturing for class project, but I lack the fabrication process which I am learning from people like you! I appreciate your work so much Justin Kriske
@Gledii 2 жыл бұрын
This reminds me of a Gitton`s water clock in my hometown in a shopping mall. i used to admire it for hours. very cool
@hafizhmanaf1459 3 жыл бұрын
Everyone after watched the video : "wow, that's amazing. Now i understand physics" Me : "I want to drink that orange syrup"
@conmarsz 2 жыл бұрын
Not if I get to it first
@declantecho1717 2 жыл бұрын
It is water
@lucasanimations8636 2 жыл бұрын
@@declantecho1717 r/wooosh
@declantecho1717 2 жыл бұрын
@@lucasanimations8636 Hydrate or dydrate, buddy. I didn’t say _don’t_ drink it. Of course we all wanna drink the Highlighted Hydrodynamic Science Fluid (tm)!
@spankedbywife1018 Жыл бұрын
Thanks so much very well illustrated.
@ThZuao 3 жыл бұрын
You gave me an idea to use this principle for my cat's drinking fountain (cats love fresh, moving water). So I'll give you an idea for a video: Water locks with water saving basins. I'll refer you to look up how the Panama Channel water saving basins work. Water locks may be simple in principle, but Water is such an important resource for the Panama channel they invested billions into water saving basins that save up to 60% of the water used per crossing. Because if it rains too little or they use up too much water, the depth of the cannal may render it impassable for shipping. The way they work is that when a boat has to be lowered, instead of discharging the lock's water into the lower level of the waterway, it instead drains into a separate basin that is at a higher level than the lower channel. The water level at the lock and the basin will level off, at that point the valve between the lock and the basin is closed and the rest of the water has to drain into the lower level of the waterway. When a ship has to be raised, the water from the basin drains into the lock, then the basin valve is closed and the lock fills the rest of the way with water from the higher level. A one basin design can save roughly 20-25% of water (it depends on the area covered by the basin). Panama channel uses 3 basins per lock. each at one height. When one levels off, the valve closes and the next one gets filled and so on. It's a really simple and clever piece of engineering. And I've made one in Algodoo, so I can definitelly tell you it can be made as one of your models. Also, just for curiosity's sake, I calculated how much each cubic meter of water costs to be moved on the panama channel based on how much water is drained and the cost of traversing the whole thing. They charge $60 dollars per empty 20 foot container and $90 for each full container. The largest Panamax class ships can carry 15000 20 foot containers, so based on that, the height of the cannal and the size of the locks (there are six and they're all the same size), I calculated that each cubic meter of water in the panama channel costs between $0.16 and $0.25 if we don't take into acount the water saving or $0.40 to $0.60 if we do. Where I live, the cost per cubic meter of treated tap water is roughly $1.
@supersonictumbleweed 2 жыл бұрын
Grady from Practical Engineering has a great video on the locks
@edwardblair4096 2 жыл бұрын
Here is the link to the Practical Engineering video. He actually has several videos demonstrating hydrodynamic properties. kzfaq.info/get/bejne/iaimls-HyMvXdXk.html
@engihere5434 2 жыл бұрын
My friend has a cat Titan and he bought one of those fancy cat water fountain bowl things for him which cost like 50 bucks and Titan dumbass just goes to his new watering bowl and proceeds to destroy the whole damn thing within an hour lmao funniest shit
@ichliebebaeumeweilbaum 2 жыл бұрын
The "turd on the shelf" one is horrific to me. It's kinda common here in Germany, but whenever I encounter one, I question the owner's mental stability... No, I DON'T need see my s**t in its full glory, thank you xD
@heronscott6910 2 жыл бұрын
It's fun that I think of my name as a really uncommon name but I see that Heron is a really well known math formula and that video's subject
@jacko2131 3 жыл бұрын
I'll admit, as interesting as this was, I was expecting a lot more when I read the title as "Heroin fountain"
@erinhowett3630 Жыл бұрын
Me too...
@scandinerdian1961 Жыл бұрын
Indeed my thoughts exactly. I would think that Steve would've been quite the popular guy in the 80s of this was his legacy.
@mario387mario6 3 жыл бұрын
The shelf is the old style, had to do with being able to inspect the stool to spot illness.
@lumbiniashutoshtambat5871 Жыл бұрын
I wanted to know this since a decade and finally got the chance now in the best way!!
@987654321mnbv 2 жыл бұрын
Shelf toilets were popular all the way from Netherlands to the Pacific coast of the USSR. They can still be found all over this enormous stretch of land in old buildings.
@ryushi5 3 жыл бұрын
It would be interesting to see this done with two liquids of different density. Of course, it would be very tricky to fill.
@paulopereira47 2 жыл бұрын
It would stop when the liquid of lower density gets the role of pushing the liquid of higher density up
@YourCRTube 2 жыл бұрын
It will spoil it as it will reveal the mechanics. It will be easier to "connect the dots".
@janseta5162 2 жыл бұрын
@@YourCRTube not really, it cottons be WAY sneakier if the two fluids were the same color, so then you can't see any change over time other than liquid coming out the top
@skyrotechnics3245 2 жыл бұрын
I think it would be great to fill it up with lots of water, then use a syringe to fill the middle reservoir, then pour mercury on top, which would recreate the effect
@SamuelLiJ 3 жыл бұрын
"Gas is less dense then air" 8:24
@SteveMould 3 жыл бұрын
Oh damn
@user-bl4oq7fd8d 3 жыл бұрын
@@SteveMould didn't even notice it either, my brain somehow made total sense of that xD
@tassiehandyman3090 3 жыл бұрын
@@SteveMould Relax, man - it's just more evidence that you should never let the director edit his own stuff... 😂
@thetafritz9868 3 жыл бұрын
@xuko6792 3 жыл бұрын
helium gas is, so
@mitchellambro4347 2 жыл бұрын
Consider figuring out: 1. "Seth Rogan's gravity bong", "the no electricity pump made with a 5 gallon bucket and 2 pipes" and Also the tesla valve "which no one realized is displayed backwards" and is used as a nozzle fueling the tesla turbine. I appreciate your analysis style. Keep it up!
@nicholas3435 3 жыл бұрын
4:46 nice book you've got there
@SteveMould 3 жыл бұрын
Why thank you!
@theoct0525 3 жыл бұрын
8:20 "Gas is less dense than air" - Steve Mould, 2020
@michaeljacobdelossantos 3 жыл бұрын
Maybe he meant by moist air which is wet air is less dense than air of what we breathe which is dry air.
@theoct0525 3 жыл бұрын
@@michaeljacobdelossantos I think he meant that gas is less dense than liquid, considering the context, but just had a slip of the tongue ;)
@mohangurunathan8634 2 жыл бұрын
Brilliant explanation, bravo!
@BobbyParker784 Жыл бұрын
Well darn it I was looking for a way to make my own Perpetual Fountain watched about a million herons Fountain videos not a one of them said that it didn't keep running. You're the only one that mentioned that it would stop after a while
@bigl6322 2 жыл бұрын
I’ve just retired from building and repairing CT and MRI scanners for 40 years…worked with everything from liquid helium and a variety of thermodynamics to high Tesla magnetic fields, High freq 150kv generators and a variety of radioactive isotopes. Only had 2 years of formal education, but I have always had a fascination with how shit works. I only discovered Steve here about 2 hrs ago on a chain fountain video, that took me to tensegrity, then to heron fountain and I’ve been thoroughly entertained and educated..Totally enjoying your explanations, theories, and demonstrations… thanks!! your kids are lucky to have a father like you, my dad is the one who provoked and nurtured my curiosity…. I liked and subscribed!! (And am making my friends watch your videos cause they are clueless..lol)
@reezek3956 2 жыл бұрын
In dorms we call old "turd shelf" toilets simply "the stage" xD
@nayunis9289 2 жыл бұрын
This was very interesting! Thank you!
@danielson95000 2 жыл бұрын
The first thing I think after watching this is that I want to make a hydro gravity battery. You get a heavy jug of water and you turn it over, and water slowly flowing through this cycle across mechanical inhibitors generates a small amount of continuous power, until it stops and you have to turn the battery back over.
@wrongrabbit 3 жыл бұрын
With all the "gas is less dense than air" quotes in the comments, before someone else points it out, at 8:37 he meant "half column of liquid, half column of *air* on the right"
@guiorgy 3 жыл бұрын
Well, I missed that one as my mind was still on the first mistake :p
@Reth_Hard 3 жыл бұрын
I don't think so!
@tehklevster 2 жыл бұрын
When I used to visit Amsterdam for work and asked about the "poo shelf" in the toilet bowl I was told that it was because folks from the Netherlands like to eat lots of pig based products. Pig based products can be susceptible to worms, and so the shelf allows the poo-er to inspect their delivery for parasites.
@SpiderTNT. 2 жыл бұрын
i doubt people here actually use it to look for worms specifically, but i do think its quite normal to have just a quick look while flushing to make sure nothing suspicious is going on.
@therealteal620 2 жыл бұрын
@@SpiderTNT. or to admire your own work ( ͡° ͜ʖ ͡°)
@MissJilly0 2 жыл бұрын
@@SpiderTNT. if you're regularly getting worms from your pork, you probably don't have a toilet to poop in
@nara97 2 жыл бұрын
I didnt knew this o.O i thought it is for, not beeing too loud when it "plops" xD xD 💩💩
@XpVersusVista 2 жыл бұрын
@@nara97 what this person said is incorrect, please stop believing everything you read on the internet. It's in part due to the splash back, and in other parts that the general quick view, that you get, helps with noticing grave medical issues. You will quickly see if you have blood in your stool, which can indicate cancer. Yet it doesn't hurt, so if you never see your poo you won't notice the blood. Which is in part the reason that the death rate by colon cancer is lower in europe than in america. Simply because people notice issues sooner and get checked out sooner, thus having a better therapy outcome.
@marcellin1371 2 жыл бұрын
I really love watching this kind of videos during sleeping time
@aoyuki1409 11 ай бұрын
the heron fountain looks like a good example of a potential energy battery. you pour liquid at the top, essentially adding mass with high potential energy and it pushes the fluid in the middle into the bottom reservoir. so the amount of potential energy u can store is whatever the amount is in the middle reservoir and the depth is the distance between the middle and bottom reservoir. i dont know how this will work out if upscaled due to friction, surface tension, bubbling etc but it feels like you can fill the middle reservoir as to fill up the system with potential energy, start it with a small amount of potential energy by filling up the top reservoir, and harness the flow of liquid coming from the middle reservoir to the top reservoir
@xCorvus7x 3 жыл бұрын
1:37 That type is the best for the reason you mention. Every toilet should be built like that. And it's not like you don't have smell with the other designs.
@LickItTM 3 жыл бұрын
Just sitting on one and it is great
@dwaynemadsen964 2 жыл бұрын
I chuckled sensibly about "The Dribble!" Thank you for sharing, and stay safe.
@user-ju7dx8mu6d 6 ай бұрын
At 10:20 you see a bubble entrained in the pressurizing column and the mechanism still works as water flows around the bubble. The bubble must slow the water flow and this is neat example of how entrapped air can mess up flow, as in some siphon systems. Overall, a nice visual demonstration of an unintuitive phenomenon.
@stephenrhea5677 3 жыл бұрын
4:29 The bg music for that perfect peel 😆😂
@-danR 3 жыл бұрын
I want the outro music; dang I know it but can't remember the name or band.
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