And there was a new update on 1300000000.2019.12.31 that improved virus ncov-19 so it wasn’t dormant. That was a bad update, but god thought it was a harmless creature that was dormant.
⚠️ SEIZURE WARNING!!! ⚠️ Quickly strobing lights from 4:12 to 4:35!! It's not exceedingly bright, but it messed with me enough to worry about anyone else who may suffer from epilepsy!
@@Nawmps yeah absolutely im just amazed because its something very common and i guess if thats is dangerus for some people we should be more conscious.
Note that the lower surface tension may cause the particles to sink unlike on water. But this would certainly be a cool experiment and with the correct "contaminants" we could see it work.
Easier, but not as mindblowing, as there's a chemistry going on there which we don't have any every-day intuition for. Conversely, water into water is an every-day thing which makes it interesting.
Either way, I wish he would _explain_ phenomena from first principles rather than just throw X-effect and high surface tension and low surface tension into the mix as though jargon were sufficient to the understanding. "The atomic bomb works on the fission effect where you have all these heavy atoms and a chain reaction and stray neutrons and..." ...would never have landed you a job at Los Alamos.
@@andricode I guess that since both yerbas are about the same in size and shape, the effect would happen too. Only difference is tereré yerba is less dried and stronger. It's hard to find tereré yerba in Buenos Aires. I would like to find chimarrão erva too.
As a former water treatment operator i can say that we have a hard rule that fixes that: The air gap must be at least twice the diameter of the receiving pipe or container So a safe gap for a measuring cup would be something like 13cm (five inches), depending on the size of your measuring cup
The construction industry also has a variation of this rule you mentioned. When running drains from a prep/wash sink the drain pipe empty's into the floor receptacle at a distance above the floor drain per the pipe size. Thereby eliminating the chance of bacteria and the like traveling back to the prep/wash sink. Crazy stuff. Cool video.
I recently accidentally experienced this effect while brewing pu-erh tea and was unsure of how there’s leaves inside the thermos, I suppose this may be the answer
@@zreolmeannin he's saying that had you found out a few years ago, you could have been the one to officially discover the effect. ngl that took me a while to understand lol also that's wrong because the effect is called "upstream contamination effect" and doesn't have the name of the student who discovered it. so the dude really failed hard here lol
@@Michelino_M5 that might be because the student himself didn't understand what's happening so told his professors before trying to understand the phenomena himself
How on Earth do you consistently come up with all this crazy, cool content? You must never stop thinking and wondering and finding things out for yourself to share for the whole world. Thanks for sharing your awesome brain with us and answering so many questions that we never even thought to ask. Like, you can boil water in a blender!? I'm still blown away by that one. Good show ol' chap. Bravo!
I don't remember when I subscribed to this channel, but every time my curiosity gets me to click on your videos, I end up having a deja vu of why I subscribed. I just don't want' to miss out on what you're sharing because it always pulls me back to my fascination for physics. When you spend most of your time looking at books, you eventually just go with the flow of studying what's there forget that you once actually had a fascination for this stuff. thanks for that
I first thought it was buoyancy too, but then I realised that if that was the case, the particles would already be in equilibrium at the surface, so they would be moving with the flow (which is an additional force), and thus away from the spout, rather than against the flow and into the spout. Correct me if I'm wrong.
It actually is completely known by anyone who has their senses. You can easily "smell" the flavors inside the clear remainder in a water bottle making it upstream from a syrup when you have poured the water onto it. That's not news.
@@RandoniumTJ what? yea, i thought that people wont understand what i was describing. It actually is technically upstream ... Please reread my words with that information.
@@CM-mo7mv oh ok . I see that. But I am not an English speaking guy . So i might not be able to exactly figure out the fact ... I think you are trying to say that , the smell of the syrup adheres to the walls or the remaining water in the water bottle , although it did not have any sort of downstream contact with the contents of the syrup ... I may be wrong still ...
Haha this is crazy i am from argentina and been following your channel for a year im very happy you talked about mate and even bought yerba lol. Love your content thanks for sharing.
You are the only person whose videos I like before even seeing because I know when it comes to science you are always correct man. Respect you a lot. Thanks for teaching us so much. 👍
I can explain this. With velocity it creates air around it going the opposite direction, if the object is light enough it will join the airflow instead.
im an exterminator and i was always taught about backflow prevention...but im a hands on guy and love to learn visually. you are soo intelligent and interesting, love your videos, and i love learning with the action lab!! thank you!!
No joking, I was always told that If I was outside in the woods and I had to go pee, not to pee on poison ivy Bc i could catch it from peeing on it.. I’ve never gotten poison ivy from doing it but now it looks like it could be true!!! Thanks for sharing! Great video!👍🏻👍🏻
Thank you for making videos like this! I just watched a video suspecting bigfoot of being able to teleport into peoples houses. Its nice to know that science can be as astounding as fantasy, and be equally (if not more), entertaining. Thank you again for making these types of video's. TH-cam desperately needs more of this type of content.
I came here to learn and I learned a lot I also got some anxiety and an eerie feeling that nothing is safe from contamination, even though if you pour from a high enough distance, it won't make it to the fresh/uncontaminated body of liquids
I've actually wondered if this was a thing for a while, but I didn't know how to word it to look it up. Good thing I went down this science rabbit hole.
🤔Great video Thank You for putting it out. I learned a lot today about how different tensions in fluids 🧐 can create upwards contamination if in close proximity
I am a long time subscriber and I am always amazed at your details and explanation of the experiments which are always so clear. Thank you. Does this affect have anything to do with Salmon going up stream?
I have often wondered if this could happen, now I know it's actually real! I had always thought it was probably impossible but the question has occurred to me numerous times when I have been pouring liquids. Great to see an answer to this!! Even more interesting to hear the explanation for why it happens due to surface tension difference as well. I love that you are always trying to explain the situation, not just demonstrate things in videos! Knowing why things work is just as fascinating as knowing how they work!
I think it is a combination of phenomena. By pouring the liquid, you thereby lower the surface tension of the surface of the liquid in the lower level. This results in 3 things. 1. Adhesion: Some particles will adhere to the one with higher surface tension while the others will sink. This is also possible because higher surface tension provide better ability to hold its shape allowing the contaminants to be "grabbed" by the imperfections of the downpour. 2. Pushing Motion: Some sinking contaminants are propelled upwards by the rebounding portion of the contaminated liquid when the contaminated liquid tries to reform its shape when it is deformed by the downpour. This may act as a 'pushing motion' propelling materials upward. 3. Pulling Motion: When the liquid being poured were to be stopped by tilting/retracting its container, the surface tension of the uncontaminated liquid that allows it to hold its shape may actually drag a portion of the downpour(along with some contaminants clinging on it) near its container. This may act as a 'pulling motion' to hold the shape. Combining these 3 effects may result to this 'Upstream contamination'. When some of the particles are grabbed by the downpour, these contaminants that 'adhered' are subjected to these 'pushing motion' and 'pulling motion' which, by laws of motion, are dependent on distance from its source explaining why it is more observable in shorter distances. Not to mention that if you also account gravity into the mix, gravity will be less pronounced it shorter distances and even lighter materials will produce a more visual experiment. Upstream contamination is dependent on distance, density, consistency, momentum, 'ionization' which may become integral in certain materials, some other unmentioned factors may also contribute but in less pronounce way. I'm not a science guy but this is how I see it. Pardon me if I failed to mention a more appropriate terminology in any consensus. I hope I get some feedback on this matter.
I did NOT expect to find a refference to my country much less to mate while drinking my own mate. I've seen that happen to my water but always thought the thermos was already "contaminated" with "polvo del mate" (fine dust of the yerba mate)
*So what if i pee into that contaminated water?* 😱
HOLY SHIT
You get a kitty 😼
Bacterias: helo
Uhhh
you piss at a high enough velocity (more of a jet than a pour) and far enough from the water that you won't encounter this phenomenon.
This effect is how they add individual molecules of flavoring to La Croix.
?
@@thibaut5345 Because La croix has no flavor
@@AshrZ La croix has many flavors
@@SoulDelSol many flavors, but no flavor. As in it lacks any taste.
@@SoulDelSol scents* the flavors have smell, but no taste. I bet the can is yummier.
Minecraft water physics is that you?
Yes
I wonder how can we make a tree hover in the air.
What if minecraft is only an early access to real life simulation
@BOT NOOB yeah, but I got my revenge tho. I grilled the dingo and ate it.
:o
THE LEAVES ARE PLAYERS
This is just a physics collision glitch.
It will be fixed in the 1.2021 update.
There is already a virus in this version (1.2020) I don't want to see anything else
@codey morganti nah man, the devs haven't been updating this kind of stuff
It’s the 130000000000.2021.1.1 update on 2021 January 1st.
God says he is working on stuff.
Wonder.
And there was a new update on 1300000000.2019.12.31 that improved virus ncov-19 so it wasn’t dormant.
That was a bad update, but god thought it was a harmless creature that was dormant.
@@gameingplayer1352
yeah they gotta fix that
⚠️ SEIZURE WARNING!!! ⚠️
Quickly strobing lights from 4:12 to 4:35!!
It's not exceedingly bright, but it messed with me enough to worry about anyone else who may suffer from epilepsy!
This effect is caused by the strobing light when recording slow motion with a cell phone, i did not know but its really enough to cause epilepsy?
@@sebaspi It was enough to cause me to feel strange while viewing, so I thought I'd play it safe and share this comment :)
@@Nawmps yeah absolutely im just amazed because its something very common and i guess if thats is dangerus for some people we should be more conscious.
thank you so much for the warning
You are officially a legend
The particles for some reason: *"My goals are beyond your understanding"*
@Lee Ruan it doesn't matter if it's h2o or any other *liquid* though
Absolutely amazing!could you put particles in alcohol and pour water?the marangoni effect should be enhanced.
what about soap water??
@@generalginger7804 yes. what about it!
Note that the lower surface tension may cause the particles to sink unlike on water. But this would certainly be a cool experiment and with the correct "contaminants" we could see it work.
Tell me y I saw macaroni effect 😂
Maybe with color or does it only effect flowing particles?
Wouldn't it be easier to demonstrate this with a beaker containing alcohol and food coloring and the cut-up can with the clean water?
That's a clever proposal, im gonna try this at home, thks
Easier, but not as mindblowing, as there's a chemistry going on there which we don't have any every-day intuition for. Conversely, water into water is an every-day thing which makes it interesting.
lgab True!
Either way, I wish he would _explain_ phenomena from first principles rather than just throw X-effect and high surface tension and low surface tension into the mix as though jargon were sufficient to the understanding.
"The atomic bomb works on the fission effect where you have all these heavy atoms and a chain reaction and stray neutrons and..."
...would never have landed you a job at Los Alamos.
1:10 Ok, I didn't expect to learn something from Argentina today, let alone finding a pack of yerba in The Action Lab!
Saludos desde Argentina!
Now I know how the yerba gets in the kettle!
What about "Tereré" from Paraguay?
@@andricode I guess that since both yerbas are about the same in size and shape, the effect would happen too. Only difference is tereré yerba is less dried and stronger. It's hard to find tereré yerba in Buenos Aires.
I would like to find chimarrão erva too.
No hablan los dos español?... Porque de responden en inglés jajajaj
@@vicentealvide1218 Para que la gente que lea los comentarios puedan entenderlos, ya que la mayoria que ve este canal son de habla inglés
As a former water treatment operator i can say that we have a hard rule that fixes that:
The air gap must be at least twice the diameter of the receiving pipe or container
So a safe gap for a measuring cup would be something like 13cm (five inches), depending on the size of your measuring cup
The construction industry also has a variation of this rule you mentioned. When running drains from a prep/wash sink the drain pipe empty's into the floor receptacle at a distance above the floor drain per the pipe size. Thereby eliminating the chance of bacteria and the like traveling back to the prep/wash sink. Crazy stuff. Cool video.
In Germany it's at least 3x the inside diameter of the pipe
I recently accidentally experienced this effect while brewing pu-erh tea and was unsure of how there’s leaves inside the thermos, I suppose this may be the answer
if you can brew the tea a few years before, it will called ( your name ) affect
Kaai Ting Jerry Kong didn’t understand
@@zreolmeannin he's saying that had you found out a few years ago, you could have been the one to officially discover the effect. ngl that took me a while to understand lol
also that's wrong because the effect is called "upstream contamination effect" and doesn't have the name of the student who discovered it. so the dude really failed hard here lol
M5 yeah got it after some time, that language though...
@@Michelino_M5 that might be because the student himself didn't understand what's happening so told his professors before trying to understand the phenomena himself
His neck is smiling with adam's apple being the nose.
LOL I just read this as I'm watching it and it's got dimples at 6:48.
good observation bro
Anyone see Majin Buu or just me
Tomo why must you hurt him in this way
Tomo omg yes
Looks like I need to be really careful what I pee into now
You especially should be worried because there is a parasite that swims up urine streams into the urethra.
@@sovietbot6708 well, maybe pee from one spot to other so they can't swim into it?
🤣
Make yourself have a shotgun stream
Yah, don't pee onto an electric fence.
Particles: *uno reverse card*
*Jumps on water*
A poop finds its way into the flush tank.
When i saw this in my childhood While playing with water
Mini-me:wut is dat?
@@blockcraftermc4612 😄
*In other words... Don't pee in rivers or lakes.*
Or anywhere
@Derpo *In other words, "don't pee in rivers or lakes." Are you happy?*
Oh wait..... we pee in toilets right? So the water or the toilet....... I ummmm aAAaAaA now I’m scared
This is correct
Dont river or lake in pees
* with your junk 1 cm above the surface
Just want to take a moment and THANK YOU, for giving me a better direction to think.
How on Earth do you consistently come up with all this crazy, cool content? You must never stop thinking and wondering and finding things out for yourself to share for the whole world. Thanks for sharing your awesome brain with us and answering so many questions that we never even thought to ask. Like, you can boil water in a blender!? I'm still blown away by that one. Good show ol' chap. Bravo!
I don't remember when I subscribed to this channel, but every time my curiosity gets me to click on your videos, I end up having a deja vu of why I subscribed. I just don't want' to miss out on what you're sharing because it always pulls me back to my fascination for physics. When you spend most of your time looking at books, you eventually just go with the flow of studying what's there forget that you once actually had a fascination for this stuff.
thanks for that
Hey man, love the videos, very educational! Keep it up.
...and all the questions people ask about your experiments. Experiments that I never even theorized yet are pushed so much further! So cool...
"Hey everyone, today I'm gonna be showing you why you should flush the toilet before you pee."
Moron!!
Flushing don't mean clean.
😖
A poo climbs up and enters the flush tank.
The Action Lab: Finally, we found another intelligent life on the Earth.
Hehe
I didn't see the effect name in the comments, so here ya go: Marangoni effect.
Came back to look for this. Thanks!
I always learn something really new from you, thank you for showing all these interesting cool things you learn!
Well done! Surface tension has many many facets that continue to amaze me after sixty years studying the subject
I would like to see the experiment with particles that do not float, it seems like it is just floating up, try with somthing that has neutral buoyancy
That's a very good idea ...
Don't think it will work. He mentioned it has something to do with surface tension, so it shouldn't. We should try, though.
Stupid. Go read somethin apart from mills an boone
The chalk particles aren't floating (they have higher density then the water), so you have already seen it.
I first thought it was buoyancy too, but then I realised that if that was the case, the particles would already be in equilibrium at the surface, so they would be moving with the flow (which is an additional force), and thus away from the spout, rather than against the flow and into the spout. Correct me if I'm wrong.
My god I love this channel. God bless you action lab. Genuinely bringing knowledge to the masses. Action lab > TKOR
The king of random
Very happy to watch a video explaining how happened something "impossible" I saw some time ago. Thanks!
That was seriously interesting thanks for making this!!!
I had this idea when i was a kid . And i thought it was a stupid idea . But now I'm happy that it was not totally wrong ...
It actually is completely known by anyone who has their senses.
You can easily "smell" the flavors inside the clear remainder in a water bottle making it upstream from a syrup when you have poured the water onto it.
That's not news.
@@CM-mo7mv that's right but not technically upstream ...
@@RandoniumTJ what? yea, i thought that people wont understand what i was describing.
It actually is technically upstream ... Please reread my words with that information.
@@CM-mo7mv oh ok . I see that. But I am not an English speaking guy . So i might not be able to exactly figure out the fact ...
I think you are trying to say that , the smell of the syrup adheres to the walls or the remaining water in the water bottle , although it did not have any sort of downstream contact with the contents of the syrup ...
I may be wrong still ...
Pro tip, just pour into the container from above your head so you get that 5 foot pour distance. Side effect; looks really cool
Each and every video you make is pure gold
Wow, that's unexpected! Thanks for the vid. Also, when they named that phenomenon, they nailed it.
This phenomenon was haunting me as a child now you revive it as a real thing
Could you try this with some dye to see whether the source gets contaminated just from the surface particle or even the solvable ones (like the dye?)
thank you for the research and all the time you invested sharing this fascinating thing!
Haha this is crazy i am from argentina and been following your channel for a year im very happy you talked about mate and even bought yerba lol. Love your content thanks for sharing.
You are so inspirational kepp going never give up you dreams
as a kid i always thought every bacteria or “germ” flew upstream so i would be scared to waterfall peoples drink
Wow, this is amazing and fascinating! Very well done. It's neat that a student discovered the upstream flow.
Thanks for this video man, learnt something today! Liked and Subscribed.
Who is that disliking this video which give us various information
*Me, an Argentinian:* Is that Yerba? No, no way that can be.
*Also me:* Oh, wait, it is!
Ya t's made it's way to North American stores and been popular enough to stick around
What brand is the Yerba Mate he is using?
Vamo Argentina pa
siempre pensé que tomar mate beneficiaría a la ciencia
Wow! I always learn something new on this channel.
Amazing!! It was so fun to learn this. I found some dust in my container but never thought about it. Maybe I could test it too! Thanks a lot!
I cant believe I made it here so quick
Clap Clap Clap Clap Clap Clap Clap
Imagine peeing on that leaves and ..... (yeah, you can imagine it)
oh no
man
Making tea in your bladder.
@@bernadettavarley yummy
@@walikazmi7613 delicious
This is very useful for people that work in labs and need to double check this does not happen in their day to day lifes
You are the only person whose videos I like before even seeing because I know when it comes to science you are always correct man. Respect you a lot.
Thanks for teaching us so much. 👍
Some s**** are coming every where to dislike a video..I found one
I can explain this.
With velocity it creates air around it going the opposite direction, if the object is light enough it will join the airflow instead.
Waiting on Destin to explain this in high speed detail lol
#SmarterEveryday
im an exterminator and i was always taught about backflow prevention...but im a hands on guy and love to learn visually. you are soo intelligent and interesting, love your videos, and i love learning with the action lab!! thank you!!
People who watched BFG: Hey I’ve seen this one.
Everyone else: What do you mean you’ve seen it, it’s brand new
That would seem right... in most cases.
Me: Counfusion
That's physics lol
Thanks for all the likes
Many people might have actually thought of this whole pouring something … but this actually proved that it actually happens… salute to you man
Awesome video man!! So informative
No joking, I was always told that If I was outside in the woods and I had to go pee, not to pee on poison ivy Bc i could catch it from peeing on it..
I’ve never gotten poison ivy from doing it but now it looks like it could be true!!! Thanks for sharing! Great video!👍🏻👍🏻
sujay simha well, that’s probably why I never did get it!! 🤣🤣thanks
"Nuh uh, not this boy's peentoo, not today."
- Dwayne "I don't like guns" Johnson
Lol couldn't help myself 😂
Thank you for making videos like this! I just watched a video suspecting bigfoot of being able to teleport into peoples houses. Its nice to know that science can be as astounding as fantasy, and be equally (if not more), entertaining. Thank you again for making these types of video's. TH-cam desperately needs more of this type of content.
Thanks for your work and research!
I'm not even surprised
2020 is weird
When ur so early that u just say E in the comment section:
Thousands of comments flashed up already
Oh man you blow my mind every time. WOW I had no idea. Thanks for teaching me something New
I love your videos so informative keep up the good work you’re awesome
I've thought of this many times when taking a piss xD
Always take piss into a clean toilet;)
Moron!!!
This man must be google cause there's no way a human can be that smart
Just love your vids. Thanks
Yay! First time being this early for an Action Lab video. Thanks James!
Come get your "Early Bird Ticket" here...
No
yes
Nooooooopeeeeeee
🙂
Can I have mine please
So this is why my poop always doesn’t seem to get flushed down completely
This channel never fail to amaze me
I came here to learn and I learned a lot
I also got some anxiety and an eerie feeling that nothing is safe from contamination, even though if you pour from a high enough distance, it won't make it to the fresh/uncontaminated body of liquids
Jesus loves u all so much
I had never heard of this phenomenon. It seems amazing!
I've actually wondered if this was a thing for a while, but I didn't know how to word it to look it up. Good thing I went down this science rabbit hole.
I learned something today. Thank you.
Wow action lab wow
Awsme videos , easy to understand , enjoyable
Therefore action lab is the KING of science videos!
Thankyou making videos 😊
Never heard of this phenomenon! thenks for letting me know it!
🤔Great video Thank You for putting it out. I learned a lot today about how different tensions in fluids 🧐 can create upwards contamination if in close proximity
Thank you! Another great one!
I am a long time subscriber and I am always amazed at your details and explanation of the experiments which are always so clear. Thank you. Does this affect have anything to do with Salmon going up stream?
Absolutely mind-blowing thing . Thank for giving such amezing knowledge.
Never heard of that. Great video.
Absolutely brilliant!!
Cool . Neat to see these effects in action .
Great video! Thanks! Very interesting how this works, should be known in the culinary industry. Where’s the alcohol/water experiment?
I know this as well but watch it because it's you. You are doing so great job.
I also noted that phenomena before but never looked so deep into it...❤️
I have often wondered if this could happen, now I know it's actually real! I had always thought it was probably impossible but the question has occurred to me numerous times when I have been pouring liquids. Great to see an answer to this!! Even more interesting to hear the explanation for why it happens due to surface tension difference as well. I love that you are always trying to explain the situation, not just demonstrate things in videos! Knowing why things work is just as fascinating as knowing how they work!
I noticed it before.. But didn't though about it.. Thanks for sharing this video.. You are awesome 👌👍
The particles seem to sometimes move in a circuit. They go in and back out. Interesting.
Checkout the velocities in this paper on reverse contamination arxiv.org/pdf/1105.2585.pdf
Mind officially blown!
Thanks.
Thanks for giving such a interesting explanation 👍👍👍👍
Ka ho jyoti
Wow, how i wish you were my professor in college physics! You explained our all so clear and so easy to digest and absorb
I think it is a combination of phenomena.
By pouring the liquid, you thereby lower the surface tension of the surface of the liquid in the lower level. This results in 3 things.
1. Adhesion: Some particles will adhere to the one with higher surface tension while the others will sink. This is also possible because higher surface tension provide better ability to hold its shape allowing the contaminants to be "grabbed" by the imperfections of the downpour.
2. Pushing Motion: Some sinking contaminants are propelled upwards by the rebounding portion of the contaminated liquid when the contaminated liquid tries to reform its shape when it is deformed by the downpour. This may act as a 'pushing motion' propelling materials upward.
3. Pulling Motion: When the liquid being poured were to be stopped by tilting/retracting its container, the surface tension of the uncontaminated liquid that allows it to hold its shape may actually drag a portion of the downpour(along with some contaminants clinging on it) near its container. This may act as a 'pulling motion' to hold the shape.
Combining these 3 effects may result to this 'Upstream contamination'.
When some of the particles are grabbed by the downpour, these contaminants that 'adhered' are subjected to these 'pushing motion' and 'pulling motion' which, by laws of motion, are dependent on distance from its source explaining why it is more observable in shorter distances. Not to mention that if you also account gravity into the mix, gravity will be less pronounced it shorter distances and even lighter materials will produce a more visual experiment. Upstream contamination is dependent on distance, density, consistency, momentum, 'ionization' which may become integral in certain materials, some other unmentioned factors may also contribute but in less pronounce way.
I'm not a science guy but this is how I see it. Pardon me if I failed to mention a more appropriate terminology in any consensus. I hope I get some feedback on this matter.
Great video !
Why do people always dislike these amazing videos 🤦
I did NOT expect to find a refference to my country much less to mate while drinking my own mate. I've seen that happen to my water but always thought the thermos was already "contaminated" with "polvo del mate" (fine dust of the yerba mate)
I think we all will redesign any pouring into contaminated waters to place the spout really high!! Thank you! Most interesting.
Heyo just wanted to say you are great keep it up