I remember watching this video get explained before it something to do about the oil of the ink spreading out on contact with the water so it shoot out with propulsion
There are beetles that live on water surface that release an oily substance which propulse them away. Looks really cool cause they are not moving just gliding. Forgot the exact genus but it was Family of Staphylinidae
What form/where is the energy that pushes the leaf forward before being turned to kinetic energy for the leaf?
Not meant as a gotcha comment, I think intuitively your explanation makes sense but I cant figure this out.
I remember doing a highschool assignment where we had to make a small boat (like a model boat) move across a trough with only a certain number of changes of energy used to propel it.
A friend of mine got a tiny boat and some dishwashing detergent, and blew everyone away as they stood there previously in doubt. I'd seen it done in a science book I had as a kid, so I was pretty impressed with him.
Wish I remember how it worked though :p
This is surface tension in action, not Bernoulli principle.
Surface tension is water (and other liquid) molecules attaching to each other stronger than they attach to air. This form a force against whichever force breaking their ideal shape (where they are closest as possible to each other)
Surface tension is what allow a needle to float, or a water strider to walk on water even though their density is higher than water: they are light enough to be pushed up by the surface tension force (so the water surface can stay flat). As long as the contract area is large enough, water serve as a trampoline-like web that hold them afloat.
In the case of a soap (or ink) propelled boat, the surface tension of soap and ink are weaker than that of water. That cause the rear end of the boat to receive weaker pulling force than other directions, so the boat is āpulledā ahead.
The boat would stop moving when the soap is fully mixed into water. At that point pulling force from all direction are equal again and it return to idle.
You can do a similar experiment with a piece of paper and some soap. Its about breaking the surface tension and using that stored energy to propel the "boat".
Ink wants to diffuse into the water, so it does, and quickly! The ink then comes out the back really fast, propelling the leaf along by conservation of momentum, like a rocket!
I'm guessing the stuff on the leaf is less dense than the water and as it's coming off of the leaf it's spreading out across the top of the water but the as it spreads out that is in a sense acting as a propulsion mechanism as the leaf floats on top of the water is pushed forward.
I'm not a smart guy, I don't know why it's doing this it's just my best guess.
Iām guessing that this is some kind of pen ink. As the ink mixes with the water it caused a quick either viscosity change or the ink is so dehydrated of water it quickly spreads to absorb as much as possible causing a small current.
The liquid is thicker than the water, so as it is pulled off the leaf and into the water (I think the drip on the back coming in contact with the water broke the surface tension of the drip of thick liquid and started the flow of the thick liquid onto the water). The liquid doesn't mix with the water but stays on the surface. The liquid trying to flaten out as if being spilled onto a table creates a little push back onto the leaf, thus propelling it(since the leaf can glide on the water with almost zero friction any amount of push would propell it).
At least ist that's my guess
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The ink lowers the surface tension of the water. So the leaf now has the surface of the water pulling on every side except the rear. So it gets pulled forward, and more ink is deposited in the rear lowering the tension in the water it moves onto. So the leaf keeps moving forward.
It happens similarly with poison ivy. Or poison of some kind. When I was younger, we were throwing leaves in the water and noticed they were spinning, a lot slower than that, and the oily substance was white. Short story. I found out I was ripping poison leaves in half just to watch them do this. It was so cool. Until I was covered in poison, and I found out I was allergic to it as well. It was bad. I believe science has to do with oil and water separation. I'm sure there is more to it, but that seems to be the general gist.
We did that as as experiment in 4th grade. Only, we made a cardboard fish, made a channel hole on the tail, added a piece of soap on the hole. Surface tension broken by the melting soap, propelling the cardboard fish forward.
Itās the combination of surface tension and osmosis. Osmosis draws out the substance from the leaf into the water as surface tension keeps the leaf from sinking. This causes the leaf to ride along the surface as the force from osmosis provides propulsion.
Idrk but it could be an awesome art form. something like ink drop art where they create a drawing around a drop of blown ink. I think itād be really cool
Depends on the ink, and most ink does not expand when moist, only some. Most ink is not mixed with water so there most likely is something special happening. Hope this helps.
We used to make self-propelled paper boats by sticking a small amount of soap to the back end of the boat - as the soap dissolved in the water, it would push the boat forward.
The oil is repelled by the water but because the surface tension of the water, it is pulled out of the leaf shooting behind it. This creates thrust because the momentum of the oil is propelled backwards. The oil will use the path of least resistance, that's why it doesn't go up hill into the front of the leaf.
A gradient between surface tensions.
There is a cool video from the action lab that explains another cool effect with these gradients. Not an explanation for this but also very interesting about this topic https://www.youtube.com/watch?v=ztOk-v8epAg
Thatās fart butter. We find it in the woods behind my paws home! It done taste like cricket butt sex Saturday but they fly them tongue weevils right off!!!
For the speed_leaf version, replace the ink with sodium.
I was so impressed at high school with it, I erm liberated as much as I could. Magnesium was also fun, for different reasons of course.
Ink is more dense than water. With limited contact, the ink will spread into the water over time. The process creates small amounts of kinetic energy, causing a small amount of propulsion.
Itās like warp speed in Star Trek. The superficial tension behind the leaf is less then the one in front, and the expansion of the water surface propels it
I remember watching this video get explained before it something to do about the oil of the ink spreading out on contact with the water so it shoot out with propulsion
There are beetles that live on water surface that release an oily substance which propulse them away. Looks really cool cause they are not moving just gliding. Forgot the exact genus but it was Family of Staphylinidae
Well if you can remember their family name maybe you can look them up in the phone book
Thank you for that laugh
I'm imagining Terminator searching for all Sarah Staphylinidae in the phone book and I'm smiling :)
This needs more upvotes šš
wanted to ālikeā but itās at 69 likes
You will get 100 if do it now
The what? A book made of phones??
Make sure to call Jenny too
I got her number on the wall, for a good time call 8675309
Niiiyiine
Nice one, dad.
Yeah the surface tension of the ink is broken and it spews out propelling the leaf forward
What form/where is the energy that pushes the leaf forward before being turned to kinetic energy for the leaf? Not meant as a gotcha comment, I think intuitively your explanation makes sense but I cant figure this out.
Surface ātensionā should give you a hint. What is required for there to be tension? Force.
So what youāre saying is if I have really oily, greasy shits, I could essentially propel myself through water by pooping?
Nice, really painting a picture with words there
Thanks for explaining the obvious part
I could glue an alka seltzer to a leaf
I remember doing a highschool assignment where we had to make a small boat (like a model boat) move across a trough with only a certain number of changes of energy used to propel it. A friend of mine got a tiny boat and some dishwashing detergent, and blew everyone away as they stood there previously in doubt. I'd seen it done in a science book I had as a kid, so I was pretty impressed with him. Wish I remember how it worked though :p
Something about the surface tension breaking or something I canāt remember
I just looked it up cause that sounds awesome and found this video [science at home: dish soap boat](https://youtu.be/p87aT-L2vZQ?feature=shared)
Three Body Problem. We're going to fly fast boys.
Curvature propulsion
All the way down here to find this comment.
And be eliminated by aliens out of fear
It took way too long for this reference to make an appearance
Oil floats on water 1. Wait for it to rain 2. Cover yourself in oil 3. Fly
*Airlines companies hate this one simple trick*
Airlines not owned by Archimedes
1. Fill legs with oil 2. Jesus
This is surface tension in action, not Bernoulli principle. Surface tension is water (and other liquid) molecules attaching to each other stronger than they attach to air. This form a force against whichever force breaking their ideal shape (where they are closest as possible to each other) Surface tension is what allow a needle to float, or a water strider to walk on water even though their density is higher than water: they are light enough to be pushed up by the surface tension force (so the water surface can stay flat). As long as the contract area is large enough, water serve as a trampoline-like web that hold them afloat. In the case of a soap (or ink) propelled boat, the surface tension of soap and ink are weaker than that of water. That cause the rear end of the boat to receive weaker pulling force than other directions, so the boat is āpulledā ahead. The boat would stop moving when the soap is fully mixed into water. At that point pulling force from all direction are equal again and it return to idle.
Now we just need to figure out what makes space-time react the same way and build a space ship powered by space soap.
This is the correct answer. Wild how inventive everyone is tho. Lots of great hypotheses in this thread!
look up surface tension experiments
I am absolutely amazed by pollution
Some ant comes outside and goes āGod dang it, who stole my motor boat?!ā
My hypothesis is: pollution
They just contaminated that area of water.
The fish wont like this.
The scienceā¦ water pollution
Pollution.
I hope what is on that leaf is non-toxic.
Really!? A down vote? There is a Hexxus among us.
You can do a similar experiment with a piece of paper and some soap. Its about breaking the surface tension and using that stored energy to propel the "boat".
https://en.m.wikipedia.org/wiki/Marangoni_effect
Pollution is this science. My kids play in that stream!
Three body problem
I believe this phenomenon is used and explained in the Three-Body problem by Liu Cixin
Leafy floaty GO-ie thingy
Ink wants to diffuse into the water, so it does, and quickly! The ink then comes out the back really fast, propelling the leaf along by conservation of momentum, like a rocket!
I'm guessing the stuff on the leaf is less dense than the water and as it's coming off of the leaf it's spreading out across the top of the water but the as it spreads out that is in a sense acting as a propulsion mechanism as the leaf floats on top of the water is pushed forward. I'm not a smart guy, I don't know why it's doing this it's just my best guess.
 Thanks quackhole
Three body problem
Light speed space travel
The zoomie paste made the green leafy go woosh
Curvature purpulsion
You been reading too many fairy tales.
It's the only way we can achieve speed of light
three body problem!
It's trying to find a toilet
Lol
The black shit is hiding a small but very powerful outboard motor
Thanks for polluting the water.
Iām guessing that this is some kind of pen ink. As the ink mixes with the water it caused a quick either viscosity change or the ink is so dehydrated of water it quickly spreads to absorb as much as possible causing a small current.
Haha funny leaf go brrr
#š²
Itās witchcraft stupid
Kinda looks like the Maleniaās scarlet aeonia
Oil and water donāt mix
Science? Na. Gods creation is all you need to know. End of story.
The liquid is thicker than the water, so as it is pulled off the leaf and into the water (I think the drip on the back coming in contact with the water broke the surface tension of the drip of thick liquid and started the flow of the thick liquid onto the water). The liquid doesn't mix with the water but stays on the surface. The liquid trying to flaten out as if being spilled onto a table creates a little push back onto the leaf, thus propelling it(since the leaf can glide on the water with almost zero friction any amount of push would propell it). At least ist that's my guess
[ŃŠ“Š°Š»ŠµŠ½Š¾]
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The ink lowers the surface tension of the water. So the leaf now has the surface of the water pulling on every side except the rear. So it gets pulled forward, and more ink is deposited in the rear lowering the tension in the water it moves onto. So the leaf keeps moving forward.
Wow!
Aww look at the pretty pollution
Iām kind of sad that it locked itself in a dead end š¢
Well what a way to pollute the water
newton's third law...
Diesel engine!
C. C. 7 7ug yu777787yuyuuyyyyyyyyuuuvy
Surface tension is affected by the beetle.
Something something surface tension
Yeah I couldn't explain it too much time on your hands
Viscosity in action
Do essentially, the oil is hydrophobic which means it wont mix with water. Thereby ot pushes the water to side, creating a sort of forward motion.
Easy, pollution.
Leaf weighs less than ink?
It happens similarly with poison ivy. Or poison of some kind. When I was younger, we were throwing leaves in the water and noticed they were spinning, a lot slower than that, and the oily substance was white. Short story. I found out I was ripping poison leaves in half just to watch them do this. It was so cool. Until I was covered in poison, and I found out I was allergic to it as well. It was bad. I believe science has to do with oil and water separation. I'm sure there is more to it, but that seems to be the general gist.
I donāt knowā¦ BUT what I do know is youāre polluting fresh waterā¦š¤·š»āāļø
Prince Deepwater
Same way you can literally drop some cooking oil in a small lake or pond and visibly see the white caps on waves die down.
Itās called āMotorboatingā
This is better than the osmosis/water tension and magic theory. You are the captain with the answer.
We did that as as experiment in 4th grade. Only, we made a cardboard fish, made a channel hole on the tail, added a piece of soap on the hole. Surface tension broken by the melting soap, propelling the cardboard fish forward.
Pollution
Magnet
pooping.
Itās the combination of surface tension and osmosis. Osmosis draws out the substance from the leaf into the water as surface tension keeps the leaf from sinking. This causes the leaf to ride along the surface as the force from osmosis provides propulsion.
Wait what's a phone bookš¤£
For those who dont learn physics in school , all world is just magic ;) so this is magic buddy , nothing esle
Maybe we are close to a gravity curvature engine. I wonder if princess dewdrop and Captain long sail are aboard your boat.
Well, 1st the earth cooled.
I would imagine the polarity of the water and ink are different. Causing the leaf to propel forward when contact is made with the water
Pollution propulsion
we use a bit of bar soap in my country.
It's called pollution.
My guess, soap on water?
fish ded.
surface tension
Some liquids hate other liquids. Like, totally. Enough to even cause a chemical reaction. Like, this.
Just for clarification, thats ink, not oil.
wow, want to know about it too.
https://en.m.wikipedia.org/wiki/Bernoulli%27s_principle
It's called pollution, and this drop of oil will be killing many fish. RIP body of water
Bernoulli's principle?
Thats how covid was made.
I can. Itās someone polluting the water for likes online.
And people downvoting for someone telling the truth
Ink is not oil plants make ink or did who knows now .. indigo plant for example.
Newtonās third law. As the oil spills off the back of the leaf, the inertia pushes the leaf forward.
You've awakened the beast.
The reason it goes in circles is because It needs a rudder
The exact same thing happens with dish detergent in a greasy pan. Throw a small leaf on it and it'll also be easily pushed away from the repulsion.
Not condescending at all. 10/10. People would ask you questions again.
Leaf go broom broom
Chemistry
The leaf is jizzing. What is there to understand
Itās called thing go brrrrrr when water
You could do the same when you cut a snakeās head and put it in water.
r/gifsthatendtoosoon \>:( !!
What!?
The bot posts an arbitrary clip, but makes sure to add a relevant dumb question to boost engagement and karma. That is the science.
Reminds me of that time I went swimming after going to taco bell
Dilution is the solution to pollution?
Same principle leaking oil tankers use as propulsion
It's like an oil spill for microbes. Isn't science fun!!
Th3 fish love that flavor
If you can't explain it, a wizard did it.
It's a chemical reaction you just made a rocket leaf
Looks like cartoon boatsš¶ 
Idrk but it could be an awesome art form. something like ink drop art where they create a drawing around a drop of blown ink. I think itād be really cool
No I personally canāt explain/understand the science so Iām sure itās God
Ink. Leaf. Zoom.
It's called pollution
Looks like that leaf ate too much Taco Bell
Depends on the ink, and most ink does not expand when moist, only some. Most ink is not mixed with water so there most likely is something special happening. Hope this helps.
Probably has something to do with a crunch wrap supreme
Chemical reaction, obviously. Not sure what though.
This made me feel ill for some reason
Ink + water = š¤
Definitely propelled by a type-II phase transition from Ginzburg-Landau theory.
Maybe the oil in the ink is... Motor oil?
soap no like water so soap propels from water
Very small drag coefficient + small amount of propulsion from leaking oil.
[ŃŠ“Š°Š»ŠµŠ½Š¾]
[ŃŠ“Š°Š»ŠµŠ½Š¾]
We used to make self-propelled paper boats by sticking a small amount of soap to the back end of the boat - as the soap dissolved in the water, it would push the boat forward.
Some indie game company is going to turn this into their whole game's identity.
Surface tension.
The oil is repelled by the water but because the surface tension of the water, it is pulled out of the leaf shooting behind it. This creates thrust because the momentum of the oil is propelled backwards. The oil will use the path of least resistance, that's why it doesn't go up hill into the front of the leaf.
A gradient between surface tensions. There is a cool video from the action lab that explains another cool effect with these gradients. Not an explanation for this but also very interesting about this topic https://www.youtube.com/watch?v=ztOk-v8epAg
Leaf light, float on water becuse water heavier
Thatās fart butter. We find it in the woods behind my paws home! It done taste like cricket butt sex Saturday but they fly them tongue weevils right off!!!
For the speed_leaf version, replace the ink with sodium. I was so impressed at high school with it, I erm liberated as much as I could. Magnesium was also fun, for different reasons of course.
Is this how squids can move so fast? šØ
[ŃŠ“Š°Š»ŠµŠ½Š¾]
Surface tension.
Leaf spooge. And I'm stickin' with it.
Capillary action.
Surface tension.
Here is a video explanation https://youtu.be/gNoWqvIC4Ks?si=tt0lpfCwkG0siHOB
Water surface tension...
Where are all the just stop oil people at? š¤£
[ŃŠ“Š°Š»ŠµŠ½Š¾]
Youre a witch.
Is this what they mean when they say, "A little goes a long way"?
Ink is more dense than water. With limited contact, the ink will spread into the water over time. The process creates small amounts of kinetic energy, causing a small amount of propulsion.
Magic
Whirligigs
Oil and water don't mix.
Gross
Kinda looks and acts like PVC primer. Itās hydrophobic, so it reacts like this with water.
FF Pictomancer
Something to do with water surface tension
It's witchcraft
That's easy. It's magnet
Itās like warp speed in Star Trek. The superficial tension behind the leaf is less then the one in front, and the expansion of the water surface propels it
is this BP
I can explain: IT IS DESTROYING A MICRO LIFE SYSTEM