Why is Water So Stretchy?

[@TheActionLab]

I wonder how high the surface tension of a liquid needs to be in order for a human to walk on the liquid like a water bug does to water...I need to try walking on liquids next!

[@Gebakkenvrucht]

How does the viscosity of a liquid affect the surface tension measurements? Or does it not have any effect on it?

[@Gebakkenvrucht]

For example when measuring honey, if it sticks more to the surface and itself it lifts out more weight of the scale, so does that mean the surface tension is in line with the viscosity of a liquid?

[@terryowens3860]

Is there anything you can add to the water to increase it's surface tension?

[@Gebakkenvrucht]

@@terryowens3860 I think that sugars such as sucrose and glucose would increase the surface tension of water when dissolved.

[@YounesLayachi]

I saw people walking on non-newtonian fluid (ooblek, made of maize?) but it's a bit different from purely surface tension x)

[@Yana.-_-.]

Physics channel got a sponsor from a beauty product, what in the world

[@kimbleryan7150]

Yeah and the sponsor was three quarters of the video

[@atharvabhosale3529]

beauty product which uses physics so fair enough??

[@cptrikester2671]

Modern day snake oil?

[@leodawn5913]

Well, it reach the right audience because I totally want one!😂

[@leodawn5913]

@@kimbleryan7150 Kimberly there’s going to be a test later on the weight of water and it’s tensions. Will you be ready lol.😂 don’t get to irritated so that you can’t see the benefit of the video

[@Simon-fg8iz]

The comparison with the spring constant is misleading - both are force per unit of length, but the meaning of the length is different. In spring constant, it's force per DISTANCE OF STRETCH. In surface tension it's force per LENGTH OF EDGE. The distinction is important: a spring pulls more and more, the more you stretch it - it gets progressively stiffer. Surface tension pulls the same no matter how much you stretch it - the force isn't increasing but constant. But it does increase, if you increase the edge length.

[@TheActionLab]

Good point. Basically, the surface tension pulls the same no matter what because it keeps filling in the gaps with more molecules

[@pareshborase4414]

I also was thinking the same... Their units and dimensions are same but the phenomena is completely different.

[@2nd-place]

@@TheActionLabI mean, it’s not surprising that your science is falling to the wayside when you are shilling snake oil beauty products to your subscribers with no credibility behind it.

[@sans-befriended-your-mom]

@@2nd-place damn bro really did him like that your not wrong tho i was looking for a comment on it dudes become a sell out

[@MDG-mykys]

​@@2nd-placeIrrelevant to the comment

[@tHebUm18]

1. Neat content 2. That's the weirdest snake oil/late night informercial sponsor I've ever seen on YT

[@jimi02468]

"Let's check another liquid that has extremely high surface tension, ten imes stronger than water..." "I know this one, it's mercury" *pulls a liquid metal on the scale* "That's right, I knew it was mercury" "...gallium"

[@StefanReich]

FOOLED

[@RealmOfFiction]

i also thought mercury because it is the only liquid metal that i can remember.

[@zecuse]

​@@RealmOfFictionAt room temperature. Gallium is pretty close (~85F/~29C) and will melt in your hands if you aren't hypothermic. The coldest a human body has gotten to (accidentally) was ~56F/~13C.

[@YounesLayachi]

You can tell it's gallium because it's a sticky mess

[@vaakdemandante8772]

that's right, it's the square hole ;)

[@0neIntangible]

Next Action Lab video: "Why Is Water Wet?"... sponsored by the "Plant a Tree in Antarctica Foundation".

[@Zeno_Evil]

Please share the actual science behind the claims that BEAR device. (something published in a significant science journal)

[@maythesciencebewithyou]

he can't because it's bullshit. So disappointed in him that he became an advertiser for a scam product.

[@davidhorizon8401]

A little disappointed that your thumbnail was not in your video. I know everyone does it now but I didn't think you would. Still, a great video. I would also like an explanation of how you made the water form an A on the metal plate.

[@chaos.corner]

He put down some kind of A shaped stencil before spraying it with a hydrophobic spray (I imagine Scotchguard would do).

[@ethanlewis1453]

This is a truly epic explanation of surface tension... this will be a timeless classic! Thanks.

[@PhillipAmthor]

Im pretty sure this device you advertise either doesnt work or is rather harmful and i would love to see a scientific explanation with statistical values what it actually does

[@PigeonLaughter01]

I got micro current treatment during PT for a injury. It's common in physiotherapy. And how cells repair themselves has to do with voltage differences created by ion channels.

[@Lefaseer]

​@@PigeonLaughter01there's a lot of unproven methods used in PT and the professionals can be fooled and driven by perverse incentives too.

[@peterrollinson-lorimer]

I suggest you not buy the product then if you don't trust it. I won't be buying it either and I ff through the endorcement, but I'll still enjoy the videos.

[@skarfacegaming243]

I never in my life thought id hear water get called stretchy

[@gamernick1533]

Ooof, that ad insert. Lovely content but the ad has to feel like selling your soul. You know most of that is complete baloney!

[@hughgrection3052]

Let alone film yourself using the quackery

[@mobiyus3282]

Not sure about that voreo sponsorship. Or maybe you should test their product in some ways.

[@the_Hay_Family]

In fact, surface tension is similar to a spring force, but there is a big difference: the force of a spring increases when the spring is lengthened (Hooke's law), whereas the surface tension force remains constant when the lamina is enlarged.

[@coolnegative]

A "wrinkle reducer" is definitely NOT a perfect gift for a significant other 😅. Nothing says love like a gift that says "your face looks old and worn out."😂😂. Otherwise, great and interesting video.

[@Miki_xD]

Water with soap is not just water.

[@NOOBCRASTINATOR69]

Oh you poor average Joe

[@PascalxSome]

just watch it til the end..

[@CanadaBud23]

Alright, he's doing things I wanna do now.

[@nobodyelse-h6h]

Putting an electric device on your face?

[@MDG-mykys]

​@@nobodyelse-h6hobviously not what he meant

[@nobodyelse-h6h]

you know because you asked him? or are you just going beyond what he wrote?@@MDG-mykys

[@mike1024.]

I have to admit I found your initial demonstration surprising. I've never seen anything like that. I had no idea bubbles would pull if they were used two sided and one was popped.

[@adamoliver82]

This is his coolest vid for ages. love it.

[@MojackDaily]

Great video and examples, especially the slinky. Really creative and fun way to demonstrate the science behind it.

[@x9x9x9x9x9]

Water is weird since it's stretchy but doesn't compress.

[@schaventalakimungous4855]

How do you think hydraulic systems work? All liquids can be compressed, its just not an easy thing to do with some. Actually, fun fact, compressing things like gasses tends to make the gas colder, whereas water is heated when compressed to more dense state. It does also become easier to freeze under extreme pressures.

[@Blox117]

@@schaventalakimungous4855 who told you compressing gas makes it colder? the temperature doesnt change

[@jimbobf8017]

Can you do one on the surface tension of water as it applies to the high dive? For instance the force it transfers to the diver from different heights. And possibly how high would be a fatal impact.

[@Speeder84XL]

Those forces has nothing to do with surface tension - it's about inertia (yes, the surface tension is there, but it's completely neglectable in comparison). Water is heavy and have to be quickly pushed out of the way as someone dives into it. The higher up they jump from, the faster they will go when hitting the water and that means the water also has to be pushed out of the way quicker (=greater force) - same reason why it's hard to move other than very slowly in water (even the worlds fastest swimmers only moves a little faster than normal walking speed).

[@jimbobf8017]

@@Speeder84XL I find this very interesting. I wonder how he could measure that pressure? Maybe impact at different hights and with different size projectiles such as head size vs body size as in bellyflop style.

[@Speeder84XL]

@@jimbobf8017 Depends on what you want to measure. Usually the total force is most interesting, since that's mostly related to how it will feel and the potential for damage. That could be measured by for example put an accelerometer with some sort of logging on the diver or projectile - then multiply the deceleration force by the weight of the body/projectile, to get the force from the water. Water pressure can also be measured, but will be very different depending on where it's measured.

[@jimbobf8017]

@@Speeder84XL That would make a very interesting video (in my opinion of course). Thank you for the info 🤝 God Speed

[@DFPercush]

Ok now that was cool, the scale + adding soap demo. You can literally see the water losing its grip with just a microscopic amount. I've seen people use water displacement on a scale to measure the volume of things by the increase in weight, but I never thought about surface tension decreasing it.

[@carnsoaks1]

The space between rotations in the slinky also gets larger, changing the relationship between bubble and rail.

[@ConalRF]

Good idea putting the demonstration at the start.

[@brianmcrock]

Man this is so cool. You, my friend, are a great educator! Thanks.

[@KamilTheKhan]

Yikes sponsor

[@dasdawfda9913]

1:02 I think that a centrifugal force there does not exist. Actually what makes it fly away is the absence of a centripetal force that would "pull" the bubble in so that it describes a circular trajectory.

[@Lucius_Chiaraviglio]

Gallium has a significant confounding factor: The surface oxidizes spontaneously, and rapidly, so you're getting gallium oxide surface tension instead of just gallium. In the video, you can see that the surface of the gallium has a noticeable semi-solid film on it. I wonder what the results with the plate would have been if the gallium was kept in a carbon dioxide atmosphere (could be produced easily by sublimation of dry ice, and unlike nitrogen, it would stay down in a vat even when warmed up enough to keep the gallium from freezing).

[@NaturalStupidityy]

My man tried so hard to link his sponsor with science

[@diggoran]

Please explain the thumbnail. What is the arch between the two droplets?

[@haroldyoung2729]

One of your best and surprising videos! Thank you.

[@jondoef]

Thumbs down because of the dubious claims of the sponsor. The actual science content was cool.

[@alvesvaren]

Same

[@sophiedowney1077]

Stuff like that is so sketchy. Best case scenario it does nothing, worst case scenario it causes tissue damage. It's FDA "cleared," which is kind of sketch because the process for becoming FDA cleared is super broken. (John Oliver has a great video on it. It's his story on medical devices. Just to warn you it can get a bit graphic because they show what happens when someone has a flawed medical device implanted. It's a really good video though.) Also, as someone else said, a wrinkle remover is a terrible gift because it says, "you're wrinkly and you need to fix that."

[@PlagueDoctorscp049]

Thumbs down for ur comment

[@Lampe2020]

The popping of the smoke bubbles somewhat reminds me of the forgetting animation in Inside Out. Like, it disintegrates into a little puff of smoke which flies off.

[@kossi200]

lmfao the ad spot sounds like a scam with the "company that has shaken the wellness world"

[@Kazaki000]

I think the sponsorship doesn't know what is the demographic of this channel, I mean, it's a physics channel, not a beauty channel 🤨

[@maythesciencebewithyou]

Most people watching this channel are normal people who are just a bit curious and who will buy into whatever he says because they think he's a physics guy who knows what he is talking about. Among the 4+ million subs, just a few gullible people would already be worth it.

[@farvision]

Always interesting and well explained!

[@BadDadDodge]

so maybe the cleaner the water is the more sticky it is? we all know dirt makes sticky things less sticky, if you have super clean water is it more sticky or leas sticky? adding salt, is it only salt what does this or is it anything what is dissolved by water? good video as always

[@randomcharacter6501]

Idk man. Maybe just do a vpn sponsorship or something. As a science channel it's not really a good look to promote something that's unscientific... I'd rather an ad from Raid Shadow Legends than beauty nonsense. Edit: Science Lab does provide a link to a study done on the technology in the comments.

[@bravo.siguenza]

money is money. Times is hard my boi

[@ucitymetalhead]

That's what I thought too seems like a terrible product for a science youtuber.

[@gangsterism]

What about that product is unscientific

[@DukeEllision329]

This channel teaches us to think critically. if you actually bought this product, you don't deserve to be watching this channel.

[@ColCurtis]

I agree, have some integrity. I guess he does have a man bun he probably uses that face thing daily.

[@David_Mash]

What would be the effect to the surface tension of a single drop of water flatten between two glass slides

[@heyspookyboogie644]

2:10 “69 muscles in your face and neck” Heh heh 😏

[@bryand9689]

"Why is water stretchy?" soap bubbles

[@not_scaredyt2665]

this is what i wish i could do in the shower to feel like aquaman

[@meurtri9312]

i bet the bubble on slinky would be good model for photon emissions.

[@Killadey]

That sponsor segment was cringey af, not to mention scientifically dubious.

[@cosmicglitter]

Man I wish my science classes back in highschool were this cool

[@stevegelnett4469]

You make the coolest practical science videos.

[@Azelethros_OG]

That was really cool to learn! Thank you! Man science is cool and fun. I never would've thought of water as 'stretchy'. 😁

[@Ezis9]

How do you keep coming up with the most original physics demonstrations!?

[@TechSquidTV]

Let's try for some higher quality sponsorships

[@RegebroRepairs]

So the spring water that springs from a spring is springy? So we have springy spring water?

[@Superfandangoo]

Only been drinking it for 58yrs it never came to mind

[@bubby4576]

Nice video man

[@joho0]

The spirit of Mr. Wizard lives on inside you... except that you're considerably less grumpy than he was.

[@MammaOVlogs]

oh wow way cool, loved it

[@RedSoo749]

hey just so everyone knows, beauty products like these are scams no judgement action lab man you gotta pay the bills

[@maythesciencebewithyou]

Why not judge him? You should judge him, so should anybody else. Advertising scam products should not be looked over. The guy has over 4 million subs, you can't tell me he couldn't find another sponsor. He just sold himself to promote a snake oil company to gullible people. All those scammers and snake oil people also need to pay their bills, I guess you are cool with them as well. If he got money problems, then he should try to not overspend instead of promoting quack products.

[@dirtworm666]

Are tiny ponytails stretchy?

[@gagemonster555]

that's insane amazing work and interesting concepts as usual

[@samj4m]

Hey this video is really cool and it’s cool how you figure this stuff out!

[@calebhale9865]

In biology class we learned that if you're ever trapped in a jungle, you should cut vines higher up first, then lower down, to get water out. The top cut severs the water inside from the rest of the plant so it can't get pulled up, otherwise the water tension would pull the water up and you'd get a dry vine. Stay hydrated!

[@AB-ye7bw]

Fascinating demonstration!

[@michaellinner7772]

And by stretchy you mean cohesive right?

[@LSDverse]

I think I know the reasoning behind why the algorithm gave him the beauty sponsor! And that's becasue, of one simple reason..... He's a good looking guy!

[@bluestraveler2980]

anti-gravity

[@LoganKaval]

Imagine tomorrow you wake up and see a car that has water suspension.

[@John-zt8ju]

Ooooh... now I get why they call it "Spring Water".

[@0neIntangible]

Funny witty and clever! 👍

[@John-zt8ju]

Thank you, wasn't expecting such a kind response :)

[@jolomi_jolomi]

The sponsor is wild

[@capedbaldy123]

"thank you for the gift" *opens* "THESE NUTS!!"

[@sebg4662]

Bro the water ate the gomu gomu no mi

[@33rdGemini]

For water to truly be like a spring it needs to be able to be compressed, which it cannot be. I do agree that water has surface tension and can "pull" on things it's attached to, however this is not due to a spring force. For example at 4:30, you're not measuring a spring force, you're simply measuring the weight of the water being lifted by the object the water is attached to. Water itself cannot physically stretch. Surface tension does not equate to stretching. It would be like connecting 'Barrel of Monkeys' together and then saying they're stretchy. It just does not work that way. In the example at 0:20 and 0:55, the force of pull from the water is caused by surface tension and not because water is stretchy or springy. I feel calling it stretchy or springy is misleading, and although the intention is pure, this is how misinformation is spread and leads to an overall decline in generational intelligence.

[@chaos.corner]

There are plenty of springs that start out at maximum compression.

[@MustangsCanTurnToo]

Do not get your wife a gift that says “I want you to look younger.” 😅😅😅😅😅😄😅😅😅😅😅😅😅😅😅😅

[@pedrohenriquecarvalho5722]

When I saw the notification I thought the title was "why is water so sketchy", and I rapidly came here to see what that was all about. Still a great video though!

[@164procar4]

Action lab videos made in PJ are always the best

[@coolnegative]

Wouldn't temperature play a part in the surface tension? Especially with the Gallium's liquid to solid metamorphic property being far closer to "room temperature" thus the density increase over water?

[@onlyhuman3]

Does this happen with different gravity? Such as, will the proportion of surface tension be the same on the moon as it is here? Or does the pressure and temperature difference change it significantly more than gravity does? It would be an interesting thing to measure, and potentially create lakes of liquid which we can walk on, on mars or other planets/moons if able.

[@joemmya]

You did so amazing on this one omg. Omg I love this so much.... I think you should have given the cohesive and adhesive forces of water a little more credit in the video

[@Surrinkisum]

There are real scientists out there trying to teach trying to teach people real science and then there's you

[@bravo_01]

What is a negative mass? ❓

[@frederickingrando5469]

I'm a drywall finisher by trade and the real experienced guys would put dish soap & water when mixing the joint compound mind you I live in Massachusetts which the manufactures sell premixed compound for the region unlike alot of the rest of the country which gets powdered now I understand why those guys did/do that!

[@dogtaro6038]

everytime i look at ur face it reminds me of luka modric

[@MAliincontinencelife]

Wow that’s very interesting

[@typerightseesight]

darth maul was a character from the movie star wars. lol.

[@rohanpawar1603]

Your experiments are really great 👍

[@majormelon8855]

when you pop the drop, the fun dont stop

[@mollyanderson9111]

That segue into the sponsor was *chefs kiss*

[@iceman889]

How do you make the smoke bubbles?

[@iamwoman.hearmeroar.6146]

The most trustworthy beauty ad ever.

[@pgc6290]

Yo give that foreo to actors. Let them work totally normally and look totally normal even after 60s.

[@sudarshan1793]

surface tension

[@deadbeats4894]

Water is the dipole antenna of life/conciousness. The H2O molecule itself is the 108° 36° 36° triangle, the only incommenserable geometry in the universe. There's a bunch of cool experiments with water. Theoria Apophasis explains it perfectly.

[@ganymede3141]

Whenever he says 'Whoa! Huh-huh!' he sounds just like Butthead from Beavis and Butthead.

[@kerimedley8193]

Him: talks about how this is magically happening Me: hehe bubble pulled bubble

[@kenshi21]

Can we use that for produce renewable energy?

[@rushiketkute6605]

you should try a fan umbrella , a single proppeler or just using a rope or something else as a proppeler.

[@patrickday4206]

You should have done the apply electical voltage between to beakers

[@foobarbecue]

LOL@ the beauty face zapper sponsorship. Good job getting through that as if you meant it.

[@LC-yv9ey]

Can you freeze boiling water in a vacuum chamber?

[@teddp]

You remind me the quote of Don Licoln, the professor from Fermilab, "physics is everything"

[@durragas4671]

If this isn't sponsored then you're doing something wrong😂

[@gabor6259]

2:02 Note: FDA cleared is not the same as FDA approved.