Surface Tension and Adhesion | Fluids | Physics | Khan Academy

David explains the concepts of surface tension, cohesion, and adhesion.
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[@isabelaocampo5636]

" and your gonna be like oh thats so cool and youre gonna touch it, youre not supposed to touch it " looooolll i LOOOOVE IT

[@ally-xw2hj]

3:24 lol

[@bishakhashahrin3247]

best line of the video!

[@mustafarahi8670]

That what she said

[@FunTime-zi1hi]

And then you break the surface tension and the water starts dripping this dude is so amazing oml

[@bookkkworm]

that's so cool and fun

[@ally-xw2hj]

" it is not floating, it is sitting on top of it " It helped for my science project! Thank you so much!

[@ShivaPrasad-hm5lk]

What was the project

[@tttrendsYT]

This helped me understand surface tension so much more! It really helped my science fair project!

[@bbthebot227]

same lol

[@shaunakn5881]

The thing that khan academy has helped us in studies and will do in the coming years is just, awesome!
Khan academy rocks boy!

[@angiem7030]

I was trying to understand surface tension and this video really helped me a lot! Thank you!

[@Gaku-tw3bd]

Most of the teachers used to make complications in this topic but you made it clear

[@n1tr1x8]

u r a true teacher sir...khan academy an teach anything

[@sophiechuen5707]

U explain it so well, thank you!

[@yaleiqiu7687]

best explanation I ever find!

[@ArielStar]

This was amazingly and simply explained!!

[@checkm8852]

Omfg!!!!!!! Finally a video that I can understand about surface tension. Thankyou!

[@Mohitkumar-mv8mj]

Well explained , thank you so much , it really helped a lot

[@Vigi]

Great! Easy to grasp!

[@cuong8071]

You're really good at explaining. I had to learn this lesson at 3 4 times at home because my teacher make it even more complicated. But thanks to you, i understood the lesson. Thank you so much😍

[@science-y9209]

thanks a lot . I can't tell you how thankful I'm for such a, such a nice explanation

[@gathonimwangi6758]

SO COOL!!!! WHO KNEW I COULD FINALLY CRACK HOW SURFACE TENSION WORKS?! YOU ARE DEFINITELY MY HERO FOR TODAY :)

[@dishayanmandal]

This is really impressive
Thank you so much Sir

[@amileye6924]

I get it a lot better. Well explained .Thank you!

[@Photosynesthesia]

very accessible to people like me with minimal knowledge of this stuff, great explanation - thanks!

[@danielb.6184]

Very nice explanation, thank you very much!

[@kgkmurthy1961]

very very nice analysis and backed by day to day examples...good

[@danraul9759]

Man you made this so easy to understand...

[@nellyhoffman6194]

Im studying this for my LUNGS physiology khan academy is great

[@jeteloriaga]

this is the video where i got the answer to my question why the name is surface tension! thanks so much, i couldn't understand this concept from the book i was reading nor from the other videos i watched before this!

[@apurbabauri3878]

Thank you sir.....For explaining it very well.....I wish I could hit the like button thousand times....(Y)

[@chitranshbindal1874]

you should hit the like button 2 times😂🤣

[@chitranshbindal1874]

don't take it seriously the video was good

[@ShivaPrasad-hm5lk]

It might result in not liking for the 1000th time

[@winterblake3321]

@@ShivaPrasad-hm5lk odd numbers will result in liking. 1 time = like 2 times = not like. since 1000 isnt an odd number, it in fact will result in not likiing

[@vedantsingh8582]

You helped me in my exam. Thank you so much sir

[@apurvnikum3866]

short and sweet explanation.

[@abhishekashegoes5957]

Thank you sir...Thank you so much!!

[@akshattripathi5756]

the best thing is that they are giving free and quality education and not for any exams but for knowledge.

[@sisellllesis8872]

it makes sense now. thanks

[@chimerenwoji4458]

You really helped a lot. Thank you so much

[@shikhanshu]

What an awesome explanation!

[@ffveteran2309]

You really made it easy and time saving

[@guruofeverything6379]

Finally, somebody who explains it properly !!!!

[@Gaku-tw3bd]

Clearly explained well done sir.!!! Understood clearly 😀

[@Honey_Bun_34]

THANKS A LOT HELPED ME A BUNCH

[@omengdadong7703]

What principle in physics behind the surface tension?

[@vedbhobe9420]

too good to clear the concepts, khan academy is the best

[@corrupted9588]

i have been enlightened

[@peng8151]

great video and examples!

[@cikif]

Is there a relation between the polarity of a liquid and its surface tension?

[@muzamelpamir4336]

Very well explanation

[@moa9644]

Thanks a lot ❤️️

[@anushkarajora8084]

Loved it thanks sir

[@bizarrelance3698]

These videos are life savers.

[@hongkijeremy5236]

3:24 that line or explanation is so like Alexander Lightwood towards almost everyone... Except Magnus.. Lol, anyway, back to my general chemistry exam. 😵😵😵

[@user-hv6ef9ie1g]

Nice explanation!

[@aaranyachaturvedi6225]

Probably the best vdo on this topic

[@iYakuza11]

Well done, Sir. Amazing explanation 👏

[@yogeshkumarmatlapudi9603]

Excellent ly explained sir

[@olajumokealbert6578]

Thanks

[@bipasharouth4585]

Thanks sir

[@maryamtanveer307]

Thanks for making the khan academy best channels for everyone love u i user to watch your videos your way of explaining also gives the very right concept and no doubts are left behind

[@prabaljyotichoudhury8448]

Good and correct explanation 👍

[@0ello0]

Thank you sooooo soooo much

[@ksakhilesh123]

Awesome explanation bro

[@08athakwaninandish16]

आपका विवरण सुनके द्रव का पृष्ठ तनाव अच्छे से समझ गया।
Dude your explicit explanation cleared all the doubts. ⭐

[@mahimapasricha6388]

Great!

[@AnonymousAlien2099]

Mind blowing

[@ramolamim2851]

interesting, thanks a lot for that, any video about contact angle ???

[@makoxd1178]

Here is the Link of the Video about contact angle ua-cam.com/video/W3GrSMYbkBE/v-deo.html

[@King_4r7hur01]

So what’s holding up the needle is buoyant force or is that different from surface tension?

[@Hello-qy8vk]

thanks

[@akashsingh-xe3bq]

Really cool

[@goodToBeConfidential]

what is capillary inversion??

[@lishanpereira343]

thx mate

[@memo6032]

Can't thank u enough ❤❤

[@Harekrishnahariom7]

.....and i was struggling with this!!!

[@FAnizah_edits29]

what if you put something with a really high density, higher then the water?? Will it sink or float because of adhesion.

[@Yankee4ever2]

what a lesson

[@mayurakshisingh5922]

sir if an object is floating ....then what does it mean ....like whether it would be moving on the surface of water or just stay stationary at that place if, the density of the obj. is smaller than the density of water.............

[@arshkashyap4434]

Nice

[@alansamkutty6472]

Thank you sar your class was very very good👍👍👍

[@anandsharma9509]

very nice video!!!!

[@sheme110]

The angle at the meniscus for water is it zero or not?

[@salasplayz2597]

Best video out there

[@alheeley]

A few misconceptions there Vicki, surfactant isn't a chemical its the name given to a family of chemicals like detergents that lower surface tension, a surfactant cannot cause surface tension in the lungs or anywhere else, it reduces it. The lungs expand due to the action of the diaphragm muscles causing partial vacuum to expand and squeezing to contract, which sucks air in and out. This has nothing to do with surface tension in the lungs.

[@jellewolters6450]

Yes it does. Surfactant is an important aspect of the lungs, keeping the alveoli open. It decreases surface tension and thereby increases compliance of the lung, as well as making sure the lung does not collapse on expiration. Dipalmitoylphosphatidylcholine is an important surfactant in the lungs, made by type 2 epithelial cells. See Guyton, Medical physiology chapter 39 on pulmonary ventilation.

[@moism]

amazing

[@princessesshusha8837]

Thnak you 🌸

[@makoxd1178]

is thank you not thnak :v

[@akhmadjonovakromjon3669]

The best!

[@biyahanashii7832]

thanks. our subject physics is making me confused since we don't have face to face classes

[@artefukurou851]

so surface tension occurs when the molecules that are in random motion bonds with each other that the ones above have to bond with each other cause there is a strong cohesive force between them. As the molecules on the surface bonds it forms a tension on the surface...so surface tension??

[@elciobarrosmendoncafilho9353]

Is liquid adhesion the same of CAPILARITY?

[@lordvenkatswara8727]

Ossum explanation

[@cybercop3108]

Lord Venkatswara ossum?

[@harshvardhanmankotia6492]

Will salt composition in the water affect the surface tension.

[@thenujansandramohan8930]

HarshVardhan Mankotia yeah it will reduce surface tension

[@mtflieutenant7693]

Surface tension is basically one of the best chapters of Half Life 1

[@logicalphallusry]

So glad I watched this before I got in a bizarre gambling situation in Egypt years ago.

[@mananwashere]

huh ?

[@medoviski3754]

huh?x2

[@saltypakoda5333]

Yo mr joster

[@rafudiasona]

We will never escape jojo's reference

[@prabhatkiranchaulagain1095]

Good explanation.
Love it Samikshaa Aryal
!!!!!!!

[@prabhatkiranchaulagain1095]

*You Samikshaa Aryal

[@CEmpty2044]

I was hearing a music Video named "Surface Tension" then youtube recommends me this
Oh god our Beloved UA-cam.

[@nitink9879]

But for the liquid molecules on the surface, since there is no molecules above them, there will be a resultant force acting in the downward direction . This must help the needle penetrate the liquid. So why don't we consider this into account ?
Why are we only considering the surface tension (which is due to forces on left and right side)

[@snakecodm7249]

NaHBro...the tension acts like a lair to keep the needle up. The net force downwards on the molecules just "tightens" the surface

[@j_ken3424]

GO AHEAD, MR JOESTAR

[@stray_demon]

Wtf how did u read my mind fkkkk lol

[@Shelf0808]

What does this have to do with jojo?

[@j_ken3424]

@@Shelf0808 yare yare, watch part 3 you moron

[@sherazkhan2802]

But what about the lateral and bottom molecules in a glass ... They also experience as unblanced force so why not the water squeeze in the container ...Why doesn't it bocome a big drop in the glass?

[@sughraagha5551]

Because of adhesive force of water with container, the water can't turn into spherical shape.

[@owenjardaneh9113]

i have a question, and excuse my ignorance, anyone can chime in.
is there a way to make water remain in tension or increase the cohesion so that water can contain itself? its a bizarre question and making it happen would probably break a lot of rules about physics and chemistry.

[@caj5140]

DONT ASSUME THE GENDER OF THE WATER MOLECULES!!!!! 1:30

[@slykhajiit2]

hahahah

[@tenzingobom4748]

so u just came here for that ?
dummass

[@imenehk2221]

AHAHAHAHHAHHAHAHHAHAHHAHAHAHHAHAHAHHAHHAHAHHAHAHAHAHHAHAHHAHAHAHAHAHAH

[@tenzingobom4748]

He was right .. u can mention water as a guy as water r calm and always dilute other substances

[@swatikamat1281]

@@tenzingobom4748A joke, bro.

[@ellamuse8865]

But what makes the water molecules stick to the container's surface in adhesion like is it ionic bonding??

[@Alpaslan694]

It's hydrogen bonding between molecules

[@stebobibo]

Why would the water seep into your tent from touching the inside of your tent? Never really explained that, just said "cause surface tension".

[@shahin2324]

Well explained!!!

[@FluidMatters]

A steel needle floats because of the combined effects of surface tension and hydrostatic pressure on the wetted portion of the needle. Not surface tension alone. An over simplification of the physics.

[@logixindie]

Recommended video:
ua-cam.com/video/T99VNB2MSrw/v-deo.html

[@denizcetin675]

If surface tension keeps water molecules on the surface closer together locally, why don't they come down from a local density difference?

[@ashutoshshrivastavnanditat4052]

Why with no water molecules on top creates surface tension? Explanation above doesn't work out. Becoz, even if they were present their contribution towards surface tension was none.