Surface Tension and Adhesion | Fluids | Physics

Surface Tension and Adhesion | Fluids | Physics | Khan Academy

Рет қаралды 721,414

10 жыл бұрын

David explains the concepts of surface tension, cohesion, and adhesion.
Watch the next lesson: www.khanacademy.org/science/p...
Missed the previous lesson? www.khanacademy.org/science/p...
Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry.
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
Subscribe to Khan Academy’s Physics channel: / channel
Subscribe to Khan Academy: kzfaq.info_...

Пікірлер: 173

@isabelaocampo5636 6 жыл бұрын

" 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 4 жыл бұрын

3:24 lol

@bishakhashahrin3247 4 жыл бұрын

best line of the video!

@mustafaali3333-q1m 3 жыл бұрын

That what she said

@FunTime-zi1hi 3 жыл бұрын

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

@bookkkworm Жыл бұрын

that's so cool and fun

@ally-xw2hj 4 жыл бұрын

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

@ShivaPrasad-hm5lk 3 жыл бұрын

What was the project

@tttrendsYT 5 жыл бұрын

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

@bbthebot227 3 жыл бұрын

same lol

@shaunakn5881 3 жыл бұрын

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

@Gaku-tw3bd 3 жыл бұрын

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

@angiem7030 3 жыл бұрын

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

@n1tr1x8 5 жыл бұрын

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

@sophiechuen5707 8 жыл бұрын

U explain it so well, thank you!

@checkm8852 2 жыл бұрын

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

@gathonimwangi6758 4 жыл бұрын

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

@cuong8071 2 жыл бұрын

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😍

@Mohitkumar-mv8mj 5 жыл бұрын

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

@yaleiqiu7687 8 жыл бұрын

best explanation I ever find!

@science-y9209 5 жыл бұрын

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

@akshattripathi5756 2 жыл бұрын

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

@ArielStar 5 жыл бұрын

This was amazingly and simply explained!!

@amileye6924 5 жыл бұрын

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

@danielb.6184 5 жыл бұрын

Very nice explanation, thank you very much!

@Vigi 8 жыл бұрын

Great! Easy to grasp!

@Photosynesthesia Жыл бұрын

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

@jeteloriaga 3 жыл бұрын

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!

@dishayanmandal 5 жыл бұрын

This is really impressive Thank you so much Sir

@hongkijeremy5236 2 жыл бұрын

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

@apurbabauri3878 8 жыл бұрын

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

@chitranshbindal1874 4 жыл бұрын

you should hit the like button 2 times😂🤣

@chitranshbindal1874 4 жыл бұрын

don't take it seriously the video was good

@ShivaPrasad-hm5lk 3 жыл бұрын

It might result in not liking for the 1000th time

@winterblake3321 Жыл бұрын

@@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

@kgkmurthy1961 5 жыл бұрын

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

@Gaku-tw3bd 3 жыл бұрын

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

@shikhanshu 2 жыл бұрын

What an awesome explanation!

@danraul9759 6 жыл бұрын

Man you made this so easy to understand...

@nellyhoffman6194 7 жыл бұрын

Im studying this for my LUNGS physiology khan academy is great

@sisellllesis8872 6 жыл бұрын

it makes sense now. thanks

@abhishekashegoes5957 5 жыл бұрын

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

@peng8151 3 жыл бұрын

great video and examples!

@chimerenwoji4458 4 ай бұрын

You really helped a lot. Thank you so much

@apurvnikum3866 6 жыл бұрын

short and sweet explanation.

@guruofeverything6379 3 жыл бұрын

Finally, somebody who explains it properly !!!!

@moa9644 7 жыл бұрын

Thanks a lot ❤️️

@anushkarajora8084 4 жыл бұрын

Loved it thanks sir

@vedantsingh8582 3 жыл бұрын

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

@Honey_Bun_34 3 жыл бұрын

THANKS A LOT HELPED ME A BUNCH

@vedbhobe9420 3 жыл бұрын

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

@maryamtanveer307 2 жыл бұрын

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

@iYakuza11 Жыл бұрын

Well done, Sir. Amazing explanation 👏

@muzamelpamir4336 6 жыл бұрын

Very well explanation

@AnonymousAlien2099 6 жыл бұрын

Mind blowing

@user-hv6ef9ie1g 2 ай бұрын

Nice explanation!

@mahimapasricha6388 5 жыл бұрын

Great!

@ksakhilesh123 5 жыл бұрын

Awesome explanation bro

@ffveteran2309 Жыл бұрын

You really made it easy and time saving

@08athakwaninandish16 2 жыл бұрын

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

@0ello0 5 жыл бұрын

Thank you sooooo soooo much

@cikif 7 жыл бұрын

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

@akhmadjonovakromjon3669 5 жыл бұрын

The best!

@memo6032 4 жыл бұрын

Can't thank u enough ❤❤

@akashsingh-xe3bq 4 жыл бұрын

Really cool

@prabaljyotichoudhury8448 4 жыл бұрын

Good and correct explanation 👍

@bizarrelance3698 10 ай бұрын

These videos are life savers.

@omengdadong7703 6 жыл бұрын

What principle in physics behind the surface tension?

@anandsharma9509 5 жыл бұрын

very nice video!!!!

@aaranyachaturvedi6225 3 жыл бұрын

Probably the best vdo on this topic

@arshkashyap4434 6 жыл бұрын

Nice

@corrupted9588 9 ай бұрын

i have been enlightened

@yogeshkumarmatlapudi9603 2 жыл бұрын

Excellent ly explained sir

@alheeley 9 жыл бұрын

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 6 жыл бұрын

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.

@Hello-qy8vk 5 жыл бұрын

thanks

@bipasharouth4585 5 жыл бұрын

Thanks sir

@salasplayz2597 2 жыл бұрын

Best video out there

@mayurakshisingh5922 6 жыл бұрын

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.............

@Yankee4ever2 4 ай бұрын

what a lesson

@moism 5 жыл бұрын

amazing

@alansamkutty6472 4 жыл бұрын

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

@Harekrishnahariom7 2 жыл бұрын

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

@ramolamim2851 7 жыл бұрын

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

@makoxd1178 5 жыл бұрын

Here is the Link of the Video about contact angle kzfaq.info/get/bejne/jZl3pbZ-vsjPcnk.html

@King_4r7hur01 3 жыл бұрын

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

@lishanpereira343 3 жыл бұрын

thx mate

@mtflieutenant7693 2 жыл бұрын

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

@olajumokealbert6578 2 жыл бұрын

Thanks

@CEmpty2044 3 жыл бұрын

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

@logicalphallusry 4 жыл бұрын

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

@mananwashere 4 жыл бұрын

huh ?

@medoviski3754 4 жыл бұрын

huh?x2

@saltypakoda5333 4 жыл бұрын

Yo mr joster

@rafudiasona 4 жыл бұрын

We will never escape jojo's reference

@FAnizah_edits29 3 жыл бұрын

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

@prabhatkiranchaulagain1095 5 жыл бұрын

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

@prabhatkiranchaulagain1095 5 жыл бұрын

*You Samikshaa Aryal

@ambarishphysics 2 жыл бұрын

CHECK OUT MY ORIGINAL SOLUTION TO A TRICKY SURFACE TENSION CHALLENGE HERE: kzfaq.info/get/bejne/bq14p9uAybvPiHk.html

@princessesshusha8837 5 жыл бұрын

Thnak you 🌸

@makoxd1178 5 жыл бұрын

is thank you not thnak :v

@goodToBeConfidential 6 жыл бұрын

what is capillary inversion??

@lordvenkatswara8727 6 жыл бұрын

Ossum explanation

@cybercop3108 6 жыл бұрын

Lord Venkatswara ossum?

@artefukurou851 2 жыл бұрын

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??

@biyahanashii7832 2 жыл бұрын

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

@sheme110 4 жыл бұрын

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

@harshvardhanmankotia6492 4 жыл бұрын

Will salt composition in the water affect the surface tension.

@thenujansandramohan8930 4 жыл бұрын

HarshVardhan Mankotia yeah it will reduce surface tension

@j_ken3424 4 жыл бұрын

GO AHEAD, MR JOESTAR

@stray_demon 4 жыл бұрын

Wtf how did u read my mind fkkkk lol

@Shelf0808 4 жыл бұрын

What does this have to do with jojo?

@j_ken3424 4 жыл бұрын

@@Shelf0808 yare yare, watch part 3 you moron

@shahin2324 4 жыл бұрын

Well explained!!!

@nitink9879 3 жыл бұрын

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 3 жыл бұрын

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

@elciobarrosmendoncafilho9353 2 жыл бұрын

Is liquid adhesion the same of CAPILARITY?

@owenjardaneh9113 4 жыл бұрын

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 6 жыл бұрын

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

@slykhajiit2 6 жыл бұрын

hahahah

@tenzingobom4748 5 жыл бұрын

so u just came here for that ? dummass

@imenehk2221 5 жыл бұрын

AHAHAHAHHAHHAHAHHAHAHHAHAHAHHAHAHAHHAHHAHAHHAHAHAHAHHAHAHHAHAHAHAHAHAH

@tenzingobom4748 5 жыл бұрын

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

@swatikamat1281 5 жыл бұрын

@@tenzingobom4748A joke, bro.

@stebobibo 4 жыл бұрын

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

@sherazkhan2802 7 жыл бұрын

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 5 жыл бұрын

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

@sidetracked121 8 жыл бұрын

Thanks thanks thanks thanks!

@FromThe3021 3 жыл бұрын

Camping alone will give you blue balls, point taken.

@ellamuse8865 5 жыл бұрын

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

@Alpaslan694 Жыл бұрын

It's hydrogen bonding between molecules

@FluidMatters 3 жыл бұрын

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.