Pressure in liquids | Fluids | Physics | Khan Academy

Why submarines get crushed under water? Due to immense pressure in liquids. Let's learn about pressure in liquids.
Created by Mahesh Shenoy
Khan Academy is a nonprofit organization with the mission of providing free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

[@TheCosmosExplorer]

This is the best channel in the whole world.. I've watched dozens of videos in which they just use the term -"Pascal's law" and start explaining this.. but they don't explain why it happens ( i wanna say that they don't explain Why liquids exert pressure in all directions) but in this video.. everything have been explained so clearly that nothing is remain unexplained and no confusion is there.. I'm really thankful to you -KHAN ACADEMY.. you are a lot much better than other channels (byjus, Vedantu, unacademy, etc) .... You cleared all my doubts... And all that i want to say now is just "Thank you"... ❤️❤️

[@Joy_Nels]

You know !!!! Straight to the point and easy to undersand

[@MuhammadAli-fo5xq]

You did best ❤❤❤❤

[@bhumitshah6845]

I love khan academy, they teach so so good and all for free.

[@khantzinhein2415]

Omg I should have watched this earlier before spending a whole week trying to understand with my peanut brain 😭 A real life saver...❤

[@commonwombat-h6r]

ideal explanation. Thank you so much!

[@rupalijena7350]

Thank you 💖

[@MahalingamPriyanka-lu2ew]

Excellent sir ...than u so much

[@mohsiniqbal1886]

Too good

[@ericrijal]

THANK YOU MEANS A LOTT

[@EpmMaxim]

Thank you!!

[@derliferreira]

Great but Water Cubes are not being squeezed since Water is essentially incompressible.

[@raghav5983]

Ya but somewhere it can be

[@sabarishks6089]

Thank you so much sir. Super explanation 👌👌👌👌👌👍👍👍👍👍👍

[@mridulboro7467]

Its amazing sir, the way you explained it is crystal clear and amazing. Loved it. Thanks a lot😊

[@ashwanisahu8629]

Thanks a lot, amazing explanation with balloon

[@arzaaniya4267]

Fabulous way of explaining any topic

[@theinevitable8778]

Best explanation.

[@ishadixit2014]

Good work thanku

[@srijandas5306]

❤

[@Z-eng0]

Amazing video and explaination thanks , but I was wondering we know that liquid applies horizontal pressure proportional to weight now but how do we know it is *equal to* the weight of water coulumn ?

[@KhanAcademyIndiaEnglish]

Great question. If you consider of a 'cubical piece of water' inside a water body (as shown in the video), the only way that cubical piece can maintain it's shape would be if the pressure from all sides were exactly equal. If the vertical pressure was, say, more than horizontal pressure, then that piece of the cube would ted to flow horizontally. (Remember fluids tend to flow from a region of high pressure to low pressure - that's what makes them a fluid). And we know our 'cube' is not flowing because the water is at rest. Hence the pressure from all sides must be equal. Let me know if you have more questions.

[@Z-eng0]

@@KhanAcademyIndiaEnglish You mean it doesn't deform right ? I think I understand if we're talking that a body placed in water(fluid) doesn't deform

[@miles1357]

BSK gang, rise up

[@kanikachaudhary6089]

Sir can you explain it at molecular levels. The molecules are always flowing so how they at bottom generate more pressure because the molecules in whole liquid flowing with same rate

[@TheCosmosExplorer]

Molecules throughout the liquid aren't flowing at the same rate.. but they do at the same level in a liquid.. the pressure is a lot much more at the bottom because it's bearing the weight of all the molecules of the liquid above it... But at the surface of that liquid the pressure is negligible because above the surface there comes just air pressure which is not much as compared to the liquid pressure.. so the pressure at the bottom is more and so the liquids flows with higher speed or rate at bottom.. and too with a lower rate at the surface.. hope u got it..

[@Adityasinghm26v]

@@TheCosmosExplorer you are absolutely wrong

[@OurDarkUniverse]

@@Adityasinghm26v So what's the correct explanation Sir/Mam?

[@OliviaNerima-wv6of]

Wow

[@Hino_55]

Great analogy sir :)

[@noufalnallattuthodika428]

Good explanation. Can any one explain me, What is the reason behind buoyancy? Will it increase with depth?

[@mm7106]

kzbin.info/www/bejne/eafTZ6CCjMeal68 Watch this I think you will understand

[@Sabikadasan]

Understood 🥰🥰

[@muhammadm4582]

more please

[@420elijah]

I know right!

[@Adityasinghm26v]

What is the cause of pressure in liquids ? Is it due to only collision of the molecules? By this reason, the molecules are colliding more aggressively at the bottom than the top. I think that the cause is due to repulsive forces between molecules.

[@merithall2669]

Sir, could you please explain why fluid pressure is always exerted perpendicular to any surface?

[@patojuanand4639]

Yes

[@muhammadm4582]

solid actually do the horizontal pressure too. as long as the poisson ratio > 1

[@bhumitshah6845]

Can you explain a bit?

[@riddhipatil4788]

👌

[@patojuanand4639]

Sir could u pls explain me y fluid pressure always acts in perpendicular direction

[@sajjadAli-oi7op]

Ask brainly

[@PradeepKanaparthy]

There are soo many creatures living at bottom of the ocean, sea. how would be the impact them? No impact? why?

[@Not-Goji123]

They have special skin to withstand the pressure if you put a tower on a fish i forgot its name it can withstand that even

[@samajsewa4304]

Nice

[@maliah3594]

This is the best explanation I have seen so far

[@IbrahimAli-ej6mn]

Lol nice

[@simam2032]

Bro..water is incompressible..so squeezing work doesn't explain the phenomenon 🙄

[@Not-Goji123]

It's a example dude

[@monicabautista3409]

PUTANGINA GALING MAG-EXPLAINN

[@NiharikaAChirayil]

Thank you! ❤❤