We made quiz questions to help you review the content in this episode! Find them on the free Crash Course App! Download it here for Apple Devices: apple.co/3d4eyZo Download it here for Android Devices: bit.ly/3TW06aP
These physics videos make me appreciate it so much more! Thank you, crash course, for helping tons of students not only learn but actually like the subjects taught to us.
I cannot believe how WELL this series is able to connect everything. From episode to episode, I've been able to put all these abstract concepts in my head together. This one was the definition of pressure. Thank you. I have a final tomorrow and barring my awful math skills and the teacher's insistence on that we must be tricked at all times, I feel -conceptually- ready.
You should do Crash Course computers (computer science) and Crash Course electronics as theese are some of the most important industries out there. I think that a CC computers and a cc electronics would inspire young people to pursue a career in the two fields, and show them that it's easier than you'd imagine.
Chow Tom LOLOLOL I took my first high level Chemistry course 4 years ago, and have had multiple higher level courses since then, like Drug Pathophysiology, where we talk about how medicines move through the body, what properties they have that make them bind to receptors in the body and stuff. If anything, that makes me more salty. By the way, no disrespect to you with all the lol's, I'm just wiping the salt off my face because I was just one year too early to have this stuff when I needed it the most.
when i was around 13 ( i'm a 16 y.o romanian boy ) i've learned in school the boyant force..called here archimedes force, and when i asked the teacher if always the same percentage of an iceberg remains under water (it's about 90 percent and she said yes ) i had some sort of a smaller eureka moment :)). that day i made a formula of what percentage of a body's volume remains under water, and it was the body's density divided by the fluids density and multiplied by 100 ( if the percentage is bigger then 100 it obviously sinks ). when i showed it to the teacher she took a brief look, and said it's completely wrong, she didn't like me that much. it's so bad to have dumb teachers..but gladly we have crashcourse now! :))
Hey Crash Course you're doing an incredible job! Keep going!!! What about doing a CRASH COURSE MUSIC?? For example, teaching us how to read music or the different music genres and their characteristics, such as Rhythm or their harmonies or even their history.I really think it would be a very great idea :)
i spent 2 hours trying to solve a physics problem and failed. 2 mins into this video and I solved it. Thanks for making me feel bad about paying for my tuition. :)
4:00 y0u left 0ut a key feature in that the f0rce and distance m0ved are inversely related. s0 in y0ur example, it "d0ubled the f0rce which means it w0uld m0ve "half the distance. s0 if y0u m0ved 2in 0n the input, it w0uld 0nly m0ve 1in 0n the 0utput.... s0 its d0uble the f0rce but in half the distance. the same equati0ns apply t0 pulleys (I believe).
Since you have done a crash course on astronomy and on Classical Physics could you do one on Quantum Mechanics??I know that you have a couple of videos on nuclear physics for crash course chemistry but a whole series dedicated to quantum mechanics,nuclear physics and fundamental particles would be extremely interesting.
"Thanks to Archimedes, we know why objects float and sink." 8:37 Isn't it more accurate to say that since Archimedes, we know HOW they float and sink, but not WHY? It seems to me that the terminology used to explain the differences in forces is Newtonian physics rather than classical physics. Don't want to nitpick though, I love this series!
I found that the most fascinating application of Archimedes' principle is the Falkirk Wheel in Scotland. Plus, there's a whole lot of interesting physics behind it, anyway.
I have a question about the last case she talked about the ball being halfway in the water, yes forces cancel out but why is that? is it because of the density of the material the ball is made of that is equal to the water's or is it something else?
I have to say, I could not be more thankful for Crash Course Physics. With the beautiful and helpful graphics and impeccable writing, this series and everyone who worked on it is what is keeping me at an A+ in Physics for Bio Majors
Thank you! We've learned at school about Archimede's principle and I managed to do pretty well, but it was something weird about it that just made me think it wasn't intuitive at all ! After I watched your video something just clicked in my mind and now it seems very simple and logical to me ! I know this sounds pretty generic and you get these kinds of comments every day, but I just wanted to say it was an eye opener for me! ☺
Shini is so beyond beautiful, I now know what "lost in your eyes" means. I have to watch it twice just to catch it all, First time for everything. Femininity incarnate
+Darius Niederer He was apparently killed by a roman soldier after they had attacked his home city. The roman commander knew how smart he was and wanted him alive but when the soldier told him to come with him he told him not to disturb the calcu ations he was drawing in the sand. He was promtly struck down. Apparently he had previously also designed war machines to help defend Syracause although some of them like ship-burning mirrors seem to belong to fiction,
I remembered diving to the bottom of a 16 foot deep pool once and it hurt like crazy. I just worked it out and apparently it was only a pressure of about 1.5 atmospheres or ~150 kilopascals. Not nearly as much as I thought it would be based on how it felt. Shows just how sensitive people are to pressure changes. Though I'm sure it would have helped if I popped my eardrums by blowing out with my nose plugged.
+CrashCourse im beginning to wonder how you turn profit off of this show. the production value seems to be pretty expensive, and you dont get the highest number of views.
I am not sure if lessons should be delivered with such speed. Students who just started learning about pressure will probably be lost at the latter part.
AFAIR from my course in Control and Automation Engineering, m/v is not density but specific mass; density is the specific mass of a fluid in relation to the specific mass of water, whic is 1. :T
If the Bernulli equation is solved, the final pressure (P) is equal to the initial pressure (Po) plus ¡ 2 times ! the density (times the acceleration constant by gravity) (times the difference in fluid heights) !! P = Po + 2gΔh !!! Thanks for the video is very useful
So, force of gravity on ball depends on mass, and force of buoyancy depends on volume. I have a question. Imagine a cylinder which height is greater than its diameter (so it's a thin cylinder). First it is placed horizontally on the water, then it is placed vertically in the water. Since buoyancy is the resultant force from a difference in pressure, can I conclude that the cylinder in the second situation experiences a larger buoyancy force than that of the first situation because of its orientation?
Thanks for the helpful video. However, I still have a doubt to which I'm not able to find a satisfactory answer, i.e. What actually causes Upthrust? As in why should liquids exert a force in the Upward direction? I know that liquids exert pressure in all directions, but what causes this at the molecular level? Thanks.
Just 2 more months and I never have to think of this confusing stuff again. I understand the basic stuff that we learn in elementary school but when it gets more complicated and I try to apply it, it makes no sense.
Short answer is air mass movements related to differences in pressures, condensation, and a given airmass' ability to sustain a given level of water vapor. Its more meteorology and other physics than fluid dynamics. I'm no expert, and I am going off memory here... so take that for what its worth.
Great video! Any teasers for future possible subjects? I'm training to be an engineer and these videos are extremely entertaining (such as compression/tension or materials) :P
Does Pascal's Principle actually happen instantaneously? Conceptually it is the molecules of the object you are applying for to pushing the molecules of the liquid or gas closest to it, which in turn push the molecules next to it, so on and so on.
Watching this as I study for the MCAT. Great over views of the things I read. Very thorough. Sometimes a bit fast but that's what rewind is for ^_^. Thank-you for posting these. Physics and fluids are by far my worst subject
The video is meant for people with a basic idea on the subject. This channel is called ‘crash course’ physics for a reason .. so stop complaining about how fast she’s talking ..
This is very interesting video for all the educated children and it is very useful and important to all the members who are watching this video and by this who not under stood in school or in the college this is the best and simple way to understand to all the students and for teachers also
what gets conserved when you use a hydraulic lift? Its cool that you can magnify your force, but has to come at a cost? Intuition says work(energy) has to be conserved, but I don't see how.
8 ปีที่แล้ว
You're right, it's work, of course neglecting friction. And you can see it by another conserved quantity, the volume displaced. That volume would be Area x Distance. As Area=Force/Pressure, and Pressure is the same according to Pascal's principle, you have that Force x Distance is also conserved, and that is work.
Content table Fluid at rest Pascal's principle Manometer's and barometer Archimede's principle Buoyant force (Pressure on water at bottom greater than water at the top)
The manometer works only in when one of the pressure is atmospheric pressure right or else won't the pressure exerted by the bike tire( for example) increase the pressure of the other end and thus there is an interference?
Discussion was vry interactive and helpful. Specially, presentation is very good. Thank You dear Mam for making such videos. If it can be still slow, it could have been better. But still it is very helpful to understand the concepts. Thank You again.
We made quiz questions to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: apple.co/3d4eyZo
Download it here for Android Devices: bit.ly/3TW06aP
when you explain it: interesting! makes sense!
when my teacher explains it: gibberish
Is it just me or she sounds more excited in this episode?
Makes sense given she said it was her area of expertise
Engineers love fluids!!
Cubestormer Iv I
I mean, this is some really cool stuff.
The description box says she is a Fluid Dynamicist
These physics videos make me appreciate it so much more! Thank you, crash course, for helping tons of students not only learn but actually like the subjects taught to us.
This is interesting as hell, shame I’m trying to understand this at 10 pm for a test I have tomorrow ☹️
thats a .... cool username
Wow, I just watched a whole chapter in Fluid book in 10 minutes with a fully understanding !!
Thanks a lot Crash-course, That's a GREAT WORK !!!
Cheers to the ThoughtCafe! Must be very hard to animate such complex topics, especially if you only have a script to work with.
Thank you so much.. I finally understand 😭❤️ you’re helping me pass first semester physics
True that!
I cannot believe how WELL this series is able to connect everything. From episode to episode, I've been able to put all these abstract concepts in my head together. This one was the definition of pressure. Thank you. I have a final tomorrow and barring my awful math skills and the teacher's insistence on that we must be tricked at all times, I feel -conceptually- ready.
You should do Crash Course computers (computer science) and Crash Course electronics as theese are some of the most important industries out there. I think that a CC computers and a cc electronics would inspire young people to pursue a career in the two fields, and show them that it's easier than you'd imagine.
Yeah yeah yeah yeah yeah yeah yeah!!!! I need it badly!!
its already there
check b4 u comment
@@ArnyBoy you realise that you replied a year later right?
@@adeleke5140 so did you
I finished my first and only Physics course this past spring. Still super salty that I didn't have this available to me then.
salty, well you have CC Chemistry :P
Sucks dont it
Chow Tom LOLOLOL I took my first high level Chemistry course 4 years ago, and have had multiple higher level courses since then, like Drug Pathophysiology, where we talk about how medicines move through the body, what properties they have that make them bind to receptors in the body and stuff. If anything, that makes me more salty.
By the way, no disrespect to you with all the lol's, I'm just wiping the salt off my face because I was just one year too early to have this stuff when I needed it the most.
Jeremy this got me to a 5 on physics 1
I just want to say that these graphics are just so gorgeous!
my exam is in half hour and this is first time I am hearing something like this. 😢😢😢
I feel you :/
How did it go?
Funeral was last week it's too soon to talk about it my friend
how you did?
Lol.
My textbook's 30 pages summed up in 10 minutes. Keep these videos coming. They help me revise well. :")
THANK YOU SO MUCH FOR EXPLAINING AN ENTIRE CHAPTER IN 10 MINS!!!
when i was around 13 ( i'm a 16 y.o romanian boy ) i've learned in school the boyant force..called here archimedes force, and when i asked the teacher if always the same percentage of an iceberg remains under water (it's about 90 percent and she said yes ) i had some sort of a smaller eureka moment :)). that day i made a formula of what percentage of a body's volume remains under water, and it was the body's density divided by the fluids density and multiplied by 100 ( if the percentage is bigger then 100 it obviously sinks ). when i showed it to the teacher she took a brief look, and said it's completely wrong, she didn't like me that much. it's so bad to have dumb teachers..but gladly we have crashcourse now! :))
So the equation is something like [density of floating thing]/[density of fluid]=[fraction of floating thing that is below water]
relatable bro
You're an amazing teacher Thanks
Hey Crash Course you're doing an incredible job! Keep going!!! What about doing a CRASH COURSE MUSIC?? For example, teaching us how to read music or the different music genres and their characteristics, such as Rhythm or their harmonies or even their history.I really think it would be a very great idea :)
why did I sign up for physics
Because if you can use it to springboard into engineering which pays big bucks
+Adam Pardoe yurp
and you get paid big bucks to do impressive things as well, which is better than sitting at an office filing paperwork.
i spent 2 hours trying to solve a physics problem and failed. 2 mins into this video and I solved it. Thanks for making me feel bad about paying for my tuition. :)
Thanks crashcourse tommorrow is my test and this video has made it easier for me to understand fluids.
1:13 *Americans* : that’s insulting and unacceptable.
I love the pile of Feynman Lectures on Physics on your desk.
Best review video on static fluids I've seen! Thank you!!
4:00
y0u left 0ut a key feature in that the f0rce and distance m0ved are inversely related.
s0 in y0ur example, it "d0ubled the f0rce which means it w0uld m0ve "half the distance.
s0 if y0u m0ved 2in 0n the input, it w0uld 0nly m0ve 1in 0n the 0utput....
s0 its d0uble the f0rce but in half the distance.
the same equati0ns apply t0 pulleys (I believe).
Since you have done a crash course on astronomy and on Classical Physics could you do one on Quantum Mechanics??I know that you have a couple of videos on nuclear physics for crash course chemistry but a whole series dedicated to quantum mechanics,nuclear physics and fundamental particles would be extremely interesting.
This is something I've been pitching for a while, but it would be a significant step for us. We're working on it at some point though :)
-Nick J.
She is one of the best presentets. Have her on more often please
Presenters*
+Neeni1994 Screw how she looks like. I could listen to this smartness whole day.
FLUID DYNAMICS
OOOHHH BOOY THIS IS GONNA BE A RIDE.
"Thanks to Archimedes, we know why objects float and sink." 8:37
Isn't it more accurate to say that since Archimedes, we know HOW they float and sink, but not WHY? It seems to me that the terminology used to explain the differences in forces is Newtonian physics rather than classical physics.
Don't want to nitpick though, I love this series!
So this isn't about drinking water before bed?
LOL
You will sink
Nice work, this series is really starting to get into stride
man give the comment section a glass of water! you are watching physics not biology ;-)
I found that the most fascinating application of Archimedes' principle is the Falkirk Wheel in Scotland. Plus, there's a whole lot of interesting physics behind it, anyway.
Love the added animations!
I have a question about the last case she talked about the ball being halfway in the water, yes forces cancel out but why is that? is it because of the density of the material the ball is made of that is equal to the water's or is it something else?
I have to say, I could not be more thankful for Crash Course Physics. With the beautiful and helpful graphics and impeccable writing, this series and everyone who worked on it is what is keeping me at an A+ in Physics for Bio Majors
physics issa my life
why isn't episode 13 in the playlist? it says its deleted but you can still watch from some where else. it s about static.
Fixed it. Thanks for the heads up!
Nick J.
Thank you! We've learned at school about Archimede's principle and I managed to do pretty well, but it was something weird about it that just made me think it wasn't intuitive at all ! After I watched your video something just clicked in my mind and now it seems very simple and logical to me ! I know this sounds pretty generic and you get these kinds of comments every day, but I just wanted to say it was an eye opener for me! ☺
I don't study physics or use it in my work. But I could listen to Shini talk all day.
Hm seems youd be the type to go for Lara croft too. both british
Eileen Blurrr There's more to having a great voice than just the accent.
Yeah but Lara crofts voice actor is pretty good sounding too. at least for that new game
Shini is so beyond beautiful, I now know what "lost in your eyes" means. I have to watch it twice just to catch it all, First time for everything.
Femininity incarnate
Archimedes lived in Syracuse, Sicily (then a Greek colony)
Exactly!
YES and that was in Sicilly, modern day Italy, not greece but I guess this is about phisics and not history.
+Darius Niederer He was apparently killed by a roman soldier after they had attacked his home city. The roman commander knew how smart he was and wanted him alive but when the soldier told him to come with him he told him not to disturb the calcu
ations he was drawing in the sand. He was promtly struck down. Apparently he had previously also designed war machines to help defend Syracause although some of them like ship-burning mirrors seem to belong to fiction,
That's what I tell everyone at work when I arrive.
The Greeks and the Phoenicians both had trading outposts, colonies, all around the Mediterranean Sea, usually pretty close to each other.
I remembered diving to the bottom of a 16 foot deep pool once and it hurt like crazy. I just worked it out and apparently it was only a pressure of about 1.5 atmospheres or ~150 kilopascals. Not nearly as much as I thought it would be based on how it felt. Shows just how sensitive people are to pressure changes. Though I'm sure it would have helped if I popped my eardrums by blowing out with my nose plugged.
thanks this vido was understandable to me
Awesome explanation!
Are you planning on making more shows?
Yep. Many many shows. Many!
-Nick J.
Yay :D
+CrashCourse
im beginning to wonder how you turn profit off of this show.
the production value seems to be pretty expensive, and you dont get the highest number of views.
I hope for a Crash Course Geology.
The aim is most likely to break even.
I am not sure if lessons should be delivered with such speed. Students who just started learning about pressure will probably be lost at the latter part.
Explanation is so interesting.. Keep it up..animation is also interesting make more videos as possible u r awesome
I kind of love you. ❤️
Thanks for making science easy for me.
Truly a crash course, thx :3
symmetra?
You're the only one who sees that.
lol good one
made my day
Nah Pharah
Symmetra a better fit since this the course is Physics.
Very educating. A big thumbs up from Norway!
I love this "new girl". She just like the main two guys looks incredibly presentable, plus love her accent.
this is some serious editing pls tell me what you used to edit this video
Oh nooo I need more videos! My final is in a week and theres still more material I wanna watch a crash course video about!D;
this explained the buoyant force so well
I love physics
God! Why is Shini so cute when she's excited! Look at her smiling the whole video!
She is SUPER excited.
AFAIR from my course in Control and Automation Engineering, m/v is not density but specific mass; density is the specific mass of a fluid in relation to the specific mass of water, whic is 1. :T
If the Bernulli equation is solved, the final pressure (P) is equal to the initial pressure (Po) plus ¡ 2 times ! the density (times the acceleration constant by gravity) (times the difference in fluid heights) !! P = Po + 2gΔh !!! Thanks for the video is very useful
So, force of gravity on ball depends on mass, and force of buoyancy depends on volume.
I have a question. Imagine a cylinder which height is greater than its diameter (so it's a thin cylinder). First it is placed horizontally on the water, then it is placed vertically in the water. Since buoyancy is the resultant force from a difference in pressure, can I conclude that the cylinder in the second situation experiences a larger buoyancy force than that of the first situation because of its orientation?
Thanks for the helpful video. However, I still have a doubt to which I'm not able to find a satisfactory answer, i.e. What actually causes Upthrust? As in why should liquids exert a force in the Upward direction? I know that liquids exert pressure in all directions, but what causes this at the molecular level?
Thanks.
Best cc vid
Thank you, thank you so much for Crash course physics!
More fluid dynamics please :)
Will you be talking about turbulent flows next week? It would be awesome!
Just 2 more months and I never have to think of this confusing stuff again. I understand the basic stuff that we learn in elementary school but when it gets more complicated and I try to apply it, it makes no sense.
5:52 How is it that having a lower atmospheric pressure means there is a storm coming?
And this episode was awesome! Thank you so so so much, CrashCourse!
Short answer is air mass movements related to differences in pressures, condensation, and a given airmass' ability to sustain a given level of water vapor.
Its more meteorology and other physics than fluid dynamics.
I'm no expert, and I am going off memory here... so take that for what its worth.
Very helpful and she's gorgeous!!
I really do like your derivation of the Buoyant force!!
Great video! Any teasers for future possible subjects? I'm training to be an engineer and these videos are extremely entertaining (such as compression/tension or materials) :P
Thank you for this course. At last I understood how to calculate the mass of an immersed object...
Does Pascal's Principle actually happen instantaneously? Conceptually it is the molecules of the object you are applying for to pushing the molecules of the liquid or gas closest to it, which in turn push the molecules next to it, so on and so on.
Really usefull! And in perfect timing! Thanks!
When is the next episode and how long do you expect the series to last?
Need to take her class asap!
Watching this as I study for the MCAT. Great over views of the things I read. Very thorough. Sometimes a bit fast but that's what rewind is for ^_^. Thank-you for posting these. Physics and fluids are by far my worst subject
pause 1:47 to feel the pressure
The video is meant for people with a basic idea on the subject.
This channel is called ‘crash course’ physics for a reason .. so stop complaining about how fast she’s talking ..
Your videos help so much thank you
Nice one , best for clearing concepts
Wonderful explanation!😊
When in the series are you guys going to cover electromagnetism?
Very helpful
Cheers love!
More episodes of physics please!
We've got 48 planned. :)
Nick J.
+CrashCourse I am a student from Iran and this video rarely helped me thanks very much
This is very interesting video for all the educated children and it is very useful and important to all the members who are watching this video and by this who not under stood in school or in the college this is the best and simple way to understand to all the students and for teachers also
It's very nice
what gets conserved when you use a hydraulic lift? Its cool that you can magnify your force, but has to come at a cost? Intuition says work(energy) has to be conserved, but I don't see how.
You're right, it's work, of course neglecting friction. And you can see it by another conserved quantity, the volume displaced. That volume would be Area x Distance. As Area=Force/Pressure, and Pressure is the same according to Pascal's principle, you have that Force x Distance is also conserved, and that is work.
7:14 You wrote "bouyancy" but meant "buoyancy"
Content table
Fluid at rest
Pascal's principle
Manometer's and barometer
Archimede's principle
Buoyant force (Pressure on water at bottom greater than water at the top)
awesome video !! thanks
guys ... a solids mechanics video needed please
so much better explained than my old science teacher ^-^
The manometer works only in when one of the pressure is atmospheric pressure right or else won't the pressure exerted by the bike tire( for example) increase the pressure of the other end and thus there is an interference?
at 3:57 won't the water spill
For sure it will!
Discussion was vry interactive and helpful. Specially, presentation is very good. Thank You dear Mam for making such videos. If it can be still slow, it could have been better. But still it is very helpful to understand the concepts. Thank You again.
Thanks you . You are just Awesome, I love to learn physics with you😋
Very nice video !
This will probably get me a 10 in GCSE physics
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