Almost two years ago I watched your final lecture in MIT and I showed the video to my friends saying how I wish I had been taught by professor's like you. I even said one day I want to become like Walter Lewin. Thank you so much for sharing your wonderful brains with us here on RUclips.
Sir( my Professor) I respect you a lot, you are the best physicist i have ever seen, thank you a lot, i watched all your lectures, i spent months learning only from your lectures , you are great. the fun you make in physics made me love her . THANKS
I have a question about these water flow experiments. 1) Would it make any difference if you used carbonated water for the experiment. Swirling it, would cause gas to escape from water...which would raise the pressure on top bottle, helping to push down the liquid...maybe. I haven't tried it. 2) Does the shape of the bottle matter. A funnel shape vs flat bottom( like an upside down beer can ) 3) Whats the most effective way to transfer a more viscous liquid(like honey) from top bottle into lower bottle :)
I sincerely believe that if there were more people like you on this planet, there would be a lot more of educated people. Thank you for every uploaded video professor!
Dear sir , i already knew about vortex , didn't know the word "vortex" , but knew it was the fastest way for water to leave the bottle , knew from my experience 😊😊
I'm at 1:09. The answer is to invert the bottles slowly so that the liquid and gas (air)can pass thru the opening in different directions with the least amount of resistance. By inverting slowly you allow the pressures to equalize and a smooth transfer of both "fluids".
nice set of demonstrations. have you tried adding washing up liquid to test whether lowering the surface tension allows the water to flow more easily in the non vortex case?
Yep ... that was fun to play with. I disassembled mine. Mine was pretty fast wo vortex as well. Never saw it stop. I still think roughness in the connection inner wall played a large role in that. Anyway, thanks for posting these problems. They are fun. Pendulum was a little hard for me. Usually i have good intuition, but when you start writing formula's i often lose track in seconds. My education stopped when completing MTS Vlissingen, but with all this online material i plan on improving.
First time i saw your videos sir, i thought this, "i wanna be there, i should be there," i didnt know your youtube channel but now i found, English is not my native language but i'll make it perfect so i can understand well your lessons. Thank you sir, for being a great professor.
I just feel very happy to see the excitement in his face everytime I watch his videos. A person with so much dedication and love for physics! Love you for sharing your love for physics! :)
Walter Lewin, I want your mind. You have truly made physics legendary and always relevant for us. Your reactions to a demonstration are enlightening. I wish I could think of each experiment the same way you do. We will always be friends and you will be the 26-100 godfather of physics.
sir you have changed my life, I loved physics earlier, and I found out about your videos and I am in love with the beauty of physics, I currently 15 and learning and having fun because of your videos :)
I just love watching your video's. Not reacting alot but that shouldn't be a problem, I hope :) It seems amazing what physics can do... even stopping a fluid to go through a hole! Just wanted to give a bit of youtube advice after seeing this video. This video seems to have been 'edited' by 'improving' the quality of the video by RUclips. My advice would be, please don't use that function as it moves steady objects around and stops moving objects to move. Which I think, physically would be impossible, but you may prove me wrong. Best regards from the Netherlands, Anton Draaisma
sir I am from India have just completed my class 12 and I am thinking for opting btech in mechanical engineering . I started watching your videos from yesterday night and have become a huge fan of yours . Sir your lectures are excellent will u kindly tell me sir whether ur videos will help me for btech
he taught at MIT. Now he does, kind of. I mean he does post some problems but his lectures are watched constantly. So in a way he is still teaching, and will keep doing that after his death (benefits of a digital age + great instructor!)
Although its a fun video i would like to commend a probable explanation and plz correct me....I believe that the pressure gradient on the boundary of the water meniscus and the air on the lower bottle not be overcome the water surface tension and so it wont let the water pass through...:)
Your explanation is awesome sir... Can you suggest me physics books at undergraduate nd PG LEVEL and schlorships for Masters IN PHYSICS...... AWESOME explanation....
What advice can you give to students like me who are trying to understand and love physics but often get tangled in its imagination.....( as I am writing this, it reminds me of the times when you said to me that these lectures are a bit more for me and that these lectures were given in MIT.....) I really love physics and I love seeing it in action.....(I recently saw a video on internet where they showed water drops floating on water without being coalescing into it......and then when I saw it happening at my home, I quickly made a video of it in slow-motion and when I saw it and the physics, it gave me so much joy.......and it reminded me of YOU and your CHANNEL's name- "Lectures by Walter Lewin. They will make you ♥ Physics"........
It's very hard Yash to give people advice as they have so very different backgrounds, different natures, different disciplines, different passion, different ambitions. You have a problem that you often dig your heels in on an issue that is unrelated to the big picture and you won't let go till I write :this is my last msg on this topic". ONLY 1 example. launch a 1/8" ball bearing from the surface of the Earth to make it escape the Earth gravity. That speed can be calculated taking the air drag into account. It's NOT an easy problem as the air density is a strong function of altitude. But it can be done. Now take a 1/8" feather, or take a tree and launch if rom the Earth surface to make it escape Earth gravity. The answers are WILDLY different from the one for the ball bearing and the feather would simply NEVER make it regardless of what speed you gave it. You wouldn't let go. That means you got hung up on details as the basic concept of escape velocity is way more important then to do it from below the atmosphere. The Moon has no atmosphere and if a planet has one then the escape vel holds as long as you are outside the atmosphere. >>>>>I really love physics and I love seeing it in action.....(I recently saw a video on internet where they showed water drops floating on water without being coalescing into it.>>>>>
I usually try hone at one point because I like to question each and everything that you say in your lecture because I know you are a good teacher and so I don't want to misinterpret any of the things that you say and that makes me into smaller and smaller things even if it does not relate to the big picture...... for example when I asked you about why we ignored atmospheric pressure in case of escape velocity then FIRSTLY, it was sheer out of my curiousness because I wanted to know why we ignored it and not just listen to it as a speech and then move onto the next line......and SECONDLY, since we earlier studied in Lect-12 about air drag so I was curious why we couldn't use it......... P.S. for the video that I mentioned about water drops, they said that it happens for only special frequencies of water in which case the water droplet falls on a trough of the water wave and the trough provides the cushion action to let the water droplet hold its shape......
Lectures by Walter Lewin. They will make you ♥ Physics. One question: was it Maxwell or Michelson-Morley who determined light in vacuum was c for all observers?
Sir, I propose that if two black holes of equal mass interact with each other then they can accelerate particles through their point of contact. Sir, this is just a brief idea about the theory. I just wanted to know if this is an absurd idea or a great idea. Please reply as soon as possible.
Lectures by Walter Lewin. They will make you ♥ Physics. An unrelated question. From what I remember, gravity waves and light waves have the same velocity. Does it mean their intensity decreases at the same rate?
I have a physics ? for you why does the old billiard balls not carom the way new billiards balls do. you can't use Willie hoppe formula for carom shots
Almost two years ago I watched your final lecture in MIT and I showed the video to my friends saying how I wish I had been taught by professor's like you. I even said one day I want to become like Walter Lewin. Thank you so much for sharing your wonderful brains with us here on RUclips.
thanks for your kind words
Sir( my Professor) I respect you a lot, you are the best physicist i have ever seen, thank you a lot, i watched all your lectures, i spent months learning only from your lectures , you are great. the fun you make in physics made me love her . THANKS
:)
Learning having fun is the best way to learn. Thank you again Professor.
:)
I have a question about these water flow experiments.
1) Would it make any difference if you used carbonated water for the experiment. Swirling it, would cause gas to escape from water...which would raise the pressure on top bottle, helping to push down the liquid...maybe. I haven't tried it.
2) Does the shape of the bottle matter. A funnel shape vs flat bottom( like an upside down beer can )
3) Whats the most effective way to transfer a more viscous liquid(like honey) from top bottle into lower bottle :)
use google
Very nice. The surface tension is counter-balancing the gravity pull.
You're truly an amazing teacher.
:)
I sincerely believe that if there were more people like you on this planet, there would be a lot more of educated people. Thank you for every uploaded video professor!
Dear sir , i already knew about vortex , didn't know the word "vortex" , but knew it was the fastest way for water to leave the bottle , knew from my experience 😊😊
we are still friends right sir?? :)
ofcos
I'm at 1:09. The answer is to invert the bottles slowly so that the liquid and gas (air)can pass thru the opening in different directions with the least amount of resistance. By inverting slowly you allow the pressures to equalize and a smooth transfer of both "fluids".
Professor, what is that ring on your finger? Is that a special ring?
Everytime I watch the vortex I become memorised by it 😂😂 have a great day Walter
:)
nice set of demonstrations. have you tried adding washing up liquid to test whether lowering the surface tension allows the water to flow more easily in the non vortex case?
Yep ... that was fun to play with. I disassembled mine. Mine was pretty fast wo vortex as well. Never saw it stop. I still think roughness in the connection inner wall played a large role in that.
Anyway, thanks for posting these problems. They are fun. Pendulum was a little hard for me. Usually i have good intuition, but when you start writing formula's i often lose track in seconds. My education stopped when completing MTS Vlissingen, but with all this online material i plan on improving.
I love this!
Btw professor I received the book! Thank you so much! i'm reading it on my commute :)
Take care!
Gonzalo.
Buenos Aires, Argentina.
Glad you got it
First time i saw your videos sir, i thought this, "i wanna be there, i should be there," i didnt know your youtube channel but now i found, English is not my native language but i'll make it perfect so i can understand well your lessons. Thank you sir, for being a great professor.
:)
Hats of to you sir, for being a great ambassador of physics world wide.!
:)
I just feel very happy to see the excitement in his face everytime I watch his videos. A person with so much dedication and love for physics! Love you for sharing your love for physics! :)
I think you are a best physics teacher in this world. What a energy and knowledge you have. Salute to you sir.
It is the harmonium--the BALANCE which nature procures. No man may touch her, all man will ensure her!
Vaccine Man: "Who are you?"
Me: *Smiles*
Me: "Just a physicist for fun."
:)
I would loooooooove to hear from you daily sir, you are our inspiration
Love your videos, professor! Keep making them... Thank you
I did not expect that! Awesome.
You're something else, sir. Thank you for existing!
This vortex reminds me of black holes...maybe the lower bottle is another universe.
You made my day - indeed. Love your work Prof.
:)
Walter Lewin, I want your mind. You have truly made physics legendary and always relevant for us. Your reactions to a demonstration are enlightening. I wish I could think of each experiment the same way you do. We will always be friends and you will be the 26-100 godfather of physics.
:)
Hello from Croatia..
Thnx for all passion and love explaining physics. .
The most amazing thing was the whirlpool coming out there!
:)
LOOK AT IT! ARE YOU LOOKING AT IT!
sir you have changed my life, I loved physics earlier, and I found out about your videos and I am in love with the beauty of physics, I currently 15 and learning and having fun because of your videos :)
:)
The vortex on this one is much cooler. love you, Professor!
I am studying physics and I want to thank you for all your video lessons and other funny videos. Thank you so much for making learning entertaining.
what is difference between size and magnitude and value???
learn to use google.
Your answers are all there. Or try quora
definitely the best, again, thank you Sir Lewin
:)
I am amused by your amusement. Love your lectures and videos.
:)
Best vortex yet from nothing. But do that again and add something to reduce surface tension please.
:)
I have never seen this before, thank you for making this video; it has made my day.
I just love watching your video's. Not reacting alot but that shouldn't be a problem, I hope :)
It seems amazing what physics can do... even stopping a fluid to go through a hole!
Just wanted to give a bit of youtube advice after seeing this video. This video seems to have been 'edited' by 'improving' the quality of the video by RUclips.
My advice would be, please don't use that function as it moves steady objects around and stops moving objects to move. Which I think, physically would be impossible, but you may prove me wrong.
Best regards from the Netherlands,
Anton Draaisma
hartelijke groeten van de VS
Physics is amazing and you are amazing professor!
Always love to see you.
From Afghanistan.
And we are still friends.
:)
sir I am from India have just completed my class 12 and I am thinking for opting btech in mechanical engineering . I started watching your videos from yesterday night and have become a huge fan of yours . Sir your lectures are excellent will u kindly tell me sir whether ur videos will help me for btech
:)
amazing video sir👌
:)
Always loved your rings...
Glad you like them!
Professor, do you live in Netherlands now, or in the USA?
US
Great video professor! I really enjoy these videos!
sir, mathematician use the concept of infinitesimals often in calculus but 1= 0.999... ,then it means infinitesimals should not exist?
infinitesimals are the backbone of calculus.
Professor, your videos are awsome . Where do u teach?
he taught at MIT. Now he does, kind of. I mean he does post some problems but his lectures are watched constantly. So in a way he is still teaching, and will keep doing that after his death (benefits of a digital age + great instructor!)
Indeed, physics is fantastic!
I like your videos professor Walter Lewin
3:20 should be a meme, look at eeet!!
Great videos!! subscribed and hit the bell
Although its a fun video i would like to commend a probable explanation and plz correct me....I believe that the pressure gradient on the boundary of the water meniscus and the air on the lower bottle not be overcome the water surface tension and so it wont let the water pass through...:)
yes
not so much surface tension, but the water makes a seal at the neck of the bottles so the air in the system cannot pass thru.
this is how our professor enjoys his life
:)
Your explanation is awesome sir... Can you suggest me physics books at undergraduate nd PG LEVEL and schlorships for Masters IN PHYSICS...... AWESOME explanation....
:)
Sir but I also need books so please suggest me books...
any college physics book will do for undergraduates as a start.
use the web
No it's amazing
Yeah Physics is amazing awsm cooollllllll
:)
Sir, this may be a personal question but I just wanted to know, how were you in mathematics in your academic life?
Is this something that came naturally to you?
hard work and above all discipline!
What advice can you give to students like me who are trying to understand and love physics but often get tangled in its imagination.....( as I am writing this, it reminds me of the times when you said to me that these lectures are a bit more for me and that these lectures were given in MIT.....)
I really love physics and I love seeing it in action.....(I recently saw a video on internet where they showed water drops floating on water without being coalescing into it......and then when I saw it happening at my home, I quickly made a video of it in slow-motion and when I saw it and the physics, it gave me so much joy.......and it reminded me of YOU and your CHANNEL's name- "Lectures by Walter Lewin. They will make you ♥ Physics"........
It's very hard Yash to give people advice as they have so very different backgrounds, different natures, different disciplines, different passion, different ambitions.
You have a problem that you often dig your heels in on an issue that is unrelated to the big picture and you won't let go till I write :this is my last msg on this topic".
ONLY 1 example.
launch a 1/8" ball bearing from the surface of the Earth to make it escape the Earth gravity. That speed can be calculated taking the air drag into account. It's NOT an easy problem as the air density is a strong function of altitude. But it can be done. Now take a 1/8" feather, or take a tree and launch if rom the Earth surface to make it escape Earth gravity. The answers are WILDLY different from the one for the ball bearing and the feather would simply NEVER make it regardless of what speed you gave it.
You wouldn't let go. That means you got hung up on details as the basic concept of escape velocity is way more important then to do it from below the atmosphere. The Moon has no atmosphere and if a planet has one then the escape vel holds as long as you are outside the atmosphere.
>>>>>I really love physics and I love seeing it in action.....(I recently saw a video on internet where they showed water drops floating on water without being coalescing into it.>>>>>
I usually try hone at one point because I like to question each and everything that you say in your lecture because I know you are a good teacher and so I don't want to misinterpret any of the things that you say and that makes me into smaller and smaller things even if it does not relate to the big picture......
for example when I asked you about why we ignored atmospheric pressure in case of escape velocity then FIRSTLY, it was sheer out of my curiousness because I wanted to know why we ignored it and not just listen to it as a speech and then move onto the next line......and SECONDLY, since we earlier studied in Lect-12 about air drag so I was curious why we couldn't use it.........
P.S. for the video that I mentioned about water drops, they said that it happens for only special frequencies of water in which case the water droplet falls on a trough of the water wave and the trough provides the cushion action to let the water droplet hold its shape......
Ha! I love vortices too...
so beautiful
One little tipp for your next video: Turn off the RUclips Video stabilisation. It makes the Video shake when you move and distorts it.
i think thats due to surface tension
sir, do I have to learn chemistry to become a theoretical physicist?
ofc
sir, Is undergraduate level chemistry is enough for a theoretical physics student?
probably
It is fantastuc!
If I met you earlier, my life would be alot diferent.
You are the best man alive. Glad to share the same world with you :D
:)
¡Qué hermosa es la física, bendito sea, querido profesor!
:)
Sir, I love it.
:)
To those who love getting people to think: cheers!
:)
Lectures by Walter Lewin. They will make you ♥ Physics. One question: was it Maxwell or Michelson-Morley who determined light in vacuum was c for all observers?
That's so cool!
Sir i would like to contact you personally to discuss a theory with you. sir please reply by telling me how can i contact you.
he can ask me questions only here
my email, my phone and my address are strictly private. No exceptions.
Lectures by Walter Lewin. They will make you ♥ Physics. Sir I am not a hoax, sir I think this could be something good. please
my email, my phone and my address are strictly private. No exceptions. Please respect that.
Sir, I propose that if two black holes of equal mass interact with each other then they can accelerate particles through their point of contact.
Sir, this is just a brief idea about the theory. I just wanted to know if this is an absurd idea or a great idea.
Please reply as soon as possible.
sir,then equality 1=0.999... kills the concept of infinitesimal.
wake up, 1 is not 0.999
Physics is Amazing...
Great video, professor! (:
:)
Physics is fantastic...
yup
Lectures by Walter Lewin. They will make you ♥ Physics. An unrelated question. From what I remember, gravity waves and light waves have the same velocity. Does it mean their intensity decreases at the same rate?
Hello professor! I just love u.. wanna meet one day pls ..love from India❤
Maybe one day!
@@lecturesbywalterlewin.they9259 I desperately wanted to meet u professor! ❤
yes, physics is amazing.
I really love physics but can't go to its umiversity
:)
What that is insane how is that happening the laws of gravity should make the water fall down
See you tomorrow Walter!
I have a physics ? for you why does the old billiard balls not carom the way new billiards balls do. you can't use Willie hoppe formula for carom shots
ask google
Like you
Hello walter lewin I really like you and your physique :D
:)
Sir now I m in class 10 and I loved your video to much ❤️
Do you have any email prof Welter Lewin 😍cuz I have got something to ask.
my email is strictly private