I am 15 years old and for years, I´ve been so interested in Physics, I am practically married to it. I know it is really hard, and I´ve had tough times understanding some subjects; but through videos, books, and online lessons I am understanding more and more everyday so I can understand the subjects better at college. My biggest dream is to understand the nature of Physics and everything to it to be able to work professionally at it! I try to study everyday and these videos help me out a lot. I write down what I learn and look at my own notes from time to time! This is so much fun! I wish I could be sitting in one of those classes right now! I love studying and learning!

@melontusk7358

4 жыл бұрын

Thanks, pal. I'm currently studying Physics in college right now, specifically Analytical Mechanics. I have also been watching video lectures and reading your comment is really inspirational. I wish you all the best of luck in your future endeavors.

@psychotic.hazard_5530

4 жыл бұрын

Chip Mahgilify I know! It is absolutely defying and I know what I’m getting myself into. But I’ll give all of my efforts and trying will not be bad! Thanks.

@psychotic.hazard_5530

4 жыл бұрын

Elon Mush Thank you so much. Same for you. I imagine all of the hard work, mental and physical effort, sometimes even stress that you may be going through. Physics is not something easy indeed, but we will get through it and pursue our dreams I believe in you. You chose one crazy but awesome thing to study!

@Code-ff3ir

4 жыл бұрын

Exodus Scientific any other playlists, online classes and books you would recommend?😀😃

@psychotic.hazard_5530

4 жыл бұрын

Code 123 If you want to get introduced into some basic Physics, you can try a course in Brilliant.org; they have free introductory quizzes and their prices for full courses are pretty good ! They also have Mechanics, Quantum Physics, Maths, Theory of Relativity, Logic, Calculus, etc.

wow it's incredibly generous of stanford to offer these to watch!! thank you sooo much!! bless you.

@strivin4

Жыл бұрын

God bless us, indeed.

When I first saw this video, I thought that the whole business of transitioning between states was a very simplistic and academic exercise. But when you get to the next quarter, Quantum Mechanics, physical objects can be in a superposition of multiple states, and this understanding turns out to be hugely useful. Lesson: Don't question Susskind :-D

@spectrumofreality

10 ай бұрын

Everything is a wave always there are no particles. Superposition is just the manifestation of this...

These video lectures should be required viewing for all Physics Teachers at all levels. I watched them when I was teaching Physics just to see if there were any pointers I could pick up to make my classes better. Now I just watch them for enjoyment.

I remember me watching this at high school barely understanding anything and now since i started studying phisics in my country im so glad I know so much of what he's talking about

@xelionizer

4 жыл бұрын

Especially when he starts talking about the derivatives regarding F=ma ;)

@anarchyxskamfull

3 ай бұрын

I love you 😘

Thank you so much for posting this, o Stanford! This is true science for all. What wonderful spirit! And also very many thanks to Chaz Shand for taking the trouble to put them in order.

Stanford lectures let me learn academic subjects while being stuck in Russia without any proper systemic education in existence. Thank you very much for recording and putting them, I wouldn't be able to learn certain things otherwise.

I just want to say that I am so grateful that these lecture series are made available. They are very very helpful.

I'm gonna listen and study all of 136 lectures by professor Suskind. This is the first step I take. I hope this wonderful journey will take me to whole new level of understanding physics.

@goldsidion3086

2 жыл бұрын

did you finish it?

@duckyoutube6318

Жыл бұрын

@@goldsidion3086 not likely I would compare the amount of views of this video to others later in the series and use that to estimate if this person continued to watch. If the 120th video has only 10% of views this one does i would say there is a 90% chance this person didnt continue the series.

This Guy needs a nobelprice for beeing one of the best teachers the world has ever Seen

thx for great and free lectures! Coming from computer engineering background you recognize state machines in the beginning of the video. Thats so awesome that science is interconnected. The more you learn about physics / chemisty / math / computer science the more you realize its fundamentaly the same laws and rules

@conjmcnal

2 жыл бұрын

Just seeing now and that's the first thing that hit me

I cannot thank you enough. I cannot afford an education at Stanford (or any other great university or even not so great university) and the knowledge I am learning from Stanford/Leonard Susskind is one of the greatest learning experiences of my life and hopefully I can take this knowledge and change the world for the better .... at the very least it will make my world change exponentially with every lesson here.... THANK YOU SO MUCH !!!!!

This has got to be one of the best lectures I have ever seen.

Perfect class . It goes deep into the soul of physics.

533,675 views for lecture 1, 37,220 views for lecture 9 which means about 7% make it through classical mechanics...

@sephirothjc

9 жыл бұрын

Hegeleze nobody said it was easy

@morganmckenzie1303

8 жыл бұрын

+Hegeleze That sounds like the correct drop out rate. How many students did you have in 101 that made it all the way to 400 levels? If i recall correctly EEs have about a 60-70% dropout rate. I'd hazard a guess its the same for any hard science. It's almost always the same reason too, they can't do the maths needed.

@DavidVonR

8 жыл бұрын

+Hegeleze I made it through classical and quantum mechanics. Forgot almost all of it.

@MrPoutsesMple

8 жыл бұрын

+Hegeleze Assuming people watch the videos in series rather in parallel.

@maxm.5802

8 жыл бұрын

+Hegeleze it could just mean alot of people rewatch the first lecture or two as a refresher

From 00:00 to 11:59 First he speaks about deterministic. He defined it in the following way: wherever you happen to be, you know exactly where to go next, so it's deterministic into the future. I.e. wherever you start, you know where you will be arbitrarily into the future and also you know where you were before. From 12:00 what kind of laws of physics do we not allow? Classical Mechanics forbids a system that has a deterministic from one direction and not from the other (e.g. possible from past to current but not from current to future). How do know if classical mechanics is allowable deterministic? Just check if each node has degree of income equal degree of outgoing. From 23:00 How much do you need of states to say what happen next? This brings us to continuous physics. Systems in classical mechanics are deterministic and reversible. Besides, systems could be infinite of chains of states or cycles. Conservation Law is just memory where we started. Information Conservation is the one that you never lose memory where you started. Information Conservation is perhaps the most fundamental law of basic classical physics. 32:42 1st order equation means it has only quantities of 1st deterministic with respect to time. 41:35 give a good example of Head and Tail. This video until this moment takes 1006472 views, so I expect that the second lecture would be half of this number of less? Why? I don't know but nature behave like exponential way. Let me check it now. EDIT: I just checked, it is 312134 views As I expected. I think the reason is people come to do the first step, but few who goes for the second step, and fewer who goes for the next step, etc.

@meowwwww6350

Жыл бұрын

You're a treasure

Wonderful that we have such a course free and available to all. Thanks to Leonard Susskind and Stanford. Hoping to refresh my ailing Physics knowledge!

All to need to remember is a). classical mechanics allow unique paths to past and future. b). Information about the system is memoized so that integrity can be maintained e.g conservation of energy, momentum etc c). We need infinite amount of information in order to predict with great precision through out the time.

@foundingtitan9759

Жыл бұрын

Can you tell all of susskind’s lectures which are available on youtube(about 193) are these bachelor level or above that,I have passed class 12 in India When can I watch these.

Currently 13 and studying this to learn how I could make possible jet engines and understand fully how motion works. Very helpful of Stanford to record these lessons.

I love these videos. Once you start watching it you can hardly stop, anything discovered is much greater than the time wasted on playing games or watching other junks.

@ksai7593

3 жыл бұрын

Sir are you still alive ? ( No offense just curious)

This was a great Lecture, Dr Susskind. Thank you very much, it was very enjoyable and valuable. Finally a guy who just talks plain old fashioned sense and knows how to weave that in with the conventional physics syllabus. Take note other teachers/lecturers: Always know how to move from the general to the specific, from the big picture to the smaller picture, AND NOT THE OTHER WAY AROUND!!! This lecture is a good example of that. Very well done and enjoyable.

This man is very intelligent, he puts it in simple terms, that even I can understand. I'm 18 and in high school, still at the time in my life where I never thought math would be interesting, but this is an exception to that rule.

Thank you for this!! I am spending this year studying alone to get into university and these lectures are great!

Combined with his book of the same title, these lecs are a gold mine.

Thank-you for this series! It's fantastic.

Great lecture, I love how you explained it in such a simplistic way.

Thank you Lenny and Stanford for all these lectures.

Highly recommended, Prof. Susskind explains things very clearly. Definitely a higher level physics course. I took engineering physics years ago but the more abstract concepts (e.g., the Lagrangian and Hamiltonian formulations) were never developed. If you dare take these, bone up on basic calculus chain rule, integration by parts, and partial differentiation. Next, quantum mechanics (shiver me timbers). Oh, I saw his book in the public library looks like a good read, The Cosmic Landscape.

Thanks prof. Susskind for sharing your studies.

Serve para o que eu estava procurando por curiosidade. Obrigada, Stanford e Leonard. ^^

How amazing it is to find physics lectures for free!!! I get to learn something new in my free times :)

@crazystemlady

Жыл бұрын

Happy learning to you! Im in university physics and hoping to get a better appreciate for physics for the standford biology and mathematics playlists were so inspiring! Not just the material but the little personal anecdotes made by the professors!

This Prof.is amazing. He actualy teaches you to understand things better and esier!!

His approach to CM is really unique and impressive.

Thank you Leonard. You renewed my interest in the nature of reality and the universe. And trying to get to the bottom of what this "thing" we're in even is. Thank you, thank you, thank you

@strivin4

Жыл бұрын

God’s creation really is bizarre.

Cool ! i'm Vietnamese - i can't go abroad to learn - so that it's usefull. It help me have more experiences. Thank you so much !

Susskind is the best at explaining. Period.

One of my favorite videos thank you for making this available sir.

thank you stanford for posting these lectures. God bless!

this is the best gift (internet) that humanity has got.

If I can attend even a single class from prof, I will experience heaven . Hope I can experience heaven in this life.

This guy rules. A true physicist,

Hey, this is not a bad place to start - with Leonard Susskind's lectures, but I have just finished - at nearly 30 years old - studying IGCSE's in Maths and Physics. I was worried that after well over a decade out of school that I would struggle, but that level - GCSE - is the perfect level to start and get the very basis of Classical physics. Also, the maths is just as important to understanding it all. Hope that helps.

interesting, never knew about that, now that I'm taking studying physics more seriously than before I realized that I knew so little before. ill still be studying more about this, ill watch all the videos and take notes

I'm currently 12, and I have always loved physics. When I saw lectures by Leonard Susskind, I jumped at the chance, since I'm reading a very interesting book by him. It's called "The Black Hole War" if anyone's interested. I highly recommend it.

"Leave Sauron to me!" - Leonard Susskind

Thanks so much for making these great resources open

The lecture gives a detailed understanding of the basic axioms of classical mechanics, why do we have two dimensions in phase space and that too position and velocity only. Very interesting and helpful for those who want a grasp in the field

@judy548

5 жыл бұрын

Sandeep Upadhyay e

I viewed one of Prof Susskind's lecture in which he stated that all physics depends on a change of energy. My hs physics teacher said the same thing way back. When I study physics now, I keep this in mind whenever we study any concept....

14:46 Susskind: "Why are they forbidden by the principles of classical mechanics?" Someone interrupts him and we never get to hear this question answered.

@md.omarfaruk89

3 жыл бұрын

Because the process loses information about future or past which is not acceptable.

@rukna3775

3 жыл бұрын

@@md.omarfaruk89 not about future, but the info about the past position

@nomachinesinthisroom

2 жыл бұрын

That frustrated me soo much!! He was on a roll...

Hate to say it, but these lectures are FAR, FAR better than the ones that I received at my uni. There, all my profs did were to throw a bunch of DiffyQ's, formulas and proofs on the board, and rarely ever explain, or LECTURE, as to what they meant or why they were useful. Despite the fact that I have a BS in Physics, watching Dr. Susskind's vids tells me just what I missed. What a great teacher will do for a subject, he's filling in so many holes in my knowledge...

I love this video. Have you considered teaching the number of observations needed with lines of psedocode, something like 'if state_n = a, state_n+1 = a', I find it easier to think of it that way instead of the arrow diagrams, but maybe that's just me.

"Conservation laws" seem to be based on determinism (classical mechanics), in that unless there is "random" in the system (could be either as each is free from strict causation) then the past (and future) must be predictable.

@jefflee4001

10 жыл бұрын

There are conservation laws in quantum mechanics as well.

@disregardingsanity2890

10 жыл бұрын

Determinism as he said works in a very finite measure of time and closed system so long as you're equally as precise. However, if you increase the time interval, then you have to proportionally increase degree of precision or errors go wildly out of control. He also mentioned that in the real world determinism would fall apart due to the aforementioned chaotic nature of...nature. That's where Brownian motion and Mandelbrot sets begin to become applicable. The term conservation simply means that any information (objects or events) aren't lost from initial to final measurements. Ergo, predictability is limited to precision of time, number of objects and their respective states.

Which textbook is used in this course? By the way, does someone know a course base on the book "University Physics" written by Jeff Sanny ? Thanks.

A simple point about predictability versus deterministic: In chaotic systems small uncertainties about the starting state amount to big differences between prediction and what actually happens quite fast, so that after a short time, predictions are not useful any more.

knowledge is something that should be seen as an opportunity it is so sad that many ppl have the opportunity to learn all they need just by looking everything up online but instead they waste their time on petty things and never try learning just for the fun of it.... back 100 or so years ago videos being free like this would be like finding gold

Wow, some of those concepts (especially during questioning) went completely over my head... Damn.

33:44 : Why is the force dependent on the position? From where do we make this assumption?

Thank you for uploading this content. It's great

This Prof. is amazing! He actualy teaches you to understand things better and esier. :D

man this is cool they decided to put these on the internet. That would be cool if Harvard put their physics lectures up.

Hi, I'm Carum Phull and I am going to take this lecture series. I have studied Science. I look forward to your wise words. Also, a big hello to Stanford, I love free learning :). Kind regards,

@SpeaksYourWord

Ай бұрын

Good luck. Are you going to follow some books with this?

Can anybody help me at 44:00? Why is he talking the second input and the output as the new couple of coordinates of the particle? Is it simply some rule he made up or does it have a particular meaning? Also, about the necessity of knowing only the coordinates of space and velocity: say a particle was moving at constant velocity in a straight line. How are we able to predict what the particle is doing now? It could get into a, say gravitational field, at a certain point, that changes its motion or it may never. How is it sufficient to know only the coordinates and the velocity?

The mass of the earth can be measured indirectly. There is an equation for g that involves the mass of the earth so the problem of determining the mass of the earth comes down to measuring G and g accurately.

I have a doubt at around 31:00. I didn't quite get the deterministic v/s predictability argument. What I could gather was that all classical systems are DETERMINISTIC. But due to our imperfection in knowledge about the system, we can't PREDICT the outcome and future and/or past states of the system (with absolute certainty). Is this what the light of the argument was about?

47:14 - end. Can someone elaborate on this? It is because position velocity and acceleration are all derivative: 1st and second order-->n order, that we need to add a another dimension in the phrase places to accumulate for the change in the order of derivative?

You can't see the damn power point slides in this class. This is good!

Great lecture, thanks for posting this.

The heads and tails part has a great bijection with binary functions The final law was just a xnor gate of sorts

This is kinda fun and not so hard so hard! Maybe I should be at Stanford 😅

@Secretname951

Жыл бұрын

Ok, it got harder when started talking about orders of the laws of physics and how that changes the dimensions of the phase space, I’ll need to spend a little time playing around with that…😂

There are a lot of interesting concepts just in this first lecture

In the universe with both heads and tails possible, if you had a way to measure the state of the universe and it only ever read heads, you might think your state space was the first universe (only heads). How can we know our universe doesn't have hidden state space that is either hard to access, or impossible?

This is great! 🙌🏽 Thank you very much.

Does any one has a download link or a torrent link for all the lectures?

The vacuum of space is rising the external kinetic energy of earth while in the system we are dragging our own potential energy down by having complexity to the system while at the force of which the vacuum expands is at which the planets want push back at the vacuum around but find no circuit for physical matter in thus finding reasoning for gravity itself.

Awesome! Glad I found this :)

Interesting , thanks prof. Susskind.

i love the lectures!!!

Does anybody have the transcription of all the lectures? It will be a real help. Thanks.

I once saw his book. It was awesome.

"Hyper-laws of physics which will tell us WHY the laws are what they are": mind-fucking-blown...

@elluciogm

8 жыл бұрын

+Henry Dickinson That's nice, but it's not science

@elluciogm

8 жыл бұрын

I like philosophy very much, and I think it's important, but it's someone's ideas, opposed to falsifiable facts.

@nacho74

6 жыл бұрын

elluciogm Philosophy is not only constituted of the ideas of some

the equation describes an energy mass duality, it is not a vector or in other words an equation that you can apply a variable of time in it to figure out it's direction, the equation may apply to all matter

Thanks for putting this up. Would love to study a physics degree but space-time...ahem...i mean, money-time continuum doesn't allow for this at the moment. It's a brilliant second best option being able to watch these videos!

@JiggyMcCue

5 жыл бұрын

@Jason R Stanton You can't even write correctly, you fucking moron.

Wonderful! Thank you!

Excellent presentation of compressed concepts

Thanks for sharing the lecture.

Wonderful teacher. Although I keep thinking about how Mr. Susskind has the face of George Carlin, and the voice of Christopher Walken. I will continue to watch the videos.

36:30 - if integrate 'a', then you get the velocity, possible?

Hello , I have a question . I am an electrical engineer , now I work in power transformer test when I make lnsulation resistance test between windings of transformer or between winding and body there are three type of current will appear 1- capacitance current 2- resistive current 3- dielectric apsorbtion current My question is what is dielectric apsorbtion current and the behaviour of insulation when this current pass through it ?

Nice lecture as an explanation of the need of the phase space and deterministic bases of classical mechanics. One can say that In classical electrodynamics when a charged particle moves with acceleration it radiates energy and semiclassical force is related to the first time derivative of acceleration. So from lecture arguments the phase space in that case should contain also acceleration ...

A million thanks!

very good explanation of classical mechanics which comparises mainly of nutonian mechanics i loved the vedio.

at 54:49, in that area you can change the point? what the did is they had TT and they put it to TH. Are you allowed to change that?

does anyone know where you can get the problem sets for this course? I found the midterm and final, but not the homework sets...Just trying to brush up..

Great lecture Prof. Thanks.

Thanks , Stanford University.

@sdv711 Is your confusion regarding why you can't differentiate the initial x coordinate to determine the velocity? If so, here's why: the ability to differentiate the x coordinate is contingent upon a continuous model of the x coordinate with respect to time. The problem here is that with no initial velocity, you can't build that model.

that's just there to make the people, who ask dumb questions, feel better about themselves. dumb questions are the ones that are asked without thinking about them enough.

Suppose that the rule to predict the next state requires complete knowledge of an infinite number of past states. Is this rule allowed by classical physics? (I assume not.)

this video was made the sam year i was born so i made for it, also the QM lectures give a more intuitive sense for the mathematics

I completely agree..this is like finding Salomon's Book of Wisdom