 Hi, I'm Zor. Welcome to Unisor Education. This is the first introductory lecture of the new course, which is called Physics for Teens. This course immediately follows my previous course, which is called Mathematics for Teens or Maths for Teens, which has just been completed and all the exams were implemented and embedded into the Unisor.com website. Now, I do encourage you to use this website, Unisor.com, not only to go and listen to every lecture, because every lecture is also accompanied by very detailed notes and there are some exams on the website. Everything is completely free, so I do encourage you to use the website even if you have found this particular lecture or any other lecture on YouTube. Still, I would suggest you to go to Unisor.com, because the YouTube lecture is just linked into the website and the website is much richer. So, anyway, going back to physics, I'm planning to cover the elementary physics as it existed before theory of relativity and quantum mechanics were introduced into the physics of 20th century. So, basically, it's level of new-tone and whatever follows him, but before the contemporary branches of physics. So, elementary physics. Now, I will try to cover as much theory as possible. So, this is a course of, well, I should say, theoretical physics, but not on the contemporary level of theoretical physics, because it requires a lot of mathematical knowledge. But within the framework of the math which has been covered in the previous course of mine, which is Maths for Teens, especially the calculus section. So, within the framework of that calculus section of this course, I will present the theory behind the elementary physics. So, that's my plan. Now, most likely I will present the laws of physics not only on a qualitative kind of explanatory basis, but also based on math. Basically, I will just give the equations, maybe differential equations, maybe something else, but in any case, it will be based on a really theory behind the laws and not as much on experiments. I, well, considering confines of this internet-based classroom, I will not be conducting any real experiments to demonstrate certain concepts of physics, but I will definitely talk about them and, well, don't forget that Einstein has basically came up with his theory of relativities using only logic and mental experiments, not the physical, not the real physical experiments. And also another story, the planet Pluto, for instance, well, they don't call it planet anymore, but anyway, Pluto was discovered basically through calculations. Nobody actually found it through the telescope. It's the other way around. The mathematician basically calculated where it's supposed to be and then told astronomers to look into this point and indeed they have found the Pluto. So, what I would like to emphasize the theoretical foundation of this course rather than experimental. So, what else is important? I will use as a textbook, quite a famous textbook which I have learned my physics at the time, written by a very famous Russian professor by the name Landsberg. It's called the Textbook on Elementary Physics. It's in three volumes, very big one. But anyway, it covers pretty much everything related to elementary physics. Maybe on a little bit more detail and more theoretical level than people would prefer nowadays. But anyway, I will probably decide which part I can really miss if it's really too deep. But in any case, that would be my main source of information. I will also use lectures by Richard Feynman, which were in California when he was at Stanford, I think. I think at Stanford University. And some other sources of information. But anyway, I would suggest actually the textbook of Landsberg as the most important part. But you don't really need this particular book because I'm going to explain everything whatever is in that textbook in my own words, with my own comments. I will just use the textbook as a guide basically for myself to present information to you. And then there is a list of sections which I would like to cover here. It's mechanics, energy, electricity, magnetism, waves, optics and atoms. It's a very big job actually to present all these in a relatively concise form and it will probably take me a few years. Now this is my first lecture of the course, which means the course will develop as we speak basically as I'm ready with one lecture after another. So this is the work in progress. At the moment of my saying whatever these words I'm saying the first time, this is the first lecture basically. There are no others. But obviously as the time goes I'm planning to add lectures, maybe a couple of lectures a week or something like this. It will probably take a couple of years at least. So anyway, welcome to Physics for Teens. My name is Zor and I encourage you to use Unizor.com website. It has the topics on the left and one of the topics is Physics for Teens. Make sure that everything in the previous course, which is Math for Teens, you are really familiar with primarily the calculus because the calculus is the language of physics. So thanks very much and good luck.