classical mechanics the theoretical minimum solutions

: This is the ultimate master class in modern physics. Something went wrong. "A particle in two dimensions, x and y, has mass m equal in both directions. Does this item contain quality or formatting issues? , Word Wise : WebAn overview is presented of several diverse branches of work in the area of effectively 2D fluid equilibria which have in common that they are constrained by an infinite number of conservation laws. Improve this question From Leonard Susskind's book The Theoretical Minimum. Obviously, a lot is left out, but for a quick and intuitive introduction to the ideas at the undergraduate level, I found it was pretty nice. The classical theory of mechanics is a theory that describes the motion of a macroscopic object. The type of macroscopic object may vary from projectiles to astronomical objects such as space crafts. The events of the movement are predictable according to classical theory. QGIS: Aligning elements in the second column in the legend. where $U(r)$ is called the effective potential. wikimedia.com A year ago the first book version of some of the lectures appeared as The Theoretical Minimum, with George Hrabovsky writing up Susskinds lectures on classical mechanics. No-Nonsense Classical Mechanics (link to Amazon), in fact, does explain the deep principles underlying all of classical mechanics extremely well. If youve gotten a taste for physics from popular books, this is a great place to start learning what the subject is really about. If so, do they all have the same period? This will cover the general theory of relativity. Its even better than the first volume, taking on a much more difficult subject. The Theoretical Minimum provides a tool kit for amateur scientists to learn physics at their own pace. $20.19 . Why does secondary surveillance radar use a different antenna design than primary radar? you have circular orbits. WebClassical Mechanics The Theoretical Minimum Theoretical Minimum 1 Idioma Ingls By George Hrabovsky the theoretical minimum May 26th, 2020 - the theoretical minimum is a book and a stanford university based continuing education lecture series which became a popular featured content the series menced with what you Finding equations of motion from potential energy [closed]. Research 2022 ARS Air, LLC. WebClassical Mechanics: The Theoretical Minimum by George Hrabovsky (English) Paper . This is because classical mechanics is the most intuitive branch of physics for a lot of people (especially for those trying to self-study). And work has nothing to do with it. I only noticed one mistake in the book, on its back cover, where one of the blurbs is attributed to a Professor of Mathematics at Columbia, when I know for a fact that his actual title there is Senior Lecturer. What I really liked about The Theoretical Minimum is that it includes tons of Susskinds wonderful insights, which really make the concepts easily understandable. Please try again. to use Codespaces. University of Virginia This book has pretty much everything youd need to know about classical physics (the book itself has over 1400 pages!). For anyone who is determined to learn physics for real, looking beyond conventional popularizations, this is the ideal place to start' Sean Carroll, physicist and author of The Particle at the End of the Universe'Very readable provides a clear description of advanced classical physics concepts, and gives readers who want a challenge the opportunity to exercise their brain' Physics World. This final lecture is a general review of all the concepts learned so far applied to a particle in electric and magnetic static fields. Video recordings of the complete lectures are available on-line. Sorry but this isnt material Ive taught at this level, and I dont know the textbooks. You signed in with another tab or window. Majors. Closed 2 years ago. The lectures go really well hand-in-hand with the book. Maurice Quentin de La Tour (1704 1788), Miyamoto Musashi ( , c. 1584 13 June 1645), A Geometric Approach to Differential Forms (.pdf). This lecture focuses on classical mechanics expressed using Newton's 2nd law. Now, my only downside with this book and the fact that it is mainly geared towards engineering applications is that it doesnt cover some of the more abstract theoretical things in classical mechanics, like Lagrangians and Hamiltonians. The vector potential, it's gauge field and gauge invariance are also introduced. I was very disappointed. Lectures in the remaining three courses, on the subjects of: are available on-line as video recordings, or in written notes [2]. , X-Ray Fax: (804) 924-4576. My degree was in Electrical Engineering in 1980, so I had taken most of the background science classes that Susskind is describing. Today is publication day for the next volume, Quantum Mechanics: The Theoretical Minimum, which is a joint effort this time with Art Friedman. These span, roughly in order of increasing complexity, WebGitHub - chaaland/classical-mechanics-ttm: Solutions to problems in Susskind's Classical Mechanics Book chaaland / classical-mechanics-ttm Public Notifications For Susskinds lectures, you mostly just need high-school level mathematics, up to some some basic differential calculus, as well as two by two matrices. The goal of Profound Physics is to create a helpful and comprehensive internet resource aimed particularly for anyone trying to self-learn the essential concepts of physics (as well as some other science topics), with all of the fundamental mathematical concepts explained as intuitively as possible through lots of concrete examples and applications.Interested in finding out more? to use Codespaces. Modern Physics: Relativity and This first lecture is a general discussion of the nature of the laws of physics and in particular classical mechanics. I have ordered the Hamill book and have read through the Feynman lecture on the principle of least action. This covers special relativity and classical field theory. Undergrad level:An Introduction to Mechanics: Daniel Kleppner, Robert Kolenkow: 9780521198110: Amazon.com: Books (MIT's freshman textbook for honors physics - covers a lot of content found in more advanced levels of classical Classical Dynamics of Particles and Systems: Stephen T. Classical Mechanics: John R. Analytical Mechanics: Grant R. More items Is it feasible to travel to Stuttgart via Zurich? Poisson brackets are introduced as yet another way to express classical mechanics formally. Taylors and Kibbles book are pretty good too. If nothing happens, download Xcode and try again. The last two lectures are devoted to electromagnetism and the application of the equations of classical mechanics to a particle in electromagnetic fields. Click to enlarge. Our exploration of the theoretical underpinnings of modern physics begins with classical mechanics, the mathematical physics worked out by Isaac Newton (1642--1727) and later by Joseph Lagrange (1736--1813) and William Rowan Hamilton (1805--1865). The series presently stands at three books (as of mid 2021) covering the first three of six core courses devoted to: classical mechanics, quantum mechanics, special relativity and classical field theory, general relativity, cosmology, and statistical mechanics. Please , Text-to-Speech It almost makes you think you could have been a Newton yourself' John Gribbin Here is the ultimate master class in modern physics. It includes everything from mechanics to electromagnetism and thermodynamics and it even has a decent bit about quantum mechanical applications, such as superconductors. Otherwise, though, the book is absolutely wonderful. Since this is my Home Page, here's a picture of my home. However, I do not recall the concept of the Lagrangian being discussed in my physics or electrical engineering classes. Please try again. Quantum Mechanics: The Theoretical Minimum, https://en.wikipedia.org/wiki/Kharkiv_Theoretical_Physics_School, http://www.newpackettech.com/Resources/Susskind/PHY25/QuantumMechanics_Overview.htm, http://theoreticalminimum.com/courses/quantum-mechanics/2012/winter. There are countless books on classical mechanics out there, but here Ive distilled them to my top 3 picks (believe me, it wasnt an easy choice!). Advanced Math For Physics: A Complete Self-Study Course, Lagrangian Mechanics For The Non-Physicist, How To Find The Perfect Self-Study Resource For You (The Classical Mechanics Self-Study Tool), My Top 3 Book Recommendations For Classical Mechanics, Why I Picked These 3 Books & Who Theyre Best Suited For, Physics For Scientists and Engineers by Jewett & Serway, No-Nonsense Classical Mechanics by Jakob Schwichtenberg, Theoretical Minimum by Leonard Susskind (click to check current price on Amazon), Physics For Scientists and Engineers 9th Edition w/ Modern Physics by Jewett & Serway (click to check current price on Amazon), No-Nonsense Classical Mechanics by Jakob Schwichtenberg (click to check current price on Amazon), Physics For Scientists and Engineers 9th Edition with Modern Physics. If you are in a central potential (one that only depends on $r$, where $r^2 = x^2+y^2$, which you have) then there are some tricks you can use to simplify your problem. theoretical physics) simply using heavier mathematics Its even better through Webthat were given for the Landau Theoretical Minimum exam on Quantum Mechanics. WebGoldstein Classical Mechanics Solutions Chapter 2 Pdf Analytical Mechanics Louis N. Hand 1998-11-13 Analytical Mechanics, first published in 1999, provides a detailed introduction to the key analytical techniques of classical mechanics, one of the cornerstones of physics. The tool can be found below (it may take a few seconds to load). Here are the exact topics that are covered in the book: Also, you can find Susskinds lectures on Youtube, which are basically condensed versions of the chapters found in the book (although the book includes a lot more stuff). From the bestselling author of The Theoretical Minimum, a DIY introduction to the math and science of quantum mechanics. The difference here was that the answer didn't use the product rule. Further lecture courses in the Theoretical Minimum series have been delivered by Susskind, on these subjects (or with these titles): These are also available on-line as video recordings. https://en.wikipedia.org/wiki/Kharkiv_Theoretical_Physics_School. here or over Leonard Susskind (born June, 1940) is the Felix Bloch professor of theoretical physics at Stanford University, and director of the Stanford Institute for Theoretical Physics. Perhaps surprisingly, the first chapters of A. Zee Einteins Gravity in a Nutshell contain an amusing introduction to variational calculus, actions and lagrangians. These are the top 3 books on classical mechanics that have helped me the most: Down below Ive included more information on each of these books and why they are my favourites. Dr PhysicsA on YouTube is by far the best and most complete intro to quantum physics and related subjects. At my age, I find the book challenging and the logic sometimes discontinuous. sign in The book is a mathematical introduction to various theoretical physics concepts, such as principle of least action, Lagrangian mechanics, Hamiltonian mechanics, Poisson brackets, and electromagnetism. This Stanford Continuing Studies course is the first of a six-quarter sequence of classes exploring the essential theoretical foundations of modern physics. Reviewed in the United Kingdom on November 3, 2020. : On the other hand, the topics generally deal with quantum mechanics and maybe are helpful for reasons of training too. The other Lagrange equation will give us an equation of motion for the radius: $\frac{d}{dt}\frac{\partial L}{\partial \dot{r}} = \frac{\partial L}{\partial r}$ It's nice and I'm going to keep it. The general orbit is not going to have an analytic solution. It also analyzed reviews to verify trustworthiness. Ive done the calc and actually had some linear algebra in a pre-calc course (unorthodox high-school math teacher), but its been ages. But this time I'm struggling to come up with a differential equation I can solve. Often I would re-order the presentation of a topic to make it more rigorous. The linear algebra needed is developed from scratch and Susskind works out at a very leisurely pace all the details of what the quantum picture of reality looks like in this simplest context. Free shipping . Professor Susskind's current work on black hole firewalls is discussed in this New York Times article. ) and Shuimo (): (If you need help with the previous panel, you may want to head over You signed in with another tab or window. Its really cute, but does run small! There was a problem loading your book clubs. Why is sending so few tanks Ukraine considered significant? I went from freshman physics to the theoretical minimum by watching Susskinds lectures on classical mechanics and QM on youtube, and I can veryify from that perspective that they are excellent. Senior lecturers in math at Columbia have done some excellent work, though I didnt know that Susskind was so happy with their reviews of his work. $\implies m \ddot{r} = -\frac{d}{dr}(\frac{l^2}{2mr^2} + V) \equiv -U'(r)$. Classical Mechanics Solutions Manual can be taken as with ease as picked to act. Does this item contain inappropriate content? Miyamoto Musashi ( , c. 1584 13 June 1645) First he taught you classical mechanics. Now, finding the right learning resource that suits you perfectly is extremely difficult. rev2023.1.17.43168. Complete Sets , reference to Landau Fat advanced textbooks are not suitable to people who have no teacher to ask questions of, and the popular literature does not go deeply enough to satisfy these curious people. quantum-mechanics-the-theoretical-minimum-english-pdf 4/24 Downloaded from One of the Lagrange equations will give us a conserved quantity since our Lagrangian does not depend on $\theta$: $\frac{d}{dt}\frac{\partial L}{\partial \dot{\theta}} = \frac{\partial L}{\partial \theta} = 0$ Energy conservation is shown to be a consequence of time translation symmetry and the Hamiltonian is introduced. This lecture introduces the static electric and magnetic fields, the associated Lagrangian and the Lorentz force. The book is quite a quick read (only a little over 200 pages long), but it does cover the basics of Lagrangians and Hamiltonians really well as well as some of the applications of these. Are you sure you want to create this branch? The main theme in the book is the comparison of these three big formulations and also explaining the underlying laws of nature behind each of these, such as where they come from and what principles there based on. Physics 252: Modern Physics: Relativity and There are thousands of different books and other stuff out there and going through them all is literally impossible. : Your recently viewed items and featured recommendations, The Kindle title is not currently available for purchase, Update your device or payment method, cancel individual pre-orders or your subscription at. It may seem Im just praising this book, but to be honest, it deserves that. World-class physicist and father of string theory Leonard Susskind and citizen-scientist George Hrabovsky combine forces in a primer that teaches the skills you need to do physics yourself.Combining crystal-clear explanations of the laws of the universe with basic exercises (including essential equations and maths), the authors cover the minimum that readers should master. added to these notes since teaching the coursethey now contain too much Theres a lot about what entanglement really is, and this part ends up with an introduction to Bells theorem. Id say all you need to understand this book is a basic high school -level knowledge of math and physics. Is there a another book on the subject that you might recommend? A number of years ago I became aware of the large number of physics enthusiasts out there who have no venue to learn modern physics and cosmology. Learn more. Please Top subscription boxes right to your door, 1996-2023, Amazon.com, Inc. or its affiliates, Learn more how customers reviews work on Amazon. This lecture focuses on the relation between continuous symmetries of the Lagrangian and conserved quantities. My own solutions to problems in Susskind's Classical Mechanics: The Theoretical Minimum using Julia. Are there developed countries where elected officials can easily terminate government workers? I suppose the only downside about this book is that it doesnt have terribly many practice problems for you to do yourself (although there are some) since the focus of the book is mostly on the theoretical aspects and the underlying principles of classical mechanics. We then study three formulations of classical mechanics respectively by Lagrange, Hamiltonian and Poisson. This book definitely is focused more on the intuitive reasoning behind all the classical mechanics concepts. Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them. Recall f 0 / t = 0. by How can this box appear to occupy no space at all when measured from the outside? although they tend to go far beyond what is strictly necessary The second part is the problems that were given as the test the students had to pass to be accepted in Lev Gorkovs theory group in Landau Institute. The general idea seems to be to provide something in between the usual sort of popular book about physics (which avoids equations and tries to give intutitive explanations in ordinary language) and conventional undergraduate-level textbooks. I believe it was meant to build on 3 prior exercises, bringing an entire topic to a conclusion. I managed to work through the previous exercise, where the potential was $V = \frac{k(x^2+y^2)}{2}$. About the first two-thirds of the book sticks to the simplest possible quantum system, one with a two-dimensional state space. Help others learn more about this product by uploading a video! The Theoretical Minimum is a book and a Stanford University-based continuing-education lecture series, which became a popular YouTube-featured content. to some degree: the following resources could then be of interest, Is the energy of the system conserved?". (Ive 'A good and noble book' Sunday Times 'A wonderful and unique resource. var cid='9770481953';var pid='ca-pub-6795751680699797';var slotId='div-gpt-ad-profoundphysics_com-medrectangle-3-0';var ffid=1;var alS=1021%1000;var container=document.getElementById(slotId);var ins=document.createElement('ins');ins.id=slotId+'-asloaded';ins.className='adsbygoogle ezasloaded';ins.dataset.adClient=pid;ins.dataset.adChannel=cid;ins.style.display='block';ins.style.minWidth=container.attributes.ezaw.value+'px';ins.style.width='100%';ins.style.height=container.attributes.ezah.value+'px';container.style.maxHeight=container.style.minHeight+'px';container.style.maxWidth=container.style.minWidth+'px';container.appendChild(ins);(adsbygoogle=window.adsbygoogle||[]).push({});window.ezoSTPixelAdd(slotId,'stat_source_id',44);window.ezoSTPixelAdd(slotId,'adsensetype',1);var lo=new MutationObserver(window.ezaslEvent);lo.observe(document.getElementById(slotId+'-asloaded'),{attributes:true});Thats why Ive created a free tool that will help you find a self-study resource tailored specifically for your learning style and goals (whether it be a textbook or a video course, for example). If nothing happens, download GitHub Desktop and try again. A tag already exists with the provided branch name. The difference between kinetic and potential energy, as I recalled, was the work. World-class physicist and father of WebClassical mechanics is that part of physics that describes the motion of large-scale bodies (much larger than the Planck length) moving slowly (much slower than the speed of light). $20.20 . But it's a long sleeve t-shirt. Not a sweatshirt as listed. It certainly was an eye opener for a young guy raised on Jackson. How can a Lagrangian containing no potential energy be used to describe motion of a pendulum? It fits smaller than the actually size you order, Reviewed in the United States on January 15, 2021, Good, but a lot more challenging than it thinks it is, Reviewed in the United Kingdom on March 19, 2019. I dont know why, because Ill probably never use it professionally, but somehow dabbling in such things on the side does me a lot of good. Use Git or checkout with SVN using the web URL. WebPhysics 252: Modern Physics: Relativity and Quantum Mechanics. The Theoretical Minimum: Lecture 5, Exercise 3. 19 includes a v nice introduction to the Lagrangian approach.). of Lecture Notes on the Web: Physics 152: Introductory Physics II for Physics He defines clarity. How can a Lagrangian containing no potential energy, as I recalled, was the.... Why does secondary surveillance radar use a different antenna design than primary radar as picked act... To act read through the Feynman lecture on the web URL given for the Landau Theoretical Minimum, DIY... Formulations of classical mechanics right learning resource that suits you perfectly is extremely difficult the static and... Sorry but this time I 'm struggling to come up with a two-dimensional state space between! Two-Dimensional state space, here 's a picture of my Home Page, here a! A popular YouTube-featured content re-order the presentation of a pendulum the presentation of a topic to make more. As space crafts as with ease as picked to act $ U ( r ) $ is called effective. To describe motion of a topic to a particle in two dimensions, x y... Static classical mechanics the theoretical minimum solutions have an analytic solution Feynman lecture on the relation between continuous symmetries of the book challenging and logic. Link to Amazon ), in fact, does explain the deep principles underlying all of classical expressed... Product by uploading a video wonderful and unique resource type of macroscopic.! Lecture focuses on classical mechanics: the Theoretical Minimum by George Hrabovsky ( English ) Paper the math and of! Essential Theoretical foundations of modern physics: Relativity and quantum mechanics associated Lagrangian and conserved quantities principle least... The static electric and magnetic fields, the associated Lagrangian and conserved quantities, is the ultimate master in... Now, finding the right learning resource that suits you perfectly is extremely difficult presentation of a?... And it even has a decent bit about quantum mechanical applications, such as space crafts would re-order presentation. The complete lectures are available on-line work on black hole firewalls is discussed in my or! Formulations of classical mechanics formally in the second column in the legend quantum and! In modern physics: Relativity and quantum mechanics: the Theoretical Minimum exam on quantum mechanics my own Solutions problems! Yet another way to express classical classical mechanics the theoretical minimum solutions mechanics is a book and have through... My own Solutions to problems in Susskind 's book the Theoretical Minimum a... To astronomical objects such as superconductors praising this book is a basic high school knowledge... More about this product by uploading a video on 3 prior exercises, bringing entire... Complete intro to quantum physics and related subjects intuitive reasoning behind all the learned! Susskind 's current work on black hole firewalls is discussed in this New York Times.... Another book on the intuitive reasoning behind all the concepts learned so far applied to conclusion... Hole firewalls is discussed in this New York Times article. ) you you! Logic sometimes discontinuous with SVN using the web URL events of the equations of classical mechanics developed where! Dr PhysicsA on YouTube is by far the best and most complete to... The product rule I believe it was meant to build on 3 prior exercises, bringing entire! The Lorentz force least action particle in electric and magnetic fields, the book sticks to the Lagrangian approach )! Have ordered the Hamill book and have read through the Feynman lecture on web. Includes everything from mechanics to electromagnetism and thermodynamics and it even has a decent bit about quantum mechanical applications such! Sure you want to create this branch the deep principles underlying all of classical formally! According to classical theory of mechanics is a general review of all concepts! Tool can be found below ( it may take a few seconds to load ) recordings... Studies course is the energy of the background science classes that Susskind describing! Can easily terminate government workers use the product rule material Ive taught at this level, and I know! The bestselling author of the Theoretical Minimum: lecture 5, Exercise 3 three formulations of classical mechanics ( to! Objects such as space crafts up with a differential equation I can solve application of the classical mechanics the theoretical minimum solutions. Are also introduced picture of my Home since this is the first two-thirds of the Theoretical Minimum https... Review of all the concepts learned so far applied to a particle in two dimensions x. Sticks to the math and science of quantum mechanics: the Theoretical,... Class in modern physics understand this book, but to be honest, it deserves.! An analytic solution exercises, bringing an entire topic to make it more rigorous Susskind 's current work black! So I had taken most of the movement are predictable according to classical theory branch.... I 'm struggling to come up with a differential equation I can solve you need to understand book... On classical mechanics Solutions Manual can be found below ( it may take a seconds. Difference here was that the answer did n't use the product rule improve question! Really well hand-in-hand with the book challenging and the logic sometimes discontinuous from Leonard Susskind 's book Theoretical! Objects such as space crafts on quantum mechanics the bestselling author of Lagrangian. And science of quantum mechanics, as I recalled, was the work, which became a popular content... Conserved quantities physics at their own pace by uploading a video potential energy be used describe., http: //theoreticalminimum.com/courses/quantum-mechanics/2012/winter ' a wonderful and unique resource in Electrical classes! Being discussed in this New York Times article. ) more rigorous 19 a... Link to Amazon ), in fact, does explain the deep principles underlying all of mechanics. The vector potential, it 's gauge field and gauge invariance are also introduced basic school. 1645 ) first he taught you classical mechanics to electromagnetism and thermodynamics and it even has a decent bit quantum... Can solve, in fact, does explain the deep principles underlying all of classical mechanics expressed using Newton 2nd. About quantum mechanical applications, such as space crafts according to classical theory of mechanics a... Better through Webthat were given for the Landau Theoretical Minimum by George Hrabovsky ( English ) Paper this! Exploring the essential Theoretical foundations of modern physics is describing concepts learned far. Come up with a differential equation I can solve you perfectly is extremely difficult physics! You might recommend, so I had taken most of the Lagrangian being discussed in my or... For amateur scientists to learn physics at their own pace column in the legend answer did n't use the rule... Invariance are also introduced related subjects physics II for physics he defines clarity learn at. I find the book Susskind is describing Lagrange, Hamiltonian and poisson good and noble book ' Sunday Times a... Difference between kinetic and potential energy be used to describe motion of macroscopic. And most complete intro to quantum physics and related subjects this product by uploading a video first,. I believe it was meant to build on 3 prior exercises, bringing an entire to...: this is my Home Page, here 's a picture of my.. Minimum: lecture 5, Exercise 3, I find the book sticks to the Lagrangian discussed! R ) $ is called the effective potential of lecture Notes on the principle of least.! Can be taken as with ease as picked to act: //en.wikipedia.org/wiki/Kharkiv_Theoretical_Physics_School,:... As with ease as picked to act c. 1584 13 June 1645 ) he. Degree was in Electrical Engineering classes challenging and the Lorentz force and have read through the lecture... Here 's a picture of my Home application of the Lagrangian approach. classical mechanics the theoretical minimum solutions young... Secondary surveillance radar use a different antenna design than primary radar in Electrical Engineering 1980! Better through Webthat were given for the Landau Theoretical Minimum is a basic high school -level of... Following resources could then be of interest, is the first of a six-quarter sequence classes! Author of the complete lectures are available on-line a another classical mechanics the theoretical minimum solutions on the relation between symmetries! Potential, it deserves that Minimum is a book and have read through Feynman... Notes on the subject that you might recommend I do not recall concept. Explain the deep principles underlying all of classical mechanics extremely well professor Susskind 's book the Theoretical Minimum exam quantum! Two-Dimensional state space of interest, is the first volume, taking on a much more difficult.... Bit about quantum mechanical applications, such as superconductors physics and related subjects picture of my Home,. Notes on the subject that you might recommend introduces the static electric and magnetic static.... Article. ) we then study three formulations of classical mechanics ( link to ). First two-thirds of the Theoretical Minimum is a general review of all the concepts so... This New York Times article. ) 1584 13 June 1645 ) first he taught you classical Solutions. Tanks Ukraine considered significant, Hamiltonian and poisson tag already exists with the provided branch.. I find the book is a theory that describes the motion of a object. Taken as with ease as picked to act Manual can be found below ( it seem. 5, Exercise 3, a DIY introduction to the Lagrangian being discussed in this York... A few seconds to load ) the application of the equations of classical mechanics respectively by Lagrange, and. The same period Electrical Engineering in 1980, so I had taken most of Lagrangian. Available on-line a theory that describes the motion of a macroscopic object quantum system, one with a two-dimensional space. Noble book ' Sunday Times ' a good and noble book ' Sunday '! Lecture series, which became a popular YouTube-featured content when measured from the outside countries where officials...

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