Motion Mountain - The Free Physics Textbook for Download Relativity Tutorial Galilean Relativity Relativity can be described using space-time diagrams. Contrary to popular opinion, Einstein did not invent relativity. Galileo preceded him. Note the curved worldline above. Now it is still moving in its final state. Straight worldlines (unaccelerated particles) remain straight in this process. But Galilean transformations do not preserve velocity. Special Relativity But 200 years after Newton the theory of electromagnetism was developed into Maxwell's equations. Because the speed of light is special, space-time diagrams are often drawn in units of seconds and light-seconds, or years and light-years, so a unit slope [45 degree angle] corresponds to the speed of light. Thus in the situation shown in 3 space-time diagrams below, the central section shows the worldline of one stationary observer, one observer moving to the right, and two events on the future light cone on the event where the two observers' worldlines cross. However, this DOES NOT happen. Radar
Physics-online.com for A-level, AS-level and GCSE Physics | Physics-online.com Rader's NUMBERNUT.COM Quantum Entanglement and Information First published Mon Aug 13, 2001; substantive revision Thu Aug 26, 2010 Quantum entanglement is a physical resource, like energy, associated with the peculiar nonclassical correlations that are possible between separated quantum systems. Entanglement can be measured, transformed, and purified. A pair of quantum systems in an entangled state can be used as a quantum information channel to perform computational and cryptographic tasks that are impossible for classical systems. The general study of the information-processing capabilities of quantum systems is the subject of quantum information theory. 1. In 1935 and 1936, Schrödinger published a two-part article in the Proceedings of the Cambridge Philosophical Society in which he discussed and extended a remarkable argument by Einstein, Podolsky, and Rosen. It should not be supposed that Einstein's definition of a complete theory included the requirement that it be deterministic. He added (Schrödinger, 1935; p. 555): 2. 3. 4.
Physics Physics 210: General Physics I Einstein for Everyone Einstein for Everyone Nullarbor Press 2007revisions 2008, 2010, 2011, 2012, 2013 Copyright 2007, 2008, 2010, 2011, 2012, 2013 John D. All Rights Reserved John D. An advanced sequel is planned in this series:Einstein for Almost Everyone 2 4 6 8 9 7 5 3 1 ePrinted in the United States of America no trees were harmed web*bookTM This book is a continuing work in progress. January 1, 2015. Preface For over a decade I have taught an introductory, undergraduate class, "Einstein for Everyone," at the University of Pittsburgh to anyone interested enough to walk through door. With each new offering of the course, I had the chance to find out what content worked and which of my ever so clever pedagogical inventions were failures. At the same time, my lecture notes have evolved. Its content reflects the fact that my interest lies in history and philosophy of science and that I teach in a Department of History and Philosophy of Science. This text owes a lot to many. i i i
Physics 20b: Introduction to Cosmology - Spring 2010 - Download free content from UC Irvine Weierstrass functions Weierstrass functions are famous for being continuous everywhere, but differentiable "nowhere". Here is an example of one: It is not hard to show that this series converges for all x. In fact, it is absolutely convergent. Here's a graph of the function. You can see it's pretty bumpy. Below is an animation, zooming into the graph at x=1. Wikipedia and MathWorld both have informative entries on Weierstrass functions. back to Dr.
Nuclear Weapons - basic technology concepts [UNC] A few words about nuclear weapons technology.. Fission weapons Nuclear weapons exploit two principle physical, or more specifically nuclear, properties of certain substances: fission and fusion. Fission is possible in a number of heavy elements, but in weapons it is principally confined to what is termed slow neutron fission in just two particular isotopes: 235U and 239Pu. These are termed fissile, and are the source of energy in atomic weapons. An explosive chain reaction can be started with relatively slight energy input (so-called slow neutrons) in such material. Typical appearance of a thermonuclear weapon detonation -- from many miles away. *Special techniques were required to record the fleeting moments of a weapon's initial detonation.
Chemistry News, Videos, Reviews and Gossip - io9 Interesting — when I was in the Army, it was called CBR (chemical, biological, radioactive). I wonder why they changed the order and the initials? Pressure from Jay Leno? NBC was for Nuclear, Biological, Radiological. When were you in? I was in back in the late 70s. I remember atropine was one of the drugs that was used to treat the immediate effects of nerve gas exposure. And we're supposed to believe that our benevolent government has truly decided to destroy all our VX stockpiles. I dunno, we've got much more targeted, devastating methods of wiping ourselves off the planet these days. I was in in the 90's. The husband, Mr.
Quantum Physics made simple How to Read 300% Faster in 20 Minutes (Photo: Dustin Diaz) How much more could you get done if you completed all of your required reading in 1/3 or 1/5 the time? Increasing reading speed is a process of controlling fine motor movement—period. This post is a condensed overview of principles I taught to undergraduates at Princeton University in 1998 at a seminar called the “PX Project.” I have never seen the method fail. The PX Project The PX Project, a single 3-hour cognitive experiment, produced an average increase in reading speed of 386%. It was tested with speakers of five languages, and even dyslexics were conditioned to read technical material at more than 3,000 words-per-minute (wpm), or 10 pages per minute. If you understand several basic principles of the human visual system, you can eliminate inefficiencies and increase speed while improving retention. First, several definitions and distinctions specific to the reading process: You do not read in a straight line, but rather in a sequence of saccadic movements (jumps).