The History of the Universe in 200 Words or Less Quantum fluctuation. Inflation. Expansion. Strong nuclear interaction. Particle-antiparticle annihilation. Copyright 1996-1997 by Eric Schulman. This piece was the inspiration for the book A Briefer History of Time and led to the Annals of Improbable Research Universal History Translation Project. Interested in learning more about any of these events? Personal and Historical Perspectives of Hans Bethe - StumbleUpon Visible Proofs: Forensic Views of the Body: Galleries: Media: Autopsy WARNING: Some people may find images from actual postmortem dissections disturbing. Viewer discretion advised. Videos on this page require either QuickTime Player or Windows Media Player. Postmortem dissection, or autopsy, was among the first scientific methods to be used in the investigation of violent or suspicious death. Beginning an autopsy New York University Medical Center, The Forensic Autopsy (New York, 1978). View with QuickTime: Low Quality | High Quality View with Windows Media Player: Low Quality | High QualityRead the transcript Dissecting and analyzing the body parts University of Calgary and the Office of the Alberta Attorney General, Investigating Sudden Death, vol. 1(Alberta, Canada, 1978–80). View with QuickTime: Low Quality | High Quality View with Windows Media Player: Low Quality | High QualityRead the transcript
Einstein for Everyone Einstein for Everyone Nullarbor Press 2007revisions 2008, 2010, 2011, 2012, 2013 Copyright 2007, 2008, 2010, 2011, 2012, 2013 John D. Norton Published by Nullarbor Press, 500 Fifth Avenue, Pittsburgh, Pennsylvania 15260 with offices in Liberty Ave., Pittsburgh, Pennsylvania, 15222 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. This text owes a lot to many. i i i
The Past, Present, and Future of Data Storage As we approach the end of 2011 and look forward to another year, we pause to reflect on the long history of data storage. Mankind's ability to create, process, store, and recall information is light years ahead of the days of cave paintings and engravings on stone tablets. Vast amounts of information can be stored on drives smaller than your thumb, and data centers are cropping up at an increasingly high rate. What does the future of data storage hold? Embed this image on your site: Physics Flash Animations We have been increasingly using Flash animations for illustrating Physics content. This page provides access to those animations which may be of general interest. The animations will appear in a separate window. The animations are sorted by category, and the file size of each animation is included in the listing. In addition, I have prepared a small tutorial in using Flash to do Physics animations. LInks to versions of these animations in other languages, other links, and license information appear towards the bottom of this page. The Animations There are 99 animations listed below. Other Languages and Links These animations have been translated into Catalan, Spanish and Basque: En aquest enllaç podeu trobar la versió al català de les animacions Flash de Física. Many animations have been translated into Greek by Vangelis Koltsakis. Most animations have been translated into Hungarian by Sandor Nagy, Eötvös Loránd University.
Not-quite-so elementary, my dear electron Electrons in atoms behave like waves, and when researchers excite them to higher orbits, those waves can split up, revealing the constituent characteristics of the electron. In a feat of technical mastery, condensed-matter physicists have managed to detect the elusive third constituent of an electron — its 'orbiton'. The achievement could help to resolve a long-standing mystery about the origin of high-temperature superconductivity, and aid in the construction of quantum computers. Isolated electrons cannot be split into smaller components, earning them the designation of a fundamental particle. But in the 1980s, physicists predicted that electrons in a one-dimensional chain of atoms could be split into three quasiparticles: a ‘holon’ carrying the electron’s charge, a ‘spinon’ carrying its spin (an intrinsic quantum property related to magnetism) and an ‘orbiton’ carrying its orbital location1. In 1996, physicists split an electron into a holon and spinon2.
Fallacy List 1. FAULTY CAUSE: (post hoc ergo propter hoc) mistakes correlation or association for causation, by assuming that because one thing follows another it was caused by the other. example: A black cat crossed Babbs' path yesterday and, sure enough, she was involved in an automobile accident later that same afternoon. example: The introduction of sex education courses at the high school level has resulted in increased promiscuity among teens. A recent study revealed that the number of reported cases of STDs (sexually transmitted diseases) was significantly higher for high schools that offered courses in sex education than for high schools that did not. 2. SWEEPING GENERALIZATION: (dicto simpliciter) assumes that what is true of the whole will also be true of the part, or that what is true in most instances will be true in all instances. example: Muffin must be rich or have rich parents, because she belongs to ZXQ, and ZXQ is the richest sorority on campus. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13.
Quantum decision affects results of measurements taken earlier in time Quantum entanglement is a state where two particles have correlated properties: when you make a measurement on one, it constrains the outcome of the measurement on the second, even if the two particles are widely separated. It's also possible to entangle more than two particles, and even to spread out the entanglements over time, so that a system that was only partly entangled at the start is made fully entangled later on. This sequential process goes under the clunky name of "delayed-choice entanglement swapping." And, as described in a Nature Physics article by Xiao-song Ma et al., it has a rather counterintuitive consequence. You can take a measurement before the final entanglement takes place, but the measurement's results depend on whether or not you subsequently perform the entanglement. Delayed-choice entanglement swapping consists of the following steps. Two independent sources (labeled I and II) produce pairs photons such that their polarization states are entangled.
Motion Mountain - The Free Physics Textbook for Download