...Particles from the Universe 2.1 A Brief Introduction of Cosmic Ray The name of the cosmic ray came from the period when it was assumed as the electromagnetic radiation. Its components are mostly stable particles like protons, atomic nuclear or electrons. A fairly small proportion is stable antimatter. The diversity of the cosmic ray means the wide source of the cosmic ray. The source mat be the Sun or the distant universe through certain unknown mechanics. The cosmic ray can be divided into two types, the primary cosmic ray and the secondary ray. The primary cosmic ray is referred to as the cosmic ray generated from out of the solar system. These ray interact with the inter-planet matter and generate the secondary cosmic ray. Usually, among the cosmic rays that come into the atmosphere, about 90% is protons, 9% is the alpha particle while 1% is electrons. Gamma ray and the neutrino only takes a small occupation. 2.2 Aurora Aurora is the luminescence phenomenon that happens in the high latitude region when the charged high-energy particles in the cosmic ray collide with the air atoms and molecules in the upper...
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...Dark Matter Matt Cannon (928) Physics 222 2/15/02 Final Draft Dark Matter The ultimate destiny of our expanding universe depends on how much matter it contains and whether or not the amount of matter will be enough to one day stop the expansion. When astronomers add up all the visible matter (matter that emits or reflects light) in the universe, the result is that there is clearly not enough to stop the expansion of the universe. However, they have discovered over the past several decades that there may be additional matter hidden from view.1 This raises some important questions. What is this dark matter made of? How can it be detected? Astronomers first found substantial observational evidence of unseen matter in the early twentieth century when studying the galaxy M31.2 They discovered that the velocity curve for the outer limbs of the galaxy, which should drop off with increasing radius as mandated by Kepler's Laws and the Virial Theorem, leveled off at approximately 200 km/s. This observation was confirmed in the early 1970’s when radio astronomers found that hydrogen gas at the edge of galaxies moved with roughly the same velocity as hydrogen gas at the center of galaxies. If the visible matter seen in galaxies is the only source of mass then the observed uniform velocity of hydrogen gas is a direct violation of Kepler’s Laws and the conservation of angular momentum. Thus, the simplest explanation (which is usually the correct one) is that the visible matter in...
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...Astronomy 2B03: Lecture 2: What’s Out There? * Objects in the universe come in a hierarchy of scales and sizes: * Planets * Stars * Galaxies * The universe as a whole * These scales are so different from one step to the next that they are incredibly hard to comprehend all at once – no “everyday” experience to refer them to * If the Earth were a basketball how big would the moon be? Tennis ball * How many Earths would fit into the Sun? ~ 1 million * How many Jupiter’s would fit inside the Sun? 900 * How many Moons would fit inside the Earth? 50 * If we say the distance from here to Toronto (71 km) represents the distance between the Earth and the Sun, how far are we from Pluto? From Hamilton to Mexico, or from Hamilton to Calgary * If we say the distance from here to Toronto represents the distance between the Earth and the Sun, how far is the Earth from the Moon? From here to the edge of campus (Sterling and Forsyth) * If we say the distance from here to Toronto represents the distance between the Earth and the Sun, how big is the Earth? 3 meters * If we say the distance from here to Toronto represents the distance between the Earth and the Sun, how far is the Sun from the next nearest Star? 1/10th the distance from the Sun to Earth Lecture 3: The Earth: * Our starting point and only home * Both land and water * The only planet to have liquid water at its surface * Atmosphere: dense...
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...Sun THE SUNS ATMOSPHERE * the sun is so hot that it neither has a liquid or solid matter anywhere inside of it * moving down into the sun there is denser and hotter masses Photosphere (“sphere of light”) * The photosphere is the innermost of layer of the three layers that comprise the suns atmosphere * A gas layer of the sun that has the most visible light * It is about 400 km thick * Density of the photosphere is low by the earth standards about 0.01% as the air we breathe * Photosphere has a blackbody spectrum that corresponds to an average temp of 5800K * The photosphere appears darkest toward the edge or limb of the solar disk , a phenomenon called limb darkening, * This occurs b/c we see regions of different temp at different depths of the photosphere Granules * lightly colored convection features about 100 km in diameter seen constantly in the solar photosphere * time lapse photography shows that granules form, disappear then reform in cylces that last several minutes Chromosphere (“sphere of color”) * is a dim layer of less dense stellar gas that is above the photosphere * It is the layer we normally see * Astronomers can also study the chromosphere through filters that pass light with specific wavelengths strongly emitted by it – but not by the photosphere – or through telescope sensitive to nonvisble wavelengths that the chromosphere emits intensely Spicules - Are narrow jets of rising...
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...star begins as a very light dispensation of interstellar gases and dust particles over a distance of a few twelve lightyears. Although there is intensely low pressure existing between stars, this dispensation of gas exists instead of a real vacuum. If the density of gas becomes bigger than 0.1 particles per cubic centimeter, the interstellar gas grows uncertain. Any small alteration in density, and because it is impossible to have a perfectly even distribution in these clouds this is something that will naturally occur, and the area begins to contract. This happens because between about .1 and 1 particles per cubic centimeter, pressure gains an inverse relationship with density. This causes internal pressure to decrease with increasing density, which because of the higher external pressure, causes the density to continue to increase. This causes the gas in the interstellar medium to spontaneously collect into denser clouds. The denser clouds will contain molecular hydrogen (H2) and interstellar dust particles including carbon compounds, silicates, and small impure ice crystals. Also, within these clouds, there are 2 types of zones. There are H I zones, which contain neutral hydrogen and often have a temperature around 100 Kelvin (K), and there are H II zones, which contain ionized hydrogen and have a temperature around 10,000 K. The ionized hydrogen absorbs ultraviolet light from it is environment and retransmits it as visible and infrared light. These clouds, visible...
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...g Easier! Making Everythin ™ heory tring T S Learn: • The basic concepts of this controversial theory • How string theory builds on physics concepts • The different viewpoints in the field • String theory’s physical implications Andrew Zimmerman Jones Physics Guide, About.com with Daniel Robbins, PhD in Physics Get More and Do More at Dummies.com® Start with FREE Cheat Sheets Cheat Sheets include • Checklists • Charts • Common Instructions • And Other Good Stuff! To access the Cheat Sheet created specifically for this book, go to www.dummies.com/cheatsheet/stringtheory Get Smart at Dummies.com Dummies.com makes your life easier with 1,000s of answers on everything from removing wallpaper to using the latest version of Windows. Check out our • Videos • Illustrated Articles • Step-by-Step Instructions Plus, each month you can win valuable prizes by entering our Dummies.com sweepstakes. * Want a weekly dose of Dummies? Sign up for Newsletters on • Digital Photography • Microsoft Windows & Office • Personal Finance & Investing • Health & Wellness • Computing, iPods & Cell Phones • eBay • Internet • Food, Home & Garden Find out “HOW” at Dummies.com *Sweepstakes not currently available in all countries; visit Dummies.com for official rules. String Theory FOR DUMmIES ‰ by Andrew Zimmerman Jones with Daniel Robbins, PhD in Physics String Theory For Dummies® Published by Wiley Publishing, Inc. 111 River St. Hoboken, NJ 07030-5774 www...
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...Steven Weinberg: “Against Philosophy” (from “Dreams of a Final Theory”). Physicists get so much help from subjective and often vague aesthetic judgments that it might be expected that we would be helped also by philosophy, out of which after all our science evolved. Can philosophy give us any guidance toward a final theory? The value today of philosophy to physics seems to me to be something like the value of early nation-states to their peoples. It is only a small exaggeration to say that, until the introduction of the post office, the chief service of nation-states was to protect their peoples from other nation-states. The insights of philosophers have occasionally benefited physicists, but generally in a negative fashion—by protecting them from the preconceptions of other philosophers. I do not want to draw the lesson here that physics is best done without preconceptions. At any one moment there are so many things that might be done, so many accepted principles that might be challenged, that without some guidance from our preconceptions one could do nothing at all. It is just that philosophical principles have not generally provided us with the right preconceptions. In our hunt for the final theory, physicists are more like hounds than hawks; we have become good at sniffing around on the ground for traces of the beauty we expect in the laws of nature, but we do not seem to be able to see the path to the truth from the heights of philosophy. Physicists do of...
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...1 The analysis of Graphene material Alinur Mirassov, Azat Yerkinova, Gaukhar Balbayeva Madi Aldabergenov, Takhmina Torgayeva Abstract: Recently, graphene has attracted the interest of significant number of scientists and physicians due to its exceptional properties (e.g., large surface area, thermal and chemical stability, high conductivity). This new member of the carbon family has potential to revolutionize the current applications (some of them are described in the essay) as well as creating new set of applications. In this paper, we review the background of the novel material, its comprehensive atomic structure and properties that has fascinated the scientific community since its discovery. We also cover the synthesis of the material, including different effective methods that was investigated from the year of discovery until the present day. Finally, we discuss possible challenges and future perspectives in this rapidly enhancing scientific area. Key words: Graphene; Graphene-based material; 2-dimensional (2D); monolayer; Carbon nanotubes; Dirac level; fullerene; nanostructure; graphene synthesis; graphene applications. Reference to this paper should be made as follows: Aldabergenov, M., Balbayeva, G., Mirassov, A., Yerkinova, A. & Torgayeva, T. (2013) ‘The analysis of Graphene Material’, Astana: Nazarbayev University. 1 Introduction With the time movement and generation flow, the science and engineering achievements expands and widens by...
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...The Grand Design ALSO BY STEPHEN HAWKING A Brief History of Time A Briefer History of Time Black Holes and Baby Universes and Other Essays The Illustrated A Brief History of Time The Universe in a Nutshell FOR CHILDREN George’s Secret Key to the Universe (with Lucy Hawking) George’s Cosmic Treasure Hunt (with Lucy Hawking) ALSO BY LEONARD MLODINOW A Briefer History of Time The Drunkard’s Walk: How Randomness Rules Our Lives Euclid’s Window: The Story of Geometry from Parallel Lines to Hyperspace Feynman’s Rainbow: A Search for Beauty in Physics and in Life FOR CHILDREN The Last Dinosaur (with Matt Costello) Titanic Cat (with Matt Costello) The Grand Design The Grand Design The Grand Design The Grand Design Copyright © 2010 by Stephen W. Hawking and Leonard Mlodinow Original art copyright © 2010 by Peter Bollinger All rights reserved. Published in the United States by Bantam Books, an imprint of The Random House Publishing Group, a division of Random House, Inc., New York. Cartoons by Sidney Harris, copyright © Sciencecartoonsplus.com BANTAM BOOKS and the rooster colophon are registered trademarks of Random House, Inc. eISBN: 978-0-553-90707-0 www.bantamdell.com v3.0 The Grand Design The Grand Design The Grand Design The Grand Design E EACH EXIST FOR BUT A SHORT TIME, and in that time explore but a small part of the whole universe. But humans are a curious species. We wonder, we seek answers. Living in this vast world that...
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...ES8005 – Chapter 1 A system is any portion of the universe that can be isolated for the purpose of observing & measuring changes A system must have a boundary that sets it apart from its surroundings 3 basic types of systems 1. Isolated system * Boundary prevents the system from exchanging BOTH matter & energy with its surroundings. * Both matter and energy within the system are fixed & finite because none can enter and none can leave the system. * Imaginary – impossible for any real boundary to be so perfectly insulated that energy can neither enter or escape. 2. Closed system * Boundary permits the exchange of energy, but not matter within its surroundings * Matter within the system is finite but energy is exchangeable in and out of the system 3. Open system * Boundary permits exchange of both energy and matter * Ie. Island. * Open systems are more difficult to study because they have more potential for uncontrolled variation Box model * A model is a representation of something. * A box model can show the essential features of a system. i. The process by which matter enters & leaves the system and the rates at which they do so ii. The process which matter moves among the various parts of the system internally & the rates at which this happens iii. The amount of matter (or energy) in the system at a given time and its distribution within the system * The amount of matter...
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...Questions to consider throughout the course: Boundary layer of clay Will California fall into the sea? What regulates climate? etc. (see lecture notes) THE SCIENTIFIC METHOD Observe Generalize and/ make a hypothesis Test the hypothesis Revise hypothesis if necessary - hypothesis has to be falsify able, com Lecture 2 Electromagnetic between positive charges of the nucleus and negative charges of the electrons FUNDAMENTAL FORCES REVIEW Gravity - depends on mass and distance Electromagnetic - depends on charge, distance Strong Force - between hadrons Weak Force - between hadrons and some leptons Protons and neutrons (hardrons) are made out of smaller particles called quarks Leptons: includes electrons (mass & charge), neutrinos (mass, no charge) and their antiparticles Field particles: transmit fundamental forces Conservation Laws - Quantities conserved Energy-Mass Momentum (oriented) *Angular momentum (oriented) Charge Spin (oriented) # of Hadrons (number conserved) # of Leptons (number conserved) FORMS OF ENERGY Kinetic Potential Heat Chemical Mass Electromagnetic radiation Changes in volume When a thing is dropped and stopped by an object, electromagnetic force is overcoming the gravity force overlap of electron clouds of two objects First law of Thermodynamics Energy may be converted from one form to another, but the total must be conceived in any interactions. (Energy is conserved) THE UNCERTAINTY PRINCIPLE When...
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...SCHAUM'S OUTLINE OF THEORY AND PROBLEMS OF COLLEGE PHYSICS Ninth Edition . FREDERICK J. BUECHE, Ph.D. Distinguished Professor at Large University of Dayton EUGENE HECHT, Ph.D. Professor of Physics Adelphi University . SCHAUM'S OUTLINE SERIES McGRAW-HILL New York St. Louis San Francisco Auckland Bogota Caracas Lisbon London Madrid Mexico City Milan Montreal New Delhi San Juan Singapore Sydney Tokyo Toronto McGraw-Hill abc Copyright © 1997, 1989, 1979, 1961, 1942, 1940, 1939, 1936 by The McGraw-Hill Companies, Inc All rights reserved. Manufactured in the United States of America. Except as permitted under the United States Copyright Act of 1976, no part of this publication may be reproduced or distributed in any form or by any means, or stored in a database or retrieval system, without the prior written permission of the publisher. 0-07-1367497 The material in this eBook also appears in the print version of this title: 0-07-008941-8. All trademarks are trademarks of their respective owners. Rather than put a trademark symbol after every occurrence of a trademarked name, we use names in an editorial fashion only, and to the benefit of the trademark owner, with no intention of infringement of the trademark. Where such designations appear in this book, they have been printed with initial caps. McGraw-Hill eBooks are available at special quantity discounts to use as premiums and sales promotions, or for use in corporate training programs. For more...
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...Introductory Physics I Elementary Mechanics by Robert G. Brown Duke University Physics Department Durham, NC 27708-0305 rgb@phy.duke.edu Copyright Notice Copyright Robert G. Brown 1993, 2007, 2013 Notice This physics textbook is designed to support my personal teaching activities at Duke University, in particular teaching its Physics 141/142, 151/152, or 161/162 series (Introductory Physics for life science majors, engineers, or potential physics majors, respectively). It is freely available in its entirety in a downloadable PDF form or to be read online at: http://www.phy.duke.edu/∼rgb/Class/intro physics 1.php It is also available in an inexpensive (really!) print version via Lulu press here: http://www.lulu.com/shop/product-21186588.html where readers/users can voluntarily help support or reward the author by purchasing either this paper copy or one of the even more inexpensive electronic copies. By making the book available in these various media at a cost ranging from free to cheap, I enable the text can be used by students all over the world where each student can pay (or not) according to their means. Nevertheless, I am hoping that students who truly find this work useful will purchase a copy through Lulu or a bookseller (when the latter option becomes available), if only to help subsidize me while I continue to write inexpensive textbooks in physics or other subjects. This textbook is organized for ease of presentation and ease of learning. In particular, they are...
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...www.GetPedia.com Click on your interest section for more information : Acne q Advertising q Aerobics & Cardio q Affiliate Revenue q Alternative Medicine q Attraction q Online Auction q Streaming Audio & Online Music q Aviation & Flying q Babies & Toddler q Beauty q Blogging, RSS & Feeds q Book Marketing q Book Reviews q Branding q Breast Cancer q Broadband Internet q Muscle Building & Bodybuilding q Careers, Jobs & Employment q Casino & Gambling q Coaching q Coffee q College & University q Cooking Tips q Copywriting q Crafts & Hobbies q Creativity q Credit q Cruising & Sailing q Currency Trading q Customer Service q Data Recovery & Computer Backup q Dating q Debt Consolidation q Debt Relief q Depression q Diabetes q Divorce q Domain Name q E-Book q E-commerce q Elder Care q Email Marketing q Entrepreneur q Ethics q Exercise & Fitness q Ezine Marketing q Ezine Publishing q Fashion & Style q Fishing q Fitness Equipment q Forums q Game q Goal Setting q Golf q Dealing with Grief & Loss q Hair Loss q Finding Happiness q Computer Hardware q Holiday q Home Improvement q Home Security q Humanities q Humor & Entertainment q Innovation q Inspirational q Insurance q Interior Design & Decorating q Internet Marketing q Investing q Landscaping & Gardening q Language q Leadership q Leases & Leasing q Loan q Mesothelioma & Asbestos Cancer q Business Management q Marketing q Marriage & Wedding q Martial Arts ...
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...Employment News 31 May - 6 June 2014 www.employmentnews.gov.in 21 UNION PUBLIC SERVICE COMMISSION EXAMINATION NOTICE NO. 09/2014-CSP (LAST DATE FOR RECEIPT OF APPLICATIONS : 30/06/2014) DATE :31.05.2014 CIVIL SERVICES EXAMINATION, 2014 (Commission’s website-http://upsc.gov.in) F. No. 1/5/2013-E.I(B) : Preliminary Examination of the Civil Services Examination for recruitment to the Services and Posts mentioned below will be held by the Union Public Service Commission on 24th Aug., 2014 in accordance with the Rules published by the Department of Personnel & Training in the Gazette of India Extraordinary dated 31st May, 2014. (i) Indian Administrative Service. (ii) Indian Foreign Service. (iii) Indian Police Service. (iv) Indian P & T Accounts & Finance Service, Group ‘A’. (v) Indian Audit and Accounts Service, Group ‘A’. (vi) Indian Revenue Service (Customs and Central Excise), Group ‘A’. (vii) Indian Defence Accounts Service, Group ‘A’. (viii) Indian Revenue Service (I.T.), Group ‘A’. (ix) Indian Ordnance Factories Service, Group ‘A’ (Assistant Works Manager, Administration). (x) Indian Postal Service, Group ‘A’. (xi) Indian Civil Accounts Service, Group ‘A’. (xii) Indian Railway Traffic Service, Group ‘A’. (xiii) Indian Railway Accounts Service, Group 'A'. (xiv) Indian Railway Personnel Service, Group ‘A’. (xv) Post of Assistant Security Commissioner in Railway Protection Force, Group ‘A’ (xvi) Indian Defence Estates Service, Group...
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