In the past few years, a handful of scientists have been in a race to explain a disturbing aspect of our universe: only 4 percent of it consists of the matter that makes up you, me, our books, and every planet, star, and galaxy. The rest—96 percent of the universe—is completely unknown.   Richard Panek tells the dramatic story of how scientists reached this conclusion, and what they’re doing to find this "dark" matter and an even more bizarre substance called dark energy. Based on in-depth, on-site reporting and hundreds of interviews—with everyone from Berkeley’s feisty Saul Perlmutter and Johns Hopkins’s meticulous Adam Riess to the quietly revolutionary Vera Rubin—the book offers an intimate portrait of the bitter rivalries and fruitful collaborations, the eureka moments and blind alleys, that have fueled their search, redefined science, and reinvented the universe.

    We often overlook the historical link between mathematics and technological advances, says Stewart—but this connection is integral to any complete understanding of human history.Equations are modeled on the patterns we find in the world around us, says Stewart, and it is through equations that we are able to make sense of, and in turn influence, our world. Stewart locates the origins of each equation he presents—from Pythagoras's Theorem to Newton's Law of Gravity to Einstein's Theory of Relativity—within a particular historical moment, elucidating the development of mathematical and philosophical thought necessary for each equation's discovery. None of these equations emerged in a vacuum, Stewart shows; each drew, in some way, on past equations and the thinking of the day. In turn, all of these equations paved the way for major developments in mathematics, science, philosophy, and technology. Without logarithms (invented in the early 17th century by John Napier and improved by Henry Briggs), scientists would not have been able to calculate the movement of the planets, and mathematicians would not have been able to develop fractal geometry. The Wave Equation is one of the most important equations in physics, and is crucial for engineers studying the vibrations in vehicles and the response of buildings to earthquakes. And the equation at the heart of Information Theory, devised by Claude Shannon, is the basis of digital communication today.An approachable and informative guide to the equations upon which nearly every aspect of scientific and mathematical understanding depends, In Pursuit of the Unknown is also a reminder that equations have profoundly influenced our thinking and continue to make possible many of the advances that we take for granted.

    And yet, disturbingly, in today's so-called information age, pseudoscience is burgeoning with stories of alien abduction, channeling past lives, and communal hallucinations commanding growing attention and respect. As Sagan demonstrates with lucid eloquence, the siren song of unreason is not just a cultural wrong turn but a dangerous plunge into darkness that threatens our most basic freedoms.

    The Universe, of course, is our own. And Roundworld is Earth. As the wizards watch their accidental creation grow, we follow the story of our universe from the primal singularity of the Big Bang to the Internet and beyond. Through this original Terry Pratchett story (with intervening chapters from Cohen and Stewart) we discover how puny and insignificant individual lives are against a cosmic backdrop of creation and disaster. Yet, paradoxically, we see how the richness of a universe based on rules, has led to a complex world and at least one species that tried to get a grip of what was going on.

    

    This is type of problems asked at the JEE (IIT). The purpose of this book is to show students how to handle such problems and give them sufficient practice in solving problems of this type, thus building their confidence. The main features of this book are:Each chapter begins with a summary of facts, formulate and working techniques. Trick, tips and techniques have been clearly marked with the icon.A large number of problems have been solved and explained in each chapter.The exercises contain short-answer, long-answer and objective type questions.Multiple-choice questions in which more than one option may be correct have also been given.Time-bound tests at the end of each chapter will help students practise answering questions in a given time.The book also includes integrated tests, bases on all the chapters.A chapter containing miscellaneous problems has been given at the end of the book. This will help students gain confidence in solving problems without prior knowledge of the chapter(s) to which the problems belong.Table of ContentsAlgebraProgressions, Related Inequalities and SeriesDeterminants and Cramer's RuleEquations, Inequations and ExpressionsComplex NumbersPermutation and CombinationBinomial Theorem for Positive Integral IndexPrinciple of Mathematical Induction (PMI)Infinite SeriesMatricesTrigonometryCircular Functions, IdentitiesSolution of EquationsInverse Circular FunctionsTrigonometrical Inequalities and InequationsLogarithmProperties of TriangleHeights and DistancesCoordinate GeometryCoordinates and Straight LinesPairs of Straight Lines and Transformation of AxesCirclesParabolaEllipse and HyperbolaCalculusFunctionDifferentiationLimit, Indeterminate FormContinuity, Differentiability and Graph of FunctionApplication of dy/dxMaxima and MinimaMonotonic Function and Lagrange's TheoremIndefinite In

    One morning he misses his bus when he stops to put a strange caterpillar in a matchbox. As the bus passes he’s shocked to spot himself inside. Like Schrödinger’s Cat in the famous quantum thought experiment, the caterpillar's spawned parallel possibilities. This comic novel explores Graham’s search for a better life among the various overlapping alternatives.Another clone, Grim Dupeint, is a loathsome international arms dealer. Graham infiltrates Grim’s corporation, then embezzles cash for charity. When a furious Grim realises, Graham must act fast. And right now he's acting like fish food.Graham launches upon a new lifestyle (and sex life) as he dons the designer suits of power. But sinister figures soon see through Graham’s clothing. Now Graham’s under attack from the corporation, the police, his ex-wife’s private detective, and an infuriatingly pompous water-colourist who Graham might have been if he’d gone to art college rather than business school. To survive (and steal the artist’s wonderful woman) Graham needs to find hidden resources. By definition Dopplegraham’s equally resourceful. Bugger...Schrödinger's Caterpillar - a stupid book for brainy people!

    It expands on the foundation acquired in chemistry courses and enables students to understand the mechanisms as they come across them in your classroom or laboratory.Organic Reaction Mechanisms provides extensive coverage of various organic reaction and rearrangements with emphasis on their applications in syntheses. The authors discuss reaction pathways, such as substitutions, additions, eliminations, oxidations, reductions, aromatic substitutions, aliphatic nucleophilic substitution, and electrophilic substitutions with numerous reaction equations to show the mechanism. The text also details the various reaction intermediates, including carbocations, carbanions, free radicals, carbenes, nitrines, benzynes, arynes, ylides, and enamines.Furthermore, the reagents are surveyed throughout the text, and correlation tables are provided to aid in identifying which oxidation/reduction agents to use for oxidizing/reducing various types of compounds. The applications of organic reagents are illustrated with examples and problems at the end of each chapter, which also serve to review the mechanisms learned and topics discussed. A comprehensive discussion on organic reactions, Organic Reaction Mechanisms will benefit advanced undergraduate and graduate chemistry students in their understanding and application of organic syntheses.

    But ask what it means, and the result will be a brawl. For a century, most physicists have followed Niels Bohr's Copenhagen interpretation and dismissed questions about the reality underlying quantum physics as meaningless. A mishmash of solipsism and poor reasoning, Copenhagen endured, as Bohr's students vigorously protected his legacy, and the physics community favored practical experiments over philosophical arguments. As a result, questioning the status quo long meant professional ruin. And yet, from the 1920s to today, physicists like John Bell, David Bohm, and Hugh Everett persisted in seeking the true meaning of quantum mechanics. What Is Real? is the gripping story of this battle of ideas and of the courageous scientists who dared to stand up for truth.

    Edited by ETS, the people who make the test! Find out all about the new TOEFL Internet-based test; Get over 500 real TOEFL questiond and essay topics

    We need to begin with the ideas that informed Paul’s worldview and culture. Our goal is simple – to see things the way he saw them rather than the way we see them.· What if the whole idea of ‘original sin’ was never part of Paul’s thinking at all? · What if the idea that we are saved by faith in Christ, as Luther so strongly argued, was based on a mistranslation of Paul’s words, and even more seriously on a misunderstanding of Paul’s thinking? Was Luther – and Calvin who followed him – simply terribly wrong?‘The tragedy,’ writes Steve Chalke, ‘is that over the centuries the Church has time and again failed to communicate, or even to understand, the core of Paul’s message. Although Paul has often been presented as the champion of exclusion, he was the very opposite. He was the great includer; a revolutionary who saw a new inclusive world dawning and gave his life to help bring it in.’ Steve Chalke MBE is a Baptist minister, founder and leader of the Oasis Charitable Trust, and author of more than 50 books.

    A couple of thousand feet in the air, hanging from eagle talons and bleeding out. Just a typical bad day for a rebellious cat. Meet Dascha, a perfect example of contrariness and smarts. This young Russian Blue is not interested in following the family business, at all! But a moment of inattention leads to danger and pain, and she is left with some hard decisions to make. Will she survive mage attacks, wolves, and, worst of all, her instructors?

     Four lonely shifters looking for love while they battle a mysterious enemy. Trained to be protective guardians, their skills are intimidating and their desire to find a mate is unmatched. Tall, growly and ready to tear apart anything that threatens their fated one, these bears will stop at nothing as they fight the Agency for their lives, and those of the ones they love. Danger, betrayal and violence have been the hallmarks of their lives so far, but from here on out, their stubborn, no-nonsense mates will force them to temper that with love, passion and desire, forging them into the weapon that will lay their enemies low and stoke the fires of a love everlasting. Connor, Justin, Josh and Jared’s stories are all contained in this one convenient, low-priced bundle for your reading pleasure. Follow along as they fight for love, honor and life. Stories contained in this bundle: Bravo Bear Blackblood Bear Silverbullet Bear Kingpin Bear

    From the start, it is clearly a case of foul play, but every thread toward the culprit leads to a fresh tangle. Is the local lord involved? The uni students camping on the land? Criminals hunting for a lost treasure?Fortunately, Conall has a secret weapon to cut through to the truth: his eccentric, genius cousin, Shay. But even then, will the pair survive what they uncover in the dark of the night?

    Marcin Milkowski, Ph.D. and Prof. Dariusz Jemielniak, Ph.D. It is the largest English-Polish dictionary ever published. It contains over 1.8 million words, covering hundreds of thousands of meanings in over two hundred thousand definitions, includign abbreviations, synonyms, antonyms, et al. Its range is over 20% wider than in the case of any dictionary published before.It is also the first English-Polish dictionary developed in the 21st century, basing on actual English language usage and frequencies (based on corpora of American, British, and Canadian English), covering not only general vocabulary, but also terminology and idioms typical for business, finance, law, medicine, the sciences and technology, including over 150 disciplines! It is the first English-Polish dictionary including words such as QWERTY, screenager, smartphone, tablet or boccia, with their proper pronunciation. The dictionary can replace the standard Kindle e-reader dictionary, to allow one-click lookups (please, note that this functionality is typical for all Kindle e-readers, but not necessarily a tablet).