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Ons weet dat die maan iets met die getye te doen het, maar het jy geweet dat jy met volmaan altyd dieselfde kant van die maan sien? Of dat weerligstrale vol vernietigende elektrisiteit is, maar dat ’n elektriese paling ’n lading van tot 600 volt kan vrystel?
Hierdie feite is deel van ’n magdom kennis oor die natuur, fisiese wetenskap en die ruimte wat die RSG-program Hoe verklaar jy dit? reeds jare lank beantwoord. Hierdie publikasie bevat ’n keur uit die honderde vrae van nuuskierige luisteraars wat deur kundiges verduidelik is om die węreld minder vreemd te maak, want nie alle kennis van die węreld om ons is voor die hand liggend nie. Daar is honderde verskynsels in die natuur en ruimte wat vra om verklaar te word. Dan praat ons nie eens van die mensgemaakte uitvindings soos die internet, persoonlike rekenaars, globale posisioneringstelsels, selfone, radiogolwe, teorie van evolusie, relatiwiteitsteorie, narkose en mense in die ruimte nie. Agter die alledaagse skuil die fassinerende werking van kragte en wette en die wetenskap in werking: Wat bepaal dat ’n mens se hart aan die linkerkant van die liggaam sit? Hoekom vries water in ’n dam van bo en nie van onder af nie? Kan gene deur omstandighede gemodifiseer word?
Hoe Verklaar Jy Dit? is ’n boek wat jou belangstelling in die węreld om jou sal prikkel. Dit is ’n boek wat op sy eie gelees kan word, wat op die koffietafel kan lę en wat saam kan gaan kamp om wonderlike gesprekke om die braaivleisvuur uit te lok.
Sky Guide 2017: Africa South is a practical resource for all astronomers, whether they be novice, amateur or professional. It covers the upcoming year’s planetary movements, predicted eclipses, meteor showers – any events and facets of the night sky that change annually. Star charts plot the evening sky for each season, facilitating the identification of stars and constellations. The guide contains a wealth of information about the Sun, Moon, planets, comets, meteors and bright stars, with photos, diagrams, charts and images. There’s also an excellent list of useful websites and a comprehensive glossary.
This annual publication is an invaluable guide for anyone who has even a passing interest in the night skies of southern Africa and is ‘… an absolute must for first-time star-gazers and professional astronomers alike’.
Look inside for the tear-out entry form and enter to win an iOptron’s Astroboy portable telescope. The built-in computer moves the telescope so that it stays on target as the Earth rotates. Just click and it finds stars, planets, and deep-sky objects for you.
Ten years ago, the idea of getting into a stranger’s car, or walking into a stranger’s home, would have seemed bizarre and dangerous, but today it’s as common as ordering a book online. Uber and Airbnb are household names: redefining neighbourhoods, challenging the way governments regulate business and changing the way we travel.
In the spirit of iconic Silicon Valley renegades like Steve Jobs and Bill Gates, a new generation of entrepreneurs is sparking yet another cultural upheaval through technology. They are among the Upstarts, idiosyncratic founders with limitless drive and an abundance of self-confidence. Young, hungry and brilliant, they are rewriting the traditional rules of business, changing our day-to-day lives and often sidestepping serious ethical and legal obstacles in the process.
The Upstarts is the definitive account of a dawning age of tenacity, creativity, conflict and wealth. In Brad Stone’s highly anticipated and riveting account of the most radical companies of the new Silicon Valley, we find out how it all started, and how the world is wildly different than it was ten years ago.
Families can discover the universe around us in this book that's a brilliant addition to any family, offering a concise and useful guide on outer space.
The stunning images and cutaway illustrations take you on a fantastic visual journey and help to satisfy the curiosity of the most inquisitive minds with these beautifully illustrated editions.
This text teaches maths in a step-by-step fashion - ideal for students on first-year engineering and pre-degree courses. - Hundreds of examples and exercises, the majority set in an applied engineering context so that you immediately see the purpose of what you are learning - Introductory chapter revises indices, fractions, decimals, percentages and ratios - Fully worked solutions to every problem on the companion website at www.palgrave.com/engineering/singh plus searchable glossary, e-index, extra exercises, extra content and more!
Engineering Mathematics is the best-selling introductory mathematics text for students on science and engineering degree and pre-degree courses. Sales of previous editions stand at more than half a million copies. It is suitable for classroom use and self-study. Its unique programmed approach takes students through the mathematics they need in a step-by-step fashion with a wealth of examples and exercises. The book is divided into two sections with the Foundation section starting at Level 0 of the IEng syllabus and the main section extending over all elements of a first year undergraduate course and into many second year courses. The book therefore suits a full range of abilities and levels of access. The Online Personal Tutor guides students through exercises in the same step-by-step fashion as the book, with hundreds of full workings to questions.
We all know South Africa has problems; we read about them in the newspapers, we see them on the streets and many people experience them in their daily lives. Fortunately, many of these problems can be solved using innovation and science. Innovation takes a look at inventions - developed in South Africa by South Africans - to address issues in the areas of healthcare, energy, environment and industry. Some of these inventions, such as a tea bag created to filter water for communities in rural areas, can save lives; others, such as a unique way to beneficiate titanium, could spell a new era of industry in the country.
The book is broken down into sections on environment, health, energy, industry and education, and in each of those parts are examples of South African innovations, from a satellite system to map fires to the concept of sterilising mosquitoes to stop the spread of malaria.
These have been developed by numerous organisations and institutions and showcase South Africa's excellence.
Our planet is in the grip of an obesity pandemic. More than a billion people worldwide are overweight and over 600 million are obese. We live in an obesogenic environment in which it is much easier to get fat than to stay fit. How has this come to be? Who is to blame? What can we do?
In Fat Planet, Dr David Lewis and Dr Margaret Leitch examine the social and psychological causes of the obesity pandemic in order to answer these questions. They use ground-breaking research to highlight the behaviour of corporations that relentlessly promote foods high in sugar, fat and salt, and show that these 'junk' foods have shockingly similar neurological effects to hard drugs. They consider the prevalence of food cues which unconsciously stimulate our desire to consume. And they debunk the myths of fad diets and slimming pills, suggesting practical, easily implemented strategies for sustainable weight loss.
The evidence is clear: our problem with obesity must be addressed or we will face catastrophic consequences. It is not too late to change.
DIFFERENTIAL EQUATIONS WITH BOUNDARY-VALUE PROBLEMS, 8E, International Edition strikes a balance between the analytical, qualitative, and quantitative approaches to the study of differential equations. This proven and accessible book speaks to beginning engineering and math students through a wealth of pedagogical aids, including an abundance of examples, explanations, "Remarks" boxes, definitions, and group projects. Written in a straightforward, readable, and helpful style, the book provides a thorough treatment of boundary-value problems and partial differential equations.
Made into a major motion picture, this moving memoir written by Stephen Hawking’s first wife covers the turbulent years of her marriage to the astrophysics genius, her traumatic divorce, and their recent reconciliation
Professor Stephen Hawking is one of the most famous and remarkable scientists of our age and the author of the scientific bestseller A Brief History of Time, which has sold more than 25 million copies. In this compelling memoir, his first wife, Jane Hawking, relates the inside story of their extraordinary marriage. As Stephen's academic renown soared, his body was collapsing under the assaults of a motor neuron disease. Jane's candid account of trying to balance his 24-hour care with the needs of their growing family reveals the inner strength of the author, while the self-evident character and achievements of her husband make for an incredible tale presented with unflinching honesty.
Jane's candor is no less apparent when the marriage finally ends in a high-profile meltdown, with Stephen leaving Jane for one of his nurses and Jane marrying an old family friend. In this exceptionally open, moving, and often funny memoir, Jane Hawking confronts not only the acutely complicated and painful dilemmas of her first marriage, but also the relationship's fault lines exposed by the pervasive effects of fame and wealth.
The result is a book about optimism, love, and change that will resonate with readers everywhere. readers everywhere.
Racist thinking – that intelligence is influenced by racial origin, for example – was part of mainstream science a century ago and, surprisingly, is still endorsed by maerick scientists at some of the world’s most respectable institutions today. The myths being perpetuated on genetics, race, IQ and general intelligence are what Black Brain, White Brain challenges – precisely, systematically and in painstaking detail.
In this immensely readable book Evans tackles highly complex subjects, from the origin of humans and the genesis of intelligence to athletic performance and genes, IQ and cleverness, in a fluent and engaging style that makes science accessible and the facts absorbing. Persuasive, without being didactic or sermonising, and lightened by a wry sense of humour, Evans’s text weaves it all together in such a way that one is keen to follow all the threads the better to see the larger tapestry.
Carefully balancing claims, testing dodgy propositions and presenting fairly the theories of modern scientists and evolutionary psychologists, Evans shows just how uniform we are, genetically, as a species and that it’s mainly the environment we grow up and live in that’s the strong determining factor in general intelligence.
Discrete Mathematical Structures, Sixth Edition, offers a clear and concise presentation of the fundamental concepts of discrete mathematics. Ideal for a one-semester introductory course, this text contains more genuine computer science applications than any other text in the field. This book is written at an appropriate level for a wide variety of majors and non-majors, and assumes a college algebra course as a prerequisite.
From the Sunday Times top ten bestselling author of The Psychopath Test, comes a captivating and brilliant exploration of one of our world's most underappreciated forces: shame. 'It's about the terror, isn't it?' 'The terror of what?' I said. 'The terror of being found out.'
For the past three years, Jon Ronson has travelled the world meeting recipients of high-profile public shamings. The shamed are people like us - people who, say, made a joke on social media that came out badly, or made a mistake at work. Once their transgression is revealed, collective outrage circles with the force of a hurricane and the next thing they know they're being torn apart by an angry mob, jeered at, demonized, sometimes even fired from their job. A great renaissance of public shaming is sweeping our land. Justice has been democratized. The silent majority are getting a voice. But what are we doing with our voice?
We are mercilessly finding people's faults. We are defining the boundaries of normality by ruining the lives of those outside it. We are using shame as a form of social control. Simultaneously powerful and hilarious in the way only Jon Ronson can be, So You've Been Publicly Shamed is a deeply honest book about modern life, full of eye-opening truths about the escalating war on human flaws - and the very scary part we all play in it.
What are things made of? What is the sun? Why is there night and day, winter and summer? Why do bad things happen? Are we alone? Throughout history people all over the world have invented stories to answer profound questions such as these. Have you heard the tale of how the sun hatched out of an emu's egg? Or what about the great catfish that carries the world on its back? Has anyone ever told you that earthquakes are caused by a sneezing giant? These fantastical myths are fun - but what is the real answer to such questions?
The Magic of Reality, with its explanations of space, time, evolution and more, will inspire and amaze readers of all ages - young adults, adults, children, octogenarians. Teaming up with the renowned illustrator Dave McKean, Richard Dawkins answers all these questions and many more. In stunning words and pictures this book presents the real story of the world around us, taking us on an enthralling journey through scientific reality, and showing that it has an awe-inspiring beauty and thrilling magic which far exceed those of the ancient myths.
We encounter rainbows, our genetic ancestors, tsunamis, shooting stars, plants, animals, and an intriguing cast of characters in this extraordinary scientific voyage of discovery. Richard Dawkins and Dave McKean have created a dazzling celebration of our planet that will entertain and inform for years to come.
Chemistry, Seventh Edition provides the necessary practice, support, concept mastery and individualized instruction that ensure success in the General Chemistry course.
The unique "chemical tools" approach employed in this book provides a way of thinking that helps readers develop the ability to analyze and solve both mathematical and conceptual problems.
New to This Edition:
The Wiley Advantage
He became obsessed with fish during his early childhood and carried this passion with him throughout his career. Mike Bruton was born in the town where the first living coelacanth was discovered and studied at Rhodes University in South Africa at the same time as the great ichthyologist, Professor JLB Smith, who described ‘old fourlegs’. He subsequently became Director of the Ichthyology Institute established in Smith’s name and pioneered searches for the coelacanth off the coast of southern Africa and in the Western Indian Ocean using the German research submersible, ‘Jago’. Together with colleagues from South Africa, the USA, Canada and Germany he made many new discoveries on the biology of this extraordinary fish and campaigned internationally for its conservation.
Mike’s research on the freshwater fish of Africa and the Middle East lead to entanglements with crocodiles, hippopotami, giant snakes and military operations but also allowed him to contribute to international efforts to conserve wetlands and endangered species. He also made major contributions to our understanding of the ways in which fish are adapted to their watery environments and how they made that epic evolutionary transition from water onto land.
Whether or not you are a fisherman, aquarist or sushi eater, you will be fascinated by these astonishing tales of a man who almost became a fish!
Alan Tucker's newest issue of "Applied Combinatorics" builds on the previous editions with more in depth analysis of computer systems in order to help develop proficiency in basic discrete math problem solving. As one of the most widely used book in combinatorial problems, this edition explains how to reason and model combinatorically while stressing the systematic analysis of different possibilities, exploration of the logical structure of a problem, and ingenuity.
This book introduces students to all the basics of electronics. After working through this book, a student will have a good knowledge of: DC power supplies; signal/function generators; digital multimeters; oscilloscopes; low power analogue electronic devices.
Taking a practical approach to the subject, Advanced Engineering Mathematics with MATLAB(R), Third Edition continues to integrate technology into the conventional topics of engineering mathematics. The author employs MATLAB to reinforce concepts and solve problems that require heavy computation. MATLAB scripts are available for download at www.crcpress.com Along with new examples, problems, and projects, this updated and expanded edition incorporates several significant improvements. New to the Third Edition * New chapter on Green's functions * New section that uses the matrix exponential to solve systems of differential equations * More numerical methods for solving differential equations, including Adams-Bashforth and finite element methods * New chapter on probability that presents basic concepts, such as mean, variance, and probability density functions * New chapter on random processes that focuses on noise and other random fluctuations Suitable for a differential equations course or a variety of engineering mathematics courses, the text covers fundamental techniques and concepts as well as Laplace transforms, separation of variable solutions to partial differential equations, the z-transform, the Hilbert transform, vector calculus, and linear algebra. It also highlights many modern applications in engineering to show how these topics are used in practice. A solutions manual is available for qualifying instructors.
This text aims to differentiate itself from other business statistics texts in two important ways. It seeks: to present the material in a non-technical manner to make it easier for a student with limited mathematical background to grasp the subject matter; and to develop an intuitive understanding of the techniques by framing them in the context of a management question, giving layman-type explanations of methods, using illustrative business examples and focusing on the management interpretations of the statistical findings. This further edition continues the theme of using Excel as a computational tool to perform statistical analysis. While all statistical functions have been adjusted to the Excel (2013) format, the statistical output remains unchanged. Using Excel to perform the statistical analysis in this text allows a student: To examine more realistic business problems with larger datasets; To focus more on the statistical interpretation of the statistical findings; and to transfer this skill of performing statistical analysis more easily to the work environment. Its overall purpose is to develop a management student's statistical reasoning and statistical decision-making skills to give him or her a competitive advantage in the workplace.
This book covers Statistical methods and Calculations skills. Statistical methods cover collection of data, descriptive methods and inferential methods of analysis. Calculation skills cover elementary calculations, percentages and ratios, equations, graphs and interest calculation. The elementary calculations include basic calculations such as exponents, decimals, scientific notation, logarithms and rounding. Students with no mathematics background can learn how to do basic calculations before concentrating on the statistical applications. For some courses calculations such as interest, future values of investments, graphs and ratios form part of the core module and are also covered in this module.
As the amount of information in biology expands dramatically, it becomes increasingly important for textbooks to distill the vast amount of scientific knowledge into concise principles and enduring concepts.As with previous editions, Molecular Biology of the Cell, Sixth Edition accomplishes this goal with clear writing and beautiful illustrations. The Sixth Edition has been extensively revised and updated with the latest research in the field of cell biology, and it provides an exceptional framework for teaching and learning. The entire illustration program has been greatly enhanced.Protein structures better illustrate structure-function relationships, icons are simpler and more consistent within and between chapters, and micrographs have been refreshed and updated with newer, clearer, or better images. As a new feature, each chapter now contains intriguing openended questions highlighting "What We Don't Know," introducing students to challenging areas of future research. Updated end-of-chapter problems reflect new research discussed in the text, and these problems have been expanded to all chapters by adding questions on developmental biology, tissues and stem cells, pathogens, and the immune system.
Atkins' Physical Chemistry epitomises the benchmark of achievement for a chemistry degree throughout the world. Its broad coverage, concise explanations, and robust mathematical support are clearly presented in an engaging style to furnish students with a solid foundation in the subject. In this ninth edition the authors continue to refine their presentation of physical chemistry. The coverage of introductory topics is streamlined, and the addition of a new fundamentals chapter provides students with an overview of key principles on which the subject is based. The text includes increased coverage of computational chemistry and additional contextual examples of materials chemistry throughout, mirroring the current needs of today's students and lecturers. Mathematics remains an intrinsic yet challenging part of physical chemistry. Extensive mathematical support, including a 'Checklist of key equations' at the end of every chapter, and 'Mathematical background' sections containing worked examples and self-tests, empower students to overcome any barriers to understanding that grasping the mathematical content might present. These features help to ensure the reader can master the subject without a need to sacrifice the rigour and depth of the mathematical content. The pedagogical framework, which is a hallmark of the authors' writing, has been further strengthened. New 'Key points' provide summaries of the main take-home messages of each section and enable students to gain an overview of the topic before tackling it in depth; 'Brief illustrations' give a concise insight into how a particular mathematical concept is applied in practice, providing students with the opportunity to contextualise their learning. All these exciting new features and innovations are presented within a refreshed full colour text design, to stimulate and engage students yet further. The Online Resource Centre contains Living Graphs, illustrations from the book, and web links. An Instructor's Solutions Manual (free to adopters) and a Student's Solutions Manual are also available. Access to the Physical Chemistry eBook is also included with the purchase of the printed text. Offering enhanced functionality, including notetaking and highlighting, it also includes access to 'Explorations in Physical Chemistry', which contains interactive Excel worksheets and exercises related to the Living Graphs, allowing students to visualise, actively explore and test their understanding of the subject.
Dit stel ouers in staat om van vroeg af en te midde van 'n druk lewe alledaagse geleenthede om hulle te gebruik om hul kleingoed gemaklik in die wereld van wiskunde in te lei. En dit verg geen spesiale kennis of opleiding van ouers nie; net 'n positiewe instelling en 'n opskerping van hulle interaksie met hul kleingoed om hulle al spelenderwys vertroud te maak met wiskundebegrippe.
What if intelligent life on Earth evolved not once, but twice? The octopus is the closest we will come to meeting an intelligent alien. What can we learn from the encounter? In Other Minds, Peter Godfrey-Smith, a distinguished philosopher of science and a skilled scuba diver, tells a bold new story of how nature became aware of itself - a story that largely occurs in the ocean, where animals first appeared. Tracking the mind's fitful development from unruly clumps of seaborne cells to the first evolved nervous systems in ancient relatives of jellyfish, he explores the incredible evolutionary journey of the cephalopods, which began as inconspicuous molluscs who would later abandon their shells to rise above the ocean floor, searching for prey and acquiring the greater intelligence needed to do so - a journey completely independent from the route that mammals and birds would later take. But what kind of intelligence do cephalopods possess? How did the octopus, a solitary creature with little social life, become so smart? What is it like to have eight tentacles that are so packed with neurons that they virtually 'think for themselves'? By tracing the question of inner life back to its roots and comparing human beings with our most remarkable animal relatives, Godfrey-Smith casts crucial new light on the octopus mind - and on our own.
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