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physics.003 - xx 43.3 43.4 43.5 43.6 43.7 43.8 A-PDF Split...

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xx Detailed Contents 43.3 Nuc ear Stability and Radioactivity 1478 44.7 The Beginning of Time 1538 43.4 Activities aDd Half. ives 1485 SummarylKey Terms 1547 43.5 Biological Effects of Radiation 1489 QuestionslExelCiseslProblems 1548 43.6 Nuc. ear React" DS 1492 43.7 Nuclear Fmion 1494 43.8 Nuclear Fusion 1498 SummarylKey Terms 1502 APPENDICES QuesrionslExe,rciseslProblems 1S03 A The Internal: nal System of Units A-I B Useful Mathematical Relations A-3 44 PARTICLE PHYSICS AND 'C The Greek Alphabet A4 COSMOLOGY 1509 D Periodic Table of Elements A-5 44.1 Fundamental Partitcles--AHistory .1509 E Unit Conversion Factors A-6 44.2 ParticleAccelerators and Detectors 1514 F Numerical Coostants A-7 44.3 Particles and Interactions 1519 Answers to Odd- umbered frob· ems A-9 44.4 Quarks and the Eightfold Way 152S Photo Credits C-l 44.5 The Standard Model and Beyond 1530 Index -1 44.6 The Expanding Universe 1532 A-PDF Split DEMO : Purchase from www.A-PDF.com to remove the watermark
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UNITS, PHYSICAL QUANTITIES, AND VECTORS ? Be- g bSe to pre- did the path of a hum- cane is essentia for minimi ,g the damage it does to lives d property. If a hurricane is moving at 20 km/h in a direCofl 53" . orth of east, how fa. nodh does the Jicane m<JIIe j- one 117 LEARN NG GOALS By sI1I4yill' tills dlJllfel; )'CNl wiD IHnr. What the fundamental quantities of mechanics are, and the units physicists use to measure 1hem. ,How to keep track of signilicanr flgures in your calculations. lhe difference between scalars and vectors, and how to add and su d: veetOfS gmphica y. What the components of a vector are, and how to use them in calculations. What unit vectoJS ate, and how to use them with oomponents to describe vectOTS. Two ways of muhiplying vectors. he study of physics is important because physics is OJle of the most funda... meatal of the scie ces. Scientists of all disciplines make use of the ideas of pllysics. including chemists who study the Btmcture of molecu es. pale- ontologists who tty to reconstnlct how dinosaurs waIl~ and climatologists who study how human activities affect the atmosphet'e and oceans. Physics is also the fo dation of all engineering and technology. 0 engineer could design a fiat- screen Tv, an interplanetary spacecraft, or even a better mouseu-ap without first UlldersmndiRg the basic laws of pbysics_ The study of physics is also an adventure. ¥oo wID find it challenging. 80me- times frustrating, occasionally painful, and often richly rewarding and satisfy- ing. It wID appeal [0 your sense of beauty as wen as [0 yourratio.a] intelligence. lfyou'veverwondered why tb skyislue, how radio waves can tra 1 through empty space, or how 81 sarelJ.De. stays in orbit, yo can find e answe18 by .sing fundamental physics. Above aU, you will come to ee physics as a towering achievement of th human intellect in irs quest [0 un erstand our world and ourselves.
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