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Physics & Astronomy

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Physics, Volume I, 3/E
James S. WalkerWestern Washington University

ISBN-10: 0131963929
ISBN-13:  9780131963924

Publisher:  Addison-Wesley
Copyright:  2007
Format:  Paper; 696 pp
Published:  01/13/2006
Status: Out of Print


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Walker uses an integrated "suite" of tools, worked Examples, Active Examples, and Conceptual Checkpoints,  to make conceptual understanding an integral part of solving quantitative problems.  The pedagogy and approach are based on over 20 years of teaching and reflect the results of physics education research.

"How much time do you spend teaching vectors in this course?"

 

Students often enter this course without the math background, including experience with vectors, to be successful. Walker devotes a full chapter (Chapter 3) to vectors to provide an additional resource for students.

 

"What is the problem-solving process you teach your students to use?"

 

Students use the worked Examples in the text as a guide for solving problems. Every worked Example in Walker is structured to provide a systematic process for solving problems:

Picture the Problem reminds students to visualize the situation, identify and label important quantities, and set up a coordinate system. This step is always accompanied by a figure and free-body diagram when appropriate.

Strategy helps students learn to analyze the problem, identify the key physical concepts, and map a plan for the solution.

Solution is presented in two-columns to help students translate the words of the problem on the left to the equations they will use to solve it on the right.

Insight points out interesting or significant features of the problem, solution process, or the result.

Practice Problem is the last part of the Example. Here, students are given the opportunity to test their understanding and skills on a problem similar to the one just worked.

 

"How do you help students go from the worked Examples in the text to the end-of-chapter Problems they are assigned for homework?"

 

Active Examples serve as a bridge between the fully worked Examples and the end-of-chapter Problems. Students take an active role by thinking through the logic of the steps on the left and checking their answers with the answer on the right. This unique pedagogical tool prepares students to better tackle homework problems on their own.

 

 

"What role does conceptual understanding play in your course?"

 

Much like clicker questions an instructor might ask in class, Conceptual Checkpoints serve as a pause in the reading for students to check their understanding. These multiple choice, conceptual questions recognize and address common student misconceptions.

 

 

 "Do you assign and grade conceptual questions for homework?"

 

Conceptual Exerices are conceptual ranking task exercises in multiple-choice format. Because they are multiple-choice they can be assigned and easily graded as paper and pencil homework, in an online homework system, or in class using a personal response system.

A Chapter on Vectors

 Students often enter this course without the math background, including experience with vectors, to be successful. Walker devotes a full chapter (Chapter 3) to introduce vectors and provide an additional resource for students.

 

Worked Examples with Solutions in 2-column format 

Students use the worked Examples in the text as a guide for solving problems. Every worked Example in Walker is structured to provide a systematic process for solving problems:

Picture the Problem reminds students to visualize the situation, identify and label important quantities, and set up a coordinate system. This step is always accompanied by a figure and free-body diagram when appropriate.

Strategy helps students learn to analyze the problem, identify the key physical concepts, and map a plan for the solution.

Solution is presented in two-columns to help students translate the words of the problem on the left to the equations they will use to solve it on the right.

Insight points out interesting or significant features of the problem, solution process, or the result.

Practice Problem is the last part of the Example. Here, students are given the opportunity to test their understanding and skills on a problem similar to the one just worked.

 

Active Examples

Active Examples serve as a bridge between the fully worked Examples and the end-of-chapter Problems. Students take an active role by thinking through the logic of the steps on the left and checking their answers with the answer on the right. This unique pedagogical tool prepares students to better tackle homework problems on their own.

 

 

Conceptual Checkpoints 

Much like clicker questions an instructor might ask in class, Conceptual Checkpoints serve as a pause in the reading for students to check their understanding. These multiple choice, conceptual questions recognize and address common student misconceptions.

 

Problem Solving Notes

Marginal Problem Solving Notes highlight useful problem-solving methods while also pointing out

common pitfalls and misconceptions.

 

Applications

Students taking introductory physics often wonder how the course is applicable to the challenges they will face in their lives and their careers. Students using Walker have commented that every time they ask themselves this, the book points out a relevant and interesting application of the material.  Real-world and Biological applications are identified by a marginal icon. A list of Applications is available in the Preface.

 

Interactive Problems and Interactive Figures

A new section of Interactive Problems has been added to the homework.  In these Problems, an Example, Active Example, Conceptual Checkpoint, or Figure "comes alive" as the computer animates the corresponding physical system.  These Interactive Figures, marked with an icon in the text, are designed to be flexible in their application – they can be used in lecture, as a "virtual lab", or as a component of a homework assignment. They are available in the Walker OneKey cartridges, on the Companion Website, and on the Instructor’s Resource Center on CD-ROM.  By giving direct visual feedback to the student, they help to reinforce what is being learned and to provide an additional pathway of understanding.

 

Chapter Summary

Each chapter contains a Chapter Summary organized in an outline format for easy reference and study. The Third Edition Chapter Summary includes key figures from the chapter which serve as a visual reminder as students review.

 

Problem Solving Summary

In addition to the Chapter Summary, each chapter includes a Problem-Solving Summary. Formatted in an easy-to-reference outline, this summary lists the types of problems covered in the chapter as well as the relevant concepts and specific Examples for each.

 

 Conceptual Questions and Exercises

Conceptual Questions are qualitative questions that allow students to test their understanding of the chapter principles. Because these are open-ended questions, they also provide a resource for in-class or small group discussion.

Conceptual Exerices are conceptual ranking task exercises in multiple-choice format. Because they are multiple-choice they can be assigned and easily graded as paper and pencil homework, in an online homework system, or in class using a personal response system.

Answers to odd-numbered Conceptual Questions and Exercises are available in the back of the book.

 

Integrated Problems (IP)

Integrated Problems, marked IP, contain two parts: a quantitative problem as well as a conceptual question. This format requires students to check their answer to one part against their answer to the other and promotes this kind of thinking as an important step in solving problems.

Contents

 

Applications in the Text               xxi

 

Preface: To the Instructor           xxv

 

Preface: To the Student               xxxix

 

Guide to Features of the Text    xl

 

 

1       Introduction to Physics                1

 

1-1    Physics and the Laws of Nature     2

 

1-2    Units of Length, Mass, and Time    2

 

1-3    Dimensional Analysis    4       

 

1-4    Significant Figures       5

 

1-5    Converting Units          8

 

1-6    Order-of-Magnitude Calculations    10

 

1-7    Scalars and Vectors     11

 

1-8    Problem Solving in Physics    11

 

        Chapter Summary       13

 

        Conceptual Questions           14

 

        Conceptual Exercises   14

 

        Problems    14

 

 

PART I   MECHANICS

 

2       One-Dimensional Kinematics     17

 

2-1    Position, Distance, and Displacement      18

 

2-2    Average Speed and Velocity          19

2-3    Instantaneous Velocity         23

 

2-4    Acceleration       25

 

2-5    Motion with Constant Acceleration  29

 

2-6    Applications of the Equations of Motion   35

 

2-7    Freely Falling Objects           37

 

        Chapter Summary       43

 

        Problem-Solving Summary    45

 

        Conceptual Questions           46

 

        Conceptual Exercises           46

 

        Problems            47

 

 

3       Vectors in Physics               57

 

3-1    Scalars Versus Vectors         58

 

3-2    The Components of a Vector         58

 

3-3    Adding and Subtracting Vectors     63

 

3-4    Unit Vectors        66

 

3-5    Position, Displacement, Velocity, and Acceleration Vectors 67            

3-6    Relative Motion   71

 

Chapter Summary       73

 

Problem-Solving Summary    74

 

Conceptual Questions           74

 

Conceptual Exercises   75

 

Problems    75

 

4       Two-Dimensional Kinematics              81

 

4-1    Motion in Two Dimensions     82

 

4-2    Projectile Motion: Basic Equations  85

 

4-3    Zero Launch Angle       86

 

4-4    General Launch Angle          91

 

4-5    Projective Motion: Key Characteristics    95

 

        Chapter Summary       99

 

        Problem-Solving Summary    101

 

        Conceptual Questions           101

 

        Conceptual Exercises           102

 

        Problems            103

 

 

5       Newton’s Laws of Motion            109

 

5-1    Force and Mass           110

 

5-2    Newton’s First Law of Motion         110

 

5-3    Newton’s Second Law of Motion     112

 

5-4    Newton’s Third Law of Motion                120

 

5-5    The Vector Nature of Forces: Forces in Two Dimensions    123

 

5-6    Weight       126

 

5-7    Normal Forces    130

 

Chapter Summary       134

 

        Problem-Solving Summary    135

 

        Conceptual Questions           135

 

        Conceptual Exercises           137

 

        Problems            138

 

 

6       Applications of Newton’s Laws           143

 

6-1    Frictional Forces          144

 

6-2    Strings and Springs      152

 

6-3    Translational Equilibrium       156

 

6-4    Connected Objects      160

 

6-5    Circular Motion            164

 

        Chapter Summary       169

 

        Problem-Solving Summary    170

 

        Conceptual Questions           170

 

        Conceptual Exercises           171

 

        Problems            172

 

 

7       Work and Kinetic Energy             179

 

7-1    Work Done by a Constant Force     180

 

7-2    Kinetic Energy and the Work-Energy Theorem         186

 

7-3    Work Done by a Variable Force     190

 

7-4    Power        195

 

        Chapter Summary       197

 

        Problem-Solving Summary    198

 

        Conceptual Questions           199

 

        Conceptual Exercises           199

 

        Problems            200

 

 

8       Potential Energy and Conservation of Energy     205

 

8-1    Conservative and Nonconservative Forces       206

 

8-2    Potential Energy and the Work Done by Conservative Forces      209

 

8-3    Conservation of Mechanical Energy                215

 

8-4    Work Done by Nonconservative Forces   223

 

8-5    Potential Energy Curves and Equipotentials      228

 

        Chapter Summary       231

 

        Problem-Solving Summary    232

 

        Conceptual Questions           232

 

        Conceptual Exercises           233

 

        Problems            234

 

 

9       Linear Momentum and Collisions        241

 

9-1    Linear Momentum       242

 

9-2    Momentum and Newton’s Second Law    244

 

9-3    Impulse     245

 

9-4    Conservation of Linear Momentum         249

 

9-5    Inelastic Collisions        254

 

9-6    Elastic Collisions          260

 

9-7    Center of Mass            265

 

*9-8  Systems with Changing Mass: Rocket Propulsion       270

 

        Chapter Summary       272

 

        Problem-Solving Summary    274

 

        Conceptual Questions           274

 

        Conceptual Exercises           275

 

        Problems            276

 

 

10     Rotational Kinematics and Energy               283

 

10-1  Angular Position, Velocity, and Acceleration             284

 

10-2  Rotational Kinematics           288

 

10-3  Connections Between Linear and Rotational Quantities       291

 

10-4  Rolling Motion     296

 

10-5  Rotational Kinetic Energy and the Moment of Inertia         297

 

10-6  Conservation of Energy                301

 

Chapter Summary       306

 

        Problem-Solving Summary    308

 

        Conceptual Questions           309

 

        Conceptual Exercises           309

 

        Problems            310

 

 

11     Rotational Dynamics and Static Equilibrium        317

 

11-1  Torque       318

 

11-2  Torque and Angular Acceleration    321

 

11-3  Zero Torque and Static Equilibrium         325

 

11-4  Center of Mass and Balance  332

 

11-5  Dynamic Applications of Torque     335

 

11-6  Angular Momentum     337

 

11-7  Conservation of Angular Momentum       340

 

11-8  Rotational Work and Power           345

 

*11-9          The Vector Nature of Rotational Motion         346

 

        Chapter Summary       348

 

        Problem-Solving Summary    350

 

        Conceptual Questions           350

 

        Conceptual Exercises           350

 

        Problems            352

 

 

12     Gravity                360

 

12-1  Newton’s Law of Universal Gravitation     361

 

12-2  Gravitational Attraction of Spherical Bodies      364

 

12-3  Kepler’s Laws of Orbital Motion      369

 

12-4 Gravitational Potential Energy        376

 

12-5  Energy Conservation            379

 

*12-6          Tides       386

 

        Chapter Summary       388

 

        Problem-Solving Summary    390

 

        Conceptual Questions           390

 

        Conceptual Exercises           390

 

        Problems            391

 

 

13     Oscillations About Equilibrium            396

 

13-1  Periodic Motion           397

 

13-2  Simple Harmonic Motion       398

 

13-3  Connections Between Uniform Circular Motion and Simple Harmonic Motion          401

 

13-4  The Period of a Mass on a Spring           407

 

13-5  Energy Conservation in Oscillatory Motion       411

 

13-6  The Pendulum             414

 

13-7  Damped Oscillations             420

 

13-8  Driven Oscillations and Resonance          421

 

        Chapter Summary       423

 

        Problem-Solving Summary    425

 

        Conceptual Questions           425

 

        Conceptual Exercises           426

 

        Problems            427

 

 

14     Waves and Sound                433

 

14-1      Types of Waves          434

 

14-2      Waves on a String       436

 

*14-3          Harmonic Wave Functions           439

 

14-4      Sound Waves              440

 

14-5      Sound Intensity           444

 

14-6      The Doppler Effect               449

 

14-7      Superposition and Interference              455

 

14-8      Standing Waves          458

 

14-9      Beats                 466

 

Chapter Summary       468

 

        Problem-Solving Summary    470

 

        Conceptual Questions           470

 

        Conceptual Exercises           470  

 

        Problems    471  

 

 

15         Fluids          479

 

15-1      Density              480

 

15-2      Pressure            480

 

15-3      Static Equilibrium in Fluids: Pressure and Depth        484

 

15-4      Archimedes’ Principle and Buoyancy               489

 

15-5      Applications of Archimedes’ Principle               491

 

15-6      Fluid Flow and Continuity              496

 

15-7      Bernoulli’s Equation              498

 

15-8      Applications of Bernoulli’s Equation         501

 

*15-9          Viscosity and Surface Tension              504

        Chapter Summary       507

 

        Problem-Solving Summary            509

 

        Conceptual Questions           509  

 

        Conceptual Exercises           510  

 

        Problems            511

 

 

PART II  THERMAL PHYSICS

 

16             Temperature and Heat       517

 

16-1      Temperature and the Zeroth Law of Thermodynamics               518

 

16-2      Temperature Scales     519

 

16-3      Thermal Expansion              523

 

16-4      Heat and Mechanical Work            529

 

16-5      Specific Heats             531

 

16-6      Conduction, Convection, and Radiation            534

 

Chapter Summary       542

 

        Problem-Solving Summary            544

 

        Conceptual Questions           544  

 

        Conceptual Exercises           545  

 

        Problems                    546  

 

 

17             Phases and Phase Changes                  551

 

17-1      Ideal Gases                552

 

17-2      Kinetic Theory             558

 

17-3      Solids and Elastic Deformation               563

 

17-4      Phase Equilibrium and Evaporation         568

 

17-5      Latent Heats               574

 

17-6      Phase Changes and Energy Conservation        577

 

Chapter Summary               579

 

        Problem-Solving Summary            581

 

        Conceptual Questions           581

 

        Conceptual Exercises           582

 

        Problems            582

 

 

18             The Laws of Thermodynamics             588

 

18-1      The Zeroth Law of Thermodynamics               589

 

18-2      The First Law of Thermodynamics          589

 

18-3      Thermal Processes               594

 

18-4  Specific Heats for an Ideal Gas: Constant Pressure, Constant Volume  599  

 

18-5      The Second Law of Thermodynamics              603

 

18-6      Heat Engines and the Carnot Cycle         603

 

18-7      Refrigerators, Air Conditioners, and Heat Pumps               607

 

18-8      Entropy              611

 

18-9      Order, Disorder, and Entropy        615

 

18-10   The Third Law of Thermodynamics       617

 

Chapter Summary       618

 

        Problem-Solving Summary            620

 

        Conceptual Questions           620

 

        Conceptual Exercises           621

 

        Problems            622

 

 

 

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