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tiL12214_fm_i-xx.indd Page vi 25/10/10 8:58 AM user-f463 Volume/207/MHDQ243/tiL12214_disk1of1/0073512214/tiL12214_pagefiles
CONTENTS
Preface xii Key Terms 56
PHYSICS
Applying the Concepts 56
Questions for Thought 59
1 What Is Science? 1 2 Motion 25 For Further Analysis 59
Invitation to Inquiry 59
Parallel Exercises 59
3 Energy 61
1.1 Objects and Properties 2 2.1 Describing Motion 26
1.2 Quantifying Properties 3 2.2 Measuring Motion 27
1.3 Measurement Systems 4 Speed 27
1.4 Standard Units for the Velocity 29
Metric System 5 Acceleration 29 3.1 Work 62
Length 5 Science and Society:
Units of Work 62
Mass 5 Transportation and A Closer Look: Simple
Time 6 the Environment 31
Machines 64
1.5 Metric Prefixes 6 Forces 32 Power 64
1.6 Understandings from 2.3 Horizontal Motion on Land 34
3.2 Motion, Position, and Energy 67
Measurements 7 2.4 Falling Objects 35 Potential Energy 67
Data 7 A Closer Look: A Bicycle
Kinetic Energy 68
Ratios and Racer’s Edge 37 3.3 Energy Flow 69
Generalizations 7 2.5 Compound Motion 38
Work and Energy 69
The Density Ratio 8 Vertical Projectiles 38 Energy Forms 70
Symbols and Equations 10 Horizontal Projectiles 38
Energy Conversion 71
How to Solve Problems 11 A Closer Look: Free Fall 39 Energy Conservation 74
1.7 The Nature of Science 13 2.6 Three Laws of Motion 40
Energy Transfer 74
The Scientific Method 14 Newton’s First Law 3.4 Energy Sources Today 74
Explanations and of Motion 41
Science and Society:
Investigations 14 Newton’s Second Law Grow Your Own Fuel? 75
Science and Society: Basic of Motion 41
Petroleum 75
and Applied Research 15 Weight and Mass 43 Coal 75
Laws and Principles 17 Newton’s Third Law
People Behind the Science:
Models and Theories 17 of Motion 44 James Prescott Joule 76
Summary 19 2.7 Momentum 46
Moving Water 76
People Behind the Science: Conservation of Nuclear 77
Florence Bascom 20 Momentum 46
Conserving Energy 77
Key Terms 21 Impulse 48 3.5 Energy Sources Tomorrow 78
Applying the Concepts 21 2.8 Forces and Circular Motion 48
Solar Technologies 78
Questions for Thought 23 2.9 Newton’s Law Geothermal Energy 79
For Further Analysis 24 of Gravitation 49
Hydrogen 80
Invitation to Inquiry 24 Earth Satellites 52 Summary 80
Parallel Exercises 24 A Closer Look: Gravity
Key Terms 81
Problems 53
Applying the Concepts 81
Weightlessness 53
Questions for Thought 83
People Behind the Science:
For Further Analysis 83
Isaac Newton 54
Invitation to Inquiry 83
Summary 55
Parallel Exercises 83
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