# Ch 1: Introduction to Physics

### About This Chapter

## Introduction to Physics - Chapter Summary and Learning Objectives

Watch the introduction to physics video lessons to find out what's covered by this branch of science. Instructors can also equip you with the mathematical tools you'll need to study all things concerning matter and energy. This chapter is designed to teach you to the following:

- Units of measurement and conversion factors
- Algebra, trigonometry and calculus basics
- Definition of significant figures
- Graphical representations of experiment variables

Video | Objective |
---|---|

What is Physics? | Defines physics and explains its role and scope. |

Math Review for Physics | Provides a math review of algebra, exponents, trigonometric functions, right triangles, scientific notation and significant figures. |

Elements of the SI: Base and Derived Units | Lists and describes the SI base and derived units, including meter, kilogram, Kelvin, ohm, hertz and mole. |

The Metric System: Units and Conversion | Names the metric units for length, mass, time, volume and density and shows how to report measurements with proper precision. |

Unit Conversion and Dimensional Analysis | Provides conversion factors for converting among various units and common prefixes, such as milli, centi and kilo. |

Significant Figures and Scientific Notation | Shows how to use the correct number of significant figures when making calculations and report answers with the correct scientific notation. |

Linear and Direct Relationships | Describes the binary relationships where changes to one variable result in equal or constant changes to the other. |

Quadratic and Inverse Relationships | Explains the parabolas and hyperbolas used to illustrate nonlinear relationships between two variables. |

### 1. What is Physics? - Definition, History & Branches

Known as the fundamental science, physics creates a foundation for other natural sciences. In this lesson, you'll be introduced to the field of physics, learning about its history and its modern branches of study.

### 2. Math Review for Physics: Algebra

There's quite a lot of algebra you need to know to do physics. Here we'll review some of the concepts needed for rearranging equations, working with polynomials, and working with exponents.

### 3. Math Review for Physics: Trigonometry

This lesson reviews some basic trigonometry that is essential for an introductory physics course. Here we'll focus on the various methods for finding side lengths and angle measurements of a right triangle.

### 4. Elements of the SI: Base & Derived Units

Discover what we mean by SI units. Then explore SI units further by learning about all the base units, and several examples of the derived units that make up the system.

### 5. The Metric System: Units and Conversion

Just like you and your friend communicate using the same language, scientists all over the world need to use the same language when reporting the measurements they make. This language is called the metric system. In this lesson we will cover the metric units for length, mass, volume, density and temperature, and also discuss how to convert among them.

### 6. Unit Conversion and Dimensional Analysis

How is solving a chemistry problem like playing dominoes? Watch this lesson to find out how you can use your domino skills to solve almost any chemistry problem.

### 7. Significant Figures and Scientific Notation

Are 7.5 grams and 7.50 grams the same? How do scientists represent very large and very small quantities? Find out the answers to these questions in this video.

### 8. Linear & Direct Relationships

Learn how to tell when you're dealing with linear and direct relationships and what graphs of these relationships should look like. Then, go further and explore how to interpret the slopes of these graphs.

### 9. Quadratic & Inverse Relationships

Explore how we tell when two variables are in quadratic or inverse relationships in this lesson. Once you understand the basics, we'll go over a couple of examples where these relationships show up in a physics class.

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### Other Chapters

Other chapters within the Physics: High School course

- Vectors in Physics
- Kinematics in Physics
- Newton's Laws in Physics
- Work, Energy, & Power in Physics
- Linear Momentum in Physics
- Circular Motion and Gravitation in Physics
- Physics Lab Experiments: Motion
- Oscillations in Physics
- Waves, Sound, and Light
- Physics Lab Experiments: Matter & Light
- Electrical Forces and Fields in Physics
- Potential and Capacitance in Physics
- Direct Current Circuits in Physics
- Magnetism in Physics
- Physics Lab Experiments: Electricity
- Thermal Physics & Thermodynamics
- Teaching Resources for High School Physics