# Ch 1: Introductory Physics: Help and Review

### About This Chapter

## Who's It For?

Anyone who needs help learning or mastering introductory physics material will benefit from the lessons in this chapter. There is no faster or easier way to learn introductory physics. Among those who would benefit are:

- Students who have fallen behind in understanding the history of physics and key math skills related to the field
- Students who struggle with learning disabilities or learning differences, including autism and ADHD
- Students who prefer multiple ways of learning science (visual or auditory)
- Students who have missed class time and need to catch up
- Students who need an efficient way to learn about introductory physics
- Students who struggle to understand their teachers
- Students who attend schools without extra science learning resources

## How It Works:

- Find videos in our course that cover what you need to learn or review.
- Press play and watch the video lesson.
- Refer to the video transcripts to reinforce your learning.
- Test your understanding of each lesson with short quizzes.
- Verify you're ready by completing the Introductory Physics chapter exam.

## Why It Works:

**Study Efficiently:**Skip what you know, review what you don't.**Retain What You Learn:**Engaging animations and real-life examples make topics easy to grasp.**Be Ready on Test Day:**Use the Introductory Physics chapter exam to be prepared.**Get Extra Support:**Ask our subject-matter experts any introductory physics question. They're here to help!**Study With Flexibility:**Watch videos on any web-ready device.

## Students Will Review:

This chapter helps students review the concepts in an introductory physics unit of a standard physics course. Topics covered include:

- The branches of physics
- Algebraic and trigonometric math skills
- The International System of Units (SI)
- Units in the metric system
- Unit conversion
- Scientific notation
- Graphs of linear and direct relationships
- Inverse and quadratic relationships

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

Scientists all over the world need to use a common language when reporting the measurements they make, which they do by using the metric system. Explore the metric units for length, mass, volume, density, and temperature, and discover how to make different conversions.

### 2. Unit Conversion and Dimensional Analysis

Dimensional analysis is used in converting different units of measure through the multiplication of a given proportion or conversion factor. Learn how to solve single-step and multi-step problems using dimensional analysis and understand the cancellation of units in a numerator and denominator.

### 3. Significant Figures and Scientific Notation

A significant figure is a number that is necessary to express precise measurements. All non-zero numbers, zeros located between two non-zero numbers, and trailing zeros in numbers with a decimal point are significant figures. Learn about significant figures and how to express calculations in scientific notation.

### Earning College Credit

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### Other Chapters

Other chapters within the Physics 101: Help and Review course

- Vectors: Help and Review
- Kinematics: Help and Review
- Laws of Motion: Help and Review
- Work and Energy in Physics: Help and Review
- Linear Momentum: Help and Review
- Equilibrium and Elasticity: Help and Review
- Sound and Light: Help and Review
- Fluids in Physics: Help and Review
- Laws of Thermodynamics: Help and Review
- Electrostatics: Help and Review
- Circuits in Physics: Help and Review
- The Physics of Magnetism: Help and Review
- Wave Optics: Help and Review
- Classical Relativity: Help and Review
- Modern Physics: Help and Review
- Using Physics Formulas