Читать книгу Physics I For Dummies - Steven Holzner - Страница 25

IN THIS CHAPTER

Mastering measurements (and keeping them straight as you solve equations)

Accounting for significant digits and possible errors

Brushing up on basic algebra and trig concepts

Physics uses observations and measurements to make mental and mathematical models that explain how the world (and everything in it) works. This process is unfamiliar to most people, which is where this chapter comes in.

This chapter covers some basic skills you need for the coming chapters. We cover measurements and scientific notation, give you a refresher on basic algebra and trigonometry, and show you which digits in a number to pay attention to — and which ones to ignore. Continue on to build a physics foundation, solid and unshakable, that you can rely on throughout this book.