# Chapter 1:

### Nature of Physics

## Ch. 1 Learning Targets:

I can: estimate values using metric measurements

identify variables in an experiment

determine the relationship between variables from data or a graph

construct a high quality graph from a set of data

values using scientific notation

calculate and express values in the proper amount of significant figures

derive a literal equation for any variable

calculate and express the slope of a line

## Vocabulary

**dependent variable**: a variable whose value depends on that of another

**independent variable**: a variable whose value does not depend on another

**-relationships**

**direct**: the variables do the same thing

**inverse**: an increase in one variable causes the decrease of the other

**linear: **the variables do the same thing

**significant figure:**the number of important single digits in the coefficent of an expression

**accuracy**:the extent to which a given measurement agrees with the standard value for the measurement

**precision**:the quality, condition, or fact of being true

## Practice Problem 1

**Given:** change in time=5.2 s

V=340 m/s

change in x=?

**Solve:** v= change in x/change in time

5.2 x 340= (change in x/ 5.2) x 5.2

5.2 x 340= change in x

1,768= change in x x 2

change in x= 884m

## Practice Problem 8

**Given: **t=101.4s

**Solve:** v= change in x/ change in time

change in time= change in x/velocity= 2000/20

change in time=100s

- v=change in x/ change in time

v = 1,429 m/s

## Formulas

__S.N x 10^n__5 x 10^2

= 500

__y=mx+b__

m=slope of a line

b= y-intercept

y=1/5x+2

## Relationships

## Unit Questions

- 1m=100cm, 1cm=100mm
- if you had to pay $2.00 every time you came into the school, the amount of times you come into the school is the independent variable and the amount of money you pay is the dependent variable
- scientific notation: 5.6x10^-9 = 0.0000000056.

## Main Ideas

__Nature of Science:__key principles and ideas which provide a description of science as a way of knowing, as well as characteristics of scientific knowledge

__Process of Testing a Hypothesis:__ you use scientific method which is a 5 step procedure that gives you the end results

__The RelationshipBetween Variables in an Experiment:__ the independent variable is what you change and the dependent variable is the result of the change. They interact because one depends on the other