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
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
5 x 10^2
= 500
y=mx+b
m=slope of a line
b= y-intercept
y=1/5x+2
Relationships
Direct
Inverse
Exponential
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
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