Physics (Science) is Everywhere
Unit One
We need to hand out the clickers
Science is Everywhere

What are we going
to do in Chemistry
◦ Physical and Chemical
Properties
◦ Solids. Liquids, Gases
◦ Gas Laws
◦ Atomic Structure
◦ Periodic Table
◦ Bonding, Reactions
◦ Acids and Bases

What are we going
to do in Physics
◦
◦
◦
◦
◦
◦
◦
◦
Motion
Velocity, Acceleration
Forces, Newton’s Laws
Fluids
Work and Power
Energy
Electricity
Waves, Light, Color,
Sound
Science is Everywhere
SI units
◦Yes, it’s true, you are going
to be taught metrics
AGAIN.
◦Really, it’s not my fault
◦Gotta know the base units
Science is Everywhere
Science is Everywhere
 Where
did the metric system
come from?
 Why do we teach it every year?
Science is Everywhere
 Based
on what number?
 ___________
 Can
you easily convert??
 YES!
Science is Everywhere
Science is Everywhere
The Prefixes
Kilo ◦ The
Hecto
Deka
Prefixes
Base
Deci
Centi
Milli
1000
1
.1
.01
.001
1/10
1/100
1/1000
100
10
Science is Everywhere

Did you catch the base units from before?
◦ Careful—watch your mass (actual ) base unit
Temp- Length Volume
erature
Mass
Time
Science is Everywhere

Convert 1 kilometer to meters
◦ Watch me do it
Science is Everywhere

Convert 15 grams to milligrams
◦ Watch me do it
Science is Everywhere

Convert 25 centiliters to hectoliters
◦ Watch me do it
Science is Everywhere
Now you do it.
 Grab your clicker and let’s go!

2 hectacres to acres
200
0.1
2) 1500 meters to kilometers
1.5
0.1
5.79 meters to centimeters
579
0.1
4892 milligrams to grams
4.892
0.1
6.1 kiloliters to liters
6100
0.1
Science is Everywhere
Base
units and derived units
◦What’s the difference
Science is Everywhere
 Factor
label for conversions
(dimensional analysis)
◦ Have you seen this before??
◦ 10 dollars into quarters
Science is Everywhere
Still
easy, doing something
you know…
250 meters into kilometers
(using factor label method)
Science is Everywhere
Minutes
in a year?
Science is Everywhere
30
m/s to km/hr?
Science is Everywhere
Grab
your clicker……
Now you do the next one
36 g/ml to kg/l
36
0.1
100 km/hr to m/s
27.78
0.1
I have a good grasp on converting?
A.
B.
C.
D.
E.
Strongly Agree
Agree
Neutral
Disagree
Strongly Disagree
Science is Everywhere
Best way to organize data?
◦ This is for all you “visual”
people!
Science is Everywhere
Graphing
◦Bar
◦Pie
◦Line
Science is Everywhere
Graphing
◦Bar, what does it show?
Science is Everywhere
Graphing
◦Pie, why use here?
Science is Everywhere
Graphing
◦The popular line graph
You Got Skills?
Ah, the
line graph!!
◦X-axis
◦Y-axis
◦Dependent variable
◦Independent variable
Science is Everywhere
speed (m/s)
distance
(cm)
1st
2nd
3rd
average
speed
(m/s)
10.1
1.1
1.1
1.2
1.13
20.3
1.5
1.7
1.6
1.60
29.7
1.9
2.0
1.9
1.93
40.0
2.2
2.4
2.2
2.27
50.2
2.5
2.5
2.5
2.50
59.8
2.8
2.8
2.6
2.73
70.4
3.1
3.0
2.9
3.00
80.1
3.1
3.2
3.2
3.17
91.0
3.2
3.5
3.3
3.33
99.6
3.5
3.5
3.7
3.57
Science is Everywhere
Science is Everywhere
 Slope
of the line?
◦ How do we find it?
Science is Everywhere
 Remember
the Scientific
Method??
◦ Yeah, yeah, moving on (three
more slides and it will return)
 Using
models
◦ Draw me a picture
 More on this to come…..
You Got Skills?
Let’s See!!
You Got Skills?
Science
begins with
curiosity and often ends
with discovery
◦ Many items are discovered by
mistake
You Got Skills?
Scientific
Method
◦ Observations
◦ Hypothesis
◦ Test hypothesis (revise if needed)
◦ Conclusions
◦ Theory
◦ Law
You Got Skills?
 Hypothesis
 Theory
 Law
You Got Skills?
Using
models
◦What is a model?
◦Is it really complicated??
◦Does it need to be some
complicated thing?
You Got Skills?
Scientific
notation
◦Why would you want to
do this??
◦How often am I really
going to need this?
You got Skills?

Scientific Notation examples…..
You got Skills?

How to put it in my calculator?
It’s above the number 7

6.02 2nd EE 23
= 6.02 x 1023
You Got Skills?
Significant
Figures
◦Not that significant
◦Mostly used in chemistry
◦Must be aware, online
homework answers use
six digit rule
You Got Skills?
Finding Area
◦length x width
◦Squared unit (cm2, m2)
◦Units must match!
You Got Skills?
Finding Volume
◦length x width x height
◦Squared unit (cm3, m3)
◦Units must still match!
You Got Skills?
Try
these example
problems.
Note: Now we will be
timed for each question
Find the area of a
rectangle that is 20 cm on
one side by 30 cm on the
other.
600
0.1
Find the area of a polygon
that is 13 cm on one side
and 7 cm on the other
91
0.1
This particular polygon is
90 cm on one side and
1.2 m on the other.
10800
0.1
What is the volume of a
regular solid that is 10
cm x 5 cm x15 cm?
750
0.1
Last one of these.
What is the volume of
a 25 cm cube?
15625
0.1
You Got Skills?
 What
happens if you don’t
have a regular solid?
◦ Means you can’t measure
lxwxh
◦ What could you do
You Got Skills?
 Volume by displacement
◦ Place in a graduated cylinder filled
with water
◦ Measure the change in volume
You Got Skills?
 “How
can I use this to find
density” you ask…..
◦ What a great question
You Got Skills?
You Got Skills?
D=
m=
v=
Watch your units
You Got Skills?
If I gave you a rock, a
graduated cylinder, water, a
scale, and a ruler, how could
you tell me the density of
the rock?
(Put your hand down Jordi and give someone else a chance to answer)
You Got Skills?
Go back now and pick up
Scientific method and
scientific notation.