1. Welcome to Physics

2. Introduction to Physics
INTRO1A.MOV
INTRO2A.MOV

3. Physics – the study of the properties and interrelationships of matter and energy.
Relationships to explain and predict natural phenomena.
Mathematics is the language of physics.
Physicists are seeking how to explain all phenomena of our universe.

4. Branches of Physics

6. Petals Around the Rose
Can you form a hypothesis?
Rules :

7. Petals Around the Rose

8. Petals Around the Rose

9. Petals Around the Rose

10. Petals Around the Rose

11. Petals Around the Rose

12. Petals Around the Rose

13. Petals Around the Rose

14. Petals Around the Rose

15. Problem Solving
Strategies used by scientists and engineers to solve problems:
List possible solutions
Look for patterns
Make a table or graph
Make a model – visual display of ideas
Trial and error (guess and check)
Work backwards
Solve a simpler or similar problem
Scientific Method

17. Scientific Method
Make observations and then State the Problem in specific terms
Form a hypothesis
Conduct an experiment
Independent Variable - you manipulate
Dependent Variable - Outcome/result
Control Experiment - used for comparison, normal conditions
Constants - items that remain the same

18. Collect data and make observations
Analyze data - make graphs
Make a conclusion
Scientific Law - rule of nature
Theory - an explanation based on observations and experiments
Escalator failure.mp4

19. Measurement Units

21. Fundamental Units – basic measurements
Time - Unit of time is second
Defined by the frequency of radiation released from cesium-133

23. Length - Unit of length is meter
Defined by the distance light travels in a vacuum in 1/299,792,458 second.
Perimeter – add the sides of the rectangle
Circumference = 2r(radius), m

24. Mass - Unit of mass is kilogram
Defined by a metal cylinder kept in France.

25. Derived Units – combination of two or more of the fundamental units.
Area –
Rectangle/square - length x width = m x m = m2
Circle – r2
Volume –
Cube - length x width x height = m x m x m = m3
Sphere -

27. Density – mass per unit volume
 =
Density of water =

28. Prefixes

29. Giga G 109
Mega M 106
Kilo K 103 (1000)
Centi c 10-2 (0.01 or )
Milli m 10-3 (0.001 or )
Micro  10-6
Nano n 10-9
Pico p 10-12

30. Powers of ten.ppt

31. 10-12 boos?
10-6 phone?
101 cards
2 x 103 Mocking Birds?
10-3 peeds?
106 phone?

32. Convert by substitution
1 km = 1 x 103 m = 1000 m
25 nm = 25 x 10-9 m
3.5 x 107 m = 35 x 106 m = 35 Mm
32 x 1010 bytes = 32 x 10 x 109 bytes = Gbytes

33. Convert by Factor Label

34. Scientific Notation

35. A way to write very, very large or very, very small numbers.
A number with a digit between 1 and 9, inclusive, and an exponent.
As the decimal moves left, the exponent becomes more positive.

36. As the decimal moves to the right, the exponent becomes more negative.

37. 2,000 m = 2 x 103m
0.002 m = 2 x 10-3m
.021 m =
m =
0.040 m =
0.122 m =
2.1 x 10-2 m
x 107 m
4.0 x 10-2 m
1.22 x 10-1 m

38. Add/Subtract – Exponents must be the same.
(2.30 x 102m) + (2.30 x 103m) =
(5.1 x 10-2m) + (6.2 x 10-1m) =
(2.5 x 103m) – (1.2 x 102m) =
2.53 x 103m
6.7 x 10-1m
2.4 x 103 m

39. Multiply – add exponents
(2.0 x 102m) x (2.0 x 103m) =
(2.0 x 10-2m) x (2.0 x 103m) =
4.0 x 105 m2
4.0 x 101 m2

40. 5.0 x 101 g/mL
1.5 x 10-1 g/mL
Divide – Subtract exponents
(1.0 x 10-2g) ÷ (2.0 x 10-4mL) =
(3.0 x 103g) ÷ (2.0 x 104mL) =

41. Homework – Introduction to Physics