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Essential Questions

- What is Physics?
- Why do scientists use the metric system, instead of the English or some other system?

Now, you measure the length and width of your table only using your hands and or feet or some other means.

- Write down your results so we can go over them as a class.
- Compare your results with the grop next to you.
- How difficult is it to compare your results with all of these different unit systems?

The study of motion and what causes motion.

Mechanics:

The study of heat and temperature.

Thermodynamics:

The study of specific types

respective motions.

Waves and Vibrations:

The study of electricity, magnetism

and light.

Electromagnetism:

Relativity:

The study of particles moving at any speed.

The study of the behavior of

submicroscopic particles.

Quantum mechanics:

1. Make observations and collect data that lead to a question.

2. Formulate and objectively test hypotheses by experiments.

Hypotheses: A reasonable explanation for observations – one

that can be tested with additional experiments.

3. Interpret results, and revise the hypothesis if necessary.

4. State a conclusions in a form that can be evaluated by others.

Controlled experiment: A experiment involving the manipulation

of a single variable or factor.

Length: meters ( m )

Time: seconds ( s )

Speed: meters per seconds ( m/s )

Acceleration: meters per second squared ( m/s2 )

Mass: Kilograms ( kg )

Abbreviation

Value

Tera

T

1012

Giga

G

109

Mega

M

106

Kilo

k

103

Hecto

h

102

Deka

da

101

Deci

d

10-1

Centi

c

10-2

Milli

m

10-3

Micro

µ

10-6

Nano

n

10-9

Pico

p

10-12

Femto

f

10-15

Metric Multipliers

1 km = 1000 m = 100,000 cm = 1,000,000 mm

1 m = 0.001 km = 100 cm = 1000 mm

1 cm = 0.00001 km = 0.01 m = 10 mm

1 mm = 0.000001 km = 0.001 m = 0.1 cm

Time Conversions:

1 year = 365 days = 8760 hr = 5.256 x 105 min 1 day = 24 hr = 1440 min = 8.64 x 104 s

1 hr = 60 min = 3600 s

1 min = 60 s

Mass Conversions:

1 kg = 1000 gm = 1,000,000 mg

1 gm = 1000 mg = 0.001 kg

1 mg = 0.001 gm = 0.00001 k

1. Zeros between other nonzero digits are significant.

50.3 m, has 3 significant digits.

2. Zeros in front of nonzero digits are not significant.

0.0008 ms, has one significant digit.

- Zero that are at the end of a number and also to the
- right of the decimal are significant.

57.00, has 4 significant digits.

- Zeros at the end of a number but not to the left of a
- decimal are significant. But we will not treat them as
- significant.

20, has one significant digit.

85 cm

1 m

1 min

= 1.4 x 10-2 m/s

60 s

102 cm

min

Convert 50g to kg.

50 g

1 kg

= 0.05 kg

103 g

5.4 x 10-2 m or 0.054 m

Convert 3.5 kg to g

3.5 x 103 g

Convert 105 km/h to m/s

29.2 m/s

What is Physics?

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