Physics Lord

3.       The exponent must be a positive or negative integers

Note:

                LARGE NUMBER  are written with positive exponent

-          Slowly being replaced by the metric system

-          First developed in France during the late 18^th century

-          Use prefixes to indicate different power of 10

-          Its unit are called SI unit from its acronym in French “Systeme International d Unites”

SI BASE UNIT

·         FUNDAMENTAL UNITS were other units are derived

Other:

Velocity  =  m/s

Acceleration = m/s²

Special SI Unit:

        Force  = N or kg m/s²  (Newton)

       Energy/Work  = N-m  (Joule)

       Power   =  J/s  = (Watt)

Those number that are known exactly

Example:

   No of count noun

  3 ballpen,  10 student, 15 teachers

2.       Inexact numbers

Those numbers whose value has some uncertainty

Ø  Number obtained by measurement

Ø  Very large number even if they represent count noun

o   No, of voters in the Philippines

4.       Zeroes at the right end of the number and the right place of the decimal are significant

7.       Zeroes at the right end of the number and left of decimal place may or may not be significant. To remove the ambiguity, write the number in scientific notation

CONVERSION

STEPS IN CONVERTING UNITS

1.       Determine which units must be replaced and what unit will replace it

2.       Write the unit equivalence in fractional form

cm³   to m³ 

Given:  8.0  x 10⁶ cm³  

      =   8.0 m³

4. Convert     7.4 m³  to L

-          Systematized body of knowledge base on facts

-          Discipline or field of study to provide natural explanation on natural phenomena

-          Measurable results of the laws of the physical universe

-          Focus on proper deductive and inductive analysis

-          Analysing numerical data

-          Ex Algebra, Trigonometry, Geometry, Calculus, Statistics

b.      Natural Science

-          Study of nature or the universe

a.       Physical Science

·         Study of matter and energy and other physical entities

·         Physics, chemistry, geology and astronomy

b.      Biological Science

·         Study of living things

·         Ex. Botany, zoology and microbiology

c.       Social Science

-          Study of human minds and human interactions

a.       Statics – mechanics of bodies at rest

b.      Dynamics – mechanics of bodies in motion

c.       Fluid Mechanics – deals with the motion of liquids and gases

b.      Thermodynamics – temperature and heat energy

c.       Acoustics – study of sound, its properties and how it is produced and transmitted

d.      Electrodynamics – electricity and magnetism and the relationship between them

e.      Optics – study of light

a.       Physical Optics – nature of light and physical processes involving its production, transmission and absorption

b.      Geometrical Optics – the study of how light travels and how the direction of travel is affected by different material such as mirror and lenses.

   

b.      Atomic Physics – study of the structure, properties and behaviour of an atom

c.       Molecular Physics – study of the structure, properties and behaviour of a molecules

d.      Nuclear Physics – examine the structure and properties of the atomic nucleus, as well as nuclear reactions and their applications.

e.      High-energy Physics – also called particle physics. It is the study of behaviour of elementary particles that make-up proton, neutron, and other subatomic particles.

f.        Solid State Physics – also called condensed matter physics. Study of physical properties of solid materials, the behaviour of electrons and nuclei in it and how they react with each other.

g.       Plasma Physics – study of properties and behaviour of highly ionized gases called plasma.

2.       Organizing Data – gathering information about the phenomenon. Information may come from the books and journals in the library, from the internet, by asking people knowledgeable about it.

3.       Formulating Hypothesis – This is where one will formulate tentative explanations. To explain the phenomenon. The explanation should be natural and based on facts.

4.       Prediction – a statement of what might happened if on tries to control the variables affecting the phenomenon.

5.       Experimentation – This is where the hypothesis is tested by controlling some of the variables affecting he phenomenon. The experiment design is based on the predictions made and the experiment should take all possible variables into considerations.

6.       Conclusion – summary of the experimental experiment and how it matches the hypothesis made. Note that the conclusion is mere a statement relating to hypothesis to the conclusion. Depending on the results, one may either reject or not reject the hypothesis.

One cannot prove a hypothesis with just one experiment. It is possible that one made a mistake somewhere along the experiment. A hypothesis that is already proven become a theory, and to become a theory, a hypothesis must be subjected to several experiments with few or several modifications from the original experiments.

2.       Today I noticed that there are many ants crawling under the table. They weren’t there last night. How can I apply the scientific method

3.       I charged my cellphone overnight and when I tried to open it hte following day, it wasn’t working. How can I apply the scientific method.

-          Used to predict the outcome of a phenomenon and shows mathematical consistencies

-          Contradicted by several other experiments

-          Experimentally proven on several occasion