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					Intro to Physics
Mrs. Coyle


Physics is the study of the physical world
including motion, energy, light, electricity,
          magnetism, sound etc.
                                       Golden Gate Bridge


     Physics
   Mechanics
       Kinematics (motion)
       Statics, Dynamics (forces)
   Electricity
   Magnetism
   Waves
   Optics (geometric optics)
   Nuclear Physics (Modern Physics)
       Physics
   The most basic
    science.
   The foundation of
    other sciences

                 What?
                 Why?
                 How?
                 When?
     Aristotle (Greek 4th Century BC)


   Logic
   Studied motion
       Natural and violent motion
       4 elements:
         earth, water, air, fire
   Geocentric view
   Aristarchos(310-230 BC),
    disagreed and believed in
    heliocentric view.
      Democritus


   Greek who devised the
    first atomic theory.
       Galileo Galilei (1564 AD)

   Father of the scientific
    method (along with the
    Englishman Francis
    Bacon 1500’s).
   Studied motion.
   Agreed with the Greek
    Aristarchos and Polish
    Copernicus (1473-1543)
    on heliocentric view
    point. This lead to his
    house arrest.
Isaac Newton
    English (1642-1727) related force and
     motion and studied light.
    A Glance at Some Scientists who
Studied Electricity and Magnetism

   American Benjamin Franklin (1706-
    1790), experimented with electricity.
   Michael Faraday (1791-1867), English
    with a grammar school education,
    found that a moving magnet induces
    electric current to flow.
      The BIG Guy


   Albert Einstein (1879-1955)
   Relativity: there is no absolute
    frame of reference that is at
    rest.
   Photoelectric effect (Light is
    quantized) (Nobel Prize)
   Related mass and energy
    E=mc2
The Scientific Method


   Steps followed during scientific
    investigations.
Scientific Method
   Recognize a problem
   Hypothesis- educated guess, testable
       When tested and confirmed becomes a law
   Observation -measurement, data
    collection (experiment)
   Theory – information including tested
    hypothesis
   Conclusion
Law or Principle

   A hypothesis that has been repeatedly
    tested and not contradicted.

   Laws change or are abandoned when
    contradicted.
Scientific Fact
   Observation
   May change
Science and Technology


   Science    Pure
   Technology  Applied
Math and Units
   Math- the language of Physics
   Units      SI – International System
       Basic Units    MKS
            Meter m
            Mass kg
            Time s
   National Bureau of Standards
   Prefixes

				
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posted:4/22/2012
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