PHYSICS
Introduction
   PHYSICS is originated from a Greek word Physis or fusis, meaning nature or natural things.
   It is the study of nature and its laws. In other words, it is the study of matter and energy.
   Physics explains natural phenomena in the universe, it"s often considered to be the most
    fundamental science.
   It provides a basis for all other sciences - without physics, you couldn"t have biology, chemistry,
    or anything else!
   Emphasis within physics is centered on energy and force and defining the laws of nature which
    govern how our universe behaves.
Major Branches of Physics
   Acoustics is the study of production and properties of sound.
   Astronomy is the study of celestial objects.
   Atomic Physics is the study of structure and properties of an atom.
   Biophysics applies the approaches and methods of physics to study biological systems.
   Cryogenics is the study of matters in very low-temperature.
   Electromagnetism is the study of the electromagnetic force.
   Electrodynamics is the study of rapidly changing electric and magnetic fields.
   Fluid Dynamics deals with movement of liquid and gases.
   Mechanics deals with behaviour of object and system to various forces.
   Meteorology is the study of the atmosphere.
   Nuclear/ Modem Physics is concerned with structure and properties of atomic nucleus and their
    reactions.
   Optical sciences is the study of the properties and behavior of light along with the interactions of
    light, matter and energy.
   Thermodynamics is the study of how heat relates to work and energy.
                               UNIT OF MEASUREMENT
Unit                                                      Types of Units
Unit is the standardised quantity of a physical                The units of fundamental physical
property, used as a factor to express occurring                 quantities are called fundamental units.
quantities of that property.                                    They are length, mass and time. They are
                                                                independent of one another.
                                                               Units of physical quantities can be
                                                                expressed in terms of fundamental units
                                                                and such units are called derived units,
                                                                like area, velocity, etc.
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