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Physics is the study of the physical world, ranging from subatomic
domains to the structure of the universe as a whole. The goal of
physics is to understand how the natural world operates, and to
apply that understanding to further discovery and invention. Physics
is the most basic of the natural sciences, and is used by the other
sciences (such as chemistry, biology, geology, astronomy, and
meteorology, which all apply physics). Life sciences use physical
principles as well (for example, the understanding of the circulation
system requires the understanding of fluid dynamics). Many
technologies are direct applications of physics. Workers in heating,
ventilation, and refrigeration technologies must understand
thermodynamics and the behavior of fluids. Civil engineers,
who design roads, bridges, and dams, require an understanding
of the equilibrium of forces. Physicists were involved in the inventions
of so many of the gadgets we use every day, from the refrigerator
in our kitchens to the cell phones in our pockets.
View some you-tube physics here and here.



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