Applied Physics
Each day, each of us observes a great variety of objects and
phenomena. Throughout the centuries, the curiosity of the human race has led us
collectively to explore and catalog a tremendous wealth of information. From
the flight of birds to the colors of flowers, from lightning to gravity, from
quarks to galaxy clusters, from the flow of time to the mystery of the creation
of the universe, we have asked questions and gathered enormous sets of facts. As
humans, we make generalizations and look for order. We have discovered that
nature is remarkably cooperative: it shows the underlying order and simplicity
that we value so much.
The law of conservation of energy (which says that energy
can change shape but is never lost) joins issues such as calories from food,
batteries, heat, light and observation springs. Understanding this law makes it
easier to learn about the various forms energy takes and how they relate to
each other. The apparently unrelated topics are connected through physical laws
of wide application, allowing an understanding beyond the memorization of lists
of events.
The unifying aspect of the physical laws and the basic
simplicity of nature form the underlying themes of this text. By learning how
to apply these laws, of course, you will study the most important topics in
physics. More importantly, you will gain analytical skills that will allow you
to apply these laws beyond the scope of what can be included in a single book.
These analytical skills will help you excel academically,
and also help you think critically about any career path you choose to pursue.
This module analyzes the field of physics (to define what physics is), some
applications of physics (to illustrate its relevance to other disciplines) and,
more precisely, what constitutes a physical law (to illustrate the importance
of experimentation for the theory).
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