Physics

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Physics
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• What is physics anyway?
• Physics is a basic science.
• It is about the nature of basic things such as
  motion, forces, energy, matter, heat, sound and
  light.
• Whereas chemistry is the study of how matter is
  put together and how it combines to form
  compounds, physics is an even more basic science
  because physics helps us understand the forces
  that hold an atom together.
• Learning physics will help you to understand the
  physical world around you.

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• Measurements are an important component of any
  branch of science.
• Mankind has always tried to learn more about the
  world in which he lives.
• From the earliest scientists in 3rd and 4th
  century Greece to the Chinese inventing
  gunpowder, making measurements has been vital to
  understanding the world around us.

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• The size of the Earth was first measured by the
  Egyptian geographer/mathematician Eratosthenes in
  235 BC.
• The size of the sun was first measured by
  Aristarchus at about 240 BC.
• Both of these calculations involved measurements
  and subsequent mathematic calculations.

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• In fact, mathematics is an important part of the
  physics toolbox.
• In the movie Contact, Dr. Araway opines that
  the alien signal received was in the form of
  pulses of prime numbers because mathematics is
  the universal language.
• In fact, scientists the world over use a system
  of measurement called the System International
  (SI), which is also called the metric system

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• The metric system is a series seven base units.
• Copy this list into your notes

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• To convert between SI units, multiply or divide
  by the appropriate power of 10.
• Prefixes are used to change SI units by powers of
  10, as shown in the table below.
• Copy this list into your notes.