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# What are the sub-branches of physics?

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### Quick Answer

There are a large number of sub-branches of physics, but examples include astrophysics, biophysics, electronics, high energy physics and molecular physics. Most scientists become experts in one particular branch, as there is too much knowledge and information in physics as a whole for one person to study it all.

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Particle physics is the study of the very small particles that make up atoms. This branch of physics is closely linked with high energy physics, as small particles can often only be studied by colliding particles at high velocities.

Relativity is a branch of physics that was originally developed by Albert Einstein. In this branch, high speed objects are studied to determine how the universe behaves when moving near the speed of light.

There are a number of branches that are exclusively about studying space. Astronomy, for example, is the general study of the universe and the objects within it. Astrophysics is closely related, but is the study of how the physical properties of materials vary throughout the universe.

Cosmology focuses on how the universe began, and how it has changed as a whole. There are a variety of other branches of physics. Examples include computational physics, fluid dynamics and atomic physics.

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Some examples of MCAT physics equations include the equation for law of gravitation, which is F = Gm1m2/r^2; the equation for centripetal force, which is F=mv^2/r; and the equations for potential energy, such as PE = mgh, PE = 1/2kx^2 and PE = -GmM/r. Other equations include momentum = mv, impulse = Ft and KE = (1/2)mv^2.

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Astrophysics is a subdivision of astronomy concerned with the structures and properties of cosmic objects in the universe. Astrophysics deals with the physical nature of terrestrial bodies and stars rather than their movements and positions in space.

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As of 2014, the title "Father of Physics" has not been given to a single scientist. Isaac Newton, Albert Einstein, Galileo, Thales of Miletus and Aristotle, however, are some of the scientists who are greatly remembered for their noteworthy contributions and are among the great contenders for the title.

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The “ABC of Physics” by Lev Okun is a brief guide to the fundamentals of modern physics. The book is used as guide for beginning physics students to understand the foundations of the subject.

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