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Acceleration
In physics or physical
science, acceleration
(symbol: a) is defined as
the rate of change (or
derivative with respect to
time) of velocity. It is
thus a vector quantity with
dimension length/time².
... > full story
Gravitation
Gravity is a force of
attraction that acts between
bodies that have mass.
Gravity is the reason for
the very existence of the
earth, the sun and other
celestial bodies; without it
matter would not have
... > full story
Mechanics
Mechanics can be seen as the
prime, and even as the
original, discipline of
physics. It is a huge body
of knowledge about the
natural world. It also
constitutes a central part
of technology. ... > full story
General relativity
General relativity (GR) is
the geometrical theory of
gravitation published by
Albert Einstein in 1915. It
unifies special relativity
and Sir Isaac Newton's law
of universal gravitation
with the insight that
... > full story
Browse Reference Articles
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Electromagnetism
Electromagnetism is the physics of the electromagnetic field: a field, encompassing all of space, which exerts a force on those particles that possess the property of electric charge, and is in turn ... > more -
Kinetic energy
Kinetic energy is energy that a body possess as a result of its motion. Kinetic energy as it is mathematically written is the "classic statement" of: Kinetic energy is equal to half the mass of an ... > more -
Physical cosmology
Physical cosmology, as a branch of astrophysics, is the study of the large-scale structure of the universe and is concerned with fundamental questions about its formation and evolution. Cosmology ... > more -
List of phases of matter
This is a list of the different phases of matter including the more exotic ones. Generally phases of matter are distinguished by the pressure and temperature, transforming into other phases as ... > more -
Potential energy
Potential energy is stored energy. Potential energy is the energy that exists by virtue of the relative positions (configurations) of the objects within a physical system. This form of energy has the ... > more -
Wave-particle duality
In physics and chemistry, wave-particle duality holds that light and matter exhibit properties of both waves and of particles. A central concept of quantum mechanics, duality addresses the inadequacy ... > more -
Special relativity
Special relativity inter-relates space and time in such a way that the speed of light is constant, and the theory leads to situations where two observers can disagree over time intervals and ... > more
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