Fundamental physics concepts Fundamental physics concepts Causality describes the relationship between causes and effects, and is fundamental to all natural science, especially physics. It is also studied from the perspectives of philosophy, computer science, and statistics. ...more on Wikipedia about "Causality (physics)"
The characteristic time of a system is the time it takes for the system to undergo a specific change. ...more on Wikipedia about "Characteristic time"
A clockwise motion is one that proceeds 'like the clock's hands': from the top to the right, then down and then to the left, and back to the top. In a mathematical sense, a circle defined parametrically by the equations x = r sin t and y = r cos t, where r is the radius of the circle, is traced clockwise as t increases in value. The opposite sense of rotation is anti-clockwise ( UK) or counterclockwise ( U.S.). ...more on Wikipedia about "Clockwise and counterclockwise"
An Isolated system, is a physical system that does not interact with its surroundings. It obeys a number of conservation laws: its total energy and mass stay constant. They cannot enter or exit, but can only move around inside. An example is in the study of spacetime, where it is assumed that asymptotically flat spacetimes exist. ...more on Wikipedia about "Closed system"
In mechanics, for each particle belonging to a system, and for each independent direction in which movement is possible, two degrees of freedom, are defined, one describing the particle's momentum in that direction, the other describing the particle's position along an axis defined by that direction. ...more on Wikipedia about "Degrees of freedom (physics and chemistry)"
Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. The higher an object's density, the higher its mass per volume. The average density of an object equals its total mass divided by its total volume. A denser object (such as iron) will have less volume than an equal mass of some less dense substance (such as water). ...more on Wikipedia about "Density"
Electric charge is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interactions. Electrically charged matter is influenced by, and produces, electromagnetic fields. The interaction between charge and field is the source of one of the four fundamental forces, the electromagnetic force. ...more on Wikipedia about "Electric charge"
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Energy is a measure of being able to do mechanical work. It is a fundamental concept pertaining to the ability for action. In physics, it is a quantity that every physical system possesses. This quantity is not absolute but relative to a state of the system known as its reference state or reference level. The energy of a physical system is defined as the amount of mechanical work that the system can produce if it changes its state to its reference state; for example if a liter of water cools down to 0 °C or if a car hits a tree and decelerates from 120 km/h to 0 km/h. ...more on Wikipedia about "Energy"
In physics, a free particle is a particle that, in some sense, is not bound. In the classical case, this is represented with the particle not being influenced by any external force. ...more on Wikipedia about "Free particle"
In physics, length scale is a particular length or distance determined with the precision of one order (or a few orders) of magnitude. The concept of length scale is particularly important because physical phenomena of different length scales can not affect each other and are said to decouple. The decoupling of different length scales makes it possible to have a self-consistent theory that only describes the relevant length scales for a given problem. Scientific reductionism says that the physical laws on the shortest length scales can be used to derive the effective description at larger length scales. ...more on Wikipedia about "Length scale"
Macroscopic is commonly used to describe physical objects that are measurable and observable by the naked eye. When applied to phenomena and abstract objects, it describes existence in the world as we perceive it. Lengths scales generally considered macroscopic roughly fall in the range 1 mm - 1 km. ...more on Wikipedia about "Macroscopic"
In physics, momentum is the product of the mass and velocity of an object. ...more on Wikipedia about "Momentum"
In physics, a parity transformation (also called parity inversion) is the simultaneous flip in the sign of all spatial coordinates: ...more on Wikipedia about "Parity (physics)"
In physics, a physical body is an object which can be described by the theories of classical mechanics, or quantum mechanics, and experimented upon by physical instruments. This includes the determination of position, and in some cases the orientation in space, as well as means to change these, by exerting forces. ...more on Wikipedia about "Physical body" Enjoy shortopedia. shortopedia
In physics, quantization is a procedure for constructing a quantum field theory starting from a classical field theory. This is a generalization of the procedure for building quantum mechanics from classical mechanics. One also speaks of field quantization, as in the "quantization of the electromagnetic field", where one refers to photons as field "quanta" (for instance as light quanta). This procedure is basic to theories of particle physics, nuclear physics, condensed matter physics, and quantum optics. ...more on Wikipedia about "Quantization (physics)"
In mathematics, physics, and computing, a scalar is a quantity usually characterized by a single numeric value or not involving the concept of direction. The term is often used in contrast to entities that are "composites" of many values, like vector, matrix, tensor, sequence, etc.. The first recorded usage of the term was by W. R. Hamilton in 1846. ...more on Wikipedia about "Scalar"
In physics, a scalar is a simple physical quantity that does not depend on direction, and therefore does not depend on the choice of a coordinate system. ...more on Wikipedia about "Scalar (physics)"
In physics, spacetime is a model that combines 3-D space and 1-D time into a single construct called the space-time continuum. According to Euclidean space perception, our universe has three dimensions of space, and one dimension of time. By combining the two concepts into a single manifold, physicists are able to deal in a unitary way with solutions which attempt to explain the workings of the universe at both supergalactic and subatomic levels. There might be an endless number of dimensions, though 4-D space-time is as far as modern-day scientists know. ...more on Wikipedia about "Spacetime"
In mathematics, a tensor is a generalized 'quantity' or a certain kind of geometrical entity that includes all the ideas of scalars, vectors, matrices and linear operators. Tensors may be written down in terms of coordinate systems, as arrays of scalars, but are defined so as to be independent of any chosen frame of reference. ...more on Wikipedia about "Tensor"
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