Continuum mechanics is a branch of physics (specifically mechanics) that deals with continuous matter, including both solids and fluids (i.e., liquids and gases). The fact that matter is made of atoms and that it commonly has some sort of heterogeneous microstructure is ignored in the simplifying approximation that physical quantities, such as energy and momentum, can be handled in the infinitesimal limit. Differential equations can thus be employed in solving problems in continuum mechanics. Some of these differential e ...

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Including:

Classical mechanics - Description of the theory
Classical mechanics - Position and its derivatives Classical mechanics - Forces; Newton's second law Classical mechanics - Energy Classical mechanics - Beyond Newton's Laws Classical mechanics - Classical transformations
Classical mechanics - History Classical mechanics - Limits of validity
Classical mechanics - The classical approximation to special relativity Classical mechanics - The classical approximation to quantum mechanics
Classical mechanics - Notes

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Quantum mechanics is a fundamental physical theory that replaces Newtonian mechanics and classical electromagnetism at the atomic and subatomic levels and is the underlying framework of many fields of physics and chemistry, including condensed matter physics, quantum chemistry, and particle physics. Along with general relativity, it is one of the pillars of modern physics. Quantum mechanics - Introduction. The term quantum (Latin, "how much") refers to the discrete units that the theory assign ...

Including:

Quantum mechanics - Introduction Quantum mechanics - Description of the theory
Quantum mechanics - Mathematical formulation Quantum mechanics - Interactions with other scientific theories
Quantum mechanics - Applications of quantum theory Quantum mechanics - Philosophical consequences Quantum mechanics - History
Quantum mechanics - Founding experiments
Quantum mechanics - Notes

Read more here: » Quantum mechanics: Encyclopedia - Quantum mechanics

Quantum mechanics is a fundamental physical theory that replaces Newtonian mechanics and classical electromagnetism at the atomic and subatomic levels and is the underlying framework of many fields of physics and chemistry, including condensed matter physics, quantum chemistry, and particle physics. Along with general relativity, it is one of the pillars of modern physics. Quantum mechanics - Introduction. The term quantum (Latin, "how much") refers to the discrete units that the theory assign ...

Including:

Quantum mechanics - Introduction Quantum mechanics - Description of the theory
Quantum mechanics - Quantum mechanical effects Quantum mechanics - Mathematical formulation Quantum mechanics - Interactions with other scientific theories
Quantum mechanics - Applications of quantum theory Quantum mechanics - Philosophical consequences Quantum mechanics - History
Quantum mechanics - Founding experiments
Quantum mechanics - Notes

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Celestial mechanics is a division of astronomy dealing with the motions and gravitational effects of celestial objects. The field applies principles of physics, historically Newtonian mechanics, to astronomical objects such as stars and planets. It is distinguished from astrodynamics, which is the study of the creation of artificial satellite orbits. Celestial mechanics - History of celestial mechanics. Although modern analytic celestial mechanics starts 400 years ago with Isaac Newton, prior studies addres ...

Including:

Celestial mechanics - History of celestial mechanics
Celestial mechanics - Ancient Civilizations Celestial mechanics - Claudius Ptolemy Celestial mechanics - Johannes Kepler Celestial mechanics - Isaac Newton Celestial mechanics - Albert Einstein Celestial mechanics - Open problems
Celestial mechanics - Examples of problems
Celestial mechanics - Perturbation theory
Celestial mechanics - External link

Read more here: » Celestial mechanics: Encyclopedia - Celestial mechanics

Celestial mechanics is a division of astronomy dealing with the motions and gravitational effects of celestial objects. The field applies principles of physics, historically Newtonian mechanics, to astronomical objects such as stars and planets. It is distinguished from astrodynamics, which is the study of the creation of artificial satellite orbits. Celestial mechanics - History of celestial mechanics. Although modern analytic celestial mechanics starts 400 years ago with Isaac Newton, prior studies addres ...

Including:

Celestial mechanics - History of celestial mechanics
Celestial mechanics - Ancient Civilizations Celestial mechanics - Claudius Ptolemy Celestial mechanics - Johannes Kepler Celestial mechanics - Isaac Newton Celestial mechanics - Albert Einstein Celestial mechanics - Open problems
Celestial mechanics - Examples of problems
Celestial mechanics - Perturbation theory
Celestial mechanics - External link

Read more here: » Celestial mechanics: Encyclopedia - Celestial mechanics

Bio-Mechanics

is a gentle yet powerful form of body work which results in the proper alignment of the body's sacrum. Since the sacrum is the center of gravity of the body, this can in turn result in total body alignment. Additionally, this can unblock base chakra energy and release stored traumas and toxins from the body.

(See also: Bio-Mechanics, Alternative Health, Body Mind and Soul)

Technically a portable double inclined plane, a wedge is a simple machine used to separate two objects, or portions of objects, through the application of force, perpendicular to the inclined surfaces, developed by conversion of force applied to the blunt end. The mechanical advantage of a wedge depends on the ratio of its length to its thickness. Examples include axes and nails. Knives and chisels can sometimes be used as wedges, however, they are more fundamentally cutting implements. Oth

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In quantum mechanics in the Heisenberg picture the state vector, |ψ> does not change with time, and an observable A satisfies In some sense, the Heisenberg picture is more natural and fundamental than the Schrödinger picture, especially for relativistic theories. Lorentz invariance is manifest in the Heisenberg picture. Moreover, the similarity to classical physics is easily seen: by replacing the commutator above by the Poisson bracket, the Heisenberg e ...

See also:

Matrix mechanics, Matrix mechanics - Development of matrix mechanics, Matrix mechanics - Mathematical details, Matrix mechanics - Deriving Heisenberg's equation

Read more here: » Matrix mechanics: Encyclopedia II - Matrix mechanics - Mathematical details

The concept of effective stress is central to understanding behaviour of soils under different conditions. Effective stress is a measurement of the load borne by the soil skeleton. This pressure determines the ability of soil to resist shear stress. If the effective stress in a soil is reduced to zero, quick condition is said to occur (see quicksand). Effective stress (σ ' ) of a soil is calculated from two easily measured parameters, total stress (σ) and pore water pressure (μ) according to: σ' = σ - μ< ...

See also:

Soil mechanics, Soil mechanics - Basic Charateristics of Soils, Soil mechanics - Seepage, Soil mechanics - Effective Stress σ ', Soil mechanics - Total Stress σ, Soil mechanics - Pore water pressure μ, Soil mechanics - Shear strength, Soil mechanics - Stresses and Displacements, Soil mechanics - Consolidation theory, Soil mechanics - Lateral earth pressure, Soil mechanics - Bearing Capacity, Soil mechanics - Stability of Slopes, Soil mechanics - Ground Investigation

Read more here: » Soil mechanics: Encyclopedia II - Soil mechanics - Effective Stress σ '

A.I.M., or Advanced Idea Mechanics, is a fictional group in the Marvel Universe. Advanced Idea Mechanics - History. A.I.M. is an organization of brilliant scientists and their hirelings dedicated to the acquisition of power and the overthrow of all governments by technological means. A.I.M. was organized late in World War II by Baron Wolfgang von Strucker to develop advanced weaponry for his subversive organization HYDRA. They were close to developing and attaining nuclear weapons when HYDRA ...

Including:

Advanced Idea Mechanics - History Advanced Idea Mechanics - House of M

Read more here: » Advanced Idea Mechanics: Encyclopedia - Advanced Idea Mechanics

An Aeroplane (Airplane in US usage), is defined as: a power-driven heavier than air Aircraft, deriving its lift chiefly from aerodynamic reactions on surface which remain fixed under given conditions of flight. (ICAO Doc 9110) Aircraft flight mechanics - Straight and level flight of airplane. In steady, level flight, an airplane can be considered as being acted on by four forces in equilibrium: lift, weight, thrust, and drag. Thrust is the force generated by the engine and acts along the engine's thr ...

Including:

Aircraft flight mechanics - Straight and level flight of airplane Aircraft flight mechanics - Airplane control and movement Aircraft flight mechanics - Airplane control surfaces Aircraft flight mechanics - Aerodynamics

Read more here: » Aircraft flight mechanics: Encyclopedia - Aircraft flight mechanics

Quantum mechanics is a physical science dealing with the behaviour of matter and electromagnetic waves on the scale of atoms and subatomic particles. Since all matter is made of atoms, quantum mechanics is also important in understanding how large objects such as stars and galaxies and even the Big Bang can be analyzed and explained. Quantum mechanical departures from classical physics are most often encountered at small length scales, very low or very high energies, or extremely low temperatures. Quantum mechanics is the basis of mod ...

Including:

Basics of quantum mechanics - Background Basics of quantum mechanics - Old quantum theory
Basics of quantum mechanics - Planck's constant Basics of quantum mechanics - Reduced Planck's constant Basics of quantum mechanics - Bohr atom Basics of quantum mechanics - Wave-particle duality
Basics of quantum mechanics - Development of modern quantum mechanics
Basics of quantum mechanics - Full quantum mechanical theory Basics of quantum mechanics - Schrödinger wave equation Basics of quantum mechanics - Uncertainty Principle Basics of quantum mechanics - Wavefunction collapse Basics of quantum mechanics - Eigenstates and eigenvalues Basics of quantum mechanics - The Pauli Exclusion Principle Basics of quantum mechanics - Dirac wave equation Basics of quantum mechanics - Quantum entanglement
Basics of quantum mechanics - Notes

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A violin consists of a body or corpus, a neck, a bridge, a soundpost, four strings, and various fittings. The fittings are the tuning pegs, tailpieceand tailgut, endpin, possibly one or more fine tuners on the tailpiece, and perhaps a chinrest, either attached directly over the tailpiece or to the left of it. Violin construction and mechanics - Body. The body is two arched plates fastened to a garland of ribs with animal hide glue. The rib garland includes a top block, four corner blocks (sometimes omitted in chea ...

Including:

Violin construction and mechanics - Body
Violin construction and mechanics - Top Violin construction and mechanics - Back and ribs
Violin construction and mechanics - Neck Violin construction and mechanics - Bridge Violin construction and mechanics - Sound post Violin construction and mechanics - Tailpiece Violin construction and mechanics - Pegs

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A relatively new technology is the electronically-controlled active differential. A computer uses inputs from multiple sensors, including yaw rate, steering angle, and lateral acceleration and adjusts the distribution of torque to compensate for undesirable handling behaviors like understeer. Active differentials are common in the World Rally Championship, though they may be eliminated in coming years. The first use of this technology on a production automobile was Honda's 1997 Active Torque Transfer System on the Prelude SH ...

See also:

Differential mechanics, Differential mechanics - Active differential, Differential mechanics - History

Read more here: » Differential mechanics: Encyclopedia II - Differential mechanics - Active differential

Invoking the concept of the canonical ensemble, it is possible to derive the probability Pi that a macroscopic system in thermal equilibrium with its environment will be in a given microstate with energy Ei: where , The temperature T arises from the fact that the system is in thermal equilibrium with its environment . The probabilities of the various microstates must add to one, and the normalization factor in the denominat ...

See also:

Statistical mechanics, Statistical mechanics - Fundamental postulate, Statistical mechanics - Microcanonical ensemble, Statistical mechanics - Canonical ensemble, Statistical mechanics - Thermodynamic Connection, Statistical mechanics - Grand canonical ensemble, Statistical mechanics - Equivalence between descriptions at the thermodynamic limit

Read more here: » Statistical mechanics: Encyclopedia II - Statistical mechanics - Canonical ensemble

The fundamental postulate in statistical mechanics (also known as the equal a priori probability postulate) is the following: Given an isolated system in equilibrium, it is found with equal probability in each of its accessible microstates. This postulate is a fundamental assumption in statistical mechanics - it states that a system does not have any preference for any of its available microstates. Given Ω microstates at a particular energy, the probability of fi ...

See also:

Statistical mechanics, Statistical mechanics - Fundamental postulate, Statistical mechanics - Microcanonical ensemble, Statistical mechanics - Canonical ensemble, Statistical mechanics - Thermodynamic Connection, Statistical mechanics - Grand canonical ensemble, Statistical mechanics - Equivalence between descriptions at the thermodynamic limit

Read more here: » Statistical mechanics: Encyclopedia II - Statistical mechanics - Fundamental postulate

The following introduces the basic concepts of classical mechanics. For simplicity, it uses point particles, objects with negligible size. The motion of a point particle is characterized by a small number of parameters: its position, mass, and the forces applied to it. Each of these parameters is discussed in turn. In reality, the kind of objects which classical mechanics can describe always have a non-zero size. True point particles, such as the electron, are normally better described by quantum mechanics. Objects with non-zero size ...

See also:

Classical mechanics, Classical mechanics - Description of the theory, Classical mechanics - Position and its derivatives, Classical mechanics - Forces; Newton's second law, Classical mechanics - Energy, Classical mechanics - Beyond Newton's Laws, Classical mechanics - Classical transformations, Classical mechanics - History, Classical mechanics - Limits of validity, Classical mechanics - The classical approximation to special relativity, Classical mechanics - The classical approximation to quantum mechanics, Classical mechanics - Notes

Read more here: » Classical mechanics: Encyclopedia II - Classical mechanics - Description of the theory

Main article: History of classical mechanics The Greeks, and Aristotle in particular, were the first to propose that there are abstract principles governing nature. One of the first scientists who suggested abstract laws was Galileo Galilei who may have performed the famous experiment of dropping two cannon balls from the tower of Pisa. (The theory and the practice showed that they both hit the ground at the same time.) Though the reality of this experiment is disputed, he did carry out quantitative experiments by rolling balls on an inclined plane; his correct theory of accelerated motion was apparent ...

See also:

Classical mechanics, Classical mechanics - Description of the theory, Classical mechanics - Position and its derivatives, Classical mechanics - Forces; Newton's second law, Classical mechanics - Energy, Classical mechanics - Beyond Newton's Laws, Classical mechanics - Classical transformations, Classical mechanics - History, Classical mechanics - Limits of validity, Classical mechanics - The classical approximation to special relativity, Classical mechanics - The classical approximation to quantum mechanics, Classical mechanics - Notes

Read more here: » Classical mechanics: Encyclopedia II - Classical mechanics - History

It is often appropriate to model living tissues as continuous media. For example, at the tissue level, the arterial wall can be modeled as a continuum. This assumption breaks down when the length scales of interest approach the order of the microstructural details of the material. The basic postulates of continuum mechanics are conservation of linear and angular momentum, conservation of mass, conservation of energy, and the entropy inequality. Solids are usually modeled using "reference" or "Lagrangian" coordinates, whereas fluids are often ...

See also:

Biomechanics, Biomechanics - Applications, Biomechanics - Continuum Mechanics, Biomechanics - Biomechanics of Circulation, Biomechanics - Biomechanics of the bones, Biomechanics - Biomechanics of the Muscle, Biomechanics - Biomechanics of Soft Tissues, Biomechanics - Viscoelasticity, Biomechanics - Nonlinear Theories

Read more here: » Biomechanics: Encyclopedia II - Biomechanics - Continuum Mechanics