## Spin (physics)

In quantum mechanics and particle **physics** , spin is a fundamental characteristic property of elementary particles , composite particles ( hadrons ), and atomic nuclei . [ note 1 ] All elementary particles of a given kind have the same spin quantum number , an important part of a particle

**wikipedia.org**| 2011/10/3 1:15:00

## Dynamical simulation

In Computer science , a program called a **Physics** engine is used to model the behaviors of objects in space. These engines allow simulation of the way bodies of many types are affected by a variety of physical stimuli. They are also used to create Dynamical simulations without having to know

**wikipedia.org**| 2011/5/24 4:31:35

## Statistical ensemble (mathematical physics)

In mathematical **physics** , especially as introduced into statistical mechanics and thermodynamics by J. Willard Gibbs in 1878, an ensemble (also statistical ensemble or thermodynamic ensemble ) [ 1 ] [ 2 ] is an idealization consisting of a large number of mental copies (sometimes infinitely

**wikipedia.org**| 2011/4/14 23:32:32

## Reaction (physics)

of describing the combined motion of both objects (ignoring all other celestial bodies for the **moment** ) is to say that they both orbit around the center of mass of the combined system. Consider a mass hanging at the end of a non-stretchable cable attached to the ceiling of a laboratory. The

**wikipedia.org**| 2011/9/14 10:10:14

## Causality (physics)

equal probability of stopping at each position. [ edit ] Various concepts of cause and effect in **physics** In **physics** it is useful to interpret certain terms of a physical theory as causes and other terms as effects. Thus, in classical (Newtonian) mechanics a cause may be represented by

**wikipedia.org**| 2011/8/9 3:03:46

## List of elementary physics formulae

topic, reduce to a number of idealized special cases. 3. Formulae which frequently appear in **physics** literature, in a small addition some perhaps less common formulae. 4. Level of study is typically that of advanced school/ introductory degree level **Physics** , and beyond. 5. For generality

**wikipedia.org**| 2011/9/28 16:16:41

## Digital physics

In **physics** and cosmology , digital **physics** is a collection of theoretical perspectives based on the premise that the universe is, at heart, describable by information , and is therefore computable . Therefore, the universe can be conceived as either the output of a computer program or

**wikipedia.org**| 2011/4/25 1:16:44

## Defining equation (physics)

In **physics** , defining equations are equations that define new quantities in terms of base quantities [ 1 ] . This article uses the current SI system of units , not natural or characteristic units . Contents 1 Treatment of vectors 2 Classical mechanics 2.1 Mass and inertia

**wikipedia.org**| 2011/10/5 16:01:22