virtual quantity
1Virtual particle — In physics, a virtual particle is a particle that exists for a limited time and space, introducing uncertainty in their energy and momentum due to the Heisenberg Uncertainty Principle. (Indeed, because energy and momentum in quantum mechanics are …
2Virtual ground — In the theory of electrical networks, a virtual ground ( or virtual earth) is a node of the circuit that is maintained at a steady reference potential, without being connected directly to the reference potential. In some cases the reference… …
3Virtual Console — This article is about the Virtual Console component of Nintendo s game download services. For the computer user interface concept, see virtual console. Virtual Console Publisher(s) …
4Virtual pharmacies — A virtual pharmacy is a pharmacy that has a presence in the virtual world or Internet (World Wide Web). They vary from simply an expansion of land based pharmacies like CVS or Walgreen’s whom needed to ad the capability to serve patients from the …
5Virtual moment — Moment Mo ment, n. [F. moment, L. momentum, for movimentum movement, motion, moment, fr. movere to move. See {Move}, and cf. {Momentum}, {Movement}.] 1. A minute portion of time; a point of time; an instant; as, at that very moment. [1913… …
6History of Physics — History of Physics † Catholic Encyclopedia ► History of Physics The subject will be treated under the following heads: I. A Glance at Ancient Physics; II. Science and Early Christian Scholars; III. A Glance at Arabian Physics; IV.… …
7Energy — This article is about the scalar physical quantity. For other uses, see Energy (disambiguation). Energetic redirects here. For other uses, see Energetic (disambiguation) …
8mechanics — /meuh kan iks/, n. 1. (used with a sing. v.) the branch of physics that deals with the action of forces on bodies and with motion, comprised of kinetics, statics, and kinematics. 2. (used with a sing. v.) the theoretical and practical application …
9optics — /op tiks/, n. (used with a sing. v.) the branch of physical science that deals with the properties and phenomena of both visible and invisible light and with vision. [1605 15; < ML optica < Gk optiká, n. use of neut. pl. of OPTIKÓS; see OPTIC,… …
10Renormalization — Quantum field theory (Feynman diagram) …
