Speed of light — The speed of light in the vacuum of free space is an important physical constant usually denoted by the letter c . [NIST and BIPM practice is to use c 0 for the speed of light in vacuum in accord with international standard ISO 31 5. See… … Wikipedia
Speed of gravity — In the context of classical theories of gravitation, the speed of gravity refers to the speed at which a gravitational field propagates. This is the speed at which changes in the distribution of energy and momentum result in noticeable changes in … Wikipedia
Fundamental diagram of traffic flow — The fundamental diagram of traffic flow is a diagram that gives a relation between the traffic flux (vehicles/hour) and the traffic density (vehicles/km). A macroscopic traffic model involving traffic flux, traffic density and velocity forms the… … Wikipedia
Fundamental group — In mathematics, the fundamental group is one of the basic concepts of algebraic topology. Associated with every point of a topological space there is a fundamental group that conveys information about the 1 dimensional structure of the portion of … Wikipedia
Fundamental frequency — Vibration and standing waves in a string, The fundamental and the first 6 overtones The fundamental frequency, often referred to simply as the fundamental and abbreviated f0 or F0, is defined as the lowest frequency of a periodic waveform. In… … Wikipedia
Fundamental interaction — In physics, a fundamental interaction or fundamental force is a mechanism by which particles interact with each other, and which cannot be explained in terms of another interaction. Overview In the conceptual model of fundamental interactions,… … Wikipedia
Fundamental unit — A set of fundamental units is a set of units for physical quantities from which every other unit can be generated. In the language of measurement, quantities are quantifiable aspects of the world, such as time, distance, velocity, mass, momentum … Wikipedia
Speed — This article is about the property of moving bodies. For persons named Speed, see Speed (name). For the film, see Speed (1994 film). For other uses, see Speed (disambiguation). Classical mechanics … Wikipedia
fundamental interaction — In physics, the effect of any of the four fundamental forces gravitational, electromagnetic, strong, and weak. All known natural forces can be traced to these fundamental interactions. Gravitation is the attractive force between any two objects… … Universalium
speed of light — ▪ physics speed at which light waves propagate through different materials. In particular, the value for the speed of light in a vacuum is now defined as exactly 299,792,458 metres per second. The speed of light is considered a… … Universalium
