unit distances

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• Unit distance graph — In mathematics, and particularly geometric graph theory, a unit distance graph is a graph formed from a collection of points in the Euclidean plane by connecting two points by an edge whenever the distance between the two points is exactly one.… …   Wikipedia

• Unit disk graph — In geometric graph theory, a unit disk graph is the intersection graph of a family of unit circles in the Euclidean plane. That is, we form a vertex for each circle, and connect two vertices by an edge whenever the corresponding circles cross… …   Wikipedia

• Unit 731 — The Unit 731 complex Location Pingfang Coordinates …   Wikipedia

• Unit sphere — some unit spheres In mathematics, a unit sphere is the set of points of distance 1 from a fixed central point, where a generalized concept of distance may be used; a closed unit ball is the set of points of distance less than or equal to 1 from a …   Wikipedia

• unit — 1. One; a single person or thing. 2. A standard of measure, weight, or any other quality, by multiplications or fractions of which a scale or system is formed. 3. A group of persons or things considered as a whole because of mutual activities or… …   Medical dictionary

• Distances shorter than 1 pm — To help compare different orders of magnitude this page lists lengths shorter than 10−12 metres (1 pm). This series on orders of magnitude does not have a range of shorter distances Contents 1 Shorter than 1 ym 2 1 ym to 1 zm 3 1 zm to 1 am …   Wikipedia

• unit cell — In crystallography, the smallest fragment of a crystal that is exactly reproduced in the construction of the crystal lattice. Opposite sides of a unit cell are parallel, and the distances along the edges measure unit cell size. In the description …   Petroleum refining glossary

• Unit Load Device — Morphologie d un aéronef Sommaire 1 Composants de base d un aéronef 1.1 Cellule 1.2 Emport 1.3 Propulseur 1.4 …   Wikipédia en Français

• Astronomical unit — This article is about unit of length. For the full system of units, see Astronomical system of units. 1 astronomical unit = SI units 149.60×10^6 km 149.60×10^9 m Astronomical units 4.8481 …   Wikipedia

• astronomical unit — Astron. a unit of length, equal to the mean distance of the earth from the sun: approximately 93 million miles (150 million km). Abbr.: AU [1900 05] * * * ▪ unit of measurement        Comparative data for the Sun, planets, and other solar system… …   Universalium

• Li (unit) — The li (里, lǐ) is a traditional Chinese unit of distance, which has varied considerably over time but now has a standardized length of 500 meters or half a kilometer (approx. 1640 feet). A modern li consists of 1,500 Chinese feet or chi and, in… …   Wikipedia