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A **city** is a large and permanent human settlement. Although there is no agreement on how a city is distinguished from a town in general English language meanings, many cities have a particular administrative, legal, or historical status based on local law.

Cities generally have complex systems for sanitation, utilities, land usage, housing, and transportation. The concentration of development greatly facilitates interaction between people and businesses, benefiting both parties in the process, but it also presents challenges to managing urban growth.

A big city or metropolis usually has associated suburbs and exurbs. Such cities are usually associated with metropolitan areas and urban areas, creating numerous business commuters traveling to urban centers for employment. Once a city expands far enough to reach another city, this region can be deemed a conurbation or megalopolis. In terms of population, the largest city proper is Shanghai, while the fastest-growing is Dubai.

There is not enough evidence to assert what conditions gave rise to the first cities. Some theorists have speculated on what they consider suitable pre-conditions and basic mechanisms that might have been important driving forces.

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/City

There are 281 municipalities in the U.S. state of Washington. State law determines the various powers its municipalities have.

Legally, a city in Washington can be described primarily by its class. There are five classes of cities in Washington:

**First class cities** are cities with a population over 10,000 at the time of reorganization and operating under a home rule charter. They are permitted to perform any function specifically granted them by Title 35 RCW (Revised Code of Washington). Among them are Seattle, Tacoma, Spokane, Vancouver, and Yakima.

**Second class cities** are cities with a population over 1,500 at the time of reorganization and operating without a home rule charter. Like first class cities, they are permitted to perform any function specifically granted them by Title 35 RCW. Among them are Port Orchard, Wapato, and Colville.

**Towns** are municipalities with a population of under 1,500 at the time of reorganization. Towns are not authorized to operate under a charter. Like the previously listed cities, they are permitted to perform any function specifically granted them by Title 35 RCW. Among them are Steilacoom, Friday Harbor, Eatonville, and Waterville. In 1994, the legislature made 1,500 the minimum population required to incorporate.

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/City_government_in_Washington_(state)

Texas has a total of 254 counties, many cities, and numerous special districts, the most common of which is the independent school district.

Texas has a total of 254 counties, by far the largest number of counties of any state.

Each county is run by a five-member Commissioners' Court consisting of four commissioners elected from single-member districts (called commissioner precincts) and a county judge elected at-large. The county judge does not have authority to veto a decision of the commissioners court; the judge votes along with the commissioners (being the tie-breaker in close calls). In smaller counties, the county judge actually does perform judicial duties, but in larger counties the judge's role is limited to serving on the commissioners court and certifying elections. Certain officials, such as the sheriff and tax collector, are elected separately by the voters, but the commissioners court determines their office budgets, and sets overall county policy. All county elections are partisan, and commissioner precincts are redistricted after each ten year Census both to equalize the voting power in each and in consideration of the political party preferences of the voters in each.

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Administrative_divisions_of_Texas

* Space* is an album by American jazz group the Modern Jazz Quartet featuring performances recorded in 1969 and released on the Apple label.

The Allmusic review stated "Overall this is an average but worthy outing from a group whose excellence could always be taken for granted".

All compositions by John Lewis, except where noted.

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Space_(Modern_Jazz_Quartet_album)

In mathematics, **four-dimensional space** ("4D") is a geometric space with four dimensions. It typically is more specifically four-dimensional Euclidean space, generalizing the rules of three-dimensional Euclidean space. It has been studied by mathematicians and philosophers for over two centuries, both for its own interest and for the insights it offered into mathematics and related fields.

Algebraically, it is generated by applying the rules of vectors and coordinate geometry to a space with four dimensions. In particular a vector with four elements (a 4-tuple) can be used to represent a position in four-dimensional space. The space is a Euclidean space, so has a metric and norm, and so all directions are treated as the same: the additional dimension is indistinguishable from the other three.

In modern physics, space and time are unified in a four-dimensional Minkowski continuum called spacetime, whose metric treats the time dimension differently from the three spatial dimensions (see below for the definition of the Minkowski metric/pairing). Spacetime is *not* a Euclidean space.

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Four-dimensional_space

**Three-dimensional space** (also: **tri-dimensional space** or **3-space**) is a geometric three-parameter model of the physical universe (without considering time) in which all known matter exists. These three dimensions can be labeled by a combination of three chosen from the terms *length*, *width*, *height*, *depth*, and *breadth*. Any three directions can be chosen, provided that they do not all lie in the same plane.

In physics and mathematics, a sequence of *n* numbers can be understood as a location in *n*-dimensional space. When *n* = 3, the set of all such locations is called **three-dimensional Euclidean space**. It is commonly represented by the symbol . This space is only one example of a great variety of spaces in three dimensions called 3-manifolds.

In mathematics, analytic geometry (also called Cartesian geometry) describes every point in three-dimensional space by means of three coordinates. Three coordinate axes are given, each perpendicular to the other two at the origin, the point at which they cross. They are usually labeled *x*, *y*, and *z*. Relative to these axes, the position of any point in three-dimensional space is given by an ordered triple of real numbers, each number giving the distance of that point from the origin measured along the given axis, which is equal to the distance of that point from the plane determined by the other two axes.

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Three-dimensional_space_(mathematics)

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