City

A city is a large and populated urban area. It is typically larger and more populous than a town, and it is generally organized around a central business district. Cities are often centers of culture, commerce, education, and government, and they are usually the home of a diverse range of people and industries. Cities are typically the hub of a larger metropolitan area, which is a region that includes the city and its surrounding suburbs. Some examples of famous cities include New York City, London, and Paris.

4-velocity 5 (2)

4 velocity is a four-vector whose elements are given by the contravariant expression {\displaystyle U^{\mu }={\frac {dx^{\mu }}{d\tau }}} where {\displaystyle \tau } is the proper time. For special relativity an inertial frame observer finds the proper time from his own coordinate time {\displaystyle t} and the coordinate speed {\displaystyle u} of the thing being observed by {\displaystyle dt={\frac {d\tau }{\sqrt {1-{\frac {u^{2}}{c^{2}}}}}}=\gamma d\tau […]

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Howard Wolpe 5 (1)

Howard Eliot Wolpe was a seven-term United States Representative from Michigan and the Clinton Administration’s Presidential Special Envoy to the African Great Lakes Region, where he led the US delegation to the Arusha and Lusaka peace talks aimed at ending civil wars in Burundi and the Democratic Republic of the Congo. He rejoined the State

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Van Stadens Wind Farm 4.5 (2)

Construction on Van Stadens Wind Farm outside Port Elizabeth in the Eastern Cape, was started in September 2012. The South African renewable energy company, MetroWind, is proceeding with the R550-million project which will provide power to the Nelson Mandela Bay municipality. The company will construct nine 3-megawatt wind turbines, boosting the local electricity grid, accounting for nearly half the 10 percent renewable energy

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Rochester, New York 5 (29)

Rochester is a city located in western New York State, United States, on the southern shore of Lake Ontario at the mouth of the Genesee River. It is the third-largest city in New York State after New York City and Buffalo and serves as the cultural, economic, and educational hub of the Rochester metropolitan area.

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Volume 0 (0)

The amount of three-dimensional space enclosed by a closed surface is expressed as a scalar quantity. For example, the space occupied or contained by a material (solid, liquid, gas, or plasma) or 3D form. Volume is frequently mathematically measured using the SI-derived unit, the cubic metre. The volume of a container is commonly believed to

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Hippie 5 (1)

A hippie, also spelled hippy, especially in UK English, was a member of the counterculture of the 1960s, originally a youth movement that began in the United States during the mid-1960s and spread to other countries around the world. The word hippie came from hipster and was used to describe beatniks who moved into New York City’s Greenwich Village, San Francisco’s Haight-Ashbury district, and Chicago’s Old Town community. The term hippie was used

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