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Rydberg formula
In atomic physics, the Rydberg formula calculates the wavelengths of a spectral line in many chemical elements. The formula was primarily presented as a generalization of the Balmer series for all
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Land transport
Land transport is the transport or movement of people, animals or goods from one location to another location on land. This is in contrast with other main types of transport such as maritime transp
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Cleveland Cavaliers
The Cleveland Cavaliers, often referred to as the Cavs, are an American professional basketball team based in Cleveland. The Cavaliers compete in the National Basketball Association (NBA) as a memb
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Chemical element
A chemical element is a chemical substance whose atoms all have the same number of protons. The number of protons is called the atomic number of that element. For example, oxygen has an atomic numb
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Joseph Duplessis
Joseph-Siffred Duplessis (22 September 1725 – 1 April 1802) was a French painter known for the clarity and immediacy of his portraits.Joseph DuplessisSelf-portrait of Duplessis, 1801BornJoseph-Siff
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Transport infrastructure
This article needs additional citations for verification.Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: "Tr
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Empirical relationship
In science, an empirical relationship or phenomenological relationship is a relationship or correlation that is supported by experiment or observation but not necessarily supported by theory.Analyt
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Oil refineries
An oil refinery or petroleum refinery is an industrial process plant where petroleum (crude oil) is transformed and refined into products such as gasoline (petrol), diesel fuel, asphalt base, fuel
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Astronomical symbol
Astronomical symbols are abstract pictorial symbols used to represent astronomical objects, theoretical constructs and observational events in European astronomy. The earliest forms of these symbol
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Independent Catholicism
Independent Catholicism is an independent sacramental movement of clergy and laity who self-identify as Catholic (most often as Old Catholic or as Independent Catholic) and form "micro-churches cla
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