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The mean free time for a molecule in a fluid is the average time between collisions. The mean free path of the molecule is the product of the average speed and the mean free time. [1] These concepts are used in the kinetic theory of gases to compute transport coefficients such as the viscosity. [2] In a gas the mean free path may be much larger ...
Colbert is an English and French surname and given name of uncertain etymology.It is possible that it appeared independently several times throughout history. The name is recorded in England in the 11th century Domesday Book in Devon, Cheshire, and Lincolnshire. [1]
For ease of use, the [i] in front of the last name, and the ending _ve, were dropped. If the last name ends in [a], then removing the [j] would give the name of the patriarch or the place, as in, Grudaj - j = Gruda (place in MM). Otherwise, removing the whole ending [aj] yields the name of founder or place of origin, as in Lekaj - aj = Lek(ë).
Frey is a surname of German origin, from the Middle High German word "vri," meaning "free," and as a name, it referred to a free man, as opposed to a bondsman or serf in the feudal system. [ 1 ] [ 2 ] Other variations include Freyr, Freyer, Freyda, Freyman, Freyberg, Freystein, Fray, Frayr, Frayda, Frayberg, Frayman, Freeman.
Cochran is a surname of Scottish (and most likely of Cumbric) origin. The earliest known appearance is in Dumbartonshire (14th cent). The earliest known appearance is in Dumbartonshire (14th cent). The definition is unclear, however, the name may be derived from the extinct Cumbric language, which is closely related to the Welsh language . [ 2 ]
It is profiled separately from the surname "Pace", and is ranked 3578 for frequency. Newbold Pacey, a village in Warwickshire, existed as Newbold at the time of the Domesday Book and according to the Victoria County History later "took its name from "the family of Pascy, or Pacey". [3] The two surnames have historically been sometimes confused.
Several surnames have multiple spellings; this is sometimes due to unrelated families bearing the same surname. A single surname in either language may have multiple translations in the other. In some English translations of the names, the M(a)c- prefix may be omitted in the English, e.g. Bain vs MacBain, Cowan vs MacCowan, Ritchie vs MacRitchie.
One theory suggests that the surname is related to the place of the same name in Derbyshire and mean "[lives on] the bare hill". At the time of the British census of 1881, [1] the frequency of the surname Barlow was highest in Cheshire (4.4 times the British average), followed by Lancashire, Nottinghamshire, Staffordshire, Buckinghamshire, Derbyshire, Berkshire, Rutland and Warwickshire.