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The metre, kilogram, second system of units, also known more briefly as MKS units or the MKS system, [1] [2] [3] is a physical system of measurement based on the metre, kilogram, and second (MKS) as base units. Distances are described in terms of metres, mass in terms of kilograms and time in seconds.
The International Prototype of the Kilogram (referred to by metrologists as the IPK or Le Grand K; sometimes called the ur-kilogram, [1] [2] or urkilogram, [3] particularly by German-language authors writing in English [3] [4]:30 [5]: 64 ) is an object whose mass was used to define the kilogram from 1889, when it replaced the Kilogramme des ...
As relevant to this article, it was a unit of mass, being 120 lb (54 kg). Grzywna; Keel – a UK unit of mass for coal, equaling 21,540.19446656 kg (47,488.0000000 lb) [7]: 48 Large sack – a unit of mass equal to 2 (new) sacks; Long ton; Lot; Mark; Munjandie; Oka; Pao; Passeree – a unit of mass equal to about 4.6 kg (10.1412640605 lb ...
The kilogram (also spelled kilogramme [1]) is the base unit of mass in the International System of Units (SI), having the unit symbol kg. [1] The word "kilogram" is formed from the combination of the metric prefix kilo- (meaning one thousand) and gram ; [ 2 ] it is colloquially shortened to " kilo " (plural "kilos").
The abbreviation is not always a short form of the word used in the clue. For example: "Knight" for N (the symbol used in chess notation) Taking this one stage further, the clue word can hint at the word or words to be abbreviated rather than giving the word itself. For example: "About" for C or CA (for "circa"), or RE.
In France it used to be defined as 100 livres (pounds), about 48.95 kg (108 lb), and has been redefined as 100 kg (mesures usuelles), thus called metric quintal with symbol qq. In Spain , the quintal is still defined as 100 libras , or about 46 kg (101 lb), but the metric quintal is also defined as 100 kg; [ 3 ] In Portugal a quintal is 128 ...
The gal (Gal) is a unit of acceleration equal to 1 cm/s 2. [3] The dyne (dyn) is a unit of force equal to 1 g⋅cm⋅s −2 (10 μN). [3] The barye (Ba) is a unit of pressure equal to 1 dyn⋅cm −2 (100 mPa). The erg (erg) is a unit of energy equal to 1 dyn⋅cm (100 nJ). [3] The poise (P) is a unit of dynamic viscosity equal to 1 Ba⋅s (100 ...
For example, 1 m/s = (1 m) / (1 s) is the coherent derived unit for velocity. [ 1 ] : 139 With the exception of the kilogram (for which the prefix kilo- is required for a coherent unit), when prefixes are used with the coherent SI units, the resulting units are no longer coherent, because the prefix introduces a numerical factor other than one.