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Intermodal container traffic is commonly measured in twenty-foot equivalent units (TEUs), rather than cargo weight, e.g. a TEU-km would be the equivalent of one twenty-foot container transported one kilometer. [6]
On 27 June 2008, 36 European electricity transmission system operators (TSOs) signed a declaration of intent in Prague to create the ENTSO-E. [3] ENTSO-E was established on 19 December 2008 in Brussels by 42 TSOs as a successor of six regional associations of the electricity transmission system operators. [4] [5] ENTSO-E became operational on 1 ...
The International System of Units, internationally known by the abbreviation SI (from French Système international d'unités), is the modern form of the metric system and the world's most widely used system of measurement.
The term cuerda can refer to areas of different sizes. Cuerdas can refer to areas that are 50 x 50, 40 x 40, 30 x 30, 25 x 25 or 20 x 20 varas (i.e. 2500, 1600, 900, 625, or 400 square varas). [3] In addition, some sources describe a cuerda as 32 x 32 varas. In Guatemala, the linear vara is 0.8421 meters.
In physics, natural unit systems are measurement systems for which selected physical constants have been set to 1 through nondimensionalization of physical units.For example, the speed of light c may be set to 1, and it may then be omitted, equating mass and energy directly E = m rather than using c as a conversion factor in the typical mass–energy equivalence equation E = mc 2.
In SI units, the values of c, h, e and k B are exact and the values of ε 0 and G in SI units respectively have relative uncertainties of 1.6 × 10 −10 [16] and 2.2 × 10 −5. [17] Hence, the uncertainties in the SI values of the Planck units derive almost entirely from uncertainty in the SI value of G .
Secretariat of Communications and Transportation building Former Secretariat building, Calle Tacuba. The forerunner of the modern-day SCT was created in 1891 under President Porfirio Díaz and was known as the Secretariat of Communications (Secretaría de Comunicaciones); its first incumbent as secretary was Manuel González Cosío.
The Wobbe index is expressed in MJ/Nm³ (where 'Nm³' indicates'm³ in Normal conditions), or sometimes in BTU/scf.In the case of natural gas (molar mass 17 g/mol), the typical heating value is around 39 MJ/Nm³ (1,050 BTU/scf) and the specific gravity is approximately 0.59, giving a typical Wobbe index of 51 MJ/Nm³ (1,367 BTU/scf).