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  2. Dalton (unit) - Wikipedia

    en.wikipedia.org/wiki/Dalton_(unit)

    The dalton or unified atomic mass unit (symbols: Da or u, respectively) is a unit of mass defined as ⁠ 1 / 12 ⁠ of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state and at rest. [1] [2] It is a non-SI unit accepted for use with SI.

  3. Atomic mass - Wikipedia

    en.wikipedia.org/wiki/Atomic_mass

    This was adopted as the 'unified atomic mass unit'. The current International System of Units (SI) primary recommendation for the name of this unit is the dalton and symbol 'Da'. The name 'unified atomic mass unit' and symbol 'u' are recognized names and symbols for the same unit. [12]

  4. International System of Units - Wikipedia

    en.wikipedia.org/wiki/International_System_of_Units

    Furthermore, the same coherent SI unit may be a base unit in one context, but a coherent derived unit in another. For example, the ampere is a base unit when it is a unit of electric current, but a coherent derived unit when it is a unit of magnetomotive force. [1]: 140

  5. Atomic units - Wikipedia

    en.wikipedia.org/wiki/Atomic_units

    Hartree defined units based on three physical constants: [1]: 91 Both in order to eliminate various universal constants from the equations and also to avoid high powers of 10 in numerical work, it is convenient to express quantities in terms of units, which may be called 'atomic units', defined as follows:

  6. United States customary units - Wikipedia

    en.wikipedia.org/wiki/United_States_customary_units

    The United States customary system developed from English units that were in use in the British Empire before the U.S. became an independent country. The United Kingdom's system of measures evolved by 1824 to create the imperial system (with imperial units ), which was officially adopted in 1826, changing the definitions of some of its units.

  7. System of units of measurement - Wikipedia

    en.wikipedia.org/wiki/System_of_units_of_measurement

    A unit of measurement that applies to money is called a unit of account in economics and unit of measure in accounting. [5] This is normally a currency issued by a country or a fraction thereof; for instance, the US dollar and US cent (1 ⁄ 100 of a dollar), or the euro and euro cent.

  8. Was the Six Triple Eight Real? All About the History ... - AOL

    www.aol.com/lifestyle/six-triple-eight-real...

    The unit was an important link connecting American soldiers and their families back home. “Ladies, we have been ordered to provide hope,” Washington says as Adams in The Six Triple Eight .

  9. U - Wikipedia

    en.wikipedia.org/wiki/U

    The symbol 'U' is the chemical symbol for uranium. In the context of Newtonian mechanics, 'U' is the symbol for the potential energy of a system. 'u' is the symbol for the atomic mass unit, and 'U' is the symbol for one enzyme unit. In the International Phonetic Alphabet, the close back rounded vowel is represented by the lowercase u .