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  2. Chinese units of measurement - Wikipedia

    en.wikipedia.org/wiki/Chinese_units_of_measurement

    Table of mass units in the People's Republic of China since 1959 [4] Pinyin Character [15] Relative value Metric value Imperial value Notes lí: 市厘: 1 ⁄ 10 000: 50 mg 0.001 764 oz: cash: fēn: 市分: 1 ⁄ 1000: 500 mg 0.017 64 oz: candareen: qián: 市錢: 1 ⁄ 100: 5 g 0.1764 oz mace or Chinese dram: liǎng: 市兩: 1 ⁄ 10: 50 g 1. ...

  3. International System of Units - Wikipedia

    en.wikipedia.org/wiki/International_System_of_Units

    1 kg = ⁠ (299 792 458) 2 / (6.626 070 15 × 10 −34)(9 192 631 770) ⁠ ⁠ h Δν Cs / c 2 ⁠. All units in the SI can be expressed in terms of the base units, and the base units serve as a preferred set for expressing or analysing the relationships between units.

  4. Gram - Wikipedia

    en.wikipedia.org/wiki/Gram

    The gram (originally gramme; [1] SI unit symbol g) is a unit of mass in the International System of Units (SI) equal to one thousandth of a kilogram.. Originally defined as of 1795 as "the absolute weight of a volume of pure water equal to the cube of the hundredth part of a metre [1 cm 3], and at the temperature of melting ice", [2] the defining temperature (≈0 °C) was later changed to 4 ...

  5. Metric system - Wikipedia

    en.wikipedia.org/wiki/Metric_system

    Mass (kg): A 1-euro coin weighs 7.5 g; [27] a Sacagawea US 1-dollar coin weighs 8.1 g; [28] a UK 50-pence coin weighs 8.0 g. [ 29 ] Time (s): The use of minutes and hours instead of kilo and mega seconds: A second is ⁠ 1 / 60 ⁠ of a minute, which is ⁠ 1 / 60 ⁠ of an hour, which is ⁠ 1 / 24 ⁠ of a day, so a second is ⁠ 1 / 86 400 ...

  6. SI base unit - Wikipedia

    en.wikipedia.org/wiki/SI_base_unit

    kg mass "The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 × 10 −34 when expressed in the unit J s, which is equal to kg m 2 s −1, where the metre and the second are defined in terms of c and ∆ν Cs." [1]

  7. Orders of magnitude (mass) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(mass)

    The gram (10 −3 kg) is an SI derived unit of mass. However, the names of all SI mass units are based on gram, rather than on kilogram; thus 10 3 kg is a megagram (10 6 g), not a *kilokilogram. The tonne (t) is an SI-compatible unit of mass equal to a megagram (Mg), or 10 3 kg.

  8. Scale height - Wikipedia

    en.wikipedia.org/wiki/Scale_height

    G = Gravitational constant ≈ 6.674 × 10 −11 m 3 ⋅kg −1 ⋅s −2 ‍ [15] r = the radial cylindrical coordinate for the distance from the center of the star or centrally condensed object z = the height/altitude cylindrical coordinate for the distance from the disk midplane (or center of the star) M * = the mass of the star/centrally ...

  9. List of metric units - Wikipedia

    en.wikipedia.org/wiki/List_of_metric_units

    The fermi is a unit of distance used in nuclear physics equal to 1 fm. [9] The angstrom (symbol Å) is a unit of distance used in chemistry and atomic physics equal to 100 pm. The micron (μ) is a unit of distance equal to one micrometre (1 μm). The basic module (M) is a unit of distance equal to one hundred millimetres (100 mm).