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Mar 5, 2020 · Learn metric abbreviations for data, power and temperature, too. ... volume and weight (mass). You have the meter (m) for length, liter (l) for volume and gram (g ...
- Length: Meter (m) The meter is the metric unit of length. It's defined as the length of the path light travels in a vacuum during 1/299,792,458 of a second.
- Mass: Kilogram (kg) The kilogram is the metric unit of mass. It's the mass of the international prototype of the kilogram: a standard platinum/iridium 1 kg mass housed near Paris at the International Bureau of Weights and Measures (BIPM).
- Time: Second (s) The basic unit of time is the second. The second is defined as the duration of 9,192,631,770 oscillations of radiation corresponding to the transition between the two hyperfine levels of cesium-133.
- Electric current: Ampere (A) The basic unit of electric current is the ampere. The ampere is defined as the constant current that, if maintained in two infinitely long straight parallel conductors with a negligible circular cross-section and placed 1 m apart in a vacuum, would produce a force between the conductors equal to 2 x 10-7 newtons per meter of length.
The gram of force is equal to the weight of a gram of mass under standard gravity. For greater precision, the mass may be weighed at a point at which the acceleration due to gravity is 980.655 cm/sec 2. The official International System of Units abbreviation is g, but gm has also been used.
- The Editors of Encyclopaedia Britannica
The gram (originally gramme; 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", the defining temperature (≈0 °C) was later changed to 4 °C, the ...
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SI base units. The SI comprises a coherent system of units of measurement starting with seven base units, which are the second (symbol s, the unit of time ), metre (m, length ), kilogram (kg, mass ), ampere (A, electric current ), kelvin (K, thermodynamic temperature ), mole (mol, amount of substance ), and candela (cd, luminous intensity ).
Apr 13, 2024 · The 1960 International System builds on the MKS system. Its seven basic units, from which other units are derived, were defined as follows: for length, the metre, defined as the distance traveled by light in a vacuum in 1/299,792,458 second; for mass, the kilogram, which equaled 1,000 grams as defined by the international prototype kilogram of platinum-iridium in the keeping of the ...
Nov 21, 2023 · But often metric system units are expressed with an abbreviation to the right of a number and sometimes as a prefix. For example, 100 kilometers would be represented as 100 km; and 1 kilogram ...
