Search results
Results from the WOW.Com Content Network
In science and technology, an arbitrary unit (abbreviated arb. unit, [1] see below) or procedure defined unit [2] (p.d.u.) is a relative unit of measurement to show the ratio of amount of substance, intensity, or other quantities, to a predetermined reference measurement. The reference measurement is typically defined by the local laboratories ...
A unit of measurement, or unit of measure, ... The current international standard metric system is the International System of Units (abbreviated to SI).
The fourth unit could be chosen to be electric current, voltage, or electrical resistance. [35] Electric current with named unit 'ampere' was chosen as the base unit, and the other electrical quantities derived from it according to the laws of physics. When combined with the MKS the new system, known as MKSA, was approved in 1946. [4]
Unit system Domain Derivation Unit name Unit symbol Dimension symbol Quantity name Definition In SI base units In other SI units SI: Physics: Basic: second [n 1] s: T: time: The duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom. s: SI ...
However, the abbreviation mcg is also the symbol for an obsolete centimetre–gram–second system of units unit of measure known as millicentigram, which is equal to 10 μg. Gamma (symbol: γ) is a deprecated non-SI unit of mass equal to 1 μg. [2]
An abbreviation (from Latin brevis, meaning "short" [1]) is a shortened form of a word or phrase, by any method including shortening, contraction, initialism (which includes acronym) or crasis. An abbreviation may be a shortened form of a word, usually ended with a trailing period. For example: etc. is the usual abbreviation for et cetera.
The BIPM symbol for the tonne is t, adopted at the same time as the unit in 1879. [1] Its use is also official for the metric ton in the United States, having been adopted by the United States National Institute of Standards and Technology (NIST). [2] [3] It is a symbol, not an abbreviation, and should not be followed by a period. Use of lower ...
By default, the name of the input unit is shown, while the output is abbreviated using the unit's symbol. If wanted, names or symbols can be used, and the output ...