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The first group of metric units are those that are at present defined as units within the International System of Units (SI). In its most restrictive interpretation, this is what may be meant when the term metric unit is used. The unit one (1) is the unit of a quantity of dimension one. It is the neutral element of any system of units. [2]
The micrometre (SI symbol: μm) is a unit of length in the metric system equal to 10 −6 metres ( 1 / 1 000 000 m = 0. 000 001 m). To help compare different orders of magnitude , this section lists some items with lengths between 10 −6 and 10 −5 m (between 1 and 10 micrometers , or μm).
The ounce (/ ˈ aʊ n s /) is any of several different units of mass, weight, or volume and is derived almost unchanged from the uncia, an Ancient Roman unit of measurement. The avoirdupois ounce (exactly 28.349 523 125 g) is 1 ⁄ 16 avoirdupois pound; this is the United States customary and British imperial ounce. It is primarily used in the ...
A number of units were used to measure mass in Belgium. One livre was equal to 489.5 grams (17.27 oz). Some other units are provided below: [2] [4] 1 loth = 1/32 livre 1 once = 1/16 livre 1 marc 1/2 livre 1 stein = 8 livre 1 quintal = 100 livre 1 chariot = 165 livre 1 balle = 200 livre 1 schiffpfund = 300 livre 1 charge = 400 livre.
US customary units Imperial units Metric units Notes 1 ⁄ 16 Pint (US) 1 US fl oz: 1.04 imp fl oz: 29.57 mL: Former size for US brandy nip bottles before metrication. Replaced by the 50 mL "metric nip". Miniature (US) 1.5 US fl oz-44.36 mL: Former size for US miniature bottles before metrication that were based on the post-Prohibition jigger.
1 bit – 0 or 1, false or true, Low or High (a.k.a. unibit) 1.442695 bits (log 2 e) – approximate size of a nat (a unit of information based on natural logarithms) 1.5849625 bits (log 2 3) – approximate size of a trit (a base-3 digit) 2 1: 2 bits – a crumb (a.k.a. dibit) enough to uniquely identify one base pair of DNA
A standard metric (concrete) block is 190 mm wide, 390 mm long, and 190 mm high, which allows for 10 mm mortar joints in between bricks, giving a standard unit size of 200 mm square by 400 mm long. [3] A standard metric brick is 90 by 57 by 190 mm; with 10 mm of mortar, that produces a standard unit of 100 mm x 200 mm. [3]
Metric prefixes have also been used with some non-metric units. The SI prefixes are metric prefixes that were standardised for use in the International System of Units (SI) by the International Bureau of Weights and Measures (BIPM) in resolutions dating from 1960 to 2022. [1] [2] Since 2009, they have formed part of the ISO/IEC 80000 standard.