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Kecap léter (tina litre atawa liter na basa Inggris) ngandung harti hiji unit métrik eusi. Léter lain mangrupakeun unit SI, tapi (sarua jeung unit jam sarta poé) kadaptar salaku salah sahiji "unit lian ti SI nu ditampa jeung dipaké babarengan jeung SI" (catetan NIST). Unit SI pikeun volume nyaéta méter kubik (m3) catetan NIST ngeunaan unit SI.
Unit léter dilambangkeun ku hurup l atawa L atawa ℓ.
Dadaran
Saléter sarua jeung
- 0.001 méter kubik,
- 1 désiméter kubik,
- 1000 séntiméter kubik,
- eusi kotak nu sisina 10 séntiméter.
Léter dibagi kana unit-unit nu leuwih leutik ku nambahkeun awalan SI, sahingga saléter sarua jeung
- 1.000 mililéter (ml) = 1.000 séntiméter kubik (cm³),
- 100 séntiléter (cl),
- 10 désiléter (dl),
- 0.01 héktoléter (hl).
Volume nu leuwih badag bisa maké satuan kiloléter (kl, 1.000 léter) atawa mégaléter (Ml, 1.000.000 léter), tapi ilaharna mah maké méter kubik (m³, 1.000 léter). mililéter << sétiléter << désiléter << léter
Lambang
Lambang pikeun léter tadina mah l (aksara leutik "l"), tapi, sangkan teu pahili jeung angka hiji ("1"), mangga L (aksara badag "L") mimiti dipaké taun 1979. Hal ieu dirojong ku National Institute of Standards and Technology AS, ogé Kanada jeung Australia. Lambang pikeun unit turunanana nya dina bentuk µL, mL, kL, ML, jst.
History
In 1793, the litre was introduced in France as one of the new "Republican Measures", and defined as one cubic decimetre. Its name derived from an older French unit, the litron, whose name came from Greek via Latin.
In 1879, the CIPM adopted the definition of the litre, and the symbol l (lowercase letter l).
In 1901, at the 3rd CGPM conference, the litre was redefined as the space occupied by 1 kg of pure water at the temperature of its maximum density (3.98 °C) under a pressure of 1 atm. This made the litre equal to about 1.000 028 dm³ (earlier reference works usually put it at 1.000 027 dm³).
In 1964, at the 12th CGPM conference, the litre was once again defined in exact relation to the metre, as another name for the cubic decimetre, that is, exactly 1 dm³. NIST Reference
In 1979, at the 16th CGPM conference, the alternative symbol L (uppercase letter L) was adopted.
See also
External Links
- NIST recommends uppercase letter L
- The UK's National Measurement Laboratory NPL - "Internationally recognised non SI units"
- The International System of Units(SI)
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"Léter"