From: Tom Sobota (TSOBOTA@teleline.es)
Date: 06/12/00-10:34:38 AM Z
Hello, list
A 08.33 12/6/00 +0100, ha escrito:
>... Sometime in the early '60's the scientific community adopted a
standard metric terminolgy, which includes ...
... meters and centimetres etc for linear measure,
>and litres and so on for volume.
>
Well... not quite true. Cubic metric measures (cubic meters and their
derivatives, cubic decimeters and cubic centimeters i.e. 'cc') are volume
measures, used normally to express volumes of unspecified materials but
mainly solids. In US traditional measuring units you would have used cubic
feet for this. This is what you use for expressing i.e. a volume of wood
used for building purposes.
Liters and their derivatives (centiliters, milliliters...) are units of
_capacity_, used normally for expressing quantities of liquids and gases.
You use these metric units in circumstances where in the U.S. you would
have used (or still use) gallons, quarts or pints.
So, the correct usage is 'ml', and this is how all my (European made)
glassware is marked.
However, as Judy well suspects, the difference between 'ml' and 'cc' is
merely one of terminology, since a liter is defined as the quantity
contained in one cubic decimeter (=1000 cc) and this relation is invariant
under changes of temperature or pressure.
Bye
Tom
Tom Sobota
tsobota@teleline.es
Madrid, Espaņa
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