CWFugitt wrote:
At 08:53 AM 5/24/2007, you wrote:
in the case of water 1 cc weighs EXACTLY one gram. A pint is a pound
the whole world round ya know?
/Water is THE standard for volume and weight/.
I did not find this in the "international System of Units".
Short simple, ....... you actually think all water weighs the same ?
Wayne
All pure water at STD will have the same mass. We are not talking about
weight which is mass times the acceleration of gravity, and will be
different for different places, like 1/6 on the moon. grams is a mass,
not a weight and does not change value with location. The mass of water
is used in the definition of liter, which is defined as 1000 grams of
water at 3.98 C.
According to http://en.wikipedia.org/wiki/Litre
One litre of water has a mass <http://en.wikipedia.org/wiki/Mass> of
almost exactly one kilogram <http://en.wikipedia.org/wiki/Kilogram> (1
litre of chemically pure water has a mass of 1 kg at 277.13 K (3.98 °C
or 39.164 °F), at which point the pure water occupies the minimum volume
per mass). Similarly: 1 millilitre of water has about 1 g of mass; 1,000
litres of water has about 1,000 kg (1 tonne
<http://en.wikipedia.org/wiki/Tonne>) of mass. This relationship is
because the gram was originally defined as the mass of 1 mL of water.
However, this definition was abandoned in 1964 because the density of
water changes with pressure and the units of pressure are dependent on
the definition of mass.
Marshall
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