Wikipedia: History of Kilogram

Difference (from prior major revision) (minor diff, author diff)

Changed: 1c1,5

A kilogram, often denoted by kg, is one thousand grams, and is one of seven SI base units. It is a unit of mass. The SI system defines the unit to be equal to the mass of the international prototype of the kilogram, which is made from an alloy of platinum and rhodium and kept at the Bureau International des Poids et Mesures (International bureau of Weights and Measures). Official copies of the prototype kilogram are made available as national prototypes. The international protoype kilogram was made in the 1880s.

A kilogram, often denoted by kg, is one thousand grams, and is one of seven SI base units. It is a unit of mass. The SI system defines the unit to be equal to the mass of the international prototype of the kilogram, which is made from an alloy of platinum and iridium and kept at the Bureau International des Poids et Mesures ([International bureau of Weights and Measures]?). Official copies of the prototype kilogram are made available as national prototypes. The international protoype kilogram was made in the 1880s.

The kilogram is intended to represent the mass of one liter of water.

/Talk?

Removed: 3d6

Originally, the kilogram was defined as the mass of one liter of water (used because liquid water does not expand or contract much as its temperature changes).

	Revision 14 . . (edit) December 7, 2001 9:17 pm by (logged).191.188.xxx
	Revision 13 . . (edit) September 20, 2001 8:23 am by DrBob [Corrected "rhodium" to "iridium"]
	Revision 11 . . (edit) September 13, 2001 1:23 am by Mike Dill