Dating systems history


The use of prototypes, however, is problematic for a number of reasons.

There is the potential for loss, damage or destruction.

These were derived from each other via the properties of natural objects, mainly water: 1 litre of water weighs 1 kg and measures 1 cubic decimetre (dmĀ³).

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The prototypes then became the basis of the system.The metric system is a system of units for measurement developed in late 18th century France by the chemist Lavoisier to replace the disparate systems of measures then in use with a unified, natural and universal system.In the early metric system there were several fundamental or base units, the grad or grade for angles, the metre for length, the gram for weight and the litre for capacity.The most commonly used prefixes for values above the base unit are hecto- (hundred), kilo- (thousand) and mega- (million); and the most commonly used for parts of the base value (i.e.below the base value) are deci- (tenth), centi- (hundredth) and milli- (thousandth).The adoption of the metric system in France was slow, but its desirability as an international system was recognised by geodesists and others.

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