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The International (SI) System of Measurement. The International System of Measurements (SI) In 1960, the Eleventh General Conference on Weights and Measures.

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Presentation on theme: "The International (SI) System of Measurement. The International System of Measurements (SI) In 1960, the Eleventh General Conference on Weights and Measures."— Presentation transcript:

1 The International (SI) System of Measurement

2 The International System of Measurements (SI) In 1960, the Eleventh General Conference on Weights and Measures was held in Paris. They adopted a universal system of measurement units called Le Systeme International d'Unites (French), which is a revised version of the metric system. This International System, or SI, as it is commonly referred to, is used for commerce and Science around the world.

3 SI Base Units Base QuantityName of unitSymbol LengthMeterm MassKilogramkg TimeSeconds Electrical CurrentAmpereA TemperatureKelvinK Amount of SubstanceMolemol Luminous IntensityCandelaCd

4 Derived Units Base QuantityCommon Units VolumeL Densitykg/L Accelerationm/s 2 Forcekg x m/s 2 PressurekPa

5 Prefixes are used with the base units in order to increase or decrease the value that they represent. All of the prefixes represent some factor of 10, and they can be used with any of the SI base units PrefixSymbolMultiply the base by tera-T1 000 000 000 000 gigaG1 000 000 000 megaM1 000 000 kilok1000 hecto-h100 deca-da10 deci-d0.1 centic0.01 milli-m0.001 micro-u0.000 001 nano-n0.000 000 001 pico-p0.000 000 000 001

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