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METROLOGY - RTC, Regional Training Centre - Turkey

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<strong>METROLOGY</strong><br />

Mass Unit and Mass Prototype<br />

Kilogram of mass units;<br />

The kilogram is defined as the weight of<br />

the alloy that is made of %90 Platinum-<br />

%10 Iridium and it’s shape is a cylinder<br />

with 39 mm diameter and 39 mm height.<br />

The density of this cylinder is 21500kg/m3<br />

density.<br />

12/10

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