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The mass of this pen cap is about 1 gram. A weight scale such as this can give an accurate reading of mass for many objects (see Weight vs. mass).
The mass of this pen cap is about 1 gram. A weight scale such as this can give an accurate reading of mass for many objects (see Weight vs. mass).
One gram of amphetamines (the unit often used for street retail)
One gram of amphetamines (the unit often used for street retail)
A container of Wellcome-brand cocaine, containing 1 ounce or 28.3 grams (note the non-standard abbreviation gm.).
A container of Wellcome-brand cocaine, containing 1 ounce or 28.3 grams (note the non-standard abbreviation gm.).
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Silicon sphere for the Avogadro project used for measuring the Avogadro constant to a relative standard uncertainty of 2×10−8 or less, held by Achim L
Silicon sphere for the Avogadro project used for measuring the Avogadro constant to a relative standard uncertainty of 2×10−8 or less, held by Achim Leistner
Stone marking the Austro-Hungarian/Italian border at Pontebba displaying myriametres, a unit of 10 km used in Central Europe in the 19th century (but
Stone marking the Austro-Hungarian/Italian border at Pontebba displaying myriametres, a unit of 10 km used in Central Europe in the 19th century (but since deprecated)
Closeup of the National Prototype Metre, serial number 27, allocated to the United States
Closeup of the National Prototype Metre, serial number 27, allocated to the United States