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Tonne
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The tonne is a unit of mass equal to 1,000 kilograms. It is a non-SI unit accepted for use with SI. It is also referred to as a metric ton in the United States to distinguish it from the non-metric units of the short ton and the long ton. It is equivalent to approximately 2,204.6 pounds, 1.102 short tons, and 0.984 long tons. The official SI unit is the megagram (Mg), a less common way to express the same amount.
A one-tonne (1000-kilogram) concrete block
A one-tonne (1000-kilogram) concrete block
Kilogram
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The kilogram is the base unit of mass in the International System of Units (SI), having the unit symbol kg. It is a widely used measure in science, engineering and commerce worldwide, and is often simply called a kilo colloquially. It means 'one thousand grams'.
A series of 5, 2, 1, 0.5 and 0.2 kilogram weights, made out of rusty cast iron
A series of 5, 2, 1, 0.5 and 0.2 kilogram weights, made out of rusty cast iron
The International Prototype of the Kilogram, whose mass was defined to be one kilogram from 1889 to 2019.
The International Prototype of the Kilogram, whose mass was defined to be one kilogram from 1889 to 2019.
A Kibble balance, which was originally used to measure the Planck constant in terms of the IPK, can now be used to calibrate secondary standard weight
A Kibble balance, which was originally used to measure the Planck constant in terms of the IPK, can now be used to calibrate secondary standard weights for practical use.