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en.wikipedia.org/wiki/SI_base_unit

The International System of Units (SI) defines seven units of measure as a basic set from which all other SI units can be derived. The SI base units and their physical quantities are the metre for measurement of length, the kilogram for mass, the second for time, ...

en.wikipedia.org/wiki/Mass

In physics, mass is a property of a physical body. It is the measure of an object's resistance to ... The standard International System of Units (SI) unit of mass is the kilogram (kg). The kilogram is 1000 grams (g), first defined in 1795 as one cubic ...

www.nist.gov/pml/weights-and-measures/si-units-mass

Mar 30, 2011 ... The kilogram is the SI base unit of mass and is equal to the mass of the ... middle school students learn about the 7 SI base measurement units.

physics.nist.gov/cuu/Units/units.html

The SI is founded on seven SI base units for seven base quantities assumed to be ... 1 for quantities of dimension 1 such as mass fraction is generally omitted.

www.french-metrology.com/en/si/units-measurement.asp

... of Units (SI): base units of measurement and derived units, definitions, prefixes, ... kilogram (kg), The kilogram is the mass of the platinum-iridium prototype ...

www.boundless.com/chemistry/textbooks/boundless-chemistry-textbook/introduction-to-chemistry-1/units-of-measurement-29/standard-units-si-units-183-3710

Learn more about standard units (si units) in the Boundless open textbook. ... Every field of science involves taking measurements, understanding them, and ... the kilogram (kg), for mass; the second (s), for time; the kelvin (K), for temperature  ...

chemed.chem.purdue.edu/genchem/topicreview/bp/ch1/index.php

... for the Metric System. The seven base units for the SI system are given below. SI Base Units ... mass, kilogram, kg. time, second, s.

www.npl.co.uk/reference/measurement-units/si-base-units

Learn more about measurement units and how to use them with NPL e-Learning ... The kilogram (kg). The kilogram is the SI base unit of mass. More ...

www.npl.co.uk/reference/measurement-units/si-base-units/the-kilogram

Oct 8, 2010 ... The kilogram is the International System of Units (SI) unit for mass. It is the only remaining base unit to be defined by a physical object.

www.si-units-explained.info/mass

As civilizations grew they each adopted standards for measuring weight, or as we will shortly see, mass. Today we use the kilogram (1000 grams) as the ...