Mass
![A {{cvt|2|kg}} cast iron weight used for [[balance (device for weighing)|balances]]](https://upload.wikimedia.org/wikipedia/commons/0/0a/Poids_fonte_2_kg_03_%28cropped%29.jpg)
The SI base unit of mass is the kilogram (kg). In physics, mass is not the same as weight, even though mass is often determined by measuring the object's weight using a spring scale, rather than balance scale comparing it directly with known masses. An object on the Moon would weigh less than it does on Earth because of the lower gravity, but it would still have the same mass. This is because weight is a force, while mass is the property that (along with gravity) determines the strength of this force.
In the Standard Model of physics, the mass of elementary particles is believed to be a result of their coupling with the Higgs boson in what is known as the Brout-Englert-Higgs mechanism. Provided by Wikipedia
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102Contributors: “...SMITHSONIAN ASTROPHYSICAL OBSERVATORY CAMBRIDGE MASS...”
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104by Shor,Alexander NobleContributors: “...WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS...”
Published 1980
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105by Richardson,Mary JosephineContributors: “...WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS...”
Published 1980
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106by Schroeder,Elizabeth H.Contributors: “...WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS...”
Published 1965
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107by Hays,H. C.Contributors: “...WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS...”
Published 1965
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108by Flood,Roger DonaldContributors: “...WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS...”
Published 1978
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109by Boentgen,Rudolf RContributors: “...TELEDYNE MATERIALS RESEARCH WALTHAM MASS...”
Published 1975
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110by Hershkowitz,Ronald M.Contributors: “...TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MASS...”
Published 1971
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114by Bunker,Andrew F.Contributors: “...WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS...”
Published 1975
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116by Heinmiller,Robert H. , JrContributors: “...WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS...”
Published 1976
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117by Tupper,George H.Contributors: “...WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS...”
Published 1975
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118by Laine,Edward PContributors: “...WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS...”
Published 1978
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119by Moller,Donald A.Contributors: “...WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS...”
Published 1974
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120by Hays,H. C.Contributors: “...WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS...”
Published 1967
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