Review of Measurement
The kilogram or kilogramme, (symbol: kg) is the SI base unit of mass. A gram is defined as one thousandth of a kilogram. Conversion of units describes equivalent units of mass in other systems. Kilogram (kg), basic unit of mass in the metric system. A kilogram is very nearly equal (it was originally intended to be exactly equal) to the mass of 1, cubic cm of water. The pound is defined as equal to kg, exactly. The standard for the unit of mass, the kilogram, is a cylinder of platinum-iridium alloy kept by the.
Kilogram kgbasic unit of mass in the measurementt system. A kilogram is very nearly equal it was originally stznds to be exactly equal to the mass measuremenf 1, cubic cm of water. The pound is defined how to make a sports banner equal to 0.
As originally defined, the kilogram was represented in the late 18th century by a solid cylinder of platinum. Measurements of the fkr of a volume of water proved to be imprecise and inconvenient to make, however, and the platinum artifact itself became the standard.
It was superseded in by a standard kilogram, also a solid cylinder, of height equal to its diameter, made of the same platinum-iridium alloy as the bar then in use as the standard for defining the metre. To avoid the problem of having the kilogram defined by an object with a changing mass, the General Conference on Weights and Measures CGPM agreed in to a proposal to begin to redefine the kilogram not by a physical artifact but by a fundamental physical constant.
One joule is equal to one kilogram times metre ig per second squared. See also International System of Units. Kilogram Article Additional Info. Print Cite verified Cite. While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions. Facebook Twitter. Give Feedback External Websites. Let us know if you have suggestions to improve this article requires login.
External Websites. Sizes - Kilogram. The Editors of Encyclopaedia Britannica Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree See Article History.
Read More on This Topic. The standard for the unit of mass, the kilogram, is a cylinder of platinum-iridium alloy kept by the International Bureau of Weights and Learn More in these related Britannica articles: measurement system: Mass: kilogram.
A duplicate hwat the custody of measuremen National Institute of Standards and Technology serves as…. Massin physics, quantitative measure of inertia, a fundamental property of all matter. It is, in effect, the resistance that a body of matter offers to a change in its speed or position upon the application of a force. The greater the mass of a body, the smaller the change….
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Book BK Kilogram KG Tonne (metric ton, kg) T Bale BL Square kilometer KM2 Tube TU Barrel BBL Kilometer KM Vial VIA Bottle BOT Kit KIT Cord CDS Bushel BU Pound LB Weeks WK Box BOX Linear Foot LF Watt W Nanometer NAM Lot LOT Square yard YD2 Can CAN Liter L Cubic yard YD3 Hundred CEN Board Feet MBF Yard YDFile Size: 20KB. Table of Conversion Factors for SI Units. Abbreviation for units of measure are as follows: Unit of measure and abbreviation: (SI): millimeter, mm; centimeter, cm; meter, m; gram, g; kilogram, kg; kiloPascal, kPa; liter, L; milliliter, mL; cubic meter, m 3; Terabecquerel, TBq; Gigabecquerel, GBq; millisievert, mSv; Newton, N; (U.S.): Inch, in; foot, ft; ounce, oz; pound, lb; psig, psi; gallon, gal; cubic . Name of Unit: Symbol: density: kg/m 3: electric charge: coulomb: C (A s) electric potential: volt: V (J/C) energy: joule: J (kg-m 2 /s 2) force: newton: N (kg-m/s 2) frequency: hertz: Hz (s-1) pressure: pascal: Pa (N/m 2) velocity (speed) meters per second: m/s: volume: cubic meter: m 3.
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