Kilogram - Wikipedia
Kilogram' means 'one thousand grams' [2] and is colloquially abbreviated to kilo. [3] The kilogram is an SI base unit, defined ultimately in terms of three defining constants of the SI, namely a specific transition frequency of the caesium-133 atom, the speed of light, and the Planck constant.
Kilogram: Introduction | NIST - National Institute of Standards …
2018年5月14日 · For more than a century, the kilogram (kg) — the fundamental unit of mass in the International System of Units (SI) — was defined as exactly equal to the mass of a small polished cylinder, cast in 1879 of platinum and iridium.
Kilogram Definition & Meaning - Merriam-Webster
The meaning of KILOGRAM is the base unit of mass in the International System of Units that is defined by setting the fixed numerical value of Planck's constant to 6.62607015 x 10—34 joule seconds. How to use kilogram in a sentence.
What Is a Kilogram? The Answer Just Changed, and Here's Why | TIME
2018年11月16日 · But, while something that weighs a kilogram — the basic unit of mass — is just as heavy as it was before, the way that kilogram is defined has changed, after a vote by scientists at the General...
Kilogram | mass, weight, SI unit | Britannica
4 天之前 · 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 1,000 cubic cm of water. The pound is defined as equal to 0.45359237 kg, exactly.
kilogram - Metric System
The kilogram, symbol kg, is the SI base unit of mass. The kilogram is defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 × 10 −34 when expressed in the unit J s, which is equal to kg m 2 s −1, where the metre and second are defined in …
Kilogram - Simple English Wikipedia, the free encyclopedia
The kilogram [b] is the base unit of mass in the International System of Units (SI). It is widely used in science , engineering , and commerce worldwide. The kilogram is exactly the mass of one litre of water.
Kilogram - Kilogram Definition and Conversions of Kilogram
Learn more about the unit of mass, kilogram and its definition. Find out how to convert kilograms to grams, milligrams, pounds, ounces and tons using examples.
KILOGRAM Definition & Meaning | Dictionary.com
a unit of mass equal to 1,000 grams: the basic unit of mass in the International System of Units (SI). Up until 2019 the kilogram was defined as equal to the mass of an international prototype, …
Kilogram - Definition, Usage, Conversion Table, Applications
2024年7月15日 · The kilogram is the base unit of mass in the International System of Units (SI), representing the mass of the international prototype of the kilogram. It is defined by the mass of the platinum-iridium alloy cylinder kept at the International Bureau of Weights and Measures (BIPM) in France.
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