搜尋結果
International System of Units
- The International System of Units (SI), commonly known as the metric system, is the international standard for measurement. The International Treaty of the Meter was signed in Paris on May 20, 1875 by seventeen countries, including the United States and is now celebrated around the globe as World Metrology Day.
www.nist.gov/pml/owm/metric-si/si-unitsSI Units | NIST - National Institute of Standards and Technology
其他人也問了
What is the metric system?
What metric units were used in the early metric system?
When was the metric system invented?
What are the units of measure in the metric system?
The metric system is a decimal -based system of measurement. The current international standard for the metric system is the International System of Units (Système international d'unités or SI), in which all units can be expressed in terms of seven base units: the metre, kilogram, second, ampere, kelvin, mole, and candela .
- International System of Units - Wikipedia
The International System of Units, internationally ...
- System of units of measurement - Wikipedia
A system of units of measurement, also known as a ...
- History of the metric system - Wikipedia
This article is about the history of the standards used ...
- Metric system - Simple English Wikipedia, the free encyclopedia
The metric system is a number of different systems of ...
- International System of Units - Wikipedia
公制 (法語: Système métrique ,英語: metric system )又譯 米制 ,是一個國際化 十進位 量度系統。 法國 在1799年開始使用公制,是第一個使用公制的國家。 源自公制的 國際單位制 已成為國際大多數國家的主要量度系統。 美國 是現今工業化國家中唯一未將國際單位制定義為官方量度系統的國家,不過自從1866年起也已開始在科研、醫療和軍事領域使用國際單位制 [1] 。 英國 政府已承諾將許多量測單位改為公制系統,但民間還沒有普遍使用,一般常用的單位仍是 英制單位 。 設置公制系統的原意是制訂一個所有人都可以使用的系統,但為了政府或標準管理機構管理的需要,公制系統設置過程中仍然有對應標準單位(如長度一米或質量一公斤)的公制系統原器。
Metric system, international decimal system of weights and measures, based on the meter for length and the kilogram for mass, that was adopted in France in 1795 and is now used officially in almost all countries. The metric system was later extended as the International System of Units (SI).