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International System of Units (view source)
Revision as of 22:36, April 26, 2007
, 22:36, April 26, 2007→Obsolete metric units
* The '''curie''' (symbol Ci, for [[Marie Curie]]) is an obsolete unit of radioactivity. Its original definition was "the amount of radioactivity in one gram of [[radium]]-226." Madame Curie, of course, is most famous as the discoverer of radium. It was replaced by the becquerel, though it is still widely used in the US nuclear power industry. One curie is equal to 3.7 * 10<sup>10</sup> becquerel.
* The '''curie''' (symbol Ci, for [[Marie Curie]]) is an obsolete unit of radioactivity. Its original definition was "the amount of radioactivity in one gram of [[radium]]-226." Madame Curie, of course, is most famous as the discoverer of radium. It was replaced by the becquerel, though it is still widely used in the US nuclear power industry. One curie is equal to 3.7 * 10<sup>10</sup> becquerel.
* The '''micron''' (symbol µ) was a unit of length equal to one thousandth of a millimeter. It was replaced by the micrometer (symbol µm) in 1960.
* The degree Centigrade (symbol °C) was renamed the degree Celsius (symbol °C) in 1960.
==Metric Prefixes==
==Metric Prefixes==