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second
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second

Basic SI unit of time, one-sixtieth of a minute. It is defined as the duration of 9,192,631,770 cycles of regulation (periods of the radiation corresponding to the transition between two hyperfine levels of the ground state) of the caesium-133 isotope. In mathematics, the second is a unit (symbol ") of angular measurement, equalling one-sixtieth of a minute, which in turn is one-sixtieth of a degree.

second

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Major, minor, and augmented seconds.

In music, an interval of two diatonic notes. A second is an ‘imperfect interval’ (having ‘major’ and ‘minor’ variants). A major second consists of two semitones (for example, C–D). A minor second consists of one semitone (C–D flat).



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The 360,000-position NC table offers an indexing accuracy of [+ or -]7 arc seconds and an indexing repeatability of [+ or -]3.
He bought numerous top-class horses, including Group 1 winners Bachir, San Sebastian and Dimitrova, while he also purchased the dams of many Group winners including Millenary, Preseli and Ransom O'War, as well as Lady Ambassador, dam of the 1998 Prix Vermeille winner and Arc second Leggera.
Axis positioning accuracy is [+ or -]6 arc seconds; repeatability [+ or -]3 arc seconds.
 
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