Second
The second is the SI base unit of time, symbol s. It defines a duration that is convenient for science and everyday life and provides the standard by which clocks, experiments, and communication systems are synchronized worldwide.
Historically, the second was once defined as 1/86400 of a mean solar day. Since 1967 it has
A minute equals 60 seconds and an hour equals 3,600 seconds. The second is used for timing
As an ordinal, second denotes the position following the first. The term, from Latin secundus via Old
In music, a second is the interval between two adjacent pitches (major or minor). In geometry, an