The Second is a unit of time established by the International System as: “The duration of 9192.631.770 oscillations of the radiation emitted in the transition between the two hyperfine levels of the ground state of the 133 isotope of the cesium atom (133Cs), at a temperature of 0 K. " This definition is included in the scientific and atomic study of said compound, which was used by the indicators of the International System to be the definitive beta of the unit. However, until the end of the 19th century, the path that the sun makes in an arc over the earth was taken into account in a supreme view from the human.
The second according to this calculation was represented by the eighty-six thousand four hundredth part of a half day, that is, from when the sun began to adjoin by one cardinal point, until it sank through the other. Despite the fact that the unit was so imprecise at that time, it was in force for almost 200 years until atomic studies of the science of time came up with an exact concept of what the second is.
In everyday life the term second is part of the time scale in which a minute is equal to sixty seconds, an hour is made up of sixty minutes, that is, three thousand six hundred seconds, and a day is comprised of twenty-four hours or whatever. equals seventy-six thousand eight hundred seconds. The application of the second is generic, however, its accuracy and precision when determining a right moment, an example of this is the taking of the pulse, which is calculated in a certain interval of seconds. In high-speed sports, such as formula 1, in which the positions are so fair, that it is necessary to fragment the unit of the second in milliseconds and nanoseconds to determine the correct squares at the time of the game.
The word Second also refers to a position, after First and before third. On a podium, represented by silver, second is a privileged place, although not with the same honor as coming first.
