S is 19 in the Latin alphabet. S has different meanings in different places. For example, in physics, S means second, and second is the unit of time.

S is a statistical programming language in computer; Selina is in s.h.e；; In the Hollywood movie Superman, it is a symbol of American hero Superman Family and also a symbol of Krypton's hope.

Extended data:

In mathematics

1. Example of graphic area in geometric representation: S△=? ah

2, in statistics, said the standard deviation, s? It means variance.

Timing unit

In physics, lowercase s is the symbol of seconds, and seconds are the unit of time.

Electric unit

1, susceptance refers to the imaginary part of a circuit represented by a complex number, and is defined as follows: Y=G jB. Here y is admittance, g is the real part, called conductance, and b is susceptance. The unit of susceptance is Siemens (S).

2. Siemens (conductance, susceptance and admittance, three units of immittance) is expressed in the international system of units.

chemical unit

1, which means solubility in chemistry, comes from the English name of solubility.

2. In chemistry, S stands for solid, which is sometimes marked in the reaction equation.