The variance is a parameter that describes, in part, either the actual probability distribution of an observed population of numbers, or the theoretical
Center of mass (for two particles)
The center of mass of a distribution of mass in space is the unique point where the weighted relative position of the distributed mass sums to zero.
The Plateau–Rayleigh instability, often just called the Rayleigh instability, explains why and how a falling stream of fluid breaks up into smaller packets
Latent heat is the energy released or absorbed by a body or a thermodynamic system during a constant-temperature process. A typical example is a change of
Varignon's theorem in statics
Torque, moment or moment of force (see the terminology below) is the tendency of a force to rotate an object about an axis. In addition to the tendency to
In the physical sciences, the wavenumber (also wave number) is the spatial frequency of a wave, either in cycles per unit distance or radians per unit
Standard deviation calculator
Calculates the standard deviation (SD) of a series of numbers (x).
In statistics, the standard deviation (SD) is a measure that is used to quantify