In graph theory, the connectivity of a graph.
In differential geometry, the curvature of a curve.
In linear algebra, the condition number of a matrix.
In cosmology, the Einstein gravitational constant.
In physics, the torsional constant of an oscillator.
In physics, the coupling coefficient in magnetostatics.
In physics, the dielectric coefficient.
In fluid dynamics, the von Kármán constant.
Thermal conductivity.
In thermodynamics, the compressibility of a compound.