Total Pressure to Static Pressure Ratio - in isentropic flow
Vieta's formulas ( sum of quadratic polynomial roots)
Debt Service Coverage Ratio (DSCR)
Thermodynamic efficiency (Rankine cycle)
Gearing reduction ratio
Radius of a Contact Area between two cylinders with parallel axes
Radius of an inscribed sphere in a circumscribed Regular Octahedron
Coefficient Of Performance for a perfectly reversible cooler
Young's Modulus
Boundary layer thickness (For laminar boundary layers over a flat plate)