Body Mass Index - BMI (for pounds and inches)
Ellipse Circumference (Ramanujan formula)
Ripple factor
Borda–Carnot equation
Energy–Maneuverability Theory (aircraft performance)
Law of dilution of a weak electrolyte (Ostwald)
Hemispherical Reflectance
Speed of Sound (air, ideal gases)
Perimeter of Rectangle
Rankine Gordon formula (Maximum axial load that a column will buckle)