Damping ratio (related to the percentage overshoot)
Vegard's law
Compound lens' focal length (separated in air by some distance )
Fin Area on a Rocket
Envy ratio
Vertical Pressure variation of the Atmosphere of Earth( exponential function of height)
Law of Conservation of Mechanical Energy - General version
Resonant frequency of string
Available NPSH in turbine (Net Positive Suction Head)
FEV1/FVC ratio (FEV1%)