Spherical wedge (Area of the lune)
Slope
Arithmetic Mean (in Basic Algebra)
Minimum railway curve radius (by the track gauge and the cant)
Hooke's Law (spring)
Albedo - correlation with Absolute Magnitude and Diameter
Achromatic doublet (lens power)
Ghyben-Herzberg relation (Saltwater intrusion)
Volume of a Hemisphere
Density of an ideal gas