Pressure to depth (empirical formula - fresh water)
Supercsapacitor - Time to deliver a Constant Power
Relation among Young's modulus, Bulk modulus and Poisson's ratio
Menelaus' theorem ( transversal line passes inside triangle )
Relation between permeability and magnetic susceptibility
Rossby Number
Wheel flop
Supersonic/Hypersonic Lift-to-Drag Ratio
Orbital Period - as a function of central body's density
Pitch diameter - in metric units (gears)