Parallel Plate Capacitor (considering the material)
Present value of an annuity due
Heliocentric distance
Townsend avalanche (Townsend discharge)
Cyclic quadrilateral (Ptolemy's theorem)
Magnetic flux through a solenoid
Optimum pyramidal horn antenna - E-field
Area of an arbitrary triangle related to the incircle radius
Degree of Combined Leverage
Malus' law (polarized light)