Compound pendulum (momemt of inertia)
Link Budget - Received Power
Damping ratio (related to Quality factor)
R-value (insulation) of a multi-layered installation
Electrical Impedance
Gas-discharge tubes (electrical oscillation's frequency)
Mass fraction (relation between mass and molar concentration)
Flattening - 1st variant
Lift-to-Drag Ratio
Archimedean spiral