the class of components which are based on rotational motion
the speed at which the rotary part of the component rotates
(Forall (?Self ?Time)
(<=> (Active ?Time Rotating-Component ?Self)
(And (Rotating-Component ?Self)
(Active ?Time Thermal-Component ?Self))))
(=> (Rotating-Component ?Self)
(Quantity.Dimension (Rotating-Speed ?Self) Frequency-Dimension))