APPLICATIONS OF THE TIME LAW (tu = gΔb, x)

- gΔb (sundial, rotation of the Earth), x (sunrise).
- gΔb (candle), x (lit of candle).
- gΔb (hourglass), x (rotation of the vials).
- gΔb (digital clock, rotation of the Earth), x (midnight, the time o'clock).
- gΔb (calendar, translation of the Earth), x (midnight of December 31).
- gΔb (stopwatch), x (zero).
- gΔb (timer), x (set time).

The operation of these devices is governed by the equation "tu = gΔb, x".
There is a kind of variable becoming, as in biological phenomena, a storm, the current of a river, etc.. that isn't suitable for measuring time.