Measuring instrument
power(flux of energy) A physical system that exchanges energy may be described by the amount of energy exchanged per time-interval, also called power or flux of energy. (see any measurement device for power below) For the ranges of power-values see: Orders of magnitude (power). Action Action describes energy summed up over the time a process lasts (time integral over energy). Its dimension is the same as that of an angular momentum. A phototube provides a voltage measurement which permits the calculation of the quantized action (Planck constant) of light. Also see photoelectric effect. Mechanics This includes basic quantities found in classical- and continuum mechanics; but strives to exclude temperature-related questions or quantities . Length (distance) Length, distance, or range meter For the ranges of length-values see: Orders of magnitude (leng...