C'è ancora una differenza tra misurare e calcolare? (1)

[Autom. eng. transl.] It is known and not problematic that the value of a quantity G can generally be obtained either by measuring directly G, thus applying to the object under measurement a G-sensitive instrument, or by calculating the value starting from known values of quantities connected to G through a 'equation. For example, an acceleration can be measured directly with an accelerometer, or it can be calculated from the values of a force and a mass through the second principle of dynamics. It is less obvious that this second method is also a case of measurement, indirect according to traditional terminology, in which the value of the measurand is obtained from a calculation. On the other hand, not every form of computation is, or is part of, an indirect measurement. The distinction between indirect measurement and computation may appear to be only a semantic issue, of interest only for those who write vocabularies, but it is not.