The phrase "base quantity" is correct and usable in written English.
It is typically used in scientific contexts to refer to a certain type of quantity that has a particular unit of measurement, such as the meter, gram, or second. For example, "The base quantity of this experiment is the meter."
The selection of a particular power level as a base quantity is usually related to the rating of one of the component items but is arbitrary.
In 1971 a seventh base quantity, amount of substance represented by the mole, was added to the definition of SI.
The inclusion of electrical units into the system was hampered by the customary use of more than one set of units, until 1900 when Giovanni Giorgi identified the need to define one single electrical quantity as a fourth base quantity alongside the original three base quantities.
In 1954 the 10th General Conference on Weights and Measures (CGPM) identified electric current as the fourth base quantity in the practical system of units and added two more base quantities temperature and luminous intensity making six base quantities in all.
These capacities are shown even after the fish are prevented from using non numerical perceptual variables that co-vary with numerosity, suggesting that they can base quantity discrimination on pure numerical information [39].
However, the starting material was completely consumed on increasing the base quantity to two equivalents with 4 isolated via alumina column chromatography in a yield of 88%% (Table 4, entry 4).
The SI is principally based on a system of base quantities, each associated with a unit and a realization.
Derived units are formed by powers, products or quotients of the base units and are unlimited in number; Derived units are associated with derived quantities, for example velocity is a quantity that is derived from the base quantities of time and length which, in SI, has the dimensions metres per second (symbol m/s).
There are 7 base quantities on which international quantities are based.
While automatic Building Information Modeling (BIM) based quantity takeoff is one of the potentially most important and profitable applications for BIM, it is still generally underexplored how BIM models respond when quantity takeoff is its primary use.
We based quantity assessment on independent estimates of the amplitudes of α1 and β1 K-band X rays and their ratios to the amplitude of the coherent scatter peak, giving two calibration lines corresponding to α and βX rays.
