particular material object of the system and the
influence of phenomena or processes.
Unit of physical quantity- these are physical
quantities of fixed size that are conventionally pressed
numerical value of different units and used for
quantitative expression of homogeneous physical
quantities with it.
The value of physical quantity- this is an estimate
of its size in the form of a certain number of units
taken for it.
The numerical value of a physical quantity- this is
an abstract number expressing the ratio of the value of
the corresponding unit of a given physical quantity.
With the chosen evaluation of the physical
quantity, it characterizes the true real and the
measurement by the value.
The true value of a physical quantity calls a value
that would ideally reflect in qualitative and
quantitative terms with the corresponding properties
of the object. The roots value refer to the category of
absolute truth and can not be obtained in practice
since any measurement is accompanied by industry.
Therefore, in practice , he is replaced by a real
value.
The actual value of a physical quantity-
experimental way the value of the value and so close
to the true value that for a specific purpose can be
used together.
THE SYSTEM OF UNITS OF PHYSICAL
QUANTITIES
Units of physical quantities are divide into basic
and product and combine in the system of units of
physical
quantities.
Basic
units
are
chosen
justification arbitrarily. Derivative units express
through the basic on the basis of known equations the
relationship between them.
The set of basic and derived units of physical
quantities formed in accordance with accepted
principles is the system of units of physical quantities.
The unit of the basic physical quantity is the basic unit
of the system.
The international system of units was with the
adoption of the 9 General Conference on Measures
and Weights in 1960. And refined in subsequent
GKMB.
In the basic of the system are all provisions of the
7 basic physical units of a kilogram, second, ampere,
kelvin, mole, and candela. In 1995, there were still
additional units of a unit of a flat and solid angle-
radian and steradian wear adornments to the system,
this is the XX GKMB white ghost in which the
category of dimensionless derivatives units of units is
SI.
System units-the unit is the physical quantity
entering the system of units.
Extra system unit-a unit of physical quantity is not
included in the acceptance system of units. Units of
the system and extrasystem units allowed to the
variables in Uzbekistan rules for the formation of
multiples and subunits , the name and designation of
units and the rules for their application of the
establishment of state standards by the association in
UzDSt 012:2005.
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