Physical Quantity definition of Physical Quantity in the Free Online Encyclopedia.

Physical Quantity

an attribute that, in a qualitative respect, is a universal characteristic of many physical objects—that is, of physical systems, states of such systems, and processes occurring in such systems—but, in a quantitative respect, is independent for every object. Length, mass, and electrical resistance are examples of physical quantities that characterize the properties of objects; pressure, temperature, and magnetic induction are some of the physical quantities that characterize the state of a system; velocity and power are two of the physical quantities that characterize processes.

Various measurement methods are used for the quantitative evaluation of a physical quantity, that is, for determining the value of a physical quantity as a certain number of the units adopted for the quantity. Letter symbols are assigned to the physical quantities used in the equations of physics that express the relationships between the quantities in physical objects.

The term “physical quantity” is used not only in physics but also in other sciences, such as chemistry and biology, when a quantitative comparison of the properties of objects under study is performed by physical methods (seeMETROLOGY and DIMENSIONS).

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No references found	report that by weighing the kilogram against an electromagnetic force, they have measured a fundamental physical quantity, known as the Planck constant, with twice the precision of previous experiments. A step closer to an atomic-based kilogram? by Weiss, Peter Ulrich / Science News	physical handicap physical input/output control system Physical Kinetics physical law physical layer physical libration of the moon physical link physical lock physical measurement physical medicine physical medicine and rehabilitation physical memory physical memory address physical metallurgy physical meteorology Physical Modeling physical modeling synthesis physical network physical oceanography physical optics physical organic chemistry physical path length Physical Perfection Physical Problems, Institute of physical property Physical Quantity physical realizability physical record physical residue physical science Physical Sequential physical stability physical stratigraphy physical system physical testing physical theory Physical Therapy physical time Physical Training, Military Physical Transport Network Physical Units physical vapor deposition physical weathering Physical-Culture and Sports Press Physicalism Physician physician assistant physician's assistant Physician, Authorized physicist Physick, Philip Syng	Physical point Physical Point of Attachment physical power Physical Problems, Institute of physical process Physical processe Physical processe Physical processe Physical processe Physical Profile Physical Profile Serial Code Physical Progress Review Physical properties Physical properties Physical Properties Measurement System physical properties of bone physical properties of bone physical properties of bone Physical Properties of Earth Materials physical property physical property Physical Protection System Physical protocol layer Physical Prototyping Team Physical punishment Physical punishment Physical punishment Physical punishment Physical quality of life index Physical quantities Physical Quantity Physical Random Access Channel Physical Readiness Information Management System Physical Readiness Test Physical Readiness Training physical realizability physical record Physical Region Descriptor physical rehabilitation physical rehabilitation physical rehabilitation Physical Research Laboratory Physical Residual Functional Capacity physical residue Physical Resource Block physical restoration Physical restraint Physical restraint Physical restraint Physical restraint Physical Review A Physical Review A Online Physical Review B Physical Review C Physical Review D Physical Review E Physical Review Letters Physical Review Letters-Online Physical Review Online Archive Physical Review Special Topics

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report that by weighing the kilogram against an electromagnetic force, they have measured a fundamental physical quantity, known as the Planck constant, with twice the precision of previous experiments.

A step closer to an atomic-based kilogram? by Weiss, Peter Ulrich / Science News

physical handicap

physical input/output control system

Physical Kinetics

physical law

physical layer

physical libration of the moon

physical medicine and rehabilitation