A physical quantity (or simply quantity) is a property of a material or system that can be quantified by measurement. A physical quantity can be expressed...

number of physical quantities. The first table lists the fundamental quantities used in the International System of Units to define the physical dimension...

analysis of the relationships between different physical quantities by identifying their base quantities (such as length, mass, time, and electric current)...

Quantity or amount is a property that can exist as a multitude or magnitude, which illustrate discontinuity and continuity. Quantities can be compared...

a multiple of the unit of measurement. For example, a length is a physical quantity. The metre (symbol m) is a unit of length that represents a definite...

and expanded. The base quantities of a given system of physical quantities is a subset of those quantities, where no base quantity can be expressed in terms...

extensive property is a physical quantity whose value is proportional to the size of the system it describes, or to the quantity of matter in the system...

divisor quantity, the specific quantity is a massic quantity. If volume is the divisor quantity, the specific quantity is a volumic quantity.[citation...

A physical constant, sometimes fundamental physical constant or universal constant, is a physical quantity that cannot be explained by a theory and therefore...

body or to a physical system, recognizable in the performance of work and in the form of heat and light. Energy is a conserved quantity—the law of conservation...

To calculate the value of stochastic health risk in sieverts, the physical quantity absorbed dose is converted into equivalent dose and effective dose...

quantifiable physical property is called physical quantity. Measurable physical quantities are often referred to as observables. Some physical properties...

measurement adopted for a base quantity. A base quantity is one of a conventionally chosen subset of physical quantities, where no quantity in the subset can be...

In physics, scalars (or scalar quantities) are physical quantities that are unaffected by changes to a vector space basis (i.e., a coordinate system transformation)...

Temperature is a physical quantity that quantitatively expresses the attribute of hotness or coldness. Temperature is measured with a thermometer. It...

In physics, an observable is a physical property or physical quantity that can be measured. In classical mechanics, an observable is a real-valued "function"...

This is a list of common physical constants and variables, and their notations. Note that bold text indicates that the quantity is a vector. List of letters...

corresponding to seven base physical quantities. They are the second, with the symbol s, which is the SI unit of the physical quantity of time; the metre, symbol...

It is a vector quantity, possessing a magnitude and a direction. If m is an object's mass and v is its velocity (also a vector quantity), then the object's...

equilibrium. Physical quantity A physical quantity is a property of a material or system that can be quantified by measurement. A physical quantity can be expressed...

"intensity" of a specified physical quantity is inversely proportional to the square of the distance from the source of that physical quantity. The fundamental...

the material derivative describes the time rate of change of some physical quantity (like heat or momentum) of a material element that is subjected to...

international standard ISO 31 on quantities and units. It provides guidelines for using physical quantities, quantity and unit symbols, and coherent unit...

constants listed here are known values of physical constants expressed in SI units; that is, physical quantities that are generally believed to be universal...

(physics), a physical quantity that can be described by a single element of a number field such as a real number Lorentz scalar, a quantity in the theory...

Carathéodory wrote: "There exists a physical quantity called heat that is not identical with the mechanical quantities (mass, force, pressure, etc.) and...

this quantity. Every physical quantity has a Hermitian linear operator associated to it, and the states where the value of this physical quantity is definite...

processing, signals are analog and digital representations of analog physical quantities. In information theory, a signal is a codified message, that is,...

axis) Spectrogram of dolphin vocalizations In the physical sciences, the spectrum of a physical quantity (such as energy) may be called continuous if it...

In physics, a field is a physical quantity, represented by a scalar, vector, or tensor, that has a value for each point in space and time. A weather map...