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...

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...

sciences, a vector quantity (also known as a vector physical quantity, physical vector, or simply vector) is a vector-valued physical quantity. It is typically...

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...

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...

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

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

Scalar quantities or simply scalars are physical quantities that can be described by a single pure number (a scalar, typically a real number), accompanied...

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

sciences, a vector quantity (also known as a vector physical quantity, physical vector, or simply vector) is a vector-valued physical quantity. It is typically...

Quantity calculus is the formal method for describing the mathematical relations between abstract physical quantities. Its roots can be traced to Fourier's...

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

In continuum mechanics, stress is a physical quantity that describes forces present during deformation. For example, an object being pulled apart, such...

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...

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...

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

a physical quantity such as a force or electric charge. Moments are usually defined with respect to a fixed reference point and refer to physical quantities...

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"...

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...

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...

Dimensionless quantities, or quantities of dimension one, are quantities implicitly defined in a manner that prevents their aggregation into units of measurement...

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

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...

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

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

In science, a field is a physical quantity, represented by a scalar, vector, or tensor, that has a value for each point in space and time. An example...

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