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Measurable property of a material or system
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
Physical_quantity
This article consists of tables outlining a number of physical quantities. A physical quantity is a property of a material or system that can be quantified
List_of_physical_quantities
Analysis of the dimensions of different physical quantities
science, dimensional analysis of different physical quantities is the analysis of their physical dimension or quantity dimension, defined as a mathematical
Dimensional_analysis
Property of magnitude or multitude
many), the two principal types of quantities, are further divided as mathematical and physical. In formal terms, quantities—their ratios, proportions, order
Quantity
System of quantities used in science and their interrelationships
revised and expanded. The base quantities of a given system of physical quantities form a subset in which no base quantity can be expressed in terms of
International System of Quantities
International_System_of_Quantities
Physical quantity that is a vector
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
Vector_quantity
Properties independent of system size, and proportional to system size
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
Intensive and extensive properties
Intensive_and_extensive_properties
Physical quantity with no units
Dimensionless quantities, or quantities of dimension one, are quantities with no associated units of measurement. These may be ratios of quantities with the
Dimensionless_quantity
Quantity standard
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
Unit_of_measurement
One-dimensional physical quantity
Scalar quantities or simply scalars are physical quantities that can be described by a single pure number (a scalar, typically a real number), accompanied
Scalar_(physics)
Broad concept generalizing scalars in mathematics and physics
number. It may denote a vector quantity, i.e., physical quantity that cannot be expressed by a single scalar quantity. The term may also be used to refer
Vector (mathematics and physics)
Vector_(mathematics_and_physics)
Magnitude or dimension of a thing
measuring objects, which results in the determination of the magnitude of a quantity, such as length or mass, relative to a unit of measurement. Such a magnitude
Size
Mass per unit volume
generalized in the International System of Quantities to volumic quantities, the quotient of any physical quantity and volume, such as charge density or volumic
Density
Attribute of a physical system or body or non-chemical property of a material
quantifiable physical property is called physical quantity. Measurable physical quantities are often referred to as observables. Some physical properties
Physical_property
Physical quantities taking values at each point in space and time
In science, a field or field quantity is a physical quantity – represented by a scalar, vector, spinor, or tensor – that has a value for each point in
Field_(physics)
Universal and unchanging physical quantity
A physical constant is a non-varying quantity that appears in a theory or model of some physical phenomena. Some physical constants appear in models of
Physical_constant
Any entity that can be measured
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"
Observable
Time rate of change of some physical quantity of a material element in a velocity field
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
Material_derivative
Modern form of the metric system
seven units to serve as base units, corresponding to seven base physical quantities. They are the second for time, metre for length, kilogram for mass
International_System_of_Units
Product of a distance and physical quantity
and a physical quantity such as a force or electric charge. Moments are usually defined with respect to a fixed reference point and involve physical quantities
Moment_(physics)
Derived SI unit of equivalent dose of ionizing radiation
To calculate the value of stochastic health risk in sieverts, the physical quantity absorbed dose is converted into equivalent dose and effective dose
Sievert
Physical quantity
body or to a physical system, recognizable in the capacity to do work and in the form of heat and light. Energy is a conserved quantity – the law of conservation
Energy
Physical law
the value of the physical quantity) is inversely proportional to the square of the distance from the source of that physical quantity. The fundamental
Inverse-square_law
Type of energy transfer
Carathéodory wrote: "There exists a physical quantity called heat that is not identical with the mechanical quantities (mass, force, pressure, etc.) and
Heat
Process of assigning numbers to objects or events
process of determining how large or small a physical quantity is as compared to a basic reference quantity of the same kind. The scope and application
Measurement
Unit of measurement adopted by convention for a base quantity
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
Base_unit_of_measurement
Concept relating to waves and signals
axis) Spectrogram of dolphin vocalizations In the physical sciences, the spectrum of a physical quantity (such as energy) may be called continuous if it
Spectrum_(physical_sciences)
Quotient of a quantity by mass
specific or massic typically indicates an intensive quantity obtained by dividing an extensive quantity of interest by mass. For example, specific leaf area
Specific_quantity
Physical quantity conserved throughout a motion
In mechanics, a constant of motion is a physical quantity conserved throughout the motion, imposing in effect a constraint on the motion. However, it
Constant_of_motion
Superseded standard on quantities and units
(Quantities and units, International Organization for Standardization, 1992) is a superseded international standard concerning physical quantities, units
ISO_31
Physical quantity that expresses internal forces in a continuous material
In continuum mechanics, stress is a physical quantity that describes forces present during deformation. For example, an object being pulled apart, such
Stress_(mechanics)
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
List of common physics notations
List_of_common_physics_notations
Varying physical quantity that conveys information
processing, signals are analog and digital representations of analog physical quantities. In information theory, a signal is a codified message, that is,
Signal
Visible light per unit solid angle
not the same as the radiant intensity, the corresponding objective physical quantity used in the measurement science of radiometry. Like other SI base
Luminous_intensity
Geometric object that has length and direction
be added and scaled to form a vector space. A vector quantity is a vector-valued physical quantity, including units of measurement and possibly a support
Euclidean_vector
Measure of distance in physical space
Length is a measure of distance. In the International System of Quantities, length is a quantity with dimension distance. In most systems of measurement a base
Length
Amount of energy transferred or converted per unit time
watt (symbol W), equal to one joule per second (J/s). Power is a scalar quantity. The output power of a motor is the product of the torque that the motor
Power_(physics)
Defined standard of a physical quantity
experiment that bears a defined relationship to a unit of measurement of a physical quantity. Standards are the fundamental reference for a system of weights and
Standard_(metrology)
Physical quantity of interest in chemistry and electrodynamics
The mass-to-charge ratio (m/Q) is a physical quantity relating the mass (quantity of matter) and the electric charge of a given particle, expressed in
Mass-to-charge_ratio
In physics, there are equations in every field to relate physical quantities to each other and perform calculations. Entire handbooks of equations can
Lists_of_physics_equations
Topics referred to by the same term
is a physical quantity that expresses hot and cold. Temperature may also refer to: Atmospheric temperature Thermodynamic temperature, a quantity defined
Temperature_(disambiguation)
Description of physical properties at the atomic and subatomic scale
(wave–particle duality), and there are limits to how accurately the value of a physical quantity can be predicted prior to its measurement, given a complete set of
Quantum_mechanics
Method to measure temperature quantitatively
temperature or temperature scale is a methodology of calibrating the physical quantity temperature in metrology. Empirical scales measure temperature in
Scale_of_temperature
Concept in physics
mass-specific quantity defined as the quotient of force per unit mass. S F = F / m {\displaystyle \mathrm {SF} =F/m} It is a physical quantity of kind acceleration
Specific_force
Cosmological formulas for expanding universe
events in an expanding universe. They may be used to tie some observable quantity (such as the luminosity of a distant quasar, the redshift of a distant
Distance_measure
Standardized quantities and units
international standard ISO 31 on quantities and units. It provides guidelines for using physical quantities, quantity and unit symbols, and coherent unit
ISO_31-0
Property of a mass in motion
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
Momentum
Mass per unit area
sizes ("basis ream"). A generalized areic quantity is defined as the quotient of a generic physical quantity by area, such as surface charge density or
Area_density
Measure of sustained displacement of an object from a reference position
controllers are controllers that work on a signal that is proportional to a physical quantity (e.g. displacement, proportional to position) and its integral(s)
Absement
Mathematical structures that allow quantum mechanics to be explained
from those used in previous models of physical reality. While the mathematics permits calculation of many quantities that can be measured experimentally
Mathematical formulation of quantum mechanics
Mathematical_formulation_of_quantum_mechanics
One of the seven units of measurement that define the metric system
from which all other SI units can be derived. The units and their physical quantities are the second for time, the metre (also spelled meter) for length
SI_base_unit
Mathematical relations between abstract physical quantities
Quantity calculus is the formal method for describing the mathematical relations between abstract physical quantities. Its roots can be traced to Fourier's
Quantity_calculus
Magnitude of velocity
seismology, slowness (symbol p or s) is a physical quantity defined as the reciprocal of velocity, p=v−1. It has quantity dimension (and unit of measurement)
Speed
Spatial frequency of a wave
is defined as the number of wave cycles divided by length; it is a physical quantity with dimension of reciprocal length, expressed in SI units of cycles
Wavenumber
Method in physics used to deal with infinities
Renormalization procedures are based on the requirement that certain physical quantities (such as the mass and charge of an electron) equal observed (experimental)
Renormalization
Integral of a comparatively larger force over a short time interval
impacts and collisions, for which it gets its namesake. Impulse is a vector quantity, meaning it has both a magnitude, which describes the amount by which the
Impulse_(physics)
Device for measuring a physical quantity
a physical quantity. In the physical sciences, quality assurance, and engineering, measurement is the activity of obtaining and comparing physical quantities
List_of_measuring_instruments
Assignment of numbers to points in space
possibly physical space. The scalar may either be a pure mathematical number (dimensionless) or a scalar physical quantity (with units). In a physical context
Scalar_field
Measure of radiant energy over time
(heat transfer) "Thermal insulation — Heat transfer by radiation — Physical quantities and definitions". ISO 9288:1989. ISO catalogue. 1989. Retrieved 2015-03-15
Radiant_flux
Units defined only by physical constants
quantity. If, by a shorthand convention, it is understood that each physical quantity is the corresponding ratio with a coherent Planck unit (or "expressed
Planck_units
Physical quantity of rough surfaces
Normal contact stiffness is a physical quantity related to the generalized force displacement behavior of rough surfaces in contact with a rigid body
Normal_contact_stiffness
Physical quantity in radiometry
is a directional quantity: the radiance of a surface depends on the direction from which it is being observed. The related quantity spectral radiance
Radiance
Gradient whose components are spatial derivatives
derivatives, i.e., rate of change of a given physical quantity with respect to the position coordinates in physical space. Homogeneous regions have spatial
Spatial_gradient
Physical quantity that changes sign with improper rotation
In physics and mathematics, a pseudovector (or axial vector) is a quantity that transforms like a vector under continuous rigid transformations such as
Pseudovector
Relationship between two numbers of the same kind
definition adopted in physical sciences (especially in metrology) for ratio is the dimensionless quotient between two physical quantities measured with the
Ratio
Act of placing two elements side by side
used for "multiplication" of a numerical value and a physical quantity, and of two physical quantities, for example, three times π {\displaystyle \pi } would
Juxtaposition
Measurement describing the power of an illumination
due to the source's temperature. Color Lighting Photometry (optics) Physical quantity Radiometry Spectral density estimation Mark D. Fairchild (2005). Color
Spectral_power_distribution
Physical quantity of hot and cold
view associated with the continuity of classical physical quantities, which states that physical quantities must assume every intermediate value between a
Temperature
Unit of measurement of optical power
express the optical power of a lens or curved mirror, which is a physical quantity equal to the reciprocal of the focal length, expressed in metres.
Dioptre
Mathematical result of division
percent) is a "ratio". Specific quantities are intensive quantities resulting from the quotient of a physical quantity by mass, volume, or other measures
Quotient
Influence on an oscillating physical system which reduces or prevents its oscillation
engineering, structural engineering, and electrical engineering. The physical quantity that is oscillating varies greatly, and could be the swaying of a
Damping
Branch of physics which studies the behavior of materials modeled as continuous media
there is a source of the physical quantity on the surface of the volume, or/and, there is a source of the physical quantity inside the volume. Let Ω {\displaystyle
Continuum_mechanics
Velocity at which the overall shape of a wave's amplitudes propagates
cases the group velocity may not be a well-defined quantity, or may not be a meaningful quantity. In his text "Wave Propagation in Periodic Structures"
Group_velocity
Scientific instrument to measure gradients from physical properties
is a scientific instrument for measuring the spatial gradient of a physical quantity (i.e., its rate of change with respect to position coordinates), such
Gradiometer
Scientific law regarding conservation of a physical property
conservation law. Other conserved quantities can exist as well. Conservation laws are fundamental to our understanding of the physical world, in that they describe
Conservation_law
Unit of energy
also sometimes used denoting 1/1000 toe. A related concept is the physical quantity oil-equivalent mass (or mass of oil equivalent), expressed in the
Tonne_of_oil_equivalent
Topics referred to by the same term
(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
Scalar
Measure of distance to normality
information theory. A similar physical quantity was introduced in 1869 by Massieu for the isothermal process (both quantities differs just with a figure
Negentropy
Operator in quantum mechanics
canonical momentum, which is not gauge invariant and not a measurable physical quantity for charged particles in an electromagnetic field. In that case, the
Momentum_operator
Ratio of a fluid's advective and diffusive transport rates
ratio of the rate of advection of a physical quantity by the flow to the rate of diffusion of the same quantity driven by an appropriate gradient. In
Péclet_number
Mathematical concept applicable to physics
all cases the frequent symbol j, (or J) is used for flux, q for the physical quantity that flows, t for time, and A for area. These identifiers will be
Flux
Assignment of a vector to each point in a subset of Euclidean space
measurement (for example, metres or kilometres per hour), forming a vector physical quantity. They may be used to model, for example, the speed and direction of
Vector_field
Amount of matter present in an object
Mass is an intrinsic physical quantity of a body which in modern physics is generally defined as the strength of an object's gravitational attraction
Mass
Temperature difference per unit of length
A temperature gradient is a physical quantity that describes in which direction and at what rate the temperature changes the most rapidly around a particular
Temperature_gradient
Change in velocity per amount of fuel
Specific impulse (usually abbreviated as Isp) is a physical quantity defined as the ratio of change in momentum (impulse) to the mass used, usually fuel
Specific_impulse
Law concerning X-rays emitted by atoms
periodic table and was not known to be associated with any measurable physical quantity. In brief, the law states that the square root of the frequency of
Moseley's_law
Power carried by sound waves
air at a listener's location as a sound energy quantity. Sound intensity is not the same physical quantity as sound pressure. Human hearing is sensitive
Sound_intensity
International standard on physical quantities and units of measurement
Electrotechnical Commission (IEC). It serves as a style guide for using physical quantities and units of measurement, formulas involving them, and their corresponding
ISO/IEC_80000
Topics referred to by the same term
probability theory and statistics Moment (physics), a combination of a physical quantity and a distance Moment of force or torque Present time An instant Moment
Moment
Product of a number by itself
area-dimensioned quantity kinetic energy (quadratic dependence on velocity) specific energy, a (square velocity)-dimensioned quantity Weisstein, Eric W
Square_(algebra)
and statistics, and measures information with several quantities of information, where quantity is a property that can be quantified by measurement. The
Quantities_of_information
Representation of mechanical stress at every point within a deformed 3D object
point under consideration. However, the stress tensor itself is a physical quantity and as such, it is independent of the coordinate system chosen to
Cauchy_stress_tensor
Type of wave propagating in 3 dimensions
In physics, a plane wave is a special case of a wave or field: a physical quantity whose value, at any given moment, is constant through any plane that
Plane_wave
Class of units of measurement for explosive energy
explosives such as dynamite contain more energy. A related concept is the physical quantity TNT-equivalent mass (or mass of TNT equivalent), expressed in the
TNT_equivalent
Statement based on repeated empirical observations that describes some natural phenomenon
The state of a physical system, be it a particle or a system of many particles, is described by a wavefunction. Every physical quantity is described by
Scientific_law
Device that converts energy from one form to another
transducers convert physical quantities into mechanical outputs or vice versa; Electrical transducers convert physical quantities into electrical outputs
Transducer
Type of observable in a physical system
Conservation law Conserved quantity Covariance group General covariance Eigenvalues and eigenvectors Invariants of tensors Killing form Physical constant Principle
Invariant_(physics)
Coenergy (or co-energy) is a non-physical quantity, measured in energy units, used in theoretical analysis of energy in physical systems. The concept of co-energy
Coenergy
Sensor that takes some predefined action when it senses the appropriate input
functions in one unit. Each element contributes to transforming a physical quantity into reliable digital information suitable for higher-level processing
Intelligent_sensor
Absorbed dose of ionizing radiation weighted with the quality factor
radiation-induced cancer and genetic damage. It is derived from the physical quantity absorbed dose, but also takes into account the biological effectiveness
Equivalent_dose
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PHYSICAL QUANTITY
PHYSICAL QUANTITY
Girl/Female
Biblical
Relaxation, physic, comfort.
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Sindhi, Telugu
An Ancient Physician
Boy/Male
Biblical American Hebrew
Physician; cure.
Boy/Male
Arabic
Physician
Boy/Male
Biblical
The physic or medicine of God.
Biblical
Raphu, relaxation; physic; comfort
Boy/Male
Muslim
An ancient physician
Boy/Male
Hindu, Indian, Malayalam
Outer; Body; Physical; Ambition; Power; Progress; Career; Success
Boy/Male
Arabic
Wise; Healer; Physician; Ruler; Sovereign
Boy/Male
Tamil
Physical bonding
Biblical
physician; cure
Boy/Male
Arthurian Legend
A physician.
Boy/Male
Arabic, Muslim
An Ancient Physician
Boy/Male
Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Physical Bonding
Girl/Female
Biblical
Relaxation, physic, comfort.
Girl/Female
Arabic, Muslim
Sage; Philosopher; Physician; Doctor
Boy/Male
Gujarati, Hindu, Indian, Jain, Telugu
Natural; Physical; Radiant; Pearl; Another Name for Shiva
Boy/Male
Indian, Sanskrit
Medicine; Healer; Physician
Surname or Lastname
English
English : from a nickname for a physician.
Boy/Male
Tamil
An ancient physician
PHYSICAL QUANTITY
PHYSICAL QUANTITY
PHYSICAL QUANTITY
PHYSICAL QUANTITY
PHYSICAL QUANTITY
PHYSICAL QUANTITY
PHYSICAL QUANTITY
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