In solid-state physics, the electron mobility characterizes how quickly an electron can move through a metal or semiconductor, when pulled by an electric field.
Solubility
Solubility is the property of a solid, liquid, or gaseous chemical substance called solute to dissolve in a solid, liquid, or gaseous solvent.
Admittance
In electrical engineering, admittance is a measure of how easily a circuit or device will allow a current to flow.
Film speed
Film speed is the measure of a photographic film's sensitivity to light, determined by sensitometry and measured on , the most recent being the system.
Speed of sound
The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium.
Electric power
Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit.
Electric field
An electric field is a vector field that associates to each point in space the Coulomb force that would be experienced per unit of electric charge, by an infinitesimal test charge at that point.
Viscosity
The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress.
Humidity
Humidity is the amount of water vapor in the air.
Scalar (physics)
A scalar in physics is a physical quantity that can be described by a single element of a number field such as a real number, often accompanied by units of measurement.
Invariant (physics)
In mathematics and theoretical physics, an invariant is a property of a system which remains unchanged under some transformation.
Electrical impedance
Electrical impedance is the measure of the opposition that a circuit presents to a current when a voltage is applied.
Suction
Suction is the flow of a fluid into a partial vacuum, or region of low pressure.
Redshift
In physics, redshift happens when light or other electromagnetic radiation from an object is increased in wavelength, or shifted to the red end of the spectrum.
Colorimetry
Colorimetry (American English) or Colourimetry (British English; see spelling differences) is "the science and technology used to quantify and describe physically the human color perception.
System of measurement
A system of measurement is a collection of units of measurement and rules relating them to each other.
Quantum efficiency
The term quantum efficiency (QE) may apply to incident photon to converted electron (IPCE) ratio, of a photosensitive device or it may refer to the TMR effect of a Magnetic Tunnel Junction.
Displacement (fluid)
In fluid mechanics, displacement occurs when an object is immersed in a fluid, pushing it out of the way and taking its place.
Radiant flux
In radiometry, radiant flux or radiant power is the radiant energy emitted, reflected, transmitted or received, per unit time, and spectral flux or spectral power is the radiant flux per unit frequency or wavelength, depending on whether the spectrum is taken as a function of frequency or of wavelength.
Rotational speed
Rotational speed (or speed of revolution) of an object rotating around an axis is the number of turns of the object divided by time, specified as revolutions per minute (rpm), revolutions per second (rev/s), or radians per second (rad/s).
Electrical resistance and conductance
The electrical resistance of an electrical conductor is a measure of the difficulty to pass an electric current through that conductor.
Voltage
Voltage, electric potential difference, electric pressure or electric tension (formally denoted ∆V or ∆U, but more often simply as V or U, for instance in the context of Ohm's or Kirchhoff's laws) is the difference in electric potential energy between two points per unit electric charge.
List of electromagnetism equations
This article summarizes equations in the theory of electromagnetism.
List of equations in gravitation
This article summarizes equations in the theory of gravitation.
Intensive and extensive properties
Physical properties of materials and systems can often be categorized as being either intensive or extensive quantities, according to how the property changes when the size (or extent) of the system changes.
Atomic mass
The atomic mass (ma) is the mass of an atomic particle, sub-atomic particle, or molecule.
Buckling
In science, buckling is a mathematical instability, leading to a failure mode.
Torque
Torque, moment, or moment of force (see the below) is the tendency of a force to rotate an object about an axis, fulcrum, or pivot.
Jerk (physics)
In physics, jerk, also known as jolt, surge, or lurch, is the rate of change of acceleration; that is, the derivative of acceleration with respect to time, and as such the second derivative of velocity, or the third derivative of position.
Luminous intensity
In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye.
Electrical resistivity and conductivity
Electrical resistivity (also known as resistivity, specific electrical resistance, or volume resistivity) is an intrinsic property that quantifies how strongly a given material opposes the flow of electric current.
Specific gravity
Specific gravity is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.
Relative density
Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material.
Enthalpy
Enthalpy /ˈɛnθəlpi/ (Symbol: H) is a measurement of energy in a thermodynamic system.
Angular momentum
In physics, angular momentum (rarely, moment of momentum or rotational momentum) is the rotational analog of linear momentum.
Angular velocity
In physics, the angular velocity is defined as the rate of change of angular displacement and is a vector quantity (more precisely, a pseudovector) which specifies the angular speed (rotational speed) of an object and the axis about which the object is rotating.
Electromotive force
Electromotive force, also called emf (denoted and measured in volts), is the voltage developed by any source of electrical energy such as a battery or dynamo.
Volume (thermodynamics)
In thermodynamics, the volume of a system is an important extensive parameter for describing its thermodynamic state.
Thermal conduction
Thermal conduction is the transfer of heat (internal energy) by microscopic collisions of particles and movement of electrons within a body.
Moment (physics)
In physics, a moment is an expression involving the product of a distance and a physical quantity, and in this way it accounts for how the physical quantity is located or arranged.
Spin (physics)
In quantum mechanics and particle physics, spin is an intrinsic form of angular momentum carried by elementary particles, composite particles (hadrons), and atomic nuclei.
Refractive index
In optics, the refractive index or index of refraction n of a material is a dimensionless number that describes how light propagates through that medium.
Inductance
In electromagnetism and electronics, inductance is the property of an electrical conductor by which a change in current through it induces an electromotive force in both the conductor itself and in any nearby conductors by mutual inductance.
Heat capacity
Heat capacity or thermal capacity is a measurable physical quantity equal to the ratio of the heat added to (or removed from) an object to the resulting temperature change.
Stress (mechanics)
In continuum mechanics, stress is a physical quantity that expresses the internal forces that neighboring particles of a continuous material exert on each other, while strain is the measure of the deformation of the material.
Solid angle
In geometry, a solid angle (symbol: Ω) is the two-dimensional angle in three-dimensional space that an object subtends at a point.
Scale of temperature
Scale of temperature is a way to measure temperature quantitatively.
Sound pressure
Sound pressure or acoustic pressure is the local pressure deviation from the ambient (average, or equilibrium) atmospheric pressure, caused by a sound wave.
Magnetic field
A magnetic field is the magnetic effect of electric currents and magnetic materials.
Frequency
Frequency is the number of occurrences of a repeating event per unit time.
Audio frequency
An audio frequency (abbreviation: AF) or audible frequency is characterized as a periodic vibration whose frequency is audible to the average human.
Group velocity
The group velocity of a wave is the velocity with which the overall shape of the waves' amplitudes—known as the modulation or envelope of the wave—propagates through space.
Momentum
(This article is about momentum in physics. For other uses, see Momentum (disambiguation).) In classical mechanics, linear momentum, translational momentum, or simply momentum (pl. momenta; SI unit kg · m/s) is the product of the mass and velocity of an object, quantified in kilogram-meters per second.
Cusec
Cusec is a measure of flow rate and is informal shorthand for "cubic feet per second" (28.317 litres per second).
Electric potential
An electric potential (also called the electric field potential or the electrostatic potential) is the amount of electric potential energy that a unitary point electric charge would have if located at any point in space, and is equal to the work done by an external agent in carrying a unit of positive charge from the arbitrarily chosen reference point (usually infinity) to that point without any acceleration.
Quality (physics)
In response theory, the quality of an excited system is related to the number of excitation frequencies to which it can respond.
Magnetic moment
The magnetic moment of a magnet is a quantity that determines the torque it will experience in an external magnetic field.
Luminance
Luminance is a photometric measure of the luminous intensity per unit area of light travelling in a given direction.
Sound energy density
Sound energy density or sound density is the sound energy per unit volume.
Temperature coefficient
A temperature coefficient describes the relative change of a physical property that is associated with a given change in temperature.
Circular dichroism
Circular dichroism (CD) is dichroism involving circularly polarized light, i.
Neutron magnetic moment
The neutron magnetic moment is the intrinsic magnetic dipole moment of the neutron, symbol μn.
Heat capacity ratio
In thermal physics and thermodynamics, the heat capacity ratio or adiabatic index or ratio of specific heats or Poisson constant, is the ratio of the heat capacity at constant pressure (CP) to heat capacity at constant volume (CV).
Fuel efficiency
Fuel efficiency is a form of thermal efficiency, meaning the efficiency of a process that converts chemical potential energy contained in a carrier fuel into kinetic energy or work.
Lorentz factor
The Lorentz factor or Lorentz term is the factor by which time, length, and relativistic mass change for an object while that object is moving.
Specific weight
The specific weight (also known as the unit weight) is the weight per unit volume of a material.
In solid-state physics, the electron mobility characterizes how quickly an electron can move through a metal or semiconductor, when pulled by an electric field.
Solubility
Solubility is the property of a solid, liquid, or gaseous chemical substance called solute to dissolve in a solid, liquid, or gaseous solvent.
Admittance
In electrical engineering, admittance is a measure of how easily a circuit or device will allow a current to flow.
Film speed
Film speed is the measure of a photographic film's sensitivity to light, determined by sensitometry and measured on , the most recent being the system.
Speed of sound
The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium.
Electric power
Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit.
Electric field
An electric field is a vector field that associates to each point in space the Coulomb force that would be experienced per unit of electric charge, by an infinitesimal test charge at that point.
Viscosity
The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress.
Humidity
Humidity is the amount of water vapor in the air.
Scalar (physics)
A scalar in physics is a physical quantity that can be described by a single element of a number field such as a real number, often accompanied by units of measurement.
Invariant (physics)
In mathematics and theoretical physics, an invariant is a property of a system which remains unchanged under some transformation.
Electrical impedance
Electrical impedance is the measure of the opposition that a circuit presents to a current when a voltage is applied.
Suction
Suction is the flow of a fluid into a partial vacuum, or region of low pressure.
Redshift
In physics, redshift happens when light or other electromagnetic radiation from an object is increased in wavelength, or shifted to the red end of the spectrum.
Colorimetry
Colorimetry (American English) or Colourimetry (British English; see spelling differences) is "the science and technology used to quantify and describe physically the human color perception.
System of measurement
A system of measurement is a collection of units of measurement and rules relating them to each other.
Quantum efficiency
The term quantum efficiency (QE) may apply to incident photon to converted electron (IPCE) ratio, of a photosensitive device or it may refer to the TMR effect of a Magnetic Tunnel Junction.
Displacement (fluid)
In fluid mechanics, displacement occurs when an object is immersed in a fluid, pushing it out of the way and taking its place.
Radiant flux
In radiometry, radiant flux or radiant power is the radiant energy emitted, reflected, transmitted or received, per unit time, and spectral flux or spectral power is the radiant flux per unit frequency or wavelength, depending on whether the spectrum is taken as a function of frequency or of wavelength.
Rotational speed
Rotational speed (or speed of revolution) of an object rotating around an axis is the number of turns of the object divided by time, specified as revolutions per minute (rpm), revolutions per second (rev/s), or radians per second (rad/s).
Electrical resistance and conductance
The electrical resistance of an electrical conductor is a measure of the difficulty to pass an electric current through that conductor.
Voltage
Voltage, electric potential difference, electric pressure or electric tension (formally denoted ∆V or ∆U, but more often simply as V or U, for instance in the context of Ohm's or Kirchhoff's laws) is the difference in electric potential energy between two points per unit electric charge.
List of electromagnetism equations
This article summarizes equations in the theory of electromagnetism.
List of equations in gravitation
This article summarizes equations in the theory of gravitation.
Intensive and extensive properties
Physical properties of materials and systems can often be categorized as being either intensive or extensive quantities, according to how the property changes when the size (or extent) of the system changes.
Atomic mass
The atomic mass (ma) is the mass of an atomic particle, sub-atomic particle, or molecule.
Buckling
In science, buckling is a mathematical instability, leading to a failure mode.
Torque
Torque, moment, or moment of force (see the below) is the tendency of a force to rotate an object about an axis, fulcrum, or pivot.
Jerk (physics)
In physics, jerk, also known as jolt, surge, or lurch, is the rate of change of acceleration; that is, the derivative of acceleration with respect to time, and as such the second derivative of velocity, or the third derivative of position.
Luminous intensity
In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye.
Electrical resistivity and conductivity
Electrical resistivity (also known as resistivity, specific electrical resistance, or volume resistivity) is an intrinsic property that quantifies how strongly a given material opposes the flow of electric current.
Specific gravity
Specific gravity is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.
Relative density
Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material.
Enthalpy
Enthalpy /ˈɛnθəlpi/ (Symbol: H) is a measurement of energy in a thermodynamic system.
Angular momentum
In physics, angular momentum (rarely, moment of momentum or rotational momentum) is the rotational analog of linear momentum.
Angular velocity
In physics, the angular velocity is defined as the rate of change of angular displacement and is a vector quantity (more precisely, a pseudovector) which specifies the angular speed (rotational speed) of an object and the axis about which the object is rotating.
Electromotive force
Electromotive force, also called emf (denoted and measured in volts), is the voltage developed by any source of electrical energy such as a battery or dynamo.
Volume (thermodynamics)
In thermodynamics, the volume of a system is an important extensive parameter for describing its thermodynamic state.
Thermal conduction
Thermal conduction is the transfer of heat (internal energy) by microscopic collisions of particles and movement of electrons within a body.
Moment (physics)
In physics, a moment is an expression involving the product of a distance and a physical quantity, and in this way it accounts for how the physical quantity is located or arranged.
Spin (physics)
In quantum mechanics and particle physics, spin is an intrinsic form of angular momentum carried by elementary particles, composite particles (hadrons), and atomic nuclei.
Refractive index
In optics, the refractive index or index of refraction n of a material is a dimensionless number that describes how light propagates through that medium.
Inductance
In electromagnetism and electronics, inductance is the property of an electrical conductor by which a change in current through it induces an electromotive force in both the conductor itself and in any nearby conductors by mutual inductance.
Heat capacity
Heat capacity or thermal capacity is a measurable physical quantity equal to the ratio of the heat added to (or removed from) an object to the resulting temperature change.
Stress (mechanics)
In continuum mechanics, stress is a physical quantity that expresses the internal forces that neighboring particles of a continuous material exert on each other, while strain is the measure of the deformation of the material.
Solid angle
In geometry, a solid angle (symbol: Ω) is the two-dimensional angle in three-dimensional space that an object subtends at a point.
Scale of temperature
Scale of temperature is a way to measure temperature quantitatively.
Sound pressure
Sound pressure or acoustic pressure is the local pressure deviation from the ambient (average, or equilibrium) atmospheric pressure, caused by a sound wave.
Magnetic field
A magnetic field is the magnetic effect of electric currents and magnetic materials.
Frequency
Frequency is the number of occurrences of a repeating event per unit time.
Audio frequency
An audio frequency (abbreviation: AF) or audible frequency is characterized as a periodic vibration whose frequency is audible to the average human.
Group velocity
The group velocity of a wave is the velocity with which the overall shape of the waves' amplitudes—known as the modulation or envelope of the wave—propagates through space.
Momentum
(This article is about momentum in physics. For other uses, see Momentum (disambiguation).) In classical mechanics, linear momentum, translational momentum, or simply momentum (pl. momenta; SI unit kg · m/s) is the product of the mass and velocity of an object, quantified in kilogram-meters per second.
Cusec
Cusec is a measure of flow rate and is informal shorthand for "cubic feet per second" (28.317 litres per second).
Electric potential
An electric potential (also called the electric field potential or the electrostatic potential) is the amount of electric potential energy that a unitary point electric charge would have if located at any point in space, and is equal to the work done by an external agent in carrying a unit of positive charge from the arbitrarily chosen reference point (usually infinity) to that point without any acceleration.
Quality (physics)
In response theory, the quality of an excited system is related to the number of excitation frequencies to which it can respond.
Magnetic moment
The magnetic moment of a magnet is a quantity that determines the torque it will experience in an external magnetic field.
Luminance
Luminance is a photometric measure of the luminous intensity per unit area of light travelling in a given direction.
Sound energy density
Sound energy density or sound density is the sound energy per unit volume.
Temperature coefficient
A temperature coefficient describes the relative change of a physical property that is associated with a given change in temperature.
Circular dichroism
Circular dichroism (CD) is dichroism involving circularly polarized light, i.
Neutron magnetic moment
The neutron magnetic moment is the intrinsic magnetic dipole moment of the neutron, symbol μn.
Heat capacity ratio
In thermal physics and thermodynamics, the heat capacity ratio or adiabatic index or ratio of specific heats or Poisson constant, is the ratio of the heat capacity at constant pressure (CP) to heat capacity at constant volume (CV).
Fuel efficiency
Fuel efficiency is a form of thermal efficiency, meaning the efficiency of a process that converts chemical potential energy contained in a carrier fuel into kinetic energy or work.
Lorentz factor
The Lorentz factor or Lorentz term is the factor by which time, length, and relativistic mass change for an object while that object is moving.
Specific weight
The specific weight (also known as the unit weight) is the weight per unit volume of a material.
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