list of physical quantities wikipedia

Physical property

A physical property is any property of a physical system that is measurable. The changes in the physical properties of a system can be used to describe its changes between momentary states. A quantifiable physical property is called physical quantity. Measurable physical quantities are often referred to as observables.Some physical properties are …

List of thermodynamic properties

List of thermodynamic properties. In thermodynamics, a physical property is any property that is measurable, and whose value describes a state of a physical system. Thermodynamic properties are defined as characteristic features of a system, capable of specifying the system''s state. Some constants, such as the ideal gas constant, R, do not ...

Centimetre–gram–second system of units

The centimetre–gram–second system of units (CGS or cgs) is a variant of the metric system based on the centimetre as the unit of length, the gram as the unit of mass, and the second as the unit of time.All CGS mechanical units are unambiguously derived from these three base units, but there are several different ways in which the CGS system was extended to …

Physical quantity

OverviewComponentsSymbols and nomenclatureSupportDimensions, units, and kind Base and derived quantitiesSee alsoFurther reading

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 as a value, which is the algebraic multiplication of a numerical value and a unit of measurement. For example, the physical quantity mass, symbol m, can be quantified as m=n kg, where n is the numerical value and kg is the unit symbo…

Special relativity

t. e. In physics, the special theory of relativity, or special relativity for short, is a scientific theory of the relationship between space and time. In Albert Einstein ''s 1905 treatment, the theory is presented as being based on just two postulates: [p 1] [1] [2] The laws of physics are invariant (identical) in all inertial frames of ...

Physical (TV series)

Physical is an American comedy-drama television series created by Annie Weisman. The series premiered on Apple TV+ on June 18, 2021. In August 2021, the series was renewed for a second season ahead of its first season finale, which premiered on June 3, 2022. [1] [2] In August 2022, the series was renewed for a third season. [3]

Volume

Volume is a measure of regions in three-dimensional space. It is often quantified numerically using SI derived units (such as the cubic metre and litre) or by various imperial or US customary units (such as the gallon, …

List of measuring instruments

A measuring instrument is a device to measure a physical quantity. In the physical sciences, quality assurance, and engineering, measurement is the activity of obtaining …

List of optics equations

Visulization of flux through differential area and solid angle. As always ^ is the unit normal to the incident surface A, = ^, and ^ is a unit vector in the direction of incident flux on the area element, θ is the angle between them. The factor ^ ^ = ^ = ⁡ arises when the flux is not normal to the surface element, so the area normal to the flux is reduced.

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Laws of thermodynamics

The laws of thermodynamics are a set of scientific laws which define a group of physical quantities, such as temperature, energy, and entropy, that characterize thermodynamic systems in thermodynamic equilibrium. The laws also use various parameters for thermodynamic processes, such as thermodynamic work and heat, and establish …

List of dimensionless quantities

12 · This is a list of well-known dimensionless quantities illustrating their variety of …

Conjugate variables

Conjugate variables are pairs of variables mathematically defined in such a way that they become Fourier transform duals, or more generally are related through Pontryagin duality.The duality relations lead naturally to an uncertainty relation—in physics called the Heisenberg uncertainty principle—between them. In mathematical terms, conjugate …

List of conversion factors

This article gives a list of conversion factors for several physical quantities.A number of different units (some only of historical interest) are shown and expressed in terms of the corresponding SI unit nversions between units in the metric system are defined by their prefixes (for example, 1 kilogram = 1000 grams, 1 milligram = 0.001 grams) and are thus …

Quantities, Units and Symbols in Physical Chemistry

Front cover of the Green Book. Quantities, Units and Symbols in Physical Chemistry, also known as the Green Book, is a compilation of terms and symbols widely used in the field of physical chemistry also includes a table of physical constants, tables listing the properties of elementary particles, chemical elements, and nuclides, and information …

List of particles

Leptons. Leptons do not interact via the strong interaction.Their respective antiparticles are the antileptons, which are identical, except that they carry the opposite electric charge and lepton number.The antiparticle of an electron is an antielectron, which is almost always called a "positron" for historical reasons.There are six leptons in total; the three charged …

Coherence (units of measurement)

James Clerk Maxwell played a major role in developing the concept of a coherent CGS system and in extending the metric system to include electrical units.. A coherent system of units is a system of units of measurement used to express physical quantities that are defined in such a way that the equations relating the numerical values expressed in the …

List of moments of inertia

List of moments of inertia. Moment of inertia, denoted by I, measures the extent to which an object resists rotational acceleration about a particular axis, it is the rotational analogue to mass (which determines an object''s resistance to linear acceleration ). The moments of inertia of a mass have units of dimension ML 2 ( [mass] × [length] 2 ).

Force

In physics, a force is an influence that can cause an object to change its velocity, i.e., to accelerate, meaning a change in speed or direction, unless counterbalanced by other forces.The concept of force makes the everyday notion of pushing or pulling mathematically precise. Because the magnitude and direction of a force are both important, force is a …

International System of Quantities

ISO/IEC 80000 defines physical quantities that are measured with the SI units and also includes many other quantities in modern science and technology. The name …

List of countries and dependencies by area

Dymaxion map of the world with the 30 largest countries and territories by area. This is a list of the world''s countries and their dependencies by land, water, and total area, ranked by total area.. The entries in this list …

List of physical constants

The 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 nature and thus are independent of the unit system in which they are measured.Many of these are redundant, in the sense that they obey a known relationship with other physical constants and can be …

List of equations in classical mechanics

Classical mechanics is the branch of physics used to describe the motion of macroscopic objects. It is the most familiar of the theories of physics. The concepts it covers, such as mass, acceleration, and force, are commonly used and known. The subject is based upon a three-dimensional Euclidean space with fixed axes, called a frame of reference. The point …

List of common physics notations

This is a list of common physical constants and variables, and their notations. Note that bold text indicates that the quantity is a vector. Latin characters. Symbol Meaning SI unit of measure magnetic vector potential: tesla meter (T⋅m) area: square meter (m 2) amplitude: meter: atomic mass number: unitless ...

Physical properties of soil

The physical properties of soil, in order of decreasing importance for ecosystem services such as crop production, are texture, structure, bulk density, porosity, consistency, temperature, colour and resistivity. [1] Soil texture is determined by the relative proportion of the three kinds of soil mineral particles, called soil separates: sand ...

Energy

In physics, energy (from Ancient Greek ἐνέργεια (enérgeia) ''activity'') is the quantitative property that is transferred to a 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 of energy states that energy can be converted in form, but not …

Mathematical formulation of quantum mechanics

Separability is a mathematically convenient hypothesis, with the physical interpretation that the state is uniquely determined by countably many observations. Quantum states can be identified with equivalence classes in H, where two vectors (of length 1) represent the same state if they differ only by a phase factor. As such, quantum states form a ray in projective …

Dimensional analysis

Dimensional analysis. In engineering and science, dimensional analysis is the analysis of the relationships between different physical quantities by identifying their base quantities (such as length, mass, time, and electric current) and units of measurement (such as meters and grams) and tracking these dimensions as calculations or comparisons ...

Dimensionless quantity

Dimensionless quantities, also known as quantities of dimension one [1] are implicitly defined in a manner that prevents their aggregation into units of measurement. [2] [3] Typically expressed as ratios that align with another system, these quantities do not necessitate explicitly defined units. For instance, alcohol by volume (ABV) represents ...

List of materials properties

A material property is an intensive property of a material, i.e., a physical property or chemical property that does not depend on the amount of the material. These quantitative properties may be used as a metric by which the benefits of one material versus another can be compared, thereby aiding in materials selection.. A property having a fixed value for a …

List of equations in nuclear and particle physics

Quantity (common name/s) (Common) symbol/s Defining equation SI units Dimension Number of atoms N = Number of atoms remaining at time t. N 0 = Initial number of atoms at time t = 0 N D = Number of atoms decayed at time t = + dimensionless dimensionless Decay rate, activity of a radioisotope: A = Bq = Hz = s −1 [T] −1 Decay constant

List of relativistic equations

Lorentz factor. where and v is the relative velocity between two inertial frames . For two frames at rest, γ = 1, and increases with relative velocity between the two inertial frames. As the relative velocity approaches the speed of light, γ → ∞. Time dilation (different times t and t'' at the same position x in same inertial frame)

List of electromagnetism equations

Electric quantities Continuous charge distribution. The volume charge density ρ is the amount of charge per unit volume (cube), surface charge density σ is amount per unit surface area (circle) with outward unit normal n̂, d is the dipole moment between two point charges, the volume density of these is the polarization density P. Position vector r is a …

International System of Units

The SI comprises a coherent system of units of measurement starting with seven base units, which are the second (symbol s, the unit of time ), metre (m, length ), kilogram (kg, mass …

Table of thermodynamic equations

Common thermodynamic equations and quantities in thermodynamics, using mathematical notation, are as follows: Definitions [ edit ] Main articles: List of thermodynamic properties, Thermodynamic potential, Free entropy, and Defining equation (physical chemistry)

Category:Physical quantities

This category identifies physical quantities which are necessary defined quantities, measured, manipulated, generally used by physicists, engineers, chemists, etc.

list of physical quantities

Physical quantities and units; Statements. instance of. Wikimedia list article. 0 references. is a list of. physical quantity. 0 references. category related to list. Category:Physical quantities. 0 references . Sitelinks. Wikipedia (17 entries) edit. arwiki قائمة الكميات ...

Physical quantity

In physics, a physical quantity is any physical property that can be quantified, that is, be measured using numbers. Examples of physical quantities are mass, amount of …