A Wisdom Archive on Coulombic attraction

The permittivity of a material is usually given relative to that of vacuum, as a relative permittivity, (also called dielectric constant in some cases). The actual permittivity is then calculated by multiplying the relative permittivity by : where is the electric susceptibility of the material. Vacuum permittivity (also called permittivity of free space) is the ratio D/E in vacuum. It also appears in Coulomb's law as a part of the Coulomb force constant, , which expresses the attraction betw ...

Read more here: » Permittivity: Encyclopedia II - Permittivity - Vacuum permittivity

One way to understand the structure of metals on the basis of particles is to imagine an array of positively-charged ions sitting in a negatively-charged "gas" of free electrons. Coulombic attraction holds these oppositely-charged particles together, but there are other sorts of negative charge which are also attracted to the metal ions, such as the negative ions (anions) in an electrolyte. For a given ion at the surface of a metal, there is a certain amount of energy to be gained or lost by dissolving into the electrolyte or becoming a part ...

Read more here: » Corrosion: Encyclopedia II - Corrosion - Electrochemical theory

The Coulomb barrier, named after physicist Charles-Augustin de Coulomb (1736—1806), is the energy barrier due to electrostatic interaction that two nuclei need to overcome so they can get close enough to undergo nuclear fusion. This energy barrier is given by the electrostatic potential energy: where k is the Coulomb's constant = 8.9876×109 N m2 C−2; ε0 is the permittivity of space; q1, q2 are the charges of the interacting particle ...

Read more here: » Coulomb barrier: Encyclopedia - Coulomb barrier

In physics, Coulomb's law is an inverse-square law indicating the magnitude and direction of electrical force that one stationary, electrically charged object of small dimensions (ideally, a point source) exerts on another. Coulomb's Law may be stated as follows: "The magnitude of the electrostatic force between two point charges is directly proportional to the magnitudes of each charge and inversely proportional to the square of the distance between the charges." Coulomb's law - Scalar FormIncluding:

• Coulomb's law - Scalar Form
• Coulomb's law - Electric field
• Coulomb's law - Vector Form
• Coulomb's law - Graphical representation
• Coulomb's law - Electric field
• Coulomb's law - Electrostatic approximation
• Coulomb's law - Table of derived quantities

Read more here: » Coulomb's law: Encyclopedia - Coulomb's law

A Yukawa potential (also called a screened Coulomb potential) is a potential of the form Hideki Yukawa showed in the 1930s that such a potential arises from the exchange of a massive scalar field such as the field of the pion whose mass is m. Since the field mediator is massive the corresponding force has a certain range due to its decay, which range is inversely proportional to the mass. If the mass is zero, then the Yukawa potential becomes equivalent to a C ... Including:

• Yukawa potential - Fourier transform
• Yukawa potential - Feynman amplitude

Read more here: » Yukawa potential: Encyclopedia - Yukawa potential

Electrostatics is the branch of physics that deals with the forces exerted by a static (i.e. unchanging) electric field upon charged objects. Electrostatics - Overview. In electrostatics conditions of charge need not be 'static' and unchanging. Instead 'static' implies that the dynamic portion is being ignored, and we analyze frozen snapshots of the situation. In electrostatics we study e-fields, voltage, and charge but ignore any currents and magnetism which may also be present. Because of its relat ... Including:

• Electrostatics - Overview
• Electrostatics - The electrostatic approximation
• Electrostatics - Electrostatic potential
• Electrostatics - Fundamental concepts
• Electrostatics - Coulomb's law
• Electrostatics - The Electric field
• Electrostatics - Gauss's law
• Electrostatics - Poisson's equation
• Electrostatics - Laplace's equation
• Electrostatics - Static Charge generation
• Electrostatics - Charge separation by contact
• Electrostatics - Triboelectric series
• Electrostatics - Electrostatic generators
• Electrostatics - Charge neutralisation
• Electrostatics - 'Static' electricity

Read more here: » Electrostatics: Encyclopedia - Electrostatics

BCS theory (named for its creators, Bardeen, Cooper, and Schrieffer) successfully explains conventional superconductivity, the ability of certain metals at low temperatures to conduct electricity without resistance. BCS theory views superconductivity as a macroscopic quantum mechanical effect. It proposes that electrons with opposite spin can become paired, forming Cooper pairs. Independently and at the same time, superconductivity phenomenon was explained by Nikolay Bogoliubov by me ... Including:

• BCS theory - More details

Read more here: » BCS theory: Encyclopedia - BCS theory

Alpes-Maritimes is a département in the extreme southeast corner of France. Alpes-Maritimes - History. The Romans already had a province called Alpes-Maritimes as early as 7 BC. Its capital was Cemenelum, today Cimiez, a neighborhood in the north of Nice. At its largest in 297, this province extended to Digne and Briançon, and its capital was Embrun. A département of this name existed in France from 1793 to 1815, but it had different boundaries and included Monaco and San Remo ... Including:

• Alpes-Maritimes - History
• Alpes-Maritimes - Geography
• Alpes-Maritimes - Economy
• Alpes-Maritimes - Demographics
• Alpes-Maritimes - Culture
• Alpes-Maritimes - Tourism
• Alpes-Maritimes - Miscellaneous topics

Read more here: » Alpes-Maritimes: Encyclopedia - Alpes-Maritimes

Electricity is a property of matter that results from the presence of electric charge. Together with magnetism, it constitutes the fundamental interaction known as electromagnetism. Electricity is responsible for many well-known physical phenomena such as lightning, electric fields and electric currents, and is put to use in industrial applications such as electronics and electric power. Electricity - Concepts in electricity. In casual usage, the term electricity is applied to several related concept ... Including:

• Electricity - Concepts in electricity
• Electricity - History
• Electricity - Ancient
• Electricity - Modern
• Electricity - Electric charge
• Electricity - Electric field
• Electricity - Electric potential
• Electricity - Electric current
• Electricity - Electrical energy
• Electricity - Electric power
• Electricity - SI electricity units
• Electricity - Devices
• Electricity - Engineering
• Electricity - Safety
• Electricity - Electrical phenomena in nature

Read more here: » Electricity: Encyclopedia - Electricity