ⓘ Matter ..


In classical physics and general chemistry, matter is any substance that has mass and takes up space by having volume. All everyday objects that can be touched are ultimately composed of atoms, which are made up of interacting subatomic particles, and in everyday as well as scientific usage, "matter" generally includes atoms and anything made up of them, and any particles that act as if they have both rest mass and volume. However it does not include massless particles such as photons, or other energy phenomena or waves such as light or sound. Matter exists in various states. These include ...

Colloid vibration current

Colloid vibration current is an electroacoustic phenomenon that arises when ultrasound propagates through a fluid that contains ions and either solid particles or emulsion droplets. The pressure gradient in an ultrasonic wave moves particles relative to the fluid. This motion disturbs the double layer that exists at the particle-fluid interface. The picture illustrates the mechanism of this distortion. Practically all particles in fluids carry a surface charge. This surface charge is screened with an equally charged diffuse layer; this structure is called the double layer. Ions of the diff ...


Debris is rubble, wreckage, ruins, litter and discarded garbage/refuse/trash, scattered remains of something destroyed, discarded, or as in geology, large rock fragments left by a melting glacier etc. Depending on context, debris can refer to a number of different things. The first apparent use of the French word in English is in a 1701 description of the army of Prince Rupert upon its retreat from a battle with the army of Oliver Cromwell, in England.

Double layer (surface science)

A double layer is a structure that appears on the surface of an object when it is exposed to a fluid. The object might be a solid particle, a gas bubble, a liquid droplet, or a porous body. The DL refers to two parallel layers of charge surrounding the object. The first layer, the surface charge, consists of ions adsorbed onto the object due to chemical interactions. The second layer is composed of ions attracted to the surface charge via the Coulomb force, electrically screening the first layer. This second layer is loosely associated with the object. It is made of free ions that move in ...

Dukhin number

The Dukhin number is a dimensionless quantity that characterizes the contribution of the surface conductivity to various electrokinetic and electroacoustic effects, as well as to electrical conductivity and permittivity of fluid heterogeneous systems.

Electroacoustic phenomena

Electroacoustic phenomena arise when ultrasound propagates through a fluid containing ions. The associated particle motion generates electric signals because ions have electric charge. This coupling between ultrasound and electric field is called electroacoustic phenomena. The fluid might be a simple Newtonian liquid, or complex heterogeneous dispersion, emulsion or even a porous body. There are several different electroacoustic effects depending on the nature of the fluid., Electric sonic amplitude ESA, the inverse of the CVI effect, in which an acoustic field arises when an electric fiel ...


ⓘ Matter

  • In classical physics and general chemistry, matter is any substance that has mass and takes up space by having volume. All everyday objects that can be
  • Dark matter is a form of matter thought to account for approximately 85 of the matter in the universe and about a quarter of its total energy density
  • In physics, a state of matter is one of the distinct forms in which matter can exist. Four states of matter are observable in everyday life: solid, liquid
  • physics, exotic matter is matter that somehow deviates from normal matter and has exotic properties. A broader definition of exotic matter is any kind of
  • Strange matter or strange quark matter is quark matter containing strange quarks. In nature, strange matter is hypothesized to occur in the core of
  • In physics, mirror matter also called shadow matter or Alice matter is a hypothetical counterpart to ordinary matter Modern physics deals with three
  • Condensed matter physics is the field of physics that deals with the macroscopic and microscopic physical properties of matter In particular it is concerned
  • Soft matter or soft condensed matter is a subfield of condensed matter comprising a variety of physical systems that are deformed or structurally altered
  • another separate phase. See state of matter Glass The term phase is sometimes used as a synonym for state of matter but there can be several immiscible
  • Black Lives Matter BLM is an international activist movement, originating in the African - American community, that campaigns against violence and systemic
  • The Matter of France, also known as the Carolingian cycle, is a body of literature and legendary material associated with the history of France, in particular
  • According to the medieval poet Jean Bodel, the Matter of Rome was the literary cycle made up of Greek and Roman mythology, together with episodes from
  • White matter refers to areas of the central nervous system CNS that are mainly made up of myelinated axons, also called tracts. Long thought to be passive