Displacement

Look up displacement in Wiktionary, the free dictionary.

Displacement may refer to:

Physical sciences

Physics

• Displacement (vector), the difference between the final and initial position of a point (for instance, the center of mass of a moving object). The actual path covered to reach the final position is irrelevant. It can simply be defined as the shortest path between the final point and initial point of a body.
  • Particle displacement, a measurement of distance of the movement of a particle in a medium as it transmits a wave (represented in mathematics by the lower-case Greek letter ξ)
  • Displacement field (mechanics), an assignment of displacement vectors for all points in a body that is displaced from one state to another
  • Electric displacement field, as appears in Maxwell's equations
• Wien's displacement law, a relation concerning the spectral distribution of blackbody radiation
• Angular displacement, a change in orientation of a rigid body, the amount of rotation about a fixed axis.

Engineering

• Engine displacement, the total volume of air/fuel mixture an engine can draw in during one complete engine cycle
• Displacement (fluid), an object immersed in a fluid pushes the fluid out of the way
• Positive displacement meter, a pump or flow meter which processes a definite fluid volume per revolution
• Displacement has several meanings related to ships and boats
  • Displacement hull, where the moving hull's weight is supported by buoyancy alone and it must displace water from its path rather than planing on the water's surface
  • Displacement speed, a rule of thumb for non planing watercraft to estimate their theoretical maximum speed
  • Displacement (ship), several related measurements of a ship's weight
• Insulation displacement connector, a type of electrical connector
• Displacement mapping, a technique in 3D computer graphics

Chemistry

• Single displacement reaction, a chemical reaction concerning the exchange of ions
• Double displacement reaction, a chemical reaction concerning the exchange of ions
• Radioactive displacement law of Fajans and Soddy, elements/isotopes created during radioactive decay

Geology

• Earth Crustal Displacement, an aspect of the Pole shift hypothesis

Medicine

• Displacement (orthopedic surgery), change in alignment of the fracture fragments

Social sciences

• Displacement (linguistics), the ability of humans (and possibly some animals) to communicate ideas that are remote in time and/or space
• Forced migration, by persecution or violence
• Displacement (psychology), a sub-conscious defense mechanism
• Displacement (parapsychology), a statistical or qualitative correspondence between targets and responses.
• Development-induced displacement, the displacement of population for economic development

Sport

• Displacement (fencing), a movement that avoids or dodges an attack

See also

• Offset (disambiguation)
• Transformation (geometry)

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