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  2. Price elasticity of demand - Wikipedia

    en.wikipedia.org/wiki/Price_elasticity_of_demand

    A good's price elasticity of demand (, PED) is a measure of how sensitive the quantity demanded is to its price. When the price rises, quantity demanded falls for almost any good (law of demand), but it falls more for some than for others. The price elasticity gives the percentage change in quantity demanded when there is a one percent increase ...

  3. Inelastic scattering - Wikipedia

    en.wikipedia.org/wiki/Inelastic_scattering

    Inelastic scattering is common in molecular collisions. Any collision which leads to a chemical reaction will be inelastic, but the term inelastic scattering is reserved for those collisions which do not result in reactions. [3] There is a transfer of energy between the translational mode (kinetic energy) and rotational and vibrational modes.

  4. Pressure Equipment Directive (EU) - Wikipedia

    en.wikipedia.org/wiki/Pressure_Equipment...

    The Pressure Equipment Directive (PED) 2014/68/EU (formerly 97/23/EC) [1] of the EU sets out the standards for the design and fabrication of pressure equipment ("pressure equipment" means steam boilers, pressure vessels, piping, safety valves and other components and assemblies subject to pressure loading) generally over one liter in volume and having a maximum pressure more than 0.5 bar gauge.

  5. Electron energy loss spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Electron_energy_loss...

    Here mfp is the mean free path of electron inelastic scattering, which has been tabulated for most elemental solids and oxides. [ 14 ] The spatial resolution of this procedure is limited by the plasmon localization and is about 1 nm, [ 6 ] meaning that spatial thickness maps can be measured in scanning transmission electron microscopy with ~1 ...

  6. Elasticity (economics) - Wikipedia

    en.wikipedia.org/wiki/Elasticity_(economics)

    If supply elasticity is zero, the supply of a good supplied is "totally inelastic", and the quantity supplied is fixed. It is calculated by dividing the percentage change in quantity supplied by the percentage change in price. [15] The supply is said to be inelastic when the change in the prices leads to small changes in the quantity of supply.

  7. Glossary of chemistry terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chemistry_terms

    Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...

  8. Deep inelastic scattering - Wikipedia

    en.wikipedia.org/wiki/Deep_inelastic_scattering

    Feynman diagram representing deep inelastic scattering of a lepton (l) on a hadron (h), at leading order in perturbative expansion. The virtual photon (γ * ) knocks a quark (q) out of the hadron. In particle physics , deep inelastic scattering is the name given to a process used to probe the insides of hadrons (particularly the baryons , such ...

  9. Elasticity coefficient - Wikipedia

    en.wikipedia.org/wiki/Elasticity_coefficient

    Given the definition of the elasticity coefficient in terms of a partial derivative, it is possible, for example, to determine the elasticity of an arbitrary rate law by differentiating the rate law by the independent variable and scaling. For example, the elasticity coefficient for a mass-action rate law such as: