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  2. Wastegate - Wikipedia

    en.wikipedia.org/wiki/Wastegate

    One advantage of installing a remote mount wastegate to a free-float (or non-wastegate) turbo includes an allowance for a smaller area over radius (A/R) turbine housing, resulting in less lag time before the turbo begins to spool and create boost. [2] One of the earliest usage of a modern wastegate was in the Saab 99 Turbo 1978, presented in ...

  3. On shell and off shell - Wikipedia

    en.wikipedia.org/wiki/On_shell_and_off_shell

    An example comes from considering a scalar field in D-dimensional Minkowski space.Consider a Lagrangian density given by (,).The action is = (,). The Euler–Lagrange equation for this action can be found by varying the field and its derivative and setting the variation to zero, and is:

  4. Free electron model - Wikipedia

    en.wikipedia.org/wiki/Free_electron_model

    In solid-state physics, the free electron model is a quantum mechanical model for the behaviour of charge carriers in a metallic solid. It was developed in 1927, [1] principally by Arnold Sommerfeld, who combined the classical Drude model with quantum mechanical Fermi–Dirac statistics and hence it is also known as the Drude–Sommerfeld model.

  5. Titanium aluminide - Wikipedia

    en.wikipedia.org/wiki/Titanium_aluminide

    Titanium aluminide (chemical formula TiAl), commonly gamma titanium, is an intermetallic chemical compound. It is lightweight and resistant to oxidation [1] and heat, but has low ductility. The density of γ-TiAl is about 4.0 g/cm 3. It finds use in several applications including aircraft, jet engines, sporting equipment and automobiles.

  6. Free body diagram - Wikipedia

    en.wikipedia.org/wiki/Free_body_diagram

    In physics and engineering, a free body diagram (FBD; also called a force diagram) [1] is a graphical illustration used to visualize the applied forces, moments, and resulting reactions on a free body in a given condition. It depicts a body or connected bodies with all the applied forces and moments, and reactions, which act on the body(ies).

  7. Mathematical formulation of the Standard Model - Wikipedia

    en.wikipedia.org/wiki/Mathematical_formulation...

    Standard Model of Particle Physics. The diagram shows the elementary particles of the Standard Model (the Higgs boson, the three generations of quarks and leptons, and the gauge bosons), including their names, masses, spins, charges, chiralities, and interactions with the strong, weak and electromagnetic forces.

  8. Charged current - Wikipedia

    en.wikipedia.org/wiki/Charged_current

    The simplest Feynman diagram for beta decay. It contains a charged current interaction at each vertex. Charged current interactions are the most easily detected class of weak interactions. The weak force is best known for mediating nuclear decay. It has very short range, but is the only force (apart from gravity) to interact with neutrinos.

  9. Contact geometry - Wikipedia

    en.wikipedia.org/wiki/Contact_geometry

    A consequence of the definition is that the restriction of the 2-form ω = dα to a hyperplane in ξ is a nondegenerate 2-form. This construction provides any contact manifold M with a natural symplectic bundle of rank one smaller than the dimension of M. Note that a symplectic vector space is always even-dimensional, while contact manifolds ...