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  2. Jewish diaspora - Wikipedia

    en.wikipedia.org/wiki/Jewish_diaspora

    The Jewish diaspora (Hebrew: גוֹלָה, romanized: gōlā), dispersion (Hebrew: תְּפוּצָה, romanized: təfūṣā) or exile (Hebrew: גָּלוּת gālūṯ; Yiddish: golus) [a] is the dispersion of Israelites or Jews out of their ancient ancestral homeland (the Land of Israel) and their subsequent settlement in other parts of the ...

  3. Dispersion (optics) - Wikipedia

    en.wikipedia.org/wiki/Dispersion_(optics)

    Dispersion is the phenomenon in which the phase velocity of a wave depends on its frequency. [1] Sometimes the term chromatic dispersion is used to refer to optics specifically, as opposed to wave propagation in general. A medium having this common property may be termed a dispersive medium.

  4. Dispersion - Wikipedia

    en.wikipedia.org/wiki/Dispersion

    Dispersion (chemistry), a system in which particles are dispersed in a continuous phase of a different composition; Dispersion (geology), a process whereby sodic soil disperses when exposed to water; Dispersion (materials science), the fraction of atoms of a material exposed to the surface; Dispersion polymerization, a polymerization process

  5. Casting - Wikipedia

    en.wikipedia.org/wiki/Casting

    Casting is most often used for making complex shapes that would be otherwise difficult or uneconomical to make by other methods. Heavy equipment like machine tool beds, ships' propellers, etc. can be cast easily in the required size, rather than fabricating by joining several small pieces. [1] Casting is a 7,000-year-old process.

  6. Dispersion (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Dispersion_(chemistry)

    Dispersion is a process by which (in the case of solid dispersing in a liquid) agglomerated particles are separated from each other, and a new interface between the inner surface of the liquid dispersion medium and the surface of the dispersed particles is generated. This process is facilitated by molecular diffusion and convection. [4]

  7. Dispersity - Wikipedia

    en.wikipedia.org/wiki/Dispersity

    A uniform polymer (often referred to as a monodisperse polymer) is composed of molecules of the same mass. [5] Nearly all natural polymers are uniform. [6] Synthetic near-uniform polymer chains can be made by processes such as anionic polymerization, a method using an anionic catalyst to produce chains that are similar in length.

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Dispersion relation - Wikipedia

    en.wikipedia.org/wiki/Dispersion_relation

    A dispersion relation relates the wavelength or wavenumber of a wave to its frequency. Given the dispersion relation, one can calculate the frequency-dependent phase velocity and group velocity of each sinusoidal component of a wave in the medium, as a function of frequency