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The uppercase letter Η is used as a symbol in textual criticism for the Alexandrian text-type (from Hesychius, its once-supposed editor). In chemistry , the letter H as symbol of enthalpy sometimes is said to be a Greek eta, but since enthalpy comes from ἐνθάλπος, which begins in a smooth breathing and epsilon, it is more likely a ...
Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities. In these contexts, the capital letters and the small letters represent distinct and unrelated entities.
Symbol Name Meaning SI unit of measure alpha: alpha particle: angular acceleration: radian per second squared (rad/s 2) fine-structure constant: unitless beta: velocity in terms of the speed of light c: unitless beta particle: gamma: Lorentz factor: unitless photon: gamma ray: shear strain: radian
The eta (η) and eta prime meson (η′) are isosinglet mesons made of a mixture of up, down and strange quarks and their antiquarks. The charmed eta meson (η c) and bottom eta meson (η b) are similar forms of quarkonium; they have the same spin and parity as the (light) η defined, but are made of charm quarks and bottom quarks respectively.
Eta (Η or η) is the seventh letter of the Greek alphabet. ... The small letter eta is used as 't Hooft symbol; Science and technology. Eicosatetraenoic acid;
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During the classical era, more dialects adopted the new Ionian vocalic Eta (as Athens did around c. 400 BC). As many of these dialects nevertheless still also pronounced /h/ , they faced the problem of distinguishing between their own old consonantal symbol and the new vocalic symbol.
Cotton later proposed the term hapticity derived from the adjectival prefix hapto (from the Greek haptein, to fasten, denoting contact or combination) placed before the name of the olefin, [7] where the Greek letter η (eta) is used to denote the number of contiguous atoms of a ligand that bind to a metal center.