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F,

sixth letter of the alphabetalphabet
[Gr. alpha-beta, like Eng. ABC], system of writing, theoretically having a one-for-one relation between character (or letter) and phoneme (see phonetics). Few alphabets have achieved the ideal exactness.
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. The Greek letter corresponding to it, digamma, which probably represented a sound like w, disappeared before the classical period. In Western alphabets f has usually represented the voiceless labiodental fricative, as in the English fast. In musical notationmusical notation,
symbols used to make a written record of musical sounds.

Two different systems of letters were used to write down the instrumental and the vocal music of ancient Greece. In his five textbooks on music theory Boethius (c.A.D. 470–A.D.
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 F stands for a note in the scale. In chemistry F is the symbol of the element fluorinefluorine
, gaseous chemical element; symbol F; at. no. 9; at. wt. 18.9984; m.p. −219.6°C;; b.p. −188.14°C;; density 1.696 grams per liter at STP; valence −1. Fluorine is a yellowish, poisonous, highly corrosive gas.
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.

f

(physics)
Notation representing the Coriolis parameter.

F

(electricity)
(chemistry)

class A, B, C, D, E, F

A classification applied to fire doors, fire windows, roof coverings, interior finishes, places of assembly, etc., to indicate gradations of fire safety. See fire-endurance, fire-door rating.

F

Abbr. for “Fahrenheit.”
References in periodicals archive ?
He added : "The F's announcement reflects the agency's emphasis on a methodical, safety-focused approach to UAS introduction, which is consistent with the agency's decades-long history of safely integrating new airports, aircraft, systems and procedures into the aviation system.
Limited deferral was retained after Subpart F's enactment to protect the competitiveness of CFCs doing business overseas.
The major pitfall in this type of transaction is that the basis of the FLP's underlying assets remains at F's original cost basis.
If, prior to F's retirement, he was receiving an annual salary of around $100,000, the same dollars would be available for S to make the annuity payments.
Scenario 5: X is owned 79% by F and 21% by F's brother.
A redeems F's 80% interest before X and Y's credit shelter trust is funded.
For his whole life, F's unnamed lover has had a volcano growing inside him, fueled by experiences such as interactions with an abusive father and repressed queerness.
'Federal Home Minister brigadier retd Eja Shah has announced to arrest JUI F's leadership and workers but we want to clarify that JUI F wouldn't deter millions of JUI F's Jiyalas from entering Islamabad.'
According to information made available here by Pakistan Volleyball Federation (PVF), Pakistan, who topped their group E on points table edged passed group F's topped ranked team Kazakhstan 3-1 with the game scores of 25-21, 25-18, 17-25 and 25-21.
F's partnership agreement provides that only ERE (the general partner) is required to make up any deficit in its capital account.
While it was not possible to say this directly led to Mr F's death, the ombudsman said the uncertainty surrounding his treatment amounts to a "significant injustice to the family".
In addition to which, the LS 180 F's cutter head design is such that workpieces with both internal and external gear teeth can be machined in the same clamping operation, as the machine is equipped with a standard twin-track cam.