3 plats en tungstène

• De taille différente et croissante (3 dimensions [X / 6Ø / 74)
• Degrenne ― Guy ― of sort

Tungsten, or wolfram, is a chemical element with the symbol W and atomic number 74.

Sequence W or digamma: 2 / 8 / 18 / 32 / 12 / 2

≍ 2 (1952) / 8 (1958) / 18 (1968) / 32 (1982)

≍ 2 (1952) / X (1960) / 28 (1978) / 60 (2010) / 72 (2022) / 74 (2024)

Tungsten is a rare metal found naturally on Earth almost exclusively as compounds with other elements.

Tungsten, at atomic number Z = 74, is the heaviest element known to be biologically functional.

The name "tungsten" (which means "heavy stone" in Swedish) is used in English, French, and many other languages as the name of the element, but not in the Nordic countries. "Tungsten" was the old Swedish name for the mineral scheelite. "Wolfram" (or "volfram") is used in most European (especially Germanic, Spanish, and Slavic) languages and is derived from the mineral wolframite, which is the origin of the chemical symbol W.[15] The name "wolframite" is derived from German "wolf rahm" ("wolf soot" or "wolf cream"), the name given to tungsten by Johan Gottschalk Wallerius in 1747. This, in turn, derives from Latin "lupi spuma", the name Georg Agricola used for the element in 1546, which translates into English as "wolf's froth" and is a reference to the large amounts of tin consumed by the mineral during its extraction.

The world's reserves of tungsten are 3,200,000 tonnes; they are mostly located in China (1,800,000 t).

W wav/wau or digamma (value 6 ⬄ Gamma /ˈɡæmə/ (uppercase Γ, lowercase γ; Greek: γάμμα gámma) is the third letter of the Greek alphabet. In the system of Greek numerals, it has a value of 3. In Ancient Greek, the letter gamma represented a voiced velar stop /ɡ/), the name used in ancient Greek and the most common name for the letter in its alphabetic function today. It literally means "double gamma" and is descriptive of the original letter's shape.

Digamma Stigma

Gamma

Greek w

Mycenaean Greek

The sound /w/ existed in Mycenean Greek, as attested in Linear B and archaic Greek inscriptions using digamma. It is also confirmed by the Hittite name of Troy, Wilusa, corresponding to the Greek name *Wilion (Ilium).

Classical Greek

The /w/ sound was lost at various times in various dialects, mostly before the classical period.

In Ionic, /w/ had probably disappeared before Homer's epics were written down (7th century BC), but its former presence can be detected in many cases because its omission left the meter defective. For example, the word ἄναξ ("(tribal) king, lord, (military) leader"), found in the Iliad, would have originally been ϝάναξ /wánaks/ (and is attested in this form in Mycenaean Greek), and the word οἶνος ("wine"), are sometimes used in the meter where a word starting with a consonant would be expected. Further evidence coupled with cognate-analysis shows that οἶνος was earlier ϝοῖνος /wóînos/ (cf. Cretan Doric ibêna, cf. Latin vīnum and English "wine"). There have been editions of the Homeric epics where the wau was re-added, particularly in the late 19th and early 20th centuries, but these have largely fallen out of favour.

Aeolian was the dialect that kept the sound /w/ longest. In discussions by ancient Greek grammarians of the Hellenistic era, the letter is therefore often described as a characteristic Aeolian feature.

Loanwords that entered Greek before the loss of /w-/ lost that sound when Greek did. For instance, Oscan Viteliu ("land of the male calves", compare Latin: vitulus "yearling, male calf") gave rise to the Greek word Italia. The Adriatic tribe of the Veneti was called in Ancient Greek: Ἐνετοί, romanized: Enetoi. In loanwords that entered the Greek language after the drop of /w/, the phoneme was once again registered, compare for example the spelling of Οὐάτεις for vates.

74 (XI) ≍ 20230929+ (9)

In mathematics 74 is:

• the twenty-first distinct semiprime and the eleventh of the form 2×q.
• a palindromic number in bases 6 (2026) and 36 (2236).
• a nontotient.
• There are 74 different non-Hamiltonian polyhedra with a minimum number of vertices.

In science

• The atomic number of tungsten

In astronomy

• Messier object M74, a magnitude 10.5 spiral galaxy in the constellation Pisces.
• The New General Catalogue object NGC 74, a galaxy in the constellation Andromeda.

In music

• Seventy-four, one of the Number Pieces by John Cage

In bus routes

• In the Merseyside, England, Seventy-four is the bus route that runs from Halewood to Liverpool Town Centre.
• In Chicago, "74" is the Fullerton bus which runs from Lincoln Park to Belmont Cragin.
• London Buses route 74 is a Transport for London contracted bus route in London, England. Running between Baker Street station and Putney, it is operated by London General.

Seventy-four is also:

• The year AD 74, 74 BC, or 1974
• Designates the 7400 series of Integrated Chips. 74xx xx=00-4538
• A seventy-four was a third-rate warship with 74 guns.
• The registry of the U.S. Navy's nuclear aircraft carrier USS John C. Stennis (CVN-74), named after U.S. Senator John C. Stennis
• A hurricane or typhoon is a system with sustained winds of at least 74 mph (64 knots).
• The number of the French department Haute-Savoie
• In the Bible, it is the number of people that were in the presence of God on Mount Sinai and saw God without dying “Exodus 24:9-11”