All articles starting with F
15,892 articles
FREYR Battery
FREYR Battery is a battery cell developer founded in Norway in 2018 to produce cells at Mo i Rana; it raised about $1 billion and rebranded as T1 Energy in 2025.
Freyssinet (company)
Freyssinet is a French specialist civil engineering company founded in 1943 by Eugène Freyssinet, best known for prestressed concrete and post-tensioning; it is part of Soletanche Freyssinet within VINCI Construction.
Freysteinn Sigmundsson
Freysteinn Sigmundsson (born 1966) is an Icelandic geophysicist at the University of Iceland who studies volcano geodesy, tracking magma movement, and led a Nature paper on the 2021 Fagradalsfjall eruption.
Fri(end)s
Fri(end)s (FRI(END)S) is a March 15, 2024 English-language pop soul R&B digital single by V (Kim Taehyung) of BTS, his first solo release after Layover, about ending a friendship to become lovers.
Friagabi Fossae
Friagabi Fossae: a fossa (long, narrow depression) feature on Venus, 141 km across, centered at 50.2°N 109.5°E, IAU-approved 1985, named for an Old English goddess connected with Mars.
Friant Dam
Friant Dam is a concrete gravity dam on the San Joaquin River near Fresno, California, built 1939 to 1942; it impounds Millerton Lake and feeds the Central Valley Project.
Friant-Kern Canal
The Friant-Kern Canal is a 152-mile irrigation canal in Central California, running from Friant Dam on the San Joaquin River to the Kern River near Bakersfield.
Friar
A friar is a member of a mendicant religious order like the Franciscans, Dominicans, Carmelites, or Augustinians, who ministers among the public rather than remaining enclosed in a monastery.
Friar Park
Friar Park is a Victorian Gothic country house with ornamental gardens on the western edge of Henley-on-Thames, Oxfordshire, built from 1889 for Sir Frank Crisp and known as George Harrison's home.
Friar Tuck
Friar Tuck, the jolly fighting friar of the Robin Hood legend, first joined the band in the c. 1475 play Robyn Hod and the Shryff off Notyngham; his name appears earlier in 1417-1429 writs naming chaplain Robert Stafford, and he is absent from the medieval ballads.
Friars Wash Roman Temple
Friars Wash Roman Temple: a group of Romano-British temples and shrines at Redbourn, Hertfordshire, near Verulamium and Watling Street, investigated by Time Team in 2008; a pair of unusual Romano-Celtic temples plus a circular shrine, in use from the 2nd to the late 4th century AD.
Fribourg
Fribourg (Freiburg im Üechtland), Swiss cantonal capital founded 1157 by Berthold IV of Zähringen on the Sarine; bilingual city-state until 1481, with a preserved medieval old town, 200 Gothic façades, and the bilingual University of Fribourg (1889).
Fricassee
Fricassee (French fricassée) is a white stew of cut-up meat, usually chicken or veal, seared without browning, simmered in stock, and served in a creamy white sauce; the English word dates to 1568.
Fricative
A fricative is a consonant produced by forcing air through a narrow constriction so the airflow becomes turbulent, as in English f, s, and sh.
Fricio Caicedo
Fricio Caicedo (Fricio David Caicedo Jaramillo), born 2008, is an Ecuadorian left-footed centre-back, 1.95 m, from the LDU Quito academy, loaned from FC Moravia FCM to Inter Miami CF in July 2026; one senior Ecuador cap.
Fricis Bārda
Fricis Bārda (1880–1919) was a Latvian poet, teacher, and essayist regarded as a leading representative of neoromanticism in Latvian literature, brother of poet Anton Bārda.
Frick Collection
The Frick Collection is a New York art museum in Henry Clay Frick's 1914 Fifth Avenue mansion, opened in 1935, holding about 1,800 European fine and decorative arts, with the Frick Art Research Library and a 2025 Selldorf renovation.
Friction
Friction, also called frictional force, is the force that opposes relative motion between surfaces in contact. Its empirical laws were stated by da Vinci, Amontons, and Coulomb.
Friction blister
Friction blister (ICD-11 EH92.1), an intraepidermal blister from repetitive shear deformation, typically in the stratum spinosum of palms, soles, and toes; treated by drainage and dressings, prevented by socks, insoles, and tape.
Friction cone
A friction cone is the set of forces a contact can transmit without slipping, defined by Coulomb's limit that tangential force not exceed the friction coefficient times the normal force.
Friction drive
A friction drive is a mechanical power transmission that passes torque between smooth rotating surfaces pressed together by friction, with no gears, used in early automobiles and precision actuators.
Friction hysteresis
Friction hysteresis is the history dependence of friction force, where the force curve traces a closed loop whose area is dissipated energy, prominent in pre-sliding contact.
Friction pendulum bearing
The friction pendulum bearing, or Friction Pendulum System, is a seismic isolation device patented by Victor Zayas in 1987 that supports buildings on a spherical sliding surface.
Friction stir lap welding
Friction stir lap welding (FSLW) is a solid-state welding process in which a rotating tool joins overlapping metal sheets without melting them, used for thin sheets and dissimilar metals in vehicle and aircraft structures.
Friction stir processing
Friction stir processing is a solid-state metalworking method in which a rotating tool stirs metal below its melting temperature, refining grains and healing defects without changing the part's shape.
Friction stir spot welding
Friction stir spot welding (FSSW) is a solid-state process that joins overlapping metal sheets without melting. It is an alternative to resistance welding used in automotive and aerospace.
Friction stir welding
Friction stir welding (FSW) is a solid-state welding process invented at TWI in Cambridge, England, in 1991, in which a rotating tool joins metals without melting them.
Friction zone
The friction zone is the range of a motorcycle's clutch lever travel where the clutch is partially engaged, letting riders start smoothly and control speed.
Friction-induced vibration (squeal)
Friction-induced vibration, known as squeal, is a self-excited vibration in which sliding friction feeds energy into the resonant modes of sliding bodies, producing intense noise in brakes, railway wheels, and clutches.
Frictional Games
Frictional Games, Swedish indie studio founded 2006 by Thomas Grip and Jens Nilsson, creator of Penumbra, Amnesia: The Dark Descent, and SOMA; known for combat-free first-person horror and the upcoming Ontos.