All articles starting with G
18,970 articles
Groucho Marx
Groucho Marx (Julius Henry Marx, 1890–1977), American comedian, front man of the Marx Brothers in vaudeville, Broadway, and film, later host of You Bet Your Life on radio and TV.
Ground (electricity)
Ground, called earth in British usage, is a conductive body that electrical systems connect to so short-circuit or lightning current follows a controlled, low-resistance route.
GROUND (musician)
GROUND, also known as DJ Ground, is the alias of Pascal Schubert, a Swiss drum and bass producer signed to Overview Music and Flexout Audio.
Ground and neutral
Ground and neutral are two distinct conductors in electrical wiring: the neutral carries current back to the source, while the ground provides a safe fault-current path.
Ground beef
Ground beef (beef mince) is beef chopped fresh or frozen with at most 30% fat and no added fat, water, binders, or extenders; hamburger may add fat. Largest beef item sold by volume; cook to 160°F.
Ground Delay Program
A ground delay program is an FAA traffic management process that holds flights at their departure airports and assigns arrival slots to meter demand at a congested destination airport.
Ground effect (aerodynamics)
Ground effect, or Wing In Ground Effect, is the increase in lift-to-drag ratio a wing gains when flying close to a surface, felt within about half a wingspan.
Ground fault
A ground fault is an unintended electrical connection between an energized conductor and ground, letting current escape its normal path, sometimes through a person, and can start fires in solar arrays.
Ground Floor
Ground Floor is a 2013-2015 American TBS sitcom created by Bill Lawrence and Greg Malins, starring Skylar Astin, Briga Heelan, and John C. McGinley in an upstairs-downstairs workplace romance; two seasons, 20 episodes, cancelled in 2015.
Ground freezing
Ground freezing (artificial ground freezing, AGF) is a geotechnical construction method that circulates refrigerant through drilled pipes, freezing pore water into a temporary ice-soil mass that strengthens ground and cuts off water.
Ground granulated blast-furnace slag
Ground granulated blast-furnace slag, also called GGBS or slag cement, is a finely ground byproduct of iron production in a blast furnace used to replace Portland cement in concrete.
Ground handling and ramp accidents
Ground handling and ramp accidents are accidents during aircraft ground operations, including pushback, towing, refuelling, and loading, injuring about 243,000 people and costing roughly $4 billion annually.
Ground level enhancement
A ground level enhancement (GLE) is a sudden rise in counts at ground-based cosmic ray detectors, chiefly neutron monitors, caused by solar particles energetic enough to reach the ground.
Ground loop (aviation)
A ground loop is the rapid, uncontrolled rotation of a fixed-wing aircraft on the ground, most often during the after-landing roll, and is especially common in tailwheel airplanes.
Ground loop (electricity)
A ground loop, also known as an earth loop, is an unwanted current path formed when grounded points at different potentials are connected, causing 50 or 60 Hz hum.
Ground meat
Ground meat, also called minced meat or mince, is meat cut into small particles by grinding or chopping. Key facts: US ground beef versus hamburger labeling, 160°F cooking standard, E. coli O157:H7 adulterant rule, worldwide dishes.
Ground motion prediction equation
A ground motion prediction equation, also called a ground motion model or attenuation relationship, is an empirical equation predicting ground shaking from earthquake magnitude and distance.
Ground News
Ground News is a Canadian news aggregation service, founded by Harleen Kaur and Sukh Singh in 2017, that labels each source with political bias, factuality, and ownership data.
Ground plane
A ground plane is a large continuous copper area on a printed circuit board or near an antenna, serving as a common voltage reference and low-impedance current return path.
Ground pressure
Ground pressure is the vertical stress a wheel, track, or outrigger exerts on the ground per unit contact area, and it determines whether machinery sinks into soft terrain.
Ground proximity warning system
The ground proximity warning system (GPWS) is an aircraft instrument that warns pilots of unintended flight toward terrain with spoken alerts like "whoop whoop, pull up."
Ground rent
Ground rent: recurring leasehold payment to a freeholder for the land, unrelated to services; in England and Wales capped at a peppercorn for new leases by the 2022 Act, with a £250 cap proposed for existing leases.
Ground response analysis
Ground response analysis is a geotechnical earthquake engineering method that models how layered soil modifies seismic ground motion, producing surface response spectra and amplification factors for seismic design.
Ground screw (solar mounting)
A ground screw is a steel foundation element with helical plates, screwed into the soil to anchor solar PV arrays without concrete, excavation, or curing time.
Ground shark (cryptid)
Ground shark (cryptid): a legendary giant man-eating shark of the Timor Sea, first recorded by Willy Ley in 1941, said to lack a dorsal fin and ambush prey on the seabed; likely a misidentified wobbegong or sixgill shark.
Ground sloth
Ground sloths: extinct terrestrial sloths (Folivora, Xenarthra) of the Americas, from Alaska to Argentina, ranging from 3 kg Neocnus to 6,500 kg Eremotherium; extinct about 11,000 years ago after long human overlap.
Ground spider
Ground spider (Gnaphosidae, also stealthy ground spiders): a worldwide spider family of 154 genera and 2,514 species of nocturnal ground hunters with cylindrical spinnerets and enlarged piriform gland spigots; not monophyletic per recent phylogenies.
Ground squirrel
Ground squirrels are burrowing, ground-dwelling squirrels (Sciuridae), formerly genus Spermophilus, split in 2009 into eight genera. Known for deep hibernation torpor, supercooling in arctic ground squirrels, ecosystem engineering, and agricultural pest status.
Ground state
In quantum mechanics, the ground state is the allowed state of lowest energy, labeled ψ₀; its energy need not be zero, as the harmonic oscillator's zero-point energy shows.
Ground station
A ground station, also called a tracking station or Earth terminal, is a terrestrial facility with antennas that communicates with spacecraft, sending commands and receiving data.