- Gallium is one of four metals which can be liquid at room temperature
- Chemical formula for Gallium III Iodide.
- Chemical formula for Gallium III Oxide.
- Chemical formula for Gallium III Selenide.
- Chemical formula for Gallium III Telluride.
- Abbreviation of Glacial Acetic Acid.
- Chemical formula for Gallium Arsenide.
- Gable Wall
- The triangular wall beneath the end of a gable roof.
- Chemical formula for Gallium III Bromide.
- Chemical formula for Gallium III Chloride.
- A silvery white metal which is ductile and malleable. It is stable in a dry atmosphere but forms an oxide coating when exposed to moist air.
- Gadolinium III Chloride
A colourless, hygroscopic, water-soluble solid.
- Chemical formula for Gallium III Fluoride.
- The ratio of the output level of a circuit to the input. This will be positive for an amplifier and negative for an attenuator.
- Gain Bandwidth Product
- The number that results when the gain of a circuit is multiplied by the bandwidth of that circuit.
- Abbreviation of gallon.
- Galactic Corona
- A huge spherical region that exists around our own and other spiral galaxies.
- Galactic Disc
- The plane in which the spiral arms of spiral galaxies or barred spiral galaxies exist.
- Galactic Year
- The unit of time in which the Solar System makes one revolution around the Milky Way galaxy.
- A system of about 100 billion stars.
- Galaxy Clusters
- Groups of galaxies that may contain up to a few thousand galaxies.
- A Lead Sulphide and the most common ore of lead.
- Galilean Principle of Relativity
- The laws of motion are the same in all inertial reference systems.
- The CGS unit of acceleration, one galileo is an acceleration of 1 centimetre per second per second.
- Galileo Galilei
- Astronomer, mathematician and physicist he dwelt, not on the useless question, why do things happen? but, how do things happen?
- A severe form of adhesive wear which occurs during sliding contact of one surface relative to another.
- One of four metals which can be liquid at room temperature.
- Gallium Arsenide
A crystalline, high-efficiency compound used to make certain types of solar cells and semiconductor material.
- Gallium II Selenide
Has been used as a non-linear optical material.
- Gallium II Telluride
Made by reacting the elements or by metal organic vapour deposition.
- Gallium III Bromide
White powder that is soluble in water.
- Gallium III Chloride
The main precursor to most derivatives of gallium and a reagent in organic synthesis.
- Gallium III Fluoride
- Gallium III Hydroxide
The normal form of Gallium in the Earth′s crust.
- Gallium III Iodide
The most common iodide of gallium.
- Gallium III Oxide
White crystalline powder prepared by thermal decomposition of gallium salts.
- Gallium III Selenide
P-type semiconductor. Reddish-black crystals with a slight garlic odour.
- Gallium III Telluride
Used as a semiconductor.
- Gallium Monoselenide
- Alternative name for Gallium II Selenide.
- Gallium Nitride
A binary III/V direct bandgap semiconductor commonly used in bright light-emitting diodes.
- Gallium Phosphide
Used in the manufacture of low-cost red, orange, and green light-emitting diodes.
- Gallium Sesquioxide
- Alternative name for Gallium III Oxide.
- Gallium Tribromide
- Alternative name for Gallium III Bromide.
- Gallium Trichloride
- Alternative name for Gallium III Chloride.
- Gallium Trifluoride
- Alternative name for Gallium III Fluoride.
- Gallium Trihydroxide
- Alternative name for Gallium III Hydroxide.
- Gallium Triiodide
- Alternative name for Gallium III Iodide.
- Gallium Trioxide
- Alternative name for Gallium III Oxide.
- Gallium Triselenide
- Alternative name for Gallium III Selenide.
- This unit of volume is defined in the British and American system of units. Note 1 UK gallon = 1.2 US gallons.
- Gallons per Minute
- Volume flow rate.
- Galloway Tubes
- Tapered thermic syphon water-tubes inserted in the furnace of a Lancashire boiler.
- Galvanic Cell
- A cell in which chemical change is the source of electrical energy.
- Galvanic Corrosion
- Corrosion associated with the current of a galvanic cell consisting of two dissimilar conductors in an electrolyte or two similar conductors in dissimilar electrolytes.
- Galvanic Couple
- A pair of dissimilar conductors, commonly metals, in electrical contact.
- Galvanic Current
- The electric current that flows between metals or conductive nonmetals in a galvanic couple.
- Galvanic Series
- This determines the nobility of metals and semi-metals and ranks them, note that this rank is dependent on the electrolyte that the metal is submerged in.
- To coat a metal surface with zinc using various processes.
- An instrument for detecting and measuring a small electric current by movements of a magnetic needle or of a coil in a magnetic field.
- An archaic name for Electroforming.
- An electronic instrument that controls the current through an electrochemical cell at a preset value, as long as the needed cell voltage and current do not exceed the compliance limits of the galvanostat.
- Galvanostatic Technique
- An electrochemical measuring technique for electrochemical analysis or for the determination of the kinetics and mechanism of electrode reactions based on the control of the current flowing through the system.
- Game Theory
- A branch of mathematics that seeks to model decision making in conflict situations.
- A reproductive cell, in humans the male cell is a sperm the female cell is the ovum.
- A letter of the Greek alphabet.
- Gamma Iron
- The face-centered cubic form of pure iron, stable from 910 to 1400°C.
- Gamma Rays
- Gamma rays are electromagnetic waves or photons emitted from the nucleus (centre) of an atom.
- Gamma Stirling Engine
- A beta Stirling engine in which the power piston is not mounted coaxially to its displacer piston.
- Gamme Ring Armature
- An inefficient type of armature winding in which many of the turns are shielded from the field by its own iron ring.
- Chemical formula for Gallium Nitride.
- Gang Milling
- A milling setup where a number of cutters are arranged on an arbor so that several surfaces can be machined at one time.
- Ganged Tuning
- The process used to tune two or more circuits with a single control.
- Gantt Chart
- Graph showing steps of plan and durations.
- Chemical formula for Gallium Phosphide.
- A spout placed on the roof gutter of a Gothic building to carry away rainwater, commonly carved fancifully as in the shapes of animal heads.
- Matter with no definite shape or volume.
- Gas Bearing
- A journal or thrust bearing lubricated with gas.
- Gas Cap
- The gas immediately in front of a body as it travels through the atmosphere.
- Gas Constant
- Molar Gas Constant, R = 8.31441 JK-1mol-1
- Gas Diffusion
- Mixing of two gases caused by random molecular motions.
- Gas Laser
- A type of laser in which the laser action takes place in a gas medium.
- Gas Laws
- The thermodynamic laws applying to perfect gases.
- Gas Mark
- Gas cooker temperature scale.
- Gas Metal Arc Welding
- An arc welding process that produces coalescence of metals by heating them with an arc between a continuous filler metal electrode and the work pieces.
- Gas Pedal
- A pedal that when pressed is connected to the engine and demands more torque.
- Gas Pocket
- A weld cavity caused by the trapping of gases released by the metal when cooling.
- Gas to Liquid Technology
- Gas-to-liquid conversion technologies that use chemical or physical means to convert natural gas to a liquid form suitable for road transport or direct use.
- Gas Turbine
- A turbine driven by the expansion of burning fuel.
- Gas Turbine Efficiency
- For a simple cycle gas turbine the efficiency is determined by the pressure ratio of the compressor.
- Gas Welding
- A process in which the welding heat is obtained from a gas flame.
- Chemical formula for Gallium II Selenide.
- A process for converting materials such as coal, petroleum, or biomass, into carbon monoxide and hydrogen by reacting the raw material at high temperatures with a controlled amount of oxygen.
- A thin layer of material placed between two surfaces or joints to make a tight seal.
- Ethanol mixture that contains 10% ethanol, 90% unleaded gasoline.
- Gasoline Gallon Equivalent
- A unit for measuring alternative fuels so that they can be compared with gasoline on an energy equivalent basis.
- One of the terminals of a Field Effect Transistor (FET).
- Gate Valve
- A straight through pattern valve in which closure element is a wedge situated between two fixed seating surfaces, with means to move it in or out of the flow stream in a direction perpendicular to the pipeline axis.
- Chemical formula for Gallium II Telluride.
- Gated Automatic Gain Control
- Circuit that permits automatic gain control to function only during short time intervals.
- Any hardware or software that is used for the purpose of providing access from one system to another.
- The process of selecting those portions of a wave that exist during one or more selected time intervals or that have magnitudes between selected limits.
- Commonly used to describe the thickness of sheet material.
- Gauge Blocks
- Steel blocks machined to extremely accurate dimensions.
- Gauge Glass
- Part of the water level gauge, which normally consists of a vertical glass tube connected top and bottom to the boiler backplate.
- Gauge Pressure
- Zero referenced against ambient air pressure, so it is equal to absolute pressure minus atmospheric pressure.
- A unit of magnetic field strength, 10-4 tesla.
- Gauss Law for Magnetic Fields
- The magnetic flux through a closed surface is zero; no magnetic charges exist.
- Gaussian Curve
- Normal Distribution.
- Gaussian Distribution
- A continuous probability distribution that often gives a good description of data that cluster around the mean.
- Gaussian Noise
- Another name for Random Noise.
- Gaussian Optics
- Optical characteristics limited to infinitesimally small pencils of light.
- Gauss′s Law
- The electric flux through a closed surface is proportional to the algebraic sum of electric charges contained within that closed surface.
- Gay-Lussac, Joseph Louis
- Developed the law of volumes concerning the combination of gases and discovered boron.
- Gay-Lussac′s Law
- When gases react, they do so in a definite proportion by volume, if the volumes are measured at the same pressure and temperature.