Mo
- Mo
- Molybdenum is a lustrous, silvery coloured metal that resembles tungsten with which it tends to be paired in the transition series in the periodic table.
- Mobility
- The ratio of the carrier velocity to the applied electric field.
- Mockup
- A full-sized replica or dummy of something.
- MoCl2
- Chemical formula for Molybdenum II Chloride.
- MoCl4
- Chemical formula for Molybdenum IV Chloride.
- Modal Analysis
- The process of determining a set of generalized coordinates for a system such that the equations of motion are both inertially and elastically uncoupled.
- MODbus
- Communication protocol developed by Modicon; widely used in SCADA and process control applications.
- Mode
- The most frequently occurring value in a sequence of numbers.
- Mode Coupling
- Energy exchange between modes of light propagating in an optical fibre.
- Mode Shape
- The relative position of all points on a structure at a given natural frequency.
- Model
- A copy of an object that is n times smaller than the fullsize object.
- Model Engineering
- Lists all Model Engineering topics in the Encyclopaedia
- Model Engineering Weblinks
- Lists all Model Engineering Weblinks in the Encyclopaedia
- Model Engineers Thread
- A thread based upon the Whitworth thread form that was established in 1912.
- Modelica
- Open modelling language that supports expression=expression rather than just variable=expression
- Modeling
- A simplification of the real-life object and situation that preserves their essential nature, and allows a solution using mathematics.
- Modem
- A device whose name combines the term modulate with demodulate which refers to its ability to transmit and receive data superimposed on a carrier frequency.
- Moderator
- A material used to slow down the neutrons in a nuclear reactor.
- Modular Arithmetic
- This is can be used as method for finding remainders where all the possible numbers (the numbers less than the divisor) are put in a circle, and then by counting around the circle the number of times of the number being divided, the remainder will be the final number landed on.
- Modular Number System
- A number system represented best by numbers on a circle because the numbers repeat.
- Modulated Wave
- A complex wave consisting of a carrier and a modulating wave.
- Modulating Valve
- A valve which can be positioned anywhere between fully on and fully off to proportion the rate of flow in response to a modulating controller.
- Modulation
- The process, or the result of the process, by which a characteristic of one wave is varied according to some characteristic of another wave.
- Modulation Factor
- The ratio of the peak variation of the envelope from its reference value, to the reference value.
- Modulation Index
- In frequency modulation with a sinusoidal modulating wave, the ratio of the frequency deviation of the modulated wave to the frequency of the modulating function.
- Modulator
- A device that produces modulation.
- Module
- The measurement that architects use to determine the proportions of a structure, for example, the diameter of a column.
- Modulo
- The integers a and b are said to be congruent modulo m if a-b is divisible by m.
- Modulus
- The absolute value of a quantity, not considering it's sign or direction.
- Modulus in Bending
- Ratio of maximum fibre stress to maximum strain, within elastic limit of stress-strain diagram obtained in flexure test.
- Modulus of Elasticity
- The modulus of elasticity is the slope of the stress-strain diagram in the linear region.
- Modulus of Elasticity in Shear
- Another name for Shear Modulus.
- Modulus of Rigidity
- Another name for Shear Modulus.
- Modulus of Rupture
- Breaking strength in a non-ductile solid as measured by bending.
- Modulus of Strain Hardening
- Rate of change of true stress as a function of true strain in a material undergoing plastic deformation.
- Modulus of Toughness
- The work done on a unit volume of material as a simple tensile force is gradually increased from zero to the value causing rupture.
- MoF6
- Chemical formula for Molybdenum Hexafluoride.
- Mohl, Hugo von
- Botanist who found that plant cells were composed of a living substance and used the term protoplasm much as we do today.
- Mohs
- A hardness scale developed by F. Mohs in 1812 where the hardness of a material is compared with that of a mineral.
- Mohs, Friederich
- German geologist and inveenter of the hardness scale named after him.
- Moire Fringes
- A pattern formed by the interference between two regular sets of divisions.
- mol
- Abbreviation of Mole, the SI unit of Amount of Substance.
- Molality
- Concentration measured as moles of solute per kilogram of solvent.
- Molar
- Pertaining to moles or a synonym for molarity.
- Molar Flow Rate
- The number of moles per unit time moving through a process.
- Molar Gas Constant
- R = 8.31441 JK-1mol-1
- Molar Heat Capacity
- The amount of heat required to raise the temperature of 1mol of a substance through 1K.
- Molar Heat of Combustion
- The amount of energy released in burning completely one mole of substance.
- Molar Mass
- The mass of one mole of a material.
- Molar Volume
- The volume occupied by one mole of a substance under specified conditions.
- Molarity
- Concentration of a solution measured as the number of moles of solute per litre of solution.
- Mole
- The SI unit of the Amount of Substance. It is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12.
- Mole Fraction
- The number of moles of a particular substance expressed as a fraction of the total number of moles.
- Mole Grips
- A type of pliers with locking jaws that can be used as pliers, wrench, clamp, or small vice.
- Molecular Equation
- A molecular equation is a balanced chemical equation in which ionic compounds are written as neutral formulas rather than as ions.
- Molecular Formula
- Shows the number of atoms of each element present in a molecule.
- Molecular Geometry
- Shape of a molecule, based on the relative positions of the atoms.
- Molecular Orbital
- A wavefunction that describes the behaviour of an electron in a molecule.
- Molecular Sieve
- A material that contains many small cavities interconnected with pores of precisely uniform size.
- Molecular Slip
- The existence of a finite net gas velocity at the surface of very small particles resulting in a lower drag force.
- Molecular Weight
- The combined weight (as given on the periodic table) of all the elements in a compound.
- Molecularity of a Reaction
- The number of species forming the transition state.
- Molecule
- The smallest part of an element or of a covalently bonded compound that can exist independently and still retain the ordinary chemical properties of that element or compound.
- Molten Carbonate Fuel Cells
- Carbonate salts are the electrolyte. Heated to 650deg;C, the salts melt and conduct carbonate ions (CO3) from the cathode to the anode.
- Molybdate
- A compound containing an oxoanion with molybdenum in its highest oxidation state of 6.
- Molybdenum
- A lustrous, silvery coloured metal that resembles tungsten with which it tends to be paired in the transition series in the periodic table.
- Molybdenum Dichloride
- Alternative name for Molybdenum II Chloride.
- Molybdenum Dioxide
- Alternative name for Molybdenum IV Oxide.
- Molybdenum Disilicide
MoSi2
A refractory ceramic with primary use in heating elements.
- Molybdenum Disulphide
MoS2
The appearance and feel of molybdenum disulphide is similar to graphite. As per graphite, it is widely used as a solid lubricant because of its low friction properties, sometimes to relatively high temperatures.
- Molybdenum Hexacarbonyl
C6O6Mo
A colourless solid noteworthy as a volatile, air-stable derivative of a metal in its zero oxidation state. Used in electron beam-induced deposition techniques.
- Molybdenum Hexafluoride
MoF6
A solid which melts just below room temperature and hydrolyses in water to give hydrofluoric acid.
- Molybdenum II Chloride
MoCl2
Attracts attention from researchers because of the unexpected structures seen for these compounds and the fact that they give rise to hundreds of derivatives.
- Molybdenum IV Chloride
MoCl4
Black solid inorganic compound.
- Molybdenum IV Oxide
MoO2
Violet coloured solid that is a metallic conductor.
- Molybdenum Pentachloride
- Alternative name for Molybdenum V Chloride.
- Molybdenum Tetrachloride
- Alternative name for Molybdenum IV Chloride.
- Molybdenum Trioxide
MoO3
Used as an oxidation catalyst and as a raw material for the production of molybdenum metal.
- Molybdenum V Chloride
Cl10Mo2
Dark volatile solid is an important starting reagent in the preparation of molybdenum compounds.
- Molybdic Anhydride
- Alternative name for Molybdenum Trioxide.
- Moments of Inertia
- Principal axes for bodies of uniform density.
- Momentum
- Usually refers to linear momentum, a vector quantity equal to the product of an object's mass and its velocity.
- Monatomic Ion
- An ion formed from a single atom by the loss or gain of electrons.
- Monel
- Strong and corrosion resistant. Applications include: turbine blades, propellers, pump fittings, ...
- Monic Polynomial
- A polynomial in which the coefficient of the term of highest degree is 1.
- Monobromomethane
- Alternative name for Bromomethane.
- Monochloroethane
- Alternative name for Chloroethane.
- Monochromatic
- Radiation that has a single wavelength.
- Monocoque
- A type of construction in which all or most of the stresses are carried by the skin.
- Monocrystalline Solar Cell
- More expenive to make as the crystals are grown under carefully controlled conditions.
- Monodentate
- A ligand that has only one atom that coordinates directly to the central atom in a complex.
- Monogenetic
- A volcano built by a single eruption.
- Monogermane
- Alternative name for Germane.
- Monolithic
- An object that is one piece and not composed of several pieces connected together.
- Monolithic Circuit
- A circuit where all elements associated with the circuit are fabricated inseparably within a continuous piece of material.
- Monolithic Dome
- A dome composed of a series of arches, joined together with a series of horizontal rings called parallels.
- Monomer
- A molecule that, under the correct conditions, can link together with others to form larger molecules called polymers.
- Monomial
- An algebraic expression consisting of just one term.
- Monophonic
- Single-channel sound.
- Monoplane
- An aircraft with one set of wings.
- Monorail
- A single rail train system.
- Monoside
- A single pressed side of a vehicle body.
- Monosilane
- Alternative name for Silane.
- Monosodium Glutamate
C5H8NNaO4
A sodium salt of glutamic acid, a naturally occurring non-essential amino acid.
- Monostable
- Circuit with two states. Only one state is stable.
- Monotone
- A sequence is monotone if its terms are increasing or decreasing.
- Monotonic
- Designating sequences, the successive members of which either consistently increase or decrease but do not oscillate in relative value.
- Monotube Shock Absorber
- A common type of shock absorber with the working cylinder and reservoir contained in one tube.
- Monte Carlo Calculations
- Simulation based upon events that happen randomly, and so the outcome of a calculation is not always absolutely predictable.
- Montgolfier, Jacques Etienne
- Jacques and brother Joseph made the first successful hot-air balloon flight in 1782.
- Montgolfier, Joseph
- Joseph and brother Jacques made the first successful hot-air balloon flight in 1782.
- Montone
- A sequence is monotone if its terms are all increasing or all decreasing.
- Montroydite
- Another name for Mercury II Oxide.
- MoO2
- Chemical formula for Molybdenum IV Oxide.
- MoO3
- Chemical formula for Molybdenum Trioxide.
- Moon
- Basic Moon data.
- Moore′s Law
- This states that the number of devices on a silicon chip could double each year.
- Morgan, Thomas Hunt
- Biologist and Nobel Prize winner who contributed to the knowledge of the mechanism of heredity.
- Mormon Clamp
- A term applied to a clamp installed around a cylindrical object to connect two halves together.
- Morning Star
- Name given to Venus when observed in the morning, also known as Hosperus.
- Morse Code
- The International Morse Code used to transmit signals by wire or by radio using short and long duration signals.
- Morse Taper
- A self-holding standard taper largely used on small cutting tools.
- Mortise
- A cavity or hole cut to allow a tennon to pass through to make a joint.
- MoS2
- Chemical formula for Molybdenum Disulphide.
- Moseley, Henry Gwyn-Jeffreys
- English physicist who demonstrated that the number of electrons in an element is the same as the atomic number, establishing the significance of the atomic number.
- MOSFET
- In a MOSFET device the gate is insulated from the channel by a very thin (typically less than the wavelength of light) layer of glass (silicon dioxide) and the gate is either metal or doped silicon (polysilicon), hence the acronym metal-oxide semiconductor.
- MoSi2
- Chemical formula for Molybdenum Disilicide.
- mOsm
- Abbreviation of milliosmole.
- Mossbauer Spectrometer
- An instrument that provides information on the bonding of an atom in a mineral by bombarding it with gamma rays.
- Most Significant Bit (MSB)
- The bit within a digital word that represents the biggest possible single-bit coded value.
- Mother Liquor
- The solution in recrystallization.
- MotherBoard
- The main circuit board of a PC to which everything connects.
- Motion Sickness
- Defined specifically to describe nausea, vomiting and colour changes. It does not include discomfort.
- Motive Power
- A natural agent, as water, steam, wind, electricity, etc., used to impart motion to machinery; a motor; a mover.
- Motor
- A mechanism doing work by means of a ready source of energy, such as electric current, compressed air, or oil under pressure.
- Motor Rule
- Also known as Fleming′s Left Hand Rule, this is a way of determining the direction of a force on a current carrying conductor in a magnetic field.
- Moulding
- The process of manufacturing by shaping pliable raw material using a rigid frame or model called a pattern.
- mounce
- A unit of mass, equal to 25 grams.
- Mouse
- A device used to move a pointer around on the computer screen.
- Movable Bridge
- A bridge in which the deck moves to clear a navigation channel.
- Moving Average
- The average of the most recent n data values.
- Moving Ground Plane Wind Tunnel
- A wind tunnel with a system that allows the floor to be moved relative to the test object and matched in speed to the bulk air flow.
- Moving Picture Experts Group
- A working group within SMPTE who set, among other things, specifications for compression schemes for audio and video transmission.
- Moving Pictures Experts Group
- A working group within SMPTE who set, among other things, specifications for compression schemes for audio and video transmission.
- Moving Vane Meter Movement
- A meter movement that uses the magnetic repulsion of the like poles created in two iron vanes by current through a coil of wire.