Physical quantity Physical quantity Absorbed dose is a measure of the energy deposited in a medium by ionising radiation. It is equal to the energy deposited per unit mass of medium, and so has the unit J/kg, which is given the special name gray (Gy). ...more on Wikipedia about "Absorbed dose"
In physics, acceleration (symbol: a) is defined as the rate of change (or time derivative) of velocity. It is thus a vector quantity with dimension length/ time². In SI units, this is metre/second². ...more on Wikipedia about "Acceleration"
In electrical engineering, the admittance (Y) is the inverse of the impedance (Z). The SI unit of admittance is the siemens. Oliver Heaviside coined the term in December 1887. ...more on Wikipedia about "Admittance"
Amount of substance of an object is a physical quantity that measures the number of elementary entities in the object compared with the number of elementary entities in 0.012 kilogram of pure carbon-12 (elementary entities may be atoms, molecules, ions, electrons, or particles). This latter quantity is deemed a unit amount of substance. ...more on Wikipedia about "Amount of substance"
Amplitude is a nonnegative scalar measure of a wave's magnitude of oscillation, that is, magnitude of the maximum disturbance in the medium during one wave cycle. ...more on Wikipedia about "Amplitude"
Angular acceleration is the rate of change of angular velocity over time. In SI units, it is measured in radians per second squared (rad/s²), and usually denotes by the Greek letter alpha (). For constant values of angular acceleration, a rotating body conforms to the rotational equations of motion. ...more on Wikipedia about "Angular acceleration"
In physics (specifically mechanics and electrical engineering), angular frequency ω (also called angular speed) is a scalar measure of rotation rate. Angular frequency is the magnitude of the vector quantity angular velocity. The term angular frequency vector is sometimes used as a synonym for the vector quantity angular velocity . ...more on Wikipedia about "Angular frequency"
In physics the angular momentum of an object with respect to a reference point is a measure for the extent to which, and the direction in which, the object rotates about the reference point. ...more on Wikipedia about "Angular momentum"
The angular velocity of a point particle or rigid body describes the rate at which its orientation changes. It is analogous to translational velocity, and is defined in terms of the derivative of orientation with respect to time, just as translational velocity is the derivative of displacement with respect to time. It is customary to introduce the concept of velocity by first defining average velocity as displacement divided by time. There the analogy with angular velocity is less useful: for example, if a body is rotating at a constant angular velocity of one revolution per minute, then over a one-minute period the 'average angular velocity' of the body is zero, because the orientation is exactly the same at the beginning of the time period as it is at the end. ...more on Wikipedia about "Angular velocity"
In telecommunication, antenna noise temperature is the temperature of a hypothetical resistor at the input of an ideal noise-free receiver that would generate the same output noise power per unit bandwidth as that at the antenna output at a specified frequency. ...more on Wikipedia about "Antenna noise temperature"
API Gravity is a specific gravity scale developed by the American Petroleum Institute (API) for measuring the relative density of various petroleum ...more on Wikipedia about "API gravity"
The area density of a two-dimensional object is calculated as the mass per unit area. ...more on Wikipedia about "Area density"
Areal velocity is the rate at which area is swept by the position vector of a point which moves along a curve. Areal velocity is the magnitude of the areal velocity vector, which is parallel (but not necessarily proportional in magnitude) to the angular velocity vector. ...more on Wikipedia about "Areal velocity"
Backpressure usually refers to the pressure exerted on a moving fluid by obstructions or tight bends in the confinement vessel along which it is moving, such as piping or air vents, against it's direction of flow. For example, an automotive exhaust muffler with a particularly high number of twists, bends, turns and right angles could be described as having particularly high backpressure ** . The term is also used analogously in the field of information technology to describe the build-up of data behind an I/O switch if the buffers are full and incapable of receiving any more data; the transmitting device halts the sending of data packets until the buffers have been emptied and are once more capable of storing information ** . ...more on Wikipedia about "Back pressure" Pure http://www.shortopedia.com. Pure Information Power. shortopedia
In telecommunications and computing, bit rate (sometimes written bitrate or Rbit) is the frequency at which bits are passing a given (physical or metaphorical) "point". It is quantified using hertz, the SI unit of frequency, or the bit per second (bit/s) unit. ...more on Wikipedia about "Bit rate"
Capacitance is a measure of the amount of electric charge stored (or separated) for a given electric potential. The capacitance is usually defined as the total electric charge placed on the object divided by the potential of the object: ...more on Wikipedia about "Capacitance"
In radio communications, characteristic impedance ( acoustic impedance or sound impedance) of a uniform transmission line is the impedance of a circuit that, when connected to the output terminals of a line of arbitrary length, causes the line to appear infinitely long. This is sometimes called surge impedance. ...more on Wikipedia about "Characteristic impedance"
Charge density is the amount of electric charge per length, area, or volume. ...more on Wikipedia about "Charge density"
Chromatic aberration is caused by the dispersion of the lens material, the variation of its refractive index n with the wavelength of light. The term purple fringing is also commonly used. ...more on Wikipedia about "Chromatic aberration"
:Cir is the standard astronomical abbreviation for the constellation Circinus ...more on Wikipedia about "CIR"
Circular dichroism (CD), is the differential absorption of left and right hand circularly polarized light. It is a form of spectroscopy used to determine the optical isomerism and secondary structure of molecules. ...more on Wikipedia about "Circular dichroism" My shortopedia is mine.
The coefficient of thermal expansion is used in two ways: ...more on Wikipedia about "Coefficient of thermal expansion"
In material science, the coercivity, also called the coercive force, of a ferromagnetic material is the intensity of the magnetic field required to reduce the magnetization of that material to zero after the magnetization of the sample has reached saturation. Coercivity is usually measured in oersteds or teslas. ...more on Wikipedia about "Coercivity"
Colorimetry is the science that describe colors in numbers, or provides a physical color match using a variety of measurement instruments. ...more on Wikipedia about "Colorimetry"
Couple, as a noun, is close in meaning to pair, can refer to: ...more on Wikipedia about "Couple"
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