
Review of Short Phrases and Links 
This Review contains major "Unit Area" related terms, short phrases and links grouped together in the form of Encyclopedia article.
 That is, the power per unit area per unit frequency interval.
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 The flow of charge is measured by the current, which is the amount of charge that flows across the surface per unit area and in unit time interval.
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 The current density is an area density, I.e., is the current per unit area.
 Iridium satellites together use 80% more power than Globalstar's, yet employ antennas nearly twice as large and offer 18.2 times less capacity per unit area.
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 Of the world's major protein sources, soybeans provide the largest amount of protein per unit area, while beef livestock provide the least.
 Tensile strength is measured in units of force per unit area.
 Application Rate: The rate at which a material is applied per unit area.
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 Pressure is an expression of the force required to stop a fluid from expanding, and is usually stated in terms of force per unit area.
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 Electric heat can be accurately applied at the precise point needed in a process, at high concentration of power per unit area or volume.
 It can also be considered as the circulation per unit area at a point in a fluid flow field.
 Multiple cropping can help feed the growing population by intensifying production per unit area of existing and potentially arable land.
 The heat transfer through the head is about 5 to 13 times as much heat per unit area as the cylinder walls, depending on the design and amount of cooling.
 Application Rate: the quantity (mass, volume or thickness) of material applied per unit area.
 Electrical conductivity is the quantity of electricity per unit area transferred through a body at a given voltage gradient.
 Population density is the number of individuals per unit area or volume.
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 The TENSION (synonym: DENSITY) value is the energy per unit area (the surface tension) of the facet; the default is 1.
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 In general, expresses the rate of transfer per unit area of some condition or physical quantity, such as rainfall, electromagnetic energy, sound, etc.
 In the Western world, use of improved genetics, better management of soil nutrients, and improved weed control have greatly increased yields per unit area.
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 STATIC PRESSURE  The normal force per unit area at a small hole in the wall of a duct.
 Static Pressure and Pressure Head in Fluids: The pressure indicates the normal force per unit area at a given point acting on a given plane.
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 Physics. The amount or degree of strength of electricity, light, heat, or sound per unit area or volume.
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 The lower the number, the more light per unit area is delivered to the focal plane.
 Japan has an extremely high density of motor vehicles per unit area in the plains and in other inhabited areas.
 The area of the CA1 region was measured and the number of PVimmunopositive cells per unit area was determined (see Material and methods).
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 Biomass  The quantity of living matter, expressed as a concentration or weight per unit area.
 Pressure is a physical quantity and the measure of uniform stress defined as the force per unit area.
 Edible protein per unit area of land is a measure of agricultural productivity.
 Pressure  (symbol: p) is a measure of force per unit area.
 Similarly, luminous emittance is the luminous flux per unit area emitted from a surface.
 Atmospheric pressure is the total weight of the air above unit area at the point where the pressure is measured.
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 In fluid dynamics, vorticity is the circulation per unit area at a point in the flow field.
 One lumen is defined as the amount of light that falls on a unit area at unit distance from a light source of one candela.
 The component of in the direction of unit vector is the limit of a line integral per unit area of, namely the following integral over the closed curve.
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 The quantity of water applied per unit area is best kept constant.
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 Sperry calls that "remarkable." And water flow actually was better in conifers than in flowering trees in terms of resistance to flow per unit area of wood.
 The rate of electromagnetic energy flow per unit area, the Poynting vector, is defined and discussed in all books of electromagnetism.
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 It measures the flux density we receive, not from the object as a whole, but from each unit area of the sky (technically, solid angle).
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 Flux density, the flux measured per unit area, is also often referred to as "flux".
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 Surface Pressure  This is the atmospheric pressure (the weight of the atmosphere per unit area) at the surface of the planet compared to Earth.
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 Why? Operationally stress takes in a surface normal (which geometrically is a oneform) and returns the force per unit area to the surface.
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 In photometry, illuminance is the total luminous flux incident on a surface, per unit area.
 That means pressure applied by this air on the unit area would be 14.7 pounds per square inch.
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 Pressure Force per unit area, usually expressed in pounds per square inch.
 Luminance is a photometric measure of the luminous intensity per unit area of light travelling in a given direction.
 It states that the intensity per unit area varies in inverse proportion to the square of the distance between the source and surface.
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 Intensity is very often confused with irradiance, which is the flux per unit area.
 Pressure (the symbol: P) is the force per unit area applied in a direction perpendicular to the surface of an object.
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 Pressure (symbol: p) is the force per unit area acting on a surface in a direction perpendicular to that surface.
 Atmospheric pressure is defined as the force per unit area exerted against a surface by the weight of the air above that surface.
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 Force per unit area exerted by the air above the surface of the Earth.
 Air pressure  the force per unit area exerted by the weight of air; at sea level the air pressure is 14.7 psi.
 In my book on Optics the power (rate of radiant energy) per unit area per per unit of solid angle is called the 'Radiance'.
 The Poynting vector gives, in magnitude and direction, the power radiated through unit area at any instant.
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 The power per unit area per unit solid angle is sometimes called sterance.
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 Note 1 ^: The term " intensity " is used exclusively for the measurement of sound in watts per unit area.
 PERMEABILITY: The rate at which water vapor will diffuse through a unit area of material induced by a unit differential in water vapor pressure.
 Population density is a measurement of population per unit area or unit volume.
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 Consequently, microreactors significantly intensify heat transfer, mass transport, and diffusional flux per unit volume or unit area.
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 We have defined the intensity of light and other electromagnetic radiation as power per unit area, measured in watts per square meter.
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 The Intensity is in units of energy per unit area per unit solid angle per unit time per unit wavelength interval.
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 Flux: The amount of radiation crossing a surface per unit of time, often expressed in "integral form" as particles per unit area per unit time.
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 One can calculate the number of atomic or molecular collisions with a wall of a container per unit area per unit time.
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Unit Area
 Irradiance, radiant emittance, and radiant exitance are radiometry terms for the power of electromagnetic radiation at a surface, per unit area.
 Irradiance and Illuminance: Irradiance is a measure of radiometric flux per unit area, or flux density.
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 Water pressure  force per unit area exerted by the weight of water, each 33 feet of sea water exerts a pressure equivalent to one atmosphere, or 14.7 psi.
Categories
 Unit Time
 Unit Volume
 Watts
 Electromagnetic Energy
 Industry > Manufacturing > Measurement > Force

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