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Power per area
In physics and engineering, surface power density is power per unit area. The intensity of electromagnetic radiation can be expressed in W/m2. An example
Surface_power_density
Mass per unit area
The area density (also known as areal density, surface density, superficial density, column density, or density thickness) of a two-dimensional object
Area_density
Electric charge per unit length, area or volume
electromagnetism, charge density is the amount of electric charge per unit length, surface area, or volume. Volume charge density (symbolized by the Greek
Charge_density
Power transferred per unit area
is moving. The resulting vector has the units of power divided by area (i.e., surface power density). The intensity of a wave is proportional to the square
Intensity_(physics)
Amount of charge flowing through a unit cross-sectional area per unit time
In SI base units, the electric current density is measured in amperes per meter square. Consider a small surface with area A (SI unit: m2) centered at
Current_density
Renewable energy made from biomass
surface power production densities of a crop will determine how much land is required for production. The average lifecycle surface power densities for
Bioenergy
Measurement of electromagnetic radiation
Solar irradiance is the power per unit area (surface power density) received from the Sun in the form of electromagnetic radiation in the wavelength range
Solar_irradiance
Conversion of energy from sunlight into electricity
power in the manufacturing and transportation of solar devices would further reduce carbon emissions. Lifecycle surface power density of solar power varies
Solar_power
Electrical power generation from wind
coal power. Onshore (on-land) wind farms can have a significant visual impact and impact on the landscape. Due to a very low surface power density and
Wind_power
Comparison of costs of different electricity generation sources
between high- and low-density sources. Surface power density is a significant limiting factor in countries with high population density. Impacts on wildlife
Cost_of_electricity_by_source
coal power. Onshore (on-land) wind farms can have a significant visual impact and impact on the landscape. Due to a very low surface power density and
Environmental impact of wind power
Environmental_impact_of_wind_power
Use of electrons to join metal parts via melting
a small diameter. This allows for a high power density on the surface to be welded. Values of power density in the crossover (focus) of the beam can be
Electron-beam_welding
International nuclear fusion research and engineering megaproject
hydroelectric power all have very low surface power density compared to ITER's successor DEMO which, at 2,000 MW, would have an energy density that exceeds
ITER
Measure of directional electromagnetic energy flux
Poynting vector S, at a point, gives the magnitude and direction of surface power density that are due to electromagnetic fields at that point. More rigorously
Poynting_vector
Mass per unit volume
Density (volumetric mass density or specific mass) is the ratio of a substance's mass to its volume. The symbol most often used for density is ρ (the
Density
Energy per volume
increase energy density and decrease charging time, such as supercapacitors. No single energy storage method boasts the best in specific power, specific energy
Energy_density
Controversy over the use of nuclear power
source. In terms of life-cycle surface power density (land surface area used per power output), nuclear power has median density of 240 W/m2, which is 34 times
Nuclear_power_debate
power in the manufacturing and transportation of solar devices would further reduce carbon emissions. Lifecycle surface power density of solar power varies
Environmental impact of electricity generation
Environmental_impact_of_electricity_generation
Mathematical concept applicable to physics
electromagnetism definition, the corresponding flux density, if that term is used, refers to its derivative along the surface that was integrated. By the Fundamental
Flux
Transport of energy by wind waves, and the capture of that energy to do useful work
began in 1890 or earlier, mainly due to its high power density. Just below the ocean's water surface the wave energy flow, in time-average, is typically
Wave_power
Impact of human life on Earth and environment
coal power. Onshore (on-land) wind farms can have a significant visual impact and impact on the landscape. Due to a very low surface power density and
Human impact on the environment
Human_impact_on_the_environment
Process in metallurgy
predominantly in the surface layer, the depth of this layer being dictated by the frequency of the alternating field, the surface power density, the permeability
Induction_hardening
Rate at which sound energy is reflected or transmitted per unit time
the surface, integrated over that surface." The SI unit of sound power is the watt (W). It relates to the power of the sound force on a surface enclosing
Sound_power
Computer storage measure
density: length (linear density) of track, area of the surface (areal density), or in a given volume (volumetric density). Generally, higher density is
Density_(computer_storage)
Group of wind turbines
coal power. Onshore (on-land) wind farms can have a significant visual impact and impact on the landscape. Due to a very low surface power density and
Wind_farm
Vector field describing the density of electric dipole moments in a dielectric material
electromagnetism, polarization density (or electric polarization, or simply polarization) is the vector field that expresses the volumetric density of permanent or induced
Polarization_density
Amount of power radiated through a given area
flux, also known as radiative flux density or radiation flux (or sometimes power flux density), is the amount of power radiated through a given area, in
Radiative_flux
Relationship of wind speeds at varying heights
author-published. ISBN 0-9644588-0-2. Classes of wind power density at 10 m and 50 m Comparison of annual average wind power at three sites with identical wind speeds
Wind_profile_power_law
Laptop by Microsoft
resolution. Both models have a 3:2 aspect ratio and pixel density of 201 pixels per inch (ppi). The Surface Laptop 3 13.5-inch model starts at $1,000 and goes
Surface_Laptop_3
2-in-1 detachable in the Microsoft Surface series
display with a density of 217 PPI and a full 180 degree viewing angle. The Surface Go starts at US$399 and does not include a Type Cover or Surface Pen, which
Surface_Go
Due to a very low surface power density and spacing requirements, wind farms typically need to be spread over more land than other power stations. They also
Renewable_energy_debate
French photovoltaic power station
a comparable power station with south-facing modules, due to less space required between rows . The park's average surface power density is approximately
Cestas_Solar_Park
HighPower LED
based on magnetron sputter deposition. HIPIMS utilises extremely high power densities of the order of kW⋅cm−2 in short pulses (impulses) of tens of microseconds
High-power impulse magnetron sputtering
High-power_impulse_magnetron_sputtering
Astronomical trend of star formation
between the surface density of gas and the rate at which stars are formed within that cloud. SFR surface density scales as some positive power n {\displaystyle
Kennicutt–Schmidt_law
Physical law on the emissive power of black body
energy radiated per unit surface area per unit time (also known as the radiant exitance) is directly proportional to the fourth power of the black body's temperature
Stefan–Boltzmann_law
Tendency of AC current flow in a conductor's outer layer
become distributed within a conductor such that the current density is largest near the surface of the conductor and decreases exponentially with greater
Skin_effect
Topics referred to by the same term
density or surface density, mass over an area Bulk density, mass of a particulate solid or powder divided by the volume it occupies Linear density, mass over
Density_(disambiguation)
Physical quantity in electromagnetism
current density is the rate of change of the electric displacement field D, appearing as ∂D/∂t in Maxwell's equations. Displacement current density has the
Displacement_current_density
Power spectrum of a noise signal
engineering. The spectral power density, compared with white noise, decreases by 3.01 dB per octave (10 dB per decade); density proportional to 1/f. For
Colors_of_noise
Trace radiation from the early universe
strongest in the microwave region of the electromagnetic spectrum. Its energy density exceeds that of all the photons emitted by all the stars in the history
Cosmic_microwave_background
Star at the centre of the Solar System
Instead, the density of the plasma is low enough to allow convective currents to develop and move the Sun's energy outward towards its surface. Material
Sun
Flow of electric charge
materials such as metals, and under low frequencies, the current density across the conductor surface is uniform. In such conditions, Ohm's law states that the
Electric_current
Force distributed over an area
pressure is called the force density. Another example is a knife. If the flat edge is used, force is distributed over a larger surface area resulting in less
Pressure
State of matter
fluids. Table 2 shows density, diffusivity and viscosity for typical liquids, gases and supercritical fluids. Also, there is no surface tension in a supercritical
Supercritical_fluid
Strength of an object's radar echo
the transmitted power density at the target such that if the total intercepted power were re-radiated isotropically, the power density actually observed
Radar_cross_section
Ratio of two densities
Relative density, also called specific gravity, is a dimensionless quantity defined as the ratio of the density (mass divided by volume) of a substance
Relative_density
Electrochemical process for coating with metal
is provided by an external power supply. Electroplating is widely used in industry and decorative arts to improve the surface qualities of objects—such
Electroplating
Series of personal computers, tablets and interactive whiteboards by Microsoft
models (Surface RT and Surface 2) ran on ARM32, and a select handful of models starting with the Surface Pro X in 2019 run on ARM64. The Surface line has
Microsoft_Surface
Directional mass flow of oceanic water
currents are driven by differences in water density due to variations in water temperature and salinity. Surface oceanic currents are driven by wind currents
Ocean_current
Electricity generation by nuclear fusion
plasma entered a density-free regime where higher density did not increase instability. Claims of commercially viable fusion power being relatively imminent
Fusion_power
plasmon Surface plasmon polaritons Surface plasmon resonance Surface power density Surface reconstruction Surface science Surface selection rule Surface states
Index_of_physics_articles_(S)
coal power. Onshore (on-land) wind farms can have a significant visual impact and impact on the landscape. Due to a very low surface power density and
Wind energy policy of the United States
Wind_energy_policy_of_the_United_States
Vehicle propelled fully or mostly by electricity
LIBs). Lithium-ion batteries have a higher energy density, longer life span, and higher power density than most other practical batteries. Complicating
Electric_vehicle
Electromagnetic energy transfer rate
flux density is the quantity that describes the rate at which energy is transferred by electromagnetic radiation through a real or virtual surface, per
Spectral_flux_density
Board to support and connect electronic components
PCBs provide much higher component density, because circuit traces on the inner layers would otherwise take up surface space between components. The rise
Printed_circuit_board
Physical phenomenon
interface between two fluids with different densities. Elastic surface waves can travel along the surface of solids, such as Rayleigh or Love waves. Electromagnetic
Surface_wave
Concept of collecting solar power in outer space and distributing it to Earth
atmosphere to receivers on the Earth's surface. In the 1970s, groups like the L5 Society promoted space-based solar power for civilian energy. They soon recognized
Space-based_solar_power
Device in optics that reduces light intensity
In photography and optics, a neutral-density filter, or ND filter, is a filter that reduces or modifies the intensity of all wavelengths, or colors, of
Neutral-density_filter
Electronics module
Compared to discrete power semiconductors in plastic housings as TO-247 or TO-220, power packages provide a higher power density and are in many cases
Power_module
Sustainable energy from sea and river water
Leonardo D.; Lienhard, John H. (2018). "Economic framework for net power density and levelized cost of electricity in pressure-retarded osmosis". Desalination
Osmotic_power
Thermodynamic cycle
Atkinson cycle is designed to provide efficiency at the expense of power density. A variation of this approach is used in some modern automobile engines
Atkinson_cycle
Quotient of a quantity by mass
Specific surface area, per unit of mass, volume, or cross-sectional area Specific volume, volume per unit mass, i.e. the reciprocal of density Mass ratio
Specific_quantity
Device that converts electricity into heat
characterizing the power density of the element. Power density is defined as the output power, P, from a heating element divided by the heated surface area, A,
Heating_element
Innermost Galilean moon of Jupiter
fourth-largest natural satellite in the Solar System, has the highest density and strongest surface gravity of any natural satellite, and the lowest amount of water
Io_(moon)
Field of geometry closely arranging circles on a plane
given surface such that no overlapping occurs and so that no circle can be enlarged without creating an overlap. The associated packing density, η, of
Circle_packing
Method for producing electronic circuits
often used for components not suitable for surface mounting such as large transformers and heat-sinked power semiconductors. An SMT component is usually
Surface-mount_technology
Equations describing classical electromagnetism
_{\Sigma }} is a surface integral over the surface Σ, The total electric charge Q enclosed in Ω is the volume integral over Ω of the charge density ρ (see the
Maxwell's_equations
Body of salt water covering most of Earth
floats on the ocean's surface (as does fresh water ice, which has an even lower density). Sea ice covers about 7% of the Earth's surface and about 12% of the
Ocean
density substrates that eliminate the need for direct connection of power devices to heat sinks. One of the main advantages of the DBC vs other power
Power_electronic_substrate
Second-largest moon of Jupiter
a density of about 1.83 g/cm3, the lowest density and surface gravity of Jupiter's major moons. Compounds detected spectroscopically on the surface include
Callisto_(moon)
Collapsed core of a massive star
periods from about 1.4 ms to 30 s. The neutron star's density also gives it very high surface gravity, with typical values ranging from 1012 to 1013 m/s2
Neutron_star
describe the surface brightness (i.e. projected density) profile of galaxies, except that the Einasto model describes a spherically symmetric density distribution
Einasto_profile
State of matter
exist, ionization is necessary. The term "plasma density" by itself usually refers to the electron density n e {\displaystyle n_{e}} , that is, the number
Plasma_(physics)
Gas layer surrounding Earth
600 kilometres (31 to 373 mi) above Earth's surface, is the ionosphere – a region of enhanced plasma density. The temperature of the thermosphere gradually
Atmosphere_of_Earth
MOSFET that can handle significant power levels
It was a breakthrough in power electronics. Generations of MOSFETs enabled power designers to achieve performance and density levels not possible with
Power_MOSFET
Large body of salt water
driven by changes in the temperature and density of the water, before eventually welling up again towards the surface. Deep seawater has a temperature between
Sea
rate performance is correlated to the areal density only by increasing a track's linear surface bit density (sectors per track). Simply increasing the
Hard disk drive performance characteristics
Hard_disk_drive_performance_characteristics
Artificial structures such as pavements covered with water-tight materials
and one-third is building roofs. Impervious surface coverage can be limited by restricting land use density (such as a number of homes per acre in a subdivision)
Impervious_surface
Semiconductor device capable of handling large amounts of electricity
Structural changes are often made in a power device in order to accommodate the higher current density, higher power dissipation, and/or higher reverse breakdown
Power_semiconductor_device
System of building very large integrated circuit networks
layer of circuitry on the surface. Multiple copies of these patterns are deposited on the wafer in a grid fashion across the surface of the wafer. After all
Wafer-scale_integration
Surface integral of the magnetic field
the magnetic field (the magnetic flux density) having the unit of Wb/m2 (tesla), S is the area of the surface, and θ is the angle between the magnetic
Magnetic_flux
Instrument for measuring solar irradiance
measuring solar irradiance on a planar surface and it is designed to measure the solar radiation flux density (W/m2) from the hemisphere above within
Pyranometer
Type of field-effect transistor
practical field-effect transistor enabled by Atalla’s earlier work on silicon surface passivation and thermal oxidation—revolutionized electronics and paved
MOSFET
Property of space that quantifies the magnetic influence at a given location
energy density equation given above. Magnetic field, together with the electric field, transmit electrical power. The amount of electrical power (per unit
Magnetic_field
Process of electroplating copper
efficiency and allow for higher current density and thus faster plating rates, but they usually have less throwing power, although high-throw variations exist
Copper_electroplating
High-capacity electrochemical capacitor
the Specific Surface Area (SSA) accessible by the electrolyte, its interfacial double-layer capacitance, and the electrode material density. Commercial
Supercapacitor
Power supply with electrochemical cells
phones and laptop computers. Cells of this type (in order of increasing power density and cost) include nickel–cadmium (NiCd), nickel–zinc (NiZn), nickel–metal
Electric_battery
Large-scale photovoltaic power complex in Qinghai, China
environment characterized by strong solar irradiation, low population density, and extensive areas of desertified land. The region has traditionally
Talatan_Solar_Park
Thermal electromagnetic radiation
{\displaystyle B_{\nu }(T)\cos \theta } is the radiance density per unit area of emitting surface as the surface area involved in generating the radiance is increased
Black-body_radiation
States of matter for water as a solid
and neatly packed and has a higher density than the liquid phase. When lakes freeze, they do so only at the surface, while the bottom of the lake remains
Phases_of_ice
Software tool to help identify locations for wind power generation
wind power generation virtually anywhere in the world, and perform preliminary calculations. It provides free access to data on wind power density and
Global_Wind_Atlas
Measure of positive and negative charges
within some closed surface, the dipole density p(r) is equal to p inside the surface, but is zero outside. That is, the dipole density includes a Heaviside
Electric_dipole_moment
Relation between surface area and volume as size increases
faster than the surface area. Thus the square–cube law. This principle applies to all solids. When a physical object maintains the same density and is scaled
Square–cube_law
areas range from 6.4 meters per second (m/s) to 10.1 m/s, with wind-power-density values of 300 to 1,250 watts per square meter (W/m2). When considering
Wind_power_in_the_Philippines
Foundational law of electromagnetism relating electric field and charge distributions
)=0} ) Therefore the flux through a closed surface generated by some charge density outside (the surface) is null. Now consider r 0 ∈ Ω {\displaystyle
Gauss's_law
Rubber used as covering on a table tennis racket
on the surface. There are four common types of table tennis rubbers: short pips, long pips, antispin, and inverted. The thickness and density of the sponge
Table_tennis_rubber
Density metering technique
ground surface to measure how effectively the soil's density blocks the penetration of gamma radiation through the soil. As the soil's density increases
Nuclear_densitometry
Water from a sea or an ocean
(Cl−) ions). The average density at the surface is 1.025 kg/L. Seawater is denser than both fresh water and pure water (density 1.0 kg/L at 4 °C (39 °F))
Seawater
Type of rechargeable battery
batteries. Lithium-ion cells can be manufactured to optimize energy density or power density. Handheld electronics mostly use lithium polymer batteries (with
Lithium-ion_battery
Type of lithium iron phosphate battery with elongated cell structure
an 8C peak charge rate, and a Long Blade achieving a cell-level energy density of 190–210 Wh/kg. The battery supports extreme fast charging, capable of
Blade_battery
SURFACE POWER-DENSITY
SURFACE POWER-DENSITY
Surname or Lastname
English (of Norman origin)
English (of Norman origin) : occupational name denoting a servant who carried the ewer to guests at table so that they could wash their hands, Anglo-Norman French and Middle English ewerer (related to ewere ‘jug’), with the French definite article l’.Cornish : variant of Flower 4.
Boy/Male
Tamil
Logenthiran | லோகேநà¯à®¤à¯€à®°à®£
Power
Logenthiran | லோகேநà¯à®¤à¯€à®°à®£
Surname or Lastname
English
English : nickname for a vain or proud man, from Middle English po ‘peacock’. Compare Peacock.Welsh : variant of Pugh.
Surname or Lastname
English
English : topographic name for someone who lived near a tower, usually a defensive fortification or watchtower, from Middle English, Old French tūr (Latin turris).English : occupational name for someone who dressed white leather, cured with alum rather than tanned with bark, from an agent derivative of Middle English taw(en) (Old English tawian ‘to prepare, make ready’).English : Americanized spelling of German Tauer.
Boy/Male
British, English
Surname Related to Paul; Small
Surname or Lastname
English
English : variant of Powell.North German : from a form of the personal name Paul.
Boy/Male
Tamil
Power
Surname or Lastname
Irish (Leinster and Munster) and English (of Norman origin)
Irish (Leinster and Munster) and English (of Norman origin) : habitational name for someone from Pois, a place in Picardy (said to have been named with Old French pois ‘fish’ because of its well-stocked river), from Old French Pohier ‘native of Pois’.English : nickname for a poor man, or ironically for a miser, from Middle English, Old French povre, poure ‘poor’ (Latin pauper). Woulfe gives this also as the meaning of the Norman Irish name, which in early records is found as le Poer, believing it to be a nickname for someone who has taken a vow of poverty.
Surname or Lastname
Scottish
Scottish : occupational name for a bow maker, Older Scots bowar, equivalent to English Bowyer.English and Scottish : from Middle English bur, bour ‘bower’, ‘cottage’, ‘inner room’ (Old English būr), hence a topographic name for someone who lived in a small cottage, an occupational name for a house servant who attended his master in his private quarters (see Bowerman), or a habitational name from any of various places, for example in Essex, named Bower or Bowers from this word.
Boy/Male
British, English, Irish
Form of Reginald; Counsel Power; Surname
Surname or Lastname
English
English : variant of Power.
Surname or Lastname
German
German : habitational name for someone from Posa or Poserna, south of Merseburg, or a variant of Pose (see Posey).English : variant of Peiser.
Boy/Male
Tamil
Power
Surname or Lastname
English (East Anglia, chiefly Norfolk)
English (East Anglia, chiefly Norfolk) : occupational name for someone who mowed pasture lands to provide hay, from an agent derivative of Middle English mow(en) ‘mow’ (Old English mÄwen).Welsh : nickname from mawr ‘big’ (see Moore 6).German (Möwer) : nickname from an agent derivative of Middle High German mÅven ‘to torment, trouble, or burden’.
Boy/Male
Indian
Part of Sun
Boy/Male
Welsh Shakespearean
Pure.
Surname or Lastname
English (Cumbria and Durham)
English (Cumbria and Durham) : variant spelling of Furness.
Surname or Lastname
English (of Norman origin)
English (of Norman origin) : regional name for someone from the district north of Paris known in Old French as Gohiere.English (of Norman origin) : habitational name from any of the various places in northern France called Gouy (from the Gallo-Roman personal name Gaudius + the locative suffix -acum), with the addition of the Anglo-Norman French suffix -er.English : from a Norman personal name, Go(h)ier, cognate with the Old English name mentioned at Gooder.Welsh : from the peninsula in southern Wales, of which the Welsh name is Gŵyr.Probably an Americanized spelling of German Gauer.
Surname or Lastname
English
English : occupational name for a baker, doghere, from an agent derivative of Middle English dogh ‘dough’.Probably an Americanized spelling of German Dauer.
Boy/Male
Australian, Danish, Swedish
Strong Power; Hardy Power
SURFACE POWER-DENSITY
SURFACE POWER-DENSITY
Female
Cornish
, Wenna by the sea.
Girl/Female
American, Australian, Chinese, Danish, French, Hawaiian, Hebrew, Latin, Swedish
Star of the Sea; Beautiful; Mary means Bitter and Belle means Beautiful; Beloved; God is My Oath; Blend of Mary and Belle
Male
Arthurian
, (Sir) half Knight half buffoon.
Boy/Male
Arabic, Muslim
Glorification; Exaltation; Honour
Boy/Male
Australian, Italian, Latin
Lucky; Happy; Fortunate
Boy/Male
Hindu, Indian, Sikh
One who Wins the Love of God
Boy/Male
Hebrew
God is my power.
Girl/Female
Muslim
Merciful, Companionate, To have mercy upon
Boy/Male
Arabic, Indian, Muslim
Fighter; Crusader; Warrior
Boy/Male
Tamil
Kapilashwar | கபிலாஷà¯à®µà®°
One with a white horse
SURFACE POWER-DENSITY
SURFACE POWER-DENSITY
SURFACE POWER-DENSITY
SURFACE POWER-DENSITY
SURFACE POWER-DENSITY
a.
To reduce the degree, intensity, strength, etc., of; as, to lower the temperature of anything; to lower one's vitality; to lower distilled liquors.
n.
The exterior part of anything that has length and breadth; one of the limits that bound a solid, esp. the upper face; superficies; the outside; as, the surface of the earth; the surface of a diamond; the surface of the body.
imp. & p. p.
of Surface
n.
Capacity of undergoing or suffering; fitness to be acted upon; susceptibility; -- called also passive power; as, great power of endurance.
n.
A mechanical agent; that from which useful mechanical energy is derived; as, water power; steam power; hand power, etc.
v. t.
To sprinkle with powder, or as with powder; to be sprinkle; as, to powder the hair.
n.
A magnitude that has length and breadth without thickness; superficies; as, a plane surface; a spherical surface.
n.
Hence, vested authority to act in a given case; as, the business was referred to a committee with power.
n.
A large quantity; a great number; as, a power o/ good things.
n.
Applied force; force producing motion or pressure; as, the power applied at one and of a lever to lift a weight at the other end.
n.
Mental or moral ability to act; one of the faculties which are possessed by the mind or soul; as, the power of thinking, reasoning, judging, willing, fearing, hoping, etc.
v. i.
To be reduced to powder; to become like powder; as, some salts powder easily.
n.
A form of machine for dressing the surface of wood, metal, stone, etc.
n.
The product arising from the multiplication of a number into itself; as, a square is the second power, and a cube is third power, of a number.
v. t.
To work over the surface or soil of, as ground, in hunting for gold.
n.
Ability, regarded as put forth or exerted; strength, force, or energy in action; as, the power of steam in moving an engine; the power of truth, or of argument, in producing conviction; the power of enthusiasm.
n.
Ability to act, regarded as latent or inherent; the faculty of doing or performing something; capacity for action or performance; capability of producing an effect, whether physical or moral: potency; might; as, a man of great power; the power of capillary attraction; money gives power.
v. t.
To give a surface to; especially, to cause to have a smooth or plain surface; to make smooth or plain.
n.
A machine acted upon by an animal, and serving as a motor to drive other machinery; as, a dog power.