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Area
Area is a physical quantity expressing the size of a part of a surface. Surface area is the summation of the areas of the exposed sides of an object.
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Convert from barn
to barn
The Barn is a slightly humorous unit of area used in nuclear physics. When atoms are bombarded with smaller particles such as electrons, the electrons are scattered as if the nucleus of the atom was a tiny solid object. The barn is used to express the apparent cross-sectional area of this scattering object. One barn is equal to 1E-28 square meters. Using this unit, physicists can say that such and such a nucleus is "as big as a barn", or 10 barns, or whatever. The proper SI unit to use for these measurements is the square femtometer (fm
2
); one barn equals 100 fm
2
.
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The Barn is a slightly humorous unit of area used in nuclear physics. When atoms are bombarded with smaller particles such as electrons, the electrons are scattered as if the nucleus of the atom was a tiny solid object. The barn is used to express the apparent cross-sectional area of this scattering object. One barn is equal to 1E-28 square meters. Using this unit, physicists can say that such and such a nucleus is "as big as a barn", or 10 barns, or whatever. The proper SI unit to use for these measurements is the square femtometer (fm
2
); one barn equals 100 fm
2
.
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are (a)
hectare (ha)
square centimeter (cm²)
square kilometer
square meter
square micrometer
square millimeter
square nanometer
acre
homestead
rood
square
square foot (ft²)
square inch (in²)
square mile
square rod
square yard (yr²)
township
square league
square mile
acre (Ireland)
acre (commercial)
acre (survey)
arpent (Canada)
barn
bovate
bunder
caballeria (Central America)
caballeria (Cuba)
caballeria (Spain/Peru)
carreau
carucate
cawney
centiare
cong
cover
cuerda
dekare
dessiatina
dhur
dunum, dunham
fall (English)
fall (Scots)
fanega
farthingdale
hacienda
hide
hundred
jerib
jitro, joch, jutro
kappland
kattha (Nepal)
labor
legua
manzana (Argentina)
manzana (Costa Rican)
morgen (Germany)
morgen (South Africa)
mu
ngarn
nook
oxgang
perch
perche (Canada)
ping
pyong
rai
section
shed
sitio
square Paris foot
square angstrom
square astronomical unit
square attometer
square bicron
square chain (Gunter, survey)
square chain (Ramden, Engineer)
square cubit
square decimeter
square dekameter
square exameter
square fathom
square femtometer
square fermi
square foot (survey)
square furlong
square gigameter
square hectometer
square inch (survey)
square league (U.S. statute)
square light year
square link (Gunter, survey)
square link (Ramden, Engineer)
square megameter
square microinch
square micromicron
square micron
square mil
square mile (survey, U.S. statute)
square millimicron
square myriameter
square parsec
square perch
square perche
square petameter
square picometer
square tenthmeter
square terameter
square thou
square vara (California)
square vara (Texas)
square yard (survey)
square yoctometer
square yottameter
stang
stremma
tarea
tatami
tonde land
tunnland
virgate
tsubo
are (a)
hectare (ha)
square centimeter (cm²)
square kilometer
square meter
square micrometer
square millimeter
square nanometer
acre
homestead
rood
square
square foot (ft²)
square inch (in²)
square mile
square rod
square yard (yr²)
township
square league
square mile
acre (Ireland)
acre (commercial)
acre (survey)
arpent (Canada)
barn
bovate
bunder
caballeria (Central America)
caballeria (Cuba)
caballeria (Spain/Peru)
carreau
carucate
cawney
centiare
cong
cover
cuerda
dekare
dessiatina
dhur
dunum, dunham
fall (English)
fall (Scots)
fanega
farthingdale
hacienda
hide
hundred
jerib
jitro, joch, jutro
kappland
kattha (Nepal)
labor
legua
manzana (Argentina)
manzana (Costa Rican)
morgen (Germany)
morgen (South Africa)
mu
ngarn
nook
oxgang
perch
perche (Canada)
ping
pyong
rai
section
shed
sitio
square Paris foot
square angstrom
square astronomical unit
square attometer
square bicron
square chain (Gunter, survey)
square chain (Ramden, Engineer)
square cubit
square decimeter
square dekameter
square exameter
square fathom
square femtometer
square fermi
square foot (survey)
square furlong
square gigameter
square hectometer
square inch (survey)
square league (U.S. statute)
square light year
square link (Gunter, survey)
square link (Ramden, Engineer)
square megameter
square microinch
square micromicron
square micron
square mil
square mile (survey, U.S. statute)
square millimicron
square myriameter
square parsec
square perch
square perche
square petameter
square picometer
square tenthmeter
square terameter
square thou
square vara (California)
square vara (Texas)
square yard (survey)
square yoctometer
square yottameter
stang
stremma
tarea
tatami
tonde land
tunnland
virgate
tsubo
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