Units of measurement
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Square foot (ft²)
Barn (b)
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Square foot (ft²)
A square foot (ft²) is a unit of area measurement widely used in construction and real estate, equal to 0.092903 m².
Barn (b)
A barn (b) is a unit of area measurement used in nuclear physics to describe atomic nucleus cross-sections. 1 barn = 10⁻²⁸ m².