Units of measurement
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Square mile (mi²)
Barn (b)
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Square mile (mi²)
A square mile (mi²) is a large unit of area measurement used to describe large land areas and administrative regions. 1 mi² = 2.59 km².
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.