Units of measurement
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Calculations
Barn (b)
Hectare (ha)
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Information
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.
Hectare (ha)
A hectare (ha) is widely used in agriculture and land registry, equal to 10,000 m² (100×100 m).