The prefixes provide an order of magnitude: Ex.
|Name||Symbol||Value in SI Units|
|minute||min||1 min = 60 s|
|hour||h||1 h = 60 min = 3600 s|
|day||d||1 d = 24 h = 86400 s|
|degree||°||1° = (π/180) rad|
|minute||'||1' = (1/60)° = (π/10800) rad|
|second||''||1'' = (1/60)' = (π/648000) rad|
|liter||l, L||1 L = 1 dm 3 = 10 -3 m 3|
|metric ton||t||1 t = 10 3 kg|
|neper||Np||1 Np = 1|
|bel||B||1 B = (1/2) ln 10 Np|
|nautical mile||1 nautical mile = 1852 m|
|knot||knot||1 knot = 1 nautical mile per hour = (1852/3600) m/s|
|are||a||1 a = 1 dam 2 = 10 2 m 2|
|hectare||ha||1 ha = 1 hm 2 = 10 4 m 2|
|bar||bar||1 bar = 0.1 MPa = 100 kPa = 10 5 Pa|
|ångström||Å||1 Å = 0.1 nm = 10 -10 m|
|barn||b||1 b = 100 fm 2 = 10 -28 m 2|
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