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Conversions between units in the metric system are defined by their prefixes (for example, 1 kilogram = 1000 grams, 1 milligram = 0.001 grams) and are thus not listed in this article. Exceptions are made if the unit is commonly known by another name (for example, 1 micron = 10 −6 metre).
The hectare (ha) is a unit of area equal to 10 000 m 2 (0.01 km 2). Volume ... The bar is a unit of mass equal to one megagram (1 Mg). Linear mass density
For example, milligram (mg) is used instead of microkilogram (μkg). During mathematical operations, prefixes are treated as multiplicative factors. For example, 5 km is treated as 5000 m, which allows all quantities based on the same unit to be factored together even if they have different prefixes.
The kilometre (SI symbol: km) is a unit of length in the metric system equal to 1 000 meters (10 3 m). To help compare different orders of magnitude , this section lists lengths between 1 kilometer and 10 kilometers (10 3 and 10 4 meters ).
The sulfate concentration in March was 10 milligrams per liter (0.0100 oz/cu ft) near Trevorton and 99 milligrams per liter (0.099 oz/cu ft) further downstream, while it was 8 milligrams per liter (0.0080 oz/cu ft) near Trevorton in August and 264 milligrams per liter (0.264 oz/cu ft) 4.6 miles (7.4 km) further downstream.
An overview of ranges of mass. To help compare different orders of magnitude, the following lists describe various mass levels between 10 −67 kg and 10 52 kg. The least massive thing listed here is a graviton, and the most massive thing is the observable universe.
1 Nm 3 of any gas (measured at 0 °C and 1 atmosphere of absolute pressure) equals 37.326 scf of that gas (measured at 60 °F and 1 atmosphere of absolute pressure). 1 kmol of any ideal gas equals 22.414 Nm 3 of that gas at 0 °C and 1 atmosphere of absolute pressure ... and 1 lbmol of any ideal gas equals 379.482 scf of that gas at 60 °F and ...
The concentration of acidity was 0 milligrams per liter and the alkalinity ... the river's average gradient is 45.4 feet per mile (8.60 m/km). For the next 15 miles ...