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The micrometre (SI symbol: μm) is a unit of length in the metric system equal to 10 −6 metres ( 1 / 1 000 000 m = 0. 000 001 m). To help compare different orders of magnitude , this section lists some items with lengths between 10 −6 and 10 −5 m (between 1 and 10 micrometers , or μm).
1 km 2 means one square kilometre, or the area of a square of 1000 m by 1000 m. In other words, an area of 1 000 000 square metres and not 1000 square metres. 2 Mm 3 means two cubic megametres, or the volume of two cubes of 1 000 000 m by 1 000 000 m by 1 000 000 m, i.e. 2 × 10 18 m 3, and not 2 000 000 cubic metres (2 × 10 6 m 3).
A barn (symbol: b) is a metric unit of area equal to 10 −28 m 2 (100 fm 2).This is equivalent to a square that is 10 −14 m (10 fm) each side, or a circle of diameter approximately 1.128 × 10 −14 m (11.28 fm).
The nanometre (international spelling as used by the International Bureau of Weights and Measures; SI symbol: nm), or nanometer (American spelling), is a unit of length in the International System of Units (SI), equal to one billionth (short scale) or one thousand million (long scale) of a meter (0.000000001 m) and to 1000 picometres.
The micrometre (Commonwealth English as used by the International Bureau of Weights and Measures; [1] SI symbol: μm) or micrometer (American English), also commonly known by the non-SI term micron, [2] is a unit of length in the International System of Units (SI) equalling 1 × 10 −6 metre (SI standard prefix "micro-" = 10 −6); that is, one millionth of a metre (or one thousandth of a ...
The unit prefixes are always considered to be part of the unit, so that, e.g., in exponentiation, 1 km 2 means one square kilometre, not one thousand square metres, and 1 cm 3 means one cubic centimetre, not one hundredth of a cubic metre. In general, prefixes are used with any metric unit, but may also be used with non-metric units.
Nano (symbol n) is a unit prefix meaning one billionth. Used primarily with the metric system , this prefix denotes a factor of 10 −9 or 0.000 000 001 . It is frequently encountered in science and electronics for prefixing units of time and length .
= 0.453 069 545 472 m 3: cubic fathom: cu fm ≡ 1 fm × 1 fm × 1 fm = 6.116 438 863 872 m 3: cubic foot: ft 3: ≡ 1 ft × 1 ft × 1 ft ≡ 0.028 316 846 592 m 3: cubic inch: in 3: ≡ 1 in × 1 in × 1 in ≡ 16.387 064 × 10 −6 m 3: cubic metre (SI unit) m 3: ≡ 1 m × 1 m × 1 m ≡ 1 m 3: cubic mile: cu mi ≡ 1 mi × 1 mi × 1 mi ≡ ...