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Prefix Symbol Factor Power tera T 1 000 000 000 000: 10 12: giga G 1 000 000 000: 10 9: mega M 1 000 000: 10 6: kilo k 1 000: 10 3: hecto h 100 10 2: deca da 10 10 1 (none) (none) 1 10 0: deci d 0.1 10 −1 ...
List of orders of magnitude for specific heat capacity; SI prefix Factor Value J·kg −1 ·K −1 Item Deca-10 1: 94 Radon: Hecto-10 2: 120 Uranium: 129 Gold: 130 Iridium: Osmium: 139 Mercury: 145 Iodine: 158 Xenon: 240 Caesium: 246 Ethanol: 248 Krypton: 363 Rubidium: 377.48 Brass: 385 Copper: 420 Cobalt: 444 Iron: 480 Bromine: Chlorine: 502 ...
The tenth power of 2 (2 10) has the value 1024, which is close to 1000. This has prompted the use of the metric prefixes kilo, mega, and giga to also denote the powers of 1024 which is common in information technology with the unit of digital information, the byte. Units of information are not covered in the International System of Units.
The SI symbols for kilometre, kilogram, and kilowatt, for instance, are km, kg, and kW, respectively. (The symbol for kilo- is k.) Except for the early prefixes of kilo-, hecto-, and deca-, the symbols for the prefixes for multiples are uppercase letters, and those for the prefixes for submultiples are lowercase letters. [8]
The kilogram is the only standard unit to include an SI prefix (kilo-) as part of its name. The gram (10 −3 kg) is an SI derived unit of mass. However, the names of all SI mass units are based on gram , rather than on kilogram ; thus 10 3 kg is a megagram (10 6 g), not a * kilokilogram .
astro: cosmic microwave background radiation per square meter 10 −5: 5 × 10 −5: −13 dBm biomed: sound power incident on a human eardrum at the threshold intensity for pain (500 mW/m 2). 10 −3: milli-(mW) 1.55 × 10 −3: −4.7 dBm astro: power per square meter received from the Sun by Sedna at its aphelion 5 × 10 −3: 7 dBm tech ...
The prefix kilo, for example, implies a factor of 1000 (10 3), and the prefix milli implies a factor of 1/1000 (10 −3). Thus, a kilometre is a thousand metres, and a milligram is one thousandth of a gram.
Metric units are units based on the metre, gram or second and decimal (power of ten) multiples or sub-multiples of these. According to Schadow and McDonald, [1] metric units, in general, are those units "defined 'in the spirit' of the metric system, that emerged in late 18th century France and was rapidly adopted by scientists and engineers.