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Hecto (symbol: h) is a decimal unit prefix in the metric system denoting a factor of one hundred. It was adopted as a multiplier in 1795, and comes from the Greek ἑκατόν hekatón , meaning "hundred".
So, for instance, while 'ms' means millisecond, 'm s' or 'm·s' means metre-second. Prefixes corresponding to an integer power of one thousand are generally preferred; the prefixes corresponding to tens (deci-, deca-) and hundreds (centi-, hecto-) are less common and are disfavoured in certain fields.
Systematic names and words comprising SI prefixes and binary prefixes are not hyphenated, by definition. Nonetheless, for clarity, dictionaries list numerical prefixes in hyphenated form, to distinguish the prefixes from words with the same spellings (such as duo-and duo). Several technical numerical prefixes are not derived from words for numbers.
They were changed because of previously proposed ascending hepto (Greek "hepta" (7)) was already in use as a numerical prefix (implying seven) and the letter "h" as both SI-accepted non-SI unit (hour) and prefix (hecto 10 2), the same applied to "s" from previously proposed descending septo (i.e. SI unit "s", seconds), while "o" for octo was ...
The word comes from a combination of "metre" and the SI prefix "hecto-", meaning "hundred". [3] It is not commonly used in English. [citation needed] A football field (either soccer or American) is approximately 1 hectometre in length. [4] [5] The hectare (ha), a common metric unit for land area, is equal to one square hectometre (hm 2).
hecto h 10 2: 100 deca da 10 1: 10 (none) (none) 1 deci d 10 −1: 0.1 centi c 10 −2: 0.01 milli m 10 −3: 0.001 micro μ 10 −6: 0.000 001: nano n 10 −9: 0.000 000 001: pico p 10 −12: 0.000 000 000 001: femto f 10 −15: 0.000 000 000 000 001: atto a 10 −18: 0.000 000 000 000 000 001: zepto: z 10 −21: 0.000 000 000 000 000 000 001 ...
The pascal (symbol: Pa) is the unit of pressure in the International System of Units (SI).It is also used to quantify internal pressure, stress, Young's modulus, and ultimate tensile strength.
hecto kilo mega giga tera peta exa zetta yotta ronna quetta; Prefix symbol da h k M G T P E Z Y R Q Factor 10 0: 10 1: 10 2: 10 3: 10 6: 10 9: 10 12: 10 15: 10 18: 10 ...