A centimetre (American spelling American English is a set of dialects of the English language used mostly in the United States. Approximately two thirds of native speakers of English live in the United States: centimeter, symbol cm) is a unit A unit of measurement is a definite magnitude of a physical quantity, defined and adopted by convention and/or by law, that is used as a standard for measurement of the same physical quantity. Any other value of the physical quantity can be expressed as a simple multiple of the unit of measurement of length In certain contexts, the term "length" is reserved for a certain dimension of an object along which the length is measured. For example it is possible to cut a length of a wire which is shorter than wire thickness. Another example is FET transistors, in which the channel width may be larger than channel length in the metric system The metric system is an international decimalised system of measurement, first adopted by France in 1791, that is the common system of measuring units used by most of the world. It exists in several variations, with different choices of fundamental units, though the choice of base units does not affect its day-to-day use. Over the last two, equal to one hundredth of a metre The metre , symbol m, is the base unit of length in the International System of Units (SI). Originally intended to be one ten-millionth of the distance from the Earth's equator to the North Pole, its definition has been periodically refined to reflect growing knowledge of metrology. Since 1983, it is defined as the distance travelled by light in a, which is the current SI The International System of Units is the modern form of the metric system and is generally a system of units of measurement devised around seven base units and the convenience of the number ten. It is the world's most widely used system of measurement, both in everyday commerce and in science base unit The International System of Units defines seven units of measure as a basic set from which all other SI units are derived. These SI base units and their physical quantities are: of length. Centi is the SI prefix The International System of Units specifies a set of unit prefixes known as SI prefixes or metric prefixes. An SI prefix is a name that precedes a basic unit of measure to indicate a decimal multiple or fraction of the unit. Each prefix has a unique symbol that is prepended to the unit symbol. The SI prefixes are standardized by the International for a factor of 10−2.[1] Hence a centimetre can be written as 10 × 10−3 m (engineering notation Engineering notation is a version of scientific notation in which the powers of ten must be a multiple of three . As an alternative to writing powers of 10, SI prefixes can be used, which also usually provide steps of a factor of a thousand) or 1E−2 m (scientific E notation Scientific notation, also known as standard form or as exponential notation, is a way of writing numbers that accommodates values too large or small to be conveniently written in standard decimal notation. Scientific notation has a number of useful properties and is often favored by scientists, mathematicians and engineers, who work with such) — meaning 10 × 101 mm The millimetre is a unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length or 1 m/100 respectively. The centimetre is the base unit of length in the now deprecated centimetre-gram-second The centimetre-gram-second system is a metric system of physical units based on centimetre as the unit of length, gram as a unit of mass, and second as a unit of time. All CGS mechanical units are unambiguously derived from these three base units, but there are several different ways of extending the CGS system to cover electromagnetism (CGS) system of units.
Though for many physical quantities, SI prefixes The International System of Units specifies a set of unit prefixes known as SI prefixes or metric prefixes. An SI prefix is a name that precedes a basic unit of measure to indicate a decimal multiple or fraction of the unit. Each prefix has a unique symbol that is prepended to the unit symbol. The SI prefixes are standardized by the International for factors of 103—like milli- and kilo-—are often preferred by technicians, the centimetre remains a practical unit of length for many everyday measurements. A centimetre is approximately the width of the fingernail of an adult person (between 3/8" and 7/16" on an English inch ruler).
1 centimetre
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Equivalence to other units of length
A carpenters' ruler with centimetre divisions1 centimetre is equal to:
- 0.01 metre, which can be represented by 1.00 E-2 m (1 metre is equal to 100 centimetres)
- about 0.393700787401575 inch An inch is the name of a unit of length in a number of different systems, including Imperial units, and United States customary units. There are 36 inches in a yard and 12 inches in a foot. A corresponding unit of area is the square inch and a corresponding unit of volume is the cubic inch. The inch is usually the universal unit of measurement in (1 inch is equal to 2.54 centimetres) [2]
1 cubic centimetre is equal to 1 millilitre The litre is a unit of volume. There are two official symbols: the Latin letter L in lower and upper case (l and L). The lower case L is also often written as a cursive ℓ, though this symbol has no official approval by any international bureau. Although the litre is not an SI unit, it is accepted for use with the SI, and has appeared in several, under the current SI The International System of Units is the modern form of the metric system and is generally a system of units of measurement devised around seven base units and the convenience of the number ten. It is the world's most widely used system of measurement, both in everyday commerce and in science system of units.
Uses of centimetre
In addition to its use in the measurement of length In certain contexts, the term "length" is reserved for a certain dimension of an object along which the length is measured. For example it is possible to cut a length of a wire which is shorter than wire thickness. Another example is FET transistors, in which the channel width may be larger than channel length, the centimetre is used:
- sometimes, to report the level of rainfall as measured by a rain gauge A rain gauge is a type of instrument used by meteorologists and hydrologists to gather and measure the amount of liquid precipitation (solid precipitation is measured by a snow gauge) over a set period of time [3]
- in the CGS system, the centimetre is used to measure capacitance In electromagnetism and electronics, capacitance is the ability of a body to hold an electrical charge. Capacitance is also a measure of the amount of electrical energy stored for a given electric potential. A common form of energy storage device is a parallel-plate capacitor. In a parallel plate capacitor, capacitance is directly proportional to, where 1 cm of capacitance = 1.113×10 − 12 Farad The farad is the SI unit of capacitance. The term farad is named after the English physicist Michael Faraday [4]
- in maps, centimetres are used to make conversions from map scale to real world scale (kilometres)
- to represent second moment of areas (cm^4)
Unicode symbols
For the purposes of compatibility with Chinese Chinese or the Sinitic language (汉语／漢語 Hànyǔ; 华语／華語 Huáyǔ; 中文 Zhōngwén) is a language family consisting of languages which are mostly mutually unintelligible to varying degrees. Originally the indigenous languages spoken by the Han Chinese in China, it forms one of the two branches of Sino-Tibetan family of languages, Japanese Japanese (日本語?, [nihoŋɡo] ) is a language spoken by over 130 million people in Japan and in Japanese emigrant communities. It is a member of the Japonic (or Japanese-Ryukyuan) language family. There are a number of proposed relationships with other languages, but none of them has gained unanimous acceptance. Japanese is an agglutinative and Korean Korea (Korean: 한국 "Hanguk" [ˌhanˈkuːk—]-South and North Korea, rsp. ) is a territory of East Asia that was formerly unified under one state, but now divided into two separate states and a region in northeastern Asia. Located on the Korean Peninsula, it is bordered by China to the northwest, Russia to the northeast, and is (CJK CJK is a collective term for Chinese, Japanese, and Korean, which constitute the main East Asian languages. The term is used in the field of software and communications internationalization) characters, Unicode Unicode is a computing industry standard for the consistent representation and handling of text expressed in most of the world's writing systems. Developed in conjunction with the Universal Character Set standard and published in book form as The Unicode Standard, the latest version of Unicode consists of a repertoire of more than 107,000 has symbols for: [5]
- centimetre (㎝) - code 339D
- square centimetre (㎠) - code 33A0
- cubic centimetre (㎤) - code 33A4
They are mostly used only with East Asian fixed-width CJK CJK is a collective term for Chinese, Japanese, and Korean, which constitute the main East Asian languages. The term is used in the field of software and communications internationalization fonts, because they are equal in size to one Chinese character.
See also
- 1 E-2 m
- Conversion of units Conversion of units refers to conversion factors between different units of measurement for the same quantity, for comparison with other units of length
- Reciprocal centimetre
- Metric system The metric system is an international decimalised system of measurement, first adopted by France in 1791, that is the common system of measuring units used by most of the world. It exists in several variations, with different choices of fundamental units, though the choice of base units does not affect its day-to-day use. Over the last two
- Orders of magnitude (length) To help compare different orders of magnitude, the following list describes various lengths between 1.6 × 10−35 m and 1.3 × 1026 m
- SI The International System of Units is the modern form of the metric system and is generally a system of units of measurement devised around seven base units and the convenience of the number ten. It is the world's most widely used system of measurement, both in everyday commerce and in science
- SI prefix The International System of Units specifies a set of unit prefixes known as SI prefixes or metric prefixes. An SI prefix is a name that precedes a basic unit of measure to indicate a decimal multiple or fraction of the unit. Each prefix has a unique symbol that is prepended to the unit symbol. The SI prefixes are standardized by the International
References
- ^ BIPM - SI prefixes
- ^ Inch - from Eric Weisstein's World of Physics
- ^ Rain Measurement, Rain Gauge, Wireless Rain Gauge, Rain Gage, Rain Gauge Data
- ^ Capacitance - from Eric Weisstein's World of Physics
- ^ [1] CJK Compatibility excerpt from The Unicode Standard, Version 4.1.
- CJK Compatibility excerpt from The Unicode Standard, Version 4.4 and co-exterior users.
Categories: Units of length | Orders of magnitude (length) | Centimetre gram second system of units | SI derived units
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