Metric system

2009-07-26T12:53:13Z

DanBishop: The liter was redefined back to 1 dm³ in 1964.

The [[metric system]] is a system of measurement developed during the [[French Revolution's]] anti-religious [[The Cult of Reason|Cult of Reason]]<ref>However, according to researcher Pat Norton, the system was described a century earlier by Englishman John Wilkins. [http://abc.net.au/news/stories/2007/07/15/1978802.htm Australian Broadcasting Corporation], 15 July 2007 (retrieved 15 July 2007.)</ref> and based on permanent natural standards rather than on royal decrees. [[Joseph Lagrange]] headed the Revolutionary weights-and-measures committee that developed it and set its initial definitions.

Traditional systems of measurement all used standard lengths of parts of the human body, or standard distances that a human might walk. The metric system, by contrast, initially used the [[earth]] itself as the ultimate standard.

In 1878 the [[United States]] signed the treaty called the ''Convention du Mètre.'' Since then, ''both'' the metric system and the [[United States customary units]] (miles, inches, pounds, etc.) have had legal status in the US. US Customary units are in fact defined by reference to metric units; that is, legally, an inch is ''defined'' to be exactly 25.4 millimeters.

In international scientific usage, the ''Convention du Mètre'' is superseded by the conventions of the [[International System of Units]]. However, many of the conventions of the metric system survive, including definitions of units that are not, strictly speaking, SI.

== Definitions ==
All measurement systems must start with one basic unit. For the metric system, this unit is the ''meter''. Every other named unit of the metric system had a definition that depended upon it.

=== Prefixes ===
All base units of the metric system have ''prefixes'' that multiply, or divide, the unit by various factors of ten (or alternatively, a thousand). They are:<ref>Wile, Dr. Jay L. ''Exploring Creation With Chemistry''. Apologia Educational Ministries, Inc. 1998</ref><ref>[http://lamar.colostate.edu/~hillger/common.html Common metric prefixes]</ref>

{| class="wikitable"
|-
! The prefix:
! Abbreviated:
! Multiplies the unit by:
|-
| atto-
| a
| 10-18
|-
| femto-
| f
| 10-15
|-
| pico-
| p
| 10-12
|-
| nano-
| n
| 10-9
|-
| micro- ([[Greek]] ''small'')
| μ
| 10-6
|-
| milli- ([[Latin]] ''one thousand'')
| m
| 10-3
|-
| centi- (Latin ''one hundred'')
| c
| 10-2
|-
| deci- (Latin ''ten'')
| d
| 10-1
|-
| deka- (Greek ''ten'')
| da
| 101
|-
| hecto- (Greek ''one hundred'')
| H
| 102
|-
| kilo- (Greek ''one thousand'')
| k
| 103
|-
| mega- (Greek ''large'')
| M
| 106
|-
| giga- (Latin ''gigantic'')
| G
| 109
|-
| tera- (Greek ''wonder'')
| T
| 1012
|}

Other, related systems (see below) use the same prefixes to multiply their units.

=== Length ===
The base unit of length, and originally the unit from which all other definitions flowed, is the [[meter]]. The original definition was "one ten-millionth the distance from the equator to the north pole." Lagrange's surveyors computed this distance (probably using a variation on Eratosthenes' tropical-shadow experiment) and inscribed it on a metal bar that they kept at the weights-and-measures headquarters building in Sèvres, [[France]].

But this artifact, being made of metal, tended to expand and contract. Centuries later, when the scientific community realized what had happened, the task of re-standardizing all meter sticks to the equator-to-pole-times-10-7 definition was judged too onerous. Therefore the meter was redefined. At first it was defined as 1,650,763.73 wavelengths of the orange-red line in the excitation spectrum of [[krypton]]-86. Today it is defined as 1⁄299,792,458th of a light-second.

The meter in all its multiples replaces all other units of measurement, long and short. Long distance is measured in the meter multiplied by a thousand--the kilometer. Short distances are measured in centimeters--or millimeters, or micrometers, or however small one needs to measure them.

=== Volume ===
The base unit of volume is derived from the meter: it's the ''cubic meter'' [m3]. Traditionally, the ''liter''<ref>http://www.bipm.org/en/si/si_brochure/chapter4/table6.html</ref> is used. 1 liter is defined as 10-3 m3 = 1 dm3. '''Capacity''', traditionally measured in liters, refers to the volume occupied by a liquid. Today, one liter is defined as the volume of one kilogram of water at four degrees [[Celsius]].

=== Mass ===
The base unit of mass is the ''gram''. Originally a gram was the mass of one cubic centimeter (see above), then called a ''milliliter'', of [[water]]. The Lagrange committee fashioned an artifact exactly one thousand times as heavy as this--the volume, in short, of one liter of water--and stored this permanently at Sèvres.

[[Joseph Lagrange|Lagrange]]'s committee also proposed a unit of mass called the ''grave'', to be equal to one thousand grams. But the [[French Revolution|Revolutionary]] government rejected this name as sounding too much like the [[German]] word ''graf'', translated as ''comte'' or [[count]] in French. Therefore, the artifact at Sèvres would be called a kilogram instead--and that artifact has that name to this day.

Mass never changes. But in addition to the prototype meter changing its length over time, scientists later realized that water has different densities at different [[temperature|temperatures]].

Today, the standard [[kilogram]] is kept at the International Bureau of Standards headquarters in Sèvres. It remains today the only generally accepted unit of measurement based on an artifact.

== Relation to other systems of measurement ==
The [[International System of Units]] borrows some definitions and concepts from the metric system--most notably the meter and the kilogram--and adds other definitions of other quantities, most notably [[time]], [[force]], [[amount of substance]], plane [[angle]], solid angle, and [[luminous intensity]]. The liter ''is not'' the unit of volume in that system, however, but liter is accepted for use with the SI.

In addition to the International System (or in French, ''Système International'', or SI for short), scientists have invented other systems of measurement that include units of time, force, [[energy]], and electric charge. The most popular are the meter-kilogram-second and centimeter-gram-second systems.

Various governing authorities have established conversion ratios to assist people in converting between the metric system and other, more traditional units of measurement. The definitions of US Customary units in the United States is an example of this. The metric system is more efficient and easier to learn.

== References ==
<references/>

== See Also ==
* [http://creationwiki.org/Metric_system Metric system] by [[CreationWiki]]
* [http://www.essex1.com/people/speer/metric.html Metric system] by Essex1.com
* [http://lamar.colostate.edu/~hillger/ The United States Metric Association]

[[Category:Units of Measurement]]

Sexual immorality

2009-07-26T12:48:50Z

DanBishop:

'''Sexual immorality''' is any act of sex outside of [[marriage]], and sometimes includes sexual acts even between spouses. Sexual immorality includes fornication, [[adultery]], [[homosexuality]], incest, pedophilia, bestiality, and any form of [[lust]]. The term is understood universally across cultures, though the norms slightly change (some cultures, such as the [[Greeks]] allowed pedophilia, and late 20th century [[atheism|godless]] culture allows homosexuality and fornication).

The [[Bible]] contains prohibitions on sexual immorality, most of which are listed in Leviticus 18<ref>[http://www.biblegateway.com/passage/?search=Leviticus%2018 Leviticus chapter 18]</ref>. "Thou shalt not commit adultery" is part of the [[Ten Commandments]].

The [[Greek language|Greek]] word πορνεία (''porneía''), often used in the [[New Testament]], is typically translated "fornication," although the word broadly refers to any form of illicit sexual intercourse,<ref>[http://bible.crosswalk.com/Lexicons/Greek/grk.cgi?number=4202&version=kjv The KJV New Testament Greek Lexicon]</ref> including remarriage after an un-Biblical [[divorce]] and those sexual acts that were prohibited under the [[Mosaic law]].<ref>[http://www.christiananswers.net/dictionary/fornication.html Fornication (WebBible™ Encyclopedia)]</ref> The word πορνεία is used in Acts 15:20 and Acts 15:28-29<ref>[http://www.blueletterbible.org/Bible.cfm?b=Act&c=15&v=1&t=KJV#top Acts chapter 15 (KJV)]</ref> to describe activities that are forbidden to [[Gentile]] Christians. The word can also figuratively mean [[idolatry]].

==References==
<references/>

[[Category:Sin]]

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Metric system

Sexual immorality