40 (angka): Perbedaan antara revisi
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Baris 41:
== Matematika ==
* Empat puluh merupakan [[bilangan komposit]], suatu [[:en:octagonal number|bilangan oktagonal]],<ref>{{Cite web|url=https://oeis.org/A000567|title=Sloane's A000567 : Octagonal numbers|last=|first=|date=|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-05-31}}</ref> dan karena merupakan jumlah empat [[:en:pentagonal number|bilangan pentagonal]] pertama, merupakan suatu [[:en:pentagonal pyramidal number|bilangan piramidal pentagonal]].<ref>{{Cite web|url=https://oeis.org/A002411|title=Sloane's A002411 : Pentagonal pyramidal numbers|last=|first=|date=|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-05-31}}</ref> Jumlah subset pembaginya sendiri (yaitu: 1, 4, 5, 10 dan 20) menghasilkan 40, sehingga 40 merupakan [[:en:semiperfect number|bilangan semi-sempurna]].<ref>{{Cite web|url=https://oeis.org/A005835|title=Sloane's A005835 : Pseudoperfect (or semiperfect) numbers|last=|first=|date=|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-05-31}}</ref>
<!--*Given 40, the [[Mertens function]] returns [[0 (number)|0]].<ref>{{Cite web|url=https://oeis.org/A028442|title=Sloane's A028442 : Numbers n such that Mertens' function is zero|last=|first=|date=|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-05-31}}</ref> 40 is the smallest number ''n'' with exactly 9 solutions to the equation [[Euler's totient function|φ]](''x'') = ''n''.
*Forty is the number of [[eight queens puzzle|''n''-queens problem]] solutions for ''n'' = 7.-->
* 40 adalah suatu [[:en:repdigit|repdigit]] pada bilangan basis 3 (1111, ''misalnya'' 3<sup>0</sup> + 3<sup>1</sup> + 3<sup>2</sup> + 3<sup>3</sup>) dan sebuah [[:en:Harshad number|bilangan Harshad]] dalam [[:en:base 10|basis 10]].<ref>{{Cite web|url=https://oeis.org/A005349|title=Sloane's A005349 : Niven (or Harshad) numbers|last=|first=|date=|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-05-31}}</ref>
== Ilmu alam ==
* [[Nomor atom]] [[Zirkonium]].
* '''Minus empat puluh''' adalah suatu [[suhu]] unik di mana derajat Fahrenheit sama dengan derajat Celsius; yaitu, −40 °F = −40 °C. Dalam bahasa Inggris disebut "''negative forty''", "''minus forty''" atau "''forty below''".
=== Astronomi ===
* [[Objek Messier]] [[Winnecke 4|M40]], adalah suatu [[:en:double star|bintang ganda]] dengan [[magnitudo semu]] 9.0 pada [[rasi bintang|konstelasi]] [[Ursa Mayor]]
* Objek [[New General Catalogue]]<ref>{{cite web|url=http://www.ngcic.org/|title=Account Suspended|work=ngcic.org}}</ref> [[NGC 40]], suatu [[nebula planeter]] dengan magnitude 12.4 pada konstelasi [[Cepheus]]
== Agama ==
Angka 40 dikenal dalam [[Yudaisme]], [[Kristen]], [[Islam]], dan tradisi [[Timur Tengah]] lain melambangkan suatu [[:en:Indefinite and fictitious numbers|angka besar terukur]]<!--, similar to "[[umpteen]]"-->.
=== Yudaisme ===
Dalam
* Hujan turun selama "empat puluh hari dan empat puluh malam" yang menyebabkan [[Air bah (Nuh)|Air bah]]. ({{Alkitab|Kejadian 7:4}})
Baris 85:
* Kehidupan [[Musa]] dibagi atas tiga periode yang masing-masing terdiri dari 40 tahun, yaitu masa pertumbuhan sampai dewasa dan melarikan diri dari Mesir, masa tinggal di Midian, dan masa perjalanan [[keluar dari Mesir]] di padang gurun ([[Kisah Para Rasul 7]]).<ref>{{Alkitab|Kisah Para Rasul 7:23,30,36}}</ref>
=== Islam ===
<!--*[[Muhammad]] was forty years old when he first received the revelation delivered by the archangel Gabriel.
*[[Masih ad-Dajjal]] roams around the Earth in forty days, a period of time that can be as many as forty months, forty years, and so on.
*God forbade the Fasiqun (the non-believers) from entering the Holy Land for 40 years to separate them from Musa ([[Moses]]) and his brother.<ref>Qur'an 5:25-26</ref>-->
* Musa melewatkan waktu 40 hari di atas Gunung Sinai di mana ia menerima [[Sepuluh Perintah Allah]].<ref>Qur'an 7:142</ref>
<!--*On the 40th verse (ayat) of the 2nd chapter of the Quran (Al-Baqarah) God changes the topic.
*Forty was the number of days that Prophet Ilyas ([[Elijah]]) spent in the wilderness before the angel appeared to him with God's message on [[Mount Horeb]].{{Citation needed|date=November 2012}}
Baris 109:
* In the [[Yazidi]] faith, The Chermera Temple (meaning “40 Men” in the Yazidi dialect) is so old that no one remembers how it came to have that name but it is believed to derive from the burial of 40 men on the mountaintop site.
-->
=== Adat penguburan ===
* Sejumlah tradisi Rusia percaya bahwa roh orang mati masih bergentayangan di sekitar tempat kematiannya selama empat puluh hari.
<!--* Many Christian Filipinos mark the end of the initial mourning period on the fortieth day after death, and have a [[Mass (liturgy)|Mass]] said. They believe that the soul remains on the earthly plane for forty days before entering the afterlife, recalling how Christ [[Ascension of Jesus|ascended to heaven]] forty days after his [[Resurrection of Jesus|Resurrection]].
Baris 129:
* In horse racing, the maximum permitted number of runners in the grand national is 40.
*The distance run in the [[40-yard dash]], an important metric in [[American football]] scouting.-->
* Dalam tenis, skor 40 merupakan poin ketiga yang diperoleh dalam suatu game.
<!--* Beginning with the 2013 season, the number of cars that will run each race in [[NASCAR]]'s second-level [[Nationwide Series]]. And effective with the 2016 season, it is the maximum number of participating cars in each [[Monster Energy NASCAR Cup Series]] race.
-->
== Bidang lain ==
[[
'''Empat puluh''' juga dijumpai pada:
<!--*Literally in other fields, after the Civil War, there were plans to offer the freed slaves [[40 acres and a mule]].-->
* ''Untuk mengerti orang, Anda harus diam di antara mereka selama 40 hari. ''~ suatu pepatah Arab''<ref>{{cite book|last=Dallal|first=Tamalyn|title=40 Days & 1001 Nights|publisher=Melati Press|year=2007|location=Seattle|pages=back cover|isbn=978-0-9795155-0-7|nopp=true}}</ref><ref>{{cite web|url=http://www.40daysand1001nights.com|title=40 Days & 1001 Nights - ''One Woman's Dance Through Life in the Islamic World''}}</ref>
* kaliber peluru pada sejumlah senjata api, yang terkenal antara lain [[.40 S&W]]. ([[:en:10mm Auto|10mm Auto]], meskipun menggunakan kaliber metrik, menggunakan kaliber yang sama, dan sering juga peluru yang sama.)
* Suatu [[pepatah]] "Hidup dimulai pada usia empat puluh"
<!--* in the expression "[[forty winks]]", meaning a short sleep-->
* Angka tertinggi yang pernah dihitung pada acara televisi anak-anak ''[[Sesame Street]]''
<!--*A song by [[Dave Matthews Band]]
*the number of years of marriage as the ruby [[wedding anniversary]]
Baris 168:
*[[Forty Foot]], a promontory on the southern tip of [[Dublin Bay]], Ireland, from which people have been swimming in the Irish Sea all year round for some 250 years.
*[[Eskimo]] have 40 words for snow. Which although untrue is an established phrase and is an example of usage as a large approximate number.-->
* [[Karantina]], praktik isolasi atau pemisahan sementara, diturunkan dari dialek Venetia dari frasa [[bahasa Italia]] 'quaranta giorni' artinya "empat puluh hari".
<!--* [[Fortycoats & Co.]] an Irish children's TV drama series of the 1980s, the origin of the name is based on the nickname of a Dublin tramp, Johnny Fortycoats, of the 1930s.-->
== Referensi ==
{{reflist}}
== Pustaka tambahan ==
* Stanley Brandes, Forty:The Age and the Symbol.
== Pranala luar ==
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