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A decade is a period of 10 years. The word is derived (via French and Latin) from the Ancient Greek: δεκάς, romanized: dekas, which means a group of ten.adjective. vi·cen·ni·al | \ vī-ˈse-nē-əl \A decade is a period of ten years, especially one that begins with a year ending in 0, for example 1980 to 1989. … the last decade of the nineteenth century.
Contents
What is 2 decades called?
adjective. vi·cen·ni·al | \ vī-ˈse-nē-əl \
How much year is a decade?
A decade is a period of ten years, especially one that begins with a year ending in 0, for example 1980 to 1989. … the last decade of the nineteenth century.
How many numbers are in one decade?
One decade (symbol dec) is a unit for measuring ratios on a logarithmic scale, with one decade corresponding to a ratio of 10 between two numbers.
Is 7 years almost a decade?
A decade is a period of time equivalent to 10 years.
What called 40 years?
A person between 20 and 29 is called a vicenarian. A person between 30 and 39 is called a tricenarian. A person between 40 and 49 is called a quadragenarian. A person between 50 and 59 is called a quinquagenarian. A person between 60 and 69 is called a sexagenarian.
What is a 100 years called?
a centennial. a period of 100 years; century.
What do we call 50 years?
golden jubilee: 50th anniversary. diamond jubilee: 60th anniversary (or 75th anniversary) platinum jubilee: 70th anniversary.
What are 20 years called?
vicennial. / (vɪˈsɛnɪəl) / adjective. occurring every 20 years. relating to or lasting for a period of 20 years.
What is called decade?
: a period of ten years.
What is in a decade?
noun. a period of ten years: the three decades from 1776 to 1806. a period of ten years beginning with a year whose last digit is zero: the decade of the 1980s. a group, set, or series of ten.
What is 1 decade ago?
Yahoo answers say “1 decade ago” for any answer after 10 years, over the traditional “answered X years ago” 32. 3.
What do we call 15 years?
quindecennial. / (ˌkwɪndɪˈsɛnɪəl) / adjective. occurring once every 15 years or over a period of 15 years. noun.
What is every 12 years called?
Duodecennial word can be used as alternatively for a gap once in 12 years .
What is 10 year called?
A decade is a period of ten years, especially one that begins with a year ending in 0, for example, 1980 to 1989.
How long is a century?
A century is a period of 100 years. Centuries are numbered ordinally in English and many other languages. The word century comes from the Latin centum, meaning one hundred. Century is sometimes abbreviated as c.
What does 2 decade mean?
A decade is a period of ten years, especially one that begins with a year ending in 0, for example, 1980 to 1989. … the last decade of the nineteenth century.
Can we say 2 decades?
Two decades means 20 years. If you want to say 21 years you have to say more than two decades. If you want to say 19 years you have to say close to two decades.
How long is a century?
A century is a period of 100 years. Centuries are numbered ordinally in English and many other languages. The word century comes from the Latin centum, meaning one hundred. Century is sometimes abbreviated as c.
What does Vicennial mean?
vicennial. / (vɪˈsɛnɪəl) / adjective. occurring every 20 years. relating to or lasting for a period of 20 years.
Decade – Wikipedia
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Vicennial Definition & Meaning – Merriam-Webster
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Decade (log scale) – Wikipedia
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How Long Is A Decade In Years? | Science Trends
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Convert 1 Decade to Years
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Convert 1 Decade to Year
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1 Decades to Years | 1 decade to yr – Convertilo
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Decades to Years Conversion – Inch Calculator
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1 decade is equal to how many years
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Decades to Years Conversion Tool
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How Many years is a Decade – Time Calculator
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Decades to Years (decade to yr) converter – All The Units
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Wikipedia
Period of 10 years
A decade is a period of 10 years. The word is derived (via French and Latin) from the Ancient Greek: δεκάς, romanized: dekas, which means a group of ten. Decades may describe any ten-year period, such as those of a person’s life, or refer to specific groupings of calendar years.
Usage [ edit ]
Any period of ten years is a “decade”.[1] For example, the statement that “during his last decade, Mozart explored chromatic harmony to a degree rare at the time” merely refers to the last ten years of Wolfgang Amadeus Mozart’s life without regard to which calendar years are encompassed. Also, ‘the first decade’ of a person’s life begins on the day of their birth and ends at the end of their 10th year of life when they have their 10th birthday; the second decade of life starts with their 11th year of life (during which one is typically still referred to as being “10”) and ends at the end of their 20th year of life, on their 20th birthday; similarly, the third decade of life, when one is in one’s twenties or 20s, starts with the 21st year of life, and so on, with subsequent decades of life similarly described by referencing the tens digit of one’s age.
0-to-9 decade [ edit ]
The most widely used method for denominating decades is to group years based on their shared tens digit, from a year ending in a 0 to a year ending in a 9 – for example, the period from 1960 to 1969 is the 1960s,[2] and the period from 1990 to 1999 is the 1990s. Sometimes, only the tens part is mentioned (’60s or sixties, and ’90s or nineties), although this may leave it ambiguous as to which century is meant. However, this method of grouping decades cannot be applied to the decade immediately preceding AD 10, because there was no year 0.
Particularly in the 20th century, 0-to-9 decades came to be referred to with associated nicknames, such as the “Swinging Sixties” (1960s), the “Warring Forties” (1940s) and the “Roaring Twenties” (1920s). This practice is occasionally also applied to decades of earlier centuries; for example, referencing the 1890s as the “Gay Nineties” or “Naughty Nineties”.
1-to-0 decade [ edit ]
A rarer approach groups years from the beginning of the AD calendar era to produce successive decades from a year ending in a 1 to a year ending in a 0, with the years 1–10 described as “the 1st decade”, years 11–20 “the 2nd decade”, and so on; later decades are more usually described as ‘the Nth decade of the Mth century’ (using the strict interpretation of ‘century’).[a] For example, “the second decad of the 12th. Cent.” (sic);[3] “The last decade of that century”;[4] “1st decade of the 16th century”;[5] “third decade of the 16th century”;[6] “the first decade of the 18th century”.[7] This decade grouping may also be identified explicitly; for example, “1961–1970”;[8] “2001–2010”;[9] “2021–2030”.[10] The BC calendar era ended with the year 1 BC and the AD calendar era began the following year, AD 1. There was no year 0.
Usage methods compared Year 1 2 3 … 9 10 11 12 … 19 20 … 2000 2001 2002 … 2009 2010 2011 2012 … 2019 2020 2021 2022 … 2029 2030 0-to-9 decade 0s 10s … 2000s 2010s 2020s … 1-to-0 decade 1st decade of the 1st century 2nd decade of the 1st century … 1st decade of the 21st century 2nd decade of the 21st century 3rd decade of the 21st century
Public usage of the two methods [ edit ]
A YouGov poll was conducted on December 2, 2019, asking 13,582 adults in the United States, “When do you think the next decade will begin and end?” Results showed that 64% answered that “the next decade” would begin on January 1, 2020, and end on December 31, 2029 (0-to-9 method); 17% answered that “the next decade” would begin on January 1, 2021, and end on December 31, 2030 (1-to-0 method); 19% replied that they did not know.[11]
See also [ edit ]
References [ edit ]
Notes [ edit ]
^ There are two ways of thinking about when a century begins and ends. The “strict” viewpoint counts centuries from −01 to −00, while the “popular” viewpoint counts centuries from −00 to −99. For example, the “first decade of the 19th century” may mean either 1801–1810 (if used in “strict” terms) or 1800–1809 (if used in “popular” terms). See century for more information.
Decade (log scale)
Unit for measuring ratios on a logarithmic scale
0, 101, 102, 103) Four powers of 10 spanning a range of three decades: 1, 10, 100, 1000 (10, 10, 10, 10
Four grids spanning three decades of resolution: One thousand 0.001s, one-hundred 0.01s, ten 0.1s, one 1.
One decade (symbol dec[1]) is a unit for measuring ratios on a logarithmic scale, with one decade corresponding to a ratio of 10 between two numbers.[2]
Example: Scientific notation [ edit ]
When a real number like .007 is denoted alternatively by 7. × 10—3 then it is said that the number is represented in scientific notation. More generally, to write a number in the form a × 10b, where 1 < a < 10 and b is an integer, is to express it in scientific notation, and a is called the significand or the mantissa, and b is its exponent.[3] The numbers so expressible with an exponent equal to b span a single decade, from 10^b to 10^(b+1). Frequency measurement [ edit ] Decades are especially useful when describing frequency response of electronic systems, such as audio amplifiers and filters.[4][5] Calculations [ edit ] The factor-of-ten in a decade can be in either direction: so one decade up from 100 Hz is 1000 Hz, and one decade down is 10 Hz. The factor-of-ten is what is important, not the unit used, so 3.14 rad/s is one decade down from 31.4 rad/s. To determine the number of decades between two frequencies ( f 1 {\displaystyle f_{1}} & f 2 {\displaystyle f_{2}} ), use the logarithm of the ratio of the two values: log 10 ( f 2 / f 1 ) {\displaystyle \log _{10}(f_{2}/f_{1})} [4][5] or, using natural logarithms: ln f 2 − ln f 1 ln 10 {\displaystyle \ln f_{2}-\ln f_{1} \over \ln 10} [6] How many decades is it from 15 rad/s to 150,000 rad/s? log 10 ( 150000 / 15 ) = 4 {\displaystyle \log _{10}(150000/15)=4} How many decades is it from 3.2 GHz to 4.7 MHz? log 10 ( 4.7 × 10 6 / 3.2 × 10 9 ) = − 2.83 {\displaystyle \log _{10}(4.7\times 10^{6}/3.2\times 10^{9})=-2.83} How many decades is one octave? One octave is a factor of 2, so log 10 ( 2 ) = 0.301 {\displaystyle \log _{10}(2)=0.301} just major third + three octaves, 10/1 ( ( help · info ) To find out what frequency is a certain number of decades from the original frequency, multiply by appropriate powers of 10: What is 3 decades down from 220 Hz? 220 × 10 − 3 = 0.22 {\displaystyle 220\times 10^{-3}=0.22} What is 1.5 decades up from 10 Hz? 10 × 10 1.5 = 316.23 {\displaystyle 10\times 10^{1.5}=316.23} To find out the size of a step for a certain number of frequencies per decade, raise 10 to the power of the inverse of the number of steps: What is the step size for 30 steps per decade? 10 1 / 30 = 1.079775 {\displaystyle 10^{1/30}=1.079775} Graphical representation and analysis [ edit ] Decades on a logarithmic scale, rather than unit steps (steps of 1) or other linear scale, are commonly used on the horizontal axis when representing the frequency response of electronic circuits in graphical form, such as in Bode plots, since depicting large frequency ranges on a linear scale is often not practical. For example, an audio amplifier will usually have a frequency band ranging from 20 Hz to 20 kHz and representing the entire band using a decade log scale is very convenient. Typically the graph for such a representation would begin at 1 Hz (100) and go up to perhaps 100 kHz (105), to comfortably include the full audio band in a standard-sized graph paper, as shown below. Whereas in the same distance on a linear scale, with 10 as the major step-size, you might only get from 0 to 50. Bode plot showing the concept of a decade: each major division on the horizontal axis is one decade Electronic frequency responses are often described in terms of "per decade". The example Bode plot shows a slope of −20 dB/decade in the stopband, which means that for every factor-of-ten increase in frequency (going from 10 rad/s to 100 rad/s in the figure), the gain decreases by 20 dB. See also [ edit ] One-third octave is called a decidecade or ddec.[7] Other frequency ratio interval units include the cent ( 2 1 / 1200 {\displaystyle 2^{1/1200}} ), the octave ( 2 {\displaystyle 2} = 1200 cents), and semitone ( 2 1 / 12 {\displaystyle 2^{1/12}} = 100 cents).
How Long Is A Decade In Years?
How Long Is A Decade In Years?
A decade is a period of time equivalent to 10 years. The word “decade” originally stems from the Greek word dekas (δεκάς), meaning “a group of ten.”
This word was transmitted through the Romans, who commonly used the prefix dec- to describe collections of 10 items, such as a decathlon, a collection of 10 athletic challenges, or a decagon, a regular 10-sided polygon. Other divisions of time that derive from Latin include the century (100 years) and the millennium (1000 years).
Technically, any group of 10 years is its own decade. The term “decade” is generally used to refer to periods of time based on the tens digit of the calendar year. So the “1980s” refers to the decade of time between 1980–1989.
Since the Gregorian calendar begins on 1 AD (there is no year 0 in the Gregorian calendar), the first decade of the Gregorian calendar refers to the period of time between 1–10 AD, the second decade refers to 11–20 AD, etc. So, even though “the nineties” refers to the years between 1990-1999 AD, the 200th decade refers to the time between 1991–2000 AD.
An event that recurs every decade is called decennial. Similarly, an event that recurs every 100 years is a centennial event and every 1000 years is a millennial event. For example, the U.S. government administers a census decennially; every 10 years. Many high school and college reunions occur every 10 years as well.
Decades have come to culturally symbolize a kind of rebirth; a clean slate from which people can start again. The identification of a decade as a distinct period of time that divides our experience has given the concept of “decade” a lot of symbolic meaning. Decades throughout U.S. history are often referred to by a nickname that encapsulates major cultural events or symbolizes the general cultural ethos during that time. For example, “the Roaring Twenties” refers to the 1920s, a time of great economic growth and sociocultural change. The 1940s are sometimes referred to as “The Fighting Forties” as a reference to the United States’ involvement in both the European and Pacific theatres of WWII. In some ways, the decade is the historical unit of time; history is often divided into events that occurred in their respective decades.
Important Events Of 20th Century By Decade
The 1900s
1903 – The first manned flight by the Orville brothers.
1905 – Albert Einstien publishes his paper On the Electrodynamics of Moving Bodies, introducing the Special Theory of Relativity.
1906 – The 1906 earthquake of San Francisco kills 3000 people.
1907 – Guglielmo Marconi establishes the first trans-Atlantic radio communications system.
1908 – The Tunguska event occurs. An explosion in Siberia decimates 770 square miles of surrounding forest. The explosion is generally attributed to a meteor impact.
The 1910s
1910 – The Mexican Revolution begins.
1913 – Niels Bohr introduces his semiclassical model of the atom, laying the foundation for future quantum mechanics.
1914 – Gavrilo Princip assassinates the Austrian Archduke Franz Ferdinand in his motorcade in broad daylight, igniting the European powder keg and setting off WWI.
1916 – The first manned tanks are used in war by the French during the Battle of Fleur-Courcelette.
1917 – The U.S. officially enters WWI. The October Revolution in Russia deposes the Tsarist autocracy.
1919 – The Treaty of Versailles is signed, officially ending WWI. Ernst Rutherford discovers the proton.
The 1920s
1920 – The Mexican Revolution ends. Prohibition-era in the U.S. begins. Gandhi begins his movement in colonial India.
1921 – Adolf Hitler becomes Fuhrer of the Nazi party. The Soviet Union annexes the territory of Georgia.
1923 – TIME magazine is first published. The Great Kantō earthquake in Japan kills 105,000 people.
1924 – The Islamic caliphate is abolished, officially dissolving the Ottoman Empire, the single longest-lived empire in human history.
1928 – Alexander Fleming discovers penicillin, ushering in a new age of antibiotics. Walt Disney creates Mickey Mouse.
1929 – Wall Street crashes on Black Tuesday (October 29, 1929) and the Great Depression begins. International trade drops by 50% during this time.
The 1930s
1930 – First FIFA world cup is hosted in Uruguay. Pluto is discovered by Clyde Tombaugh.
1931 – Mao Zedong establishes the Chinese Soviet Republic.
1932 – The neutron is discovered by British physicist James Chadwick. BBC begins broadcasting.
1933 – Prohibition-era in the U.S. ends.
1934 – Hitler declares himself Fuhrer of Germany. The infamous American mobster John Dillinger is killed by the FBI.
1936 – The Spanish Civil War begins. The last Tasmanian Tiger, named “Benjamin,” dies in Hobart.
1937 – The first artificial element Technetium is synthesized. The Hindenberg zeppelin crashes in Lakehurst, New Jersey.
1938 – The Great Purge in the Soviet Union kill 700,000. Superman makes his first appearance in Action Comics #1.
1939 – The German invasion of Poland begins WWII.
The 1940s
1940 – Germany invades France.
1941 – Japan attacks Pearl Harbor. Operation Reinhard commences and the Nazis begin exterminating Jews.
1944 – The Allied Forces storm the beaches of Normandy on D-Day (June 6th). The first electronic computer Colossus is created.
1945 – WWII ends. President Truman drops 2 atomic warheads codenamed “Fatman” and “Little Boy” on Nagasaki and Hiroshima. The U.N. is founded.
1946 – The first images of Earth are taken from space. The Philippines gains independence from the U.S.
1947 – American pilot Chuck Yeager becomes the first human to break the sound barrier.
1948 – The U.N. annexes territories in Palestine, creating the modern nation of Israel. Gandhi is assassinated.
1949 – Mao Zedong establishes the People’s Republic of China.
The 1950s
1950 – The Korean War begins.
1952 – Egypt gains independence from Great Britain. Jonas Salk invents the Polio vaccine.
1953 – Francis Crick and James Watson discover the double-helical structure of DNA. Elvis Presley begins his musical career.
1954 – The U.S. Supreme Court decision in Brown v. Board of Education abolishes racial segregation in public schools. The Soviet Union becomes the first to generate electricity via nuclear power.
1957 – The soviet union launches Sputnik I.
1958 – NASA is founded. The first cassette tapes are invented.
1959 – The Vietnam War begins. Human population reaches 3 billion.
The 1960s
1960 – The first birth control pill becomes commercially available. The first laser is built.
1961 – Russian cosmonaut Yuri Gagarin becomes the first human in space. The Berlin Wall is constructed.
1962 – The Cuban missile crisis occurs.
1963 – Martin Luther King Jr. gives his famous “I have a dream” speech during the March on Washington. JFK is assassinated by Lee Harvey Oswald.
1964 – The Civil Rights Act in the U.S. abolishes segregation.
1967 – The Beatles release the album Sgt. Pepper’s Lonely Hearts Club Band.
1968 – MLK is assassinated by James Earl Ray.
1969 – American astronaut Neil Armstrong becomes the first human on the moon. Charles Manson and his cult commit the Manson family murders.
The 1970s
1970 – 4 students are killed by the Ohio National Guard during the Kent State Massacre. The Treaty on the Non-Proliferation of Nuclear Weapons is ratified.
1971 – The first microchip is invented.
1974 – Richard Nixon resigns as U.S. president after the Watergate scandal. the carnation Revolution establishes a democratic government in Portugal.
1975 – The Vietnam War ends with the Fall of Saigon. The Khmer Rouge in Cambodia takes power and begins executing political opponents.
1976 – Steve Wozniak and Steve Jobs found the computer company Apple.
1979 – Smallpox is considered eradicated. The Sandinistas in Nicaragua overthrow the Somoza dictatorship.
The 1980s
1980 – Mt. St. Helen’s erupts in Washington state. Archbishop Oscar Romero is assassinated in El Salvador by right-wing extremists.
1983 – The first GPS becomes commercially available. The U.S. invades Grenada.
1984 – the HIV virus is identified as the cause of AIDS.
1986 – The Challenge shuttle disaster occurs. The Chernobyl reactor has a nuclear meltdown.
1989 – The Fall of the Berlin Wall and the dissolution of the Soviet Union. The Exxon Valdez oil spill occurs.
The 1990s
1990 – Tim Berners-Lee invents the World Wide Web. The Hubble Space Telescope is launched.
1992 – The EU is created through the Maastricht Treaty. The first extrasolar planets are discovered.
1994 – Nelson Mandela is elected in South Africa. Kim Jong-Il becomes the leader of North Korea.
1995 – Domestic terrorist Timothy McVeigh commits the Oklahoma City bombings, killing 168 people. The Bosnian war ends.
1997 – Tony Blair becomes prime minister of the U.K. Princess Diana dies in a car crash in Paris.
1998 – Larry Page and Sergey Brin found the company Google.
1999 – The EU adopts the Euro as its official currency. Hugo Chavez becomes president of Venezuela. Dylan Klebold and Eric Harris commit the Columbine High Schol Massacre. The total human population reaches 6 billion.
Other Names For Units Of Calendar Time
A decade is just a name for one particular span of time on a calendar (10 years). Other names for spans of calendar time include:
nundine – 9 days. Used by the Romans to set their market calendars.
fortnight – 2 weeks (14 days)
quinzième – 15 days. Derives from the French word for 15, quinze.
dog year – about 1/7 a year (~52 days). Named after the life expectancy of the average dog.
biennium – 2 years.
triennium – 3 years
quadrennium – 4 years. Mostly used to refer to the period of time in between each Olympic games.
lustrum – 5 years. Every lustrum, the Romans would have an empire-wide census.
score – 20 years. Commonly associated with opening words of Abraham Lincoln’s Gettysburg Address: (Four score and seven years ago….)
quinquagenary – 50 years. A person who is 50+ years old is called a quinquagenarian.
century – 100 years. A person who is 100+ years is called a centenarian.
bicentennium – 200 years.
millennium – 1000 years. The plural of “millennium” is “millennia”
Piktun – 7885 years. 1 Piktun corresponds to one full cycle of the Mayan Long Count calendar.
megaannum – 1 million years.
galactic year – approximately 230 million years. A galactic year is the amount of time it takes the solar system to rotate around the Milky Way Galaxy once.
Kalpa – 4.32 billion years. In Buddhist and Hindu cosmology, 1 Kalpa is the amount of time between the creation and recreation of the universe.
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