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Hydrogen peroxide is a chemical compound with the formula H
2O
2. In its pure form, it is a very pale blue liquid, slightly more viscous than water. It is used as an oxidizer, bleaching agent, and antiseptic. Concentrated hydrogen peroxide, or "high-test peroxide", is a reactive oxygen species and has been used as a propellant in rocketry. Its chemistry is dominated by the nature of its unstable peroxide bond.
Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. After hydrogen and helium, oxygen is the third-most abundant element in the universe by mass. At standard temperature and pressure, two atoms of the element bind to form dioxygen, a colorless and odorless diatomic gas with the formula O
2. Diatomic oxygen gas constitutes 20.95% of the Earth's atmosphere. Oxygen makes up almost half of the Earth's crust in the form of oxides.
O, or o, is the 15th letter in the ISO basic Latin alphabet and the fourth vowel letter in the modern English alphabet. Its name in English is o, plural oes.
Sandra Day O'Connor is a retired attorney, politician, and the first woman associate justice of the Supreme Court of the United States, a position she held from 1981 until her retirement in 2006. She was the first woman nominated and confirmed. Nominated by President Ronald Reagan, she was considered the swing vote for the Rehnquist Court and the beginning of the Roberts Court.
Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO2, most commonly found in nature as quartz and in various living organisms. In many parts of the world, silica is the major constituent of sand. Silica is one of the most complex and most abundant families of materials, existing as a compound of several minerals and as synthetic product. Notable examples include fused quartz, fumed silica, silica gel, and aerogels. It is used in structural materials, microelectronics (as an electrical insulator), and as components in the food and pharmaceutical industries.
Roseann O'Donnell is an American comedian, producer, actress, author, and television personality. She began her comedy career as a teenager and received her breakthrough on the television series Star Search in 1984. After a series of television and film roles that introduced her to a larger national audience, O'Donnell hosted her own syndicated daytime talk show, The Rosie O'Donnell Show, between 1996 and 2002, which won several Daytime Emmy Awards. During this period, she developed the nickname "Queen of Nice", as well as a reputation for philanthropic efforts.
Big O notation is a mathematical notation that describes the limiting behavior of a function when the argument tends towards a particular value or infinity. Big O is a member of a family of notations invented by Paul Bachmann, Edmund Landau, and others, collectively called Bachmann–Landau notation or asymptotic notation.
Peter Seamus O'Toole was a British stage and film actor of Irish descent. He attended the Royal Academy of Dramatic Art and began working in the theatre, gaining recognition as a Shakespearean actor at the Bristol Old Vic and with the English Stage Company. In 1959 he made his West End debut in The Long and the Short and the Tall, and played the title role in Hamlet in the National Theatre’s first production in 1963. Excelling on the London stage, O'Toole was known as a "hellraiser" off it.
Sinéad Marie Bernadette O'Connor is an Irish singer-songwriter who rose to fame in the late 1980s with her debut album The Lion and the Cobra. O'Connor achieved worldwide success in 1990 with a new arrangement of Prince's song "Nothing Compares 2 U."
Shaquille Rashaun "Shaq" O'Neal is an American former professional basketball player who is a sports analyst on the television program Inside the NBA on TNT. He played for six teams over his 19-year career in the National Basketball Association (NBA). At 7 ft 1 in (2.16 m) tall and 325 pounds (147 kg), O'Neal is regarded as one of the greatest basketball players of all time.
William James O'Reilly Jr. is an American journalist, author, and former television host. During the late 1970s and 1980s, he reported for local television stations in the United States and later for CBS News and ABC News. He anchored the tabloid television program Inside Edition from 1989 to 1995. O'Reilly joined the Fox News Channel in 1996 and hosted The O'Reilly Factor until 2017. The O'Reilly Factor was the highest-rated cable news show for 16 years, and he was described by media analyst Howard Kurtz as "the biggest star in the 20-year history at Fox News" at the time of his ouster. He is the author of numerous books and hosted The Radio Factor (2002–2009). O'Reilly is a conservative commentator.
Georgia Totto O'Keeffe was an American artist. She was known for her paintings of enlarged flowers, New York skyscrapers, and New Mexico landscapes. O'Keeffe has been recognized as the "Mother of American modernism".
Catherine Anne O'Hara is a Canadian actress, comedian, writer, and singer. She is the recipient of several accolades, including a Genie Award, two Primetime Emmy Awards, and five Canadian Screen Awards. She was appointed an Officer of the Order of Canada in 2018 and was honored with the Governor General's Performing Arts Lifetime Artistic Achievement Award in 2020. O'Hara first drew notice as an actress in 1974 as a member of The Second City improvisational comedy troupe in Toronto. She landed her first significant television role starring opposite John Candy and Dan Aykroyd in the main cast of the sitcom Coming Up Rosie (1975–1978). The following year, O'Hara and Candy began work on the sketch comedy series Second City Television (1976–84), where she drew critical acclaim for both her work as a comedic actress and writer, winning a Primetime Emmy Award for Outstanding Writing for a Variety Series in 1981.
Ronald Antonio O'Sullivan is an English professional snooker player from Essex. As a six-time world champion, a record seven-time Masters champion, and a record seven-time UK champion, he is the most successful player in the history of snooker's Triple Crown Series, with a record 20 titles. He also holds the record for the most ranking titles in professional snooker, with 37. His career prize money of over £11.7 million is the most by any player in snooker history.
The Irish are an ethnic group and nation native to the island of Ireland, who share a common Irish ancestry, identity and culture. Ireland has been inhabited for about 12,500 years according to archaeological studies. For most of Ireland's recorded history, the Irish have been primarily a Gaelic people. From the 9th century, small numbers of Vikings settled in Ireland, becoming the Norse-Gaels. Anglo-Normans conquered parts of Ireland in the 12th century, while England's 16th/17th-century conquest and colonisation of Ireland brought many English and Lowland Scots people to parts of the island, especially the north. Today, Ireland is made up of the Republic of Ireland and the smaller Northern Ireland. The people of Northern Ireland hold various national identities including British, Irish, Northern Irish or some combination thereof.
The O. J. Simpson murder case was a criminal trial held in Los Angeles County Superior Court. Former National Football League (NFL) player, broadcaster and actor O. J. Simpson was tried and acquitted on two counts of murder for the June 12, 1994, slashing deaths of his ex-wife, Nicole Brown Simpson, and her friend Ron Goldman. At 12:10 a.m. on June 13, 1994, Brown and Goldman were found stabbed to death outside her condominium in the Brentwood neighborhood of Los Angeles. Simpson became a person of interest after police found a bloody glove behind his house and was formally charged with the murders on June 17. When he did not turn himself in at the agreed time, he became the object of a low-speed pursuit in a white 1993 Ford Bronco SUV owned and driven by his friend Al Cowlings. TV stations interrupted coverage of the 1994 NBA Finals to broadcast the incident. The pursuit was watched live by an estimated 95 million people. The pursuit, arrest, and trial were among the most widely publicized events in American history. The trial—often characterized as the trial of the century because of its international publicity—spanned eleven months, from the jury's swearing-in on November 9, 1994. Opening statements were made on January 24, 1995, and the verdict was announced on October 3, 1995 when Simpson was acquitted on two counts of murder. According to USA Today, the case has been described as the "most publicized" criminal trial in history.
Conan Christopher O'Brien is an American television host, comedian, writer, podcaster, and producer. He is best known for hosting the late-night talk shows Late Night with Conan O'Brien, The Tonight Show with Conan O'Brien, and since 2010, Conan on the cable channel TBS. Prior to his hosting career, he was a writer for Saturday Night Live and The Simpsons.
Orenthal James Simpson, nicknamed "The Juice", is an American former football running back, broadcaster, actor, advertising spokesman, and convicted felon. Once a popular figure with the U.S. public, he is now best known for being tried for the murders of his former wife, Nicole Brown Simpson, and her friend, Ron Goldman. Simpson was acquitted of the murders in criminal court, but was later found responsible for both deaths in a civil trial.
Dylan O'Brien is an American actor. He is known for his lead role as Thomas in the Maze Runner dystopian science fiction trilogy and for his role as Stiles Stilinski in the MTV television series Teen Wolf. O'Brien's other work includes starring roles in films such as The First Time and American Assassin and supporting roles in The Internship and Deepwater Horizon.
Lupita Amondi Nyong'o is a Kenyan-Mexican actress. The daughter of Kenyan politician Peter Anyang' Nyong'o and Dorothy Ogada Buyu, Nyong'o was born in Mexico City, where her father was teaching, and was raised in Kenya from age one. She attended college in the United States, earning a bachelor's degree in film and theatre studies from Hampshire College.
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