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J. Robert Oppenheimer (born Julius Robert Oppenheimer; / ˈ ɒ p ən h aɪ m ər / OP-ən-hy-mər; April 22, 1904 – February 18, 1967) was an American theoretical physicist.He was director of the Manhattan Project's Los Alamos Laboratory during World War II and is often called the "father of the atomic bomb".
John Fitzgerald Kennedy (May 29, 1917 – November 22, 1963), often referred to as JFK, was an American politician who served as the 35th president of the United States from 1961 until his assassination in 1963. He was the youngest person elected president. [2] Kennedy served at the height of the Cold War, and the majority of his foreign policy ...
John William Ferrell was born on July 16, 1967, in Irvine, California, [2] to Betty Kay ( née Overman; born 1940), a teacher who taught at Old Mill School elementary school and Santa Ana College, [6] and Roy Lee Ferrell Jr. (born 1941), who played saxophone and keyboards for the Righteous Brothers. [7] [8] His parents were both natives of ...
More than 800 video and audio files – including D.C. Metropolitan Police radio transmissions, Capitol Police body-worn camera footage, and Capitol surveillance camera footage – were later obtained as evidence in Trump's impeachment trial. The evidence showed that the assailants launched a large and coordinated attack.
On 6 and 9 August 1945, the United States detonated two atomic bombs over the Japanese cities of Hiroshima and Nagasaki. The bombings killed between 129,000 and 226,000 people, most of whom were civilians, and remain the only use of nuclear weapons in an armed conflict. Japan surrendered to the Allies on 15 August, six days after the bombing of ...
Papua New Guinea. v. t. e. In the United States, academic grading commonly takes on the form of five, six or seven letter grades. Traditionally, the grades are A+, A, A−, B+, B, B−, C+, C, C−, D+, D, D− and F, with A+ being the highest and F being lowest. In some cases, grades can also be numerical. Numeric-to-letter-grade conversions ...
Worldwide distribution of country calling codes. Regions are coloured by first digit. Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks.
The standard deviation σ of X is defined as which can be shown to equal. Using words, the standard deviation is the square root of the variance of X . The standard deviation of a probability distribution is the same as that of a random variable having that distribution. Not all random variables have a standard deviation.
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