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21 小時前 · High-end EF2 damage to a home northeast of Lynn Haven, Florida During the evening of January 8 through January 9, a severe weather outbreak brought damaging winds and numerous tornadoes to the Southeastern and Eastern United States.On January 7, the Storm Prediction Center issued an enhanced risk for severe weather in the states of Texas, Louisiana, Mississippi, Alabama, and Florida, including ...
4 天前 · Background Titanic on sea trials, 2 April 1912 At the time of her entry into service on 2 April 1912, the Titanic was the second of three Olympic-class ocean liners, and was the largest ship in the world.She and the earlier RMS Olympic were almost one and a half times the gross register tonnage of Cunard's RMS Lusitania and RMS Mauretania, the previous record holders, and were nearly 100 feet ...
2 天前 · Probability theory. In probability theory and statistics, a normal distribution or Gaussian distribution is a type of continuous probability distribution for a real-valued random variable. The general form of its probability density function is. The parameter is the mean or expectation of the distribution (and also its median and mode ), while ...
4 天前 · What links here Related changes Upload file Special pages Permanent link Page information Cite this page Get shortened URL Download QR code In mathematics, sine and cosine are trigonometric functions of an angle.The sine and cosine of an acute angle are defined in the context of a right triangle: for the specified angle, its sine is the ratio of the length of the side that is opposite that ...
1 天前 · Sun. The Sun is the star at the center of the Solar System. It is a massive, nearly perfect sphere of hot plasma, [18] [19] heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies.
4 天前 · The number π (/paɪ/; spelled out as "pi") is a mathematical constant that is the ratio of a circle's circumference to its diameter, approximately equal to 3.14159. The number π appears in many formulae across mathematics and physics. It is an irrational number, meaning that it cannot be expressed exactly as a ratio of two integers, although ...
1 天前 · The BBC is a state owned public broadcasting company and operates under a royal charter.The charter is the constitutional basis for the BBC, and sets out the BBC's Object, Mission and Public Purposes. It emphasises public service, (limited) editorial independence, prohibits advertising on domestic services and proclaims the BBC is to "seek to avoid adverse impacts on competition which are not ...
