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Half-Life is a series of first-person shooter (FPS) games created by Valve. The games combine shooting combat, puzzles and storytelling. The original Half-Life, Valve's first product, was released in 1998 for Windows to critical and commercial success. Players control Gordon Freeman, a scientist who must survive an alien invasion.
On November 23, 1999, GameSpot reported that 2015, Inc. was developing a Half-Life expansion pack to follow Half-Life: Opposing Force. 2015, Inc declined to comment. [1] On March 18, 2000, the Adrenaline Vault reported that the new expansion was named Half-Life: Hostile Takeover, and that it had appeared on retail product lists with a release date of late August. [2]
The half-life of a radioactive isotope (usually denoted by t 1/2) is a more familiar concept than the mean-life, so although the equations above are expressed in terms of the mean-life, it is more usual to quote the value of 14 C 's half-life than its mean-life. The currently accepted value for the half-life of 14 C is 5,700 ± 30 years. [21]
Half-Life 3 originally was the third episode in a series of DLC campaigns for Half-Life 2, but the trilogy was never concluded, and Valve has been silent about whether the game has undergone a ...
The Collatz conjecture states that all paths eventually lead to 1. The Collatz conjecture[ a] is one of the most famous unsolved problems in mathematics. The conjecture asks whether repeating two simple arithmetic operations will eventually transform every positive integer into 1.
The Higgs boson, sometimes called the Higgs particle, [ 9][ 10] is an elementary particle in the Standard Model of particle physics produced by the quantum excitation of the Higgs field, [ 11][ 12] one of the fields in particle physics theory. [ 12] In the Standard Model, the Higgs particle is a massive scalar boson with zero spin, even ...
Radiometric dating. Radiometric dating, radioactive dating or radioisotope dating is a technique which is used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they were formed. The method compares the abundance of a naturally occurring radioactive isotope within the material to ...
This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days and years. Current methods make it difficult to measure half-lives between approximately 10 −19 and 10 −10 seconds. [1]