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Bromochlorodifluoromethane (BCF), also referred to by the code numbers Halon 1211 and Freon 12B1, is a haloalkane with the chemical formula C F 2 Cl Br. It is used for fire suppression, especially for expensive equipment or items that could be damaged by the residue from other types of extinguishers. [ 1 ]
A more intuitive characteristic of exponential decay for many people is the time required for the decaying quantity to fall to one half of its initial value. (If N (t) is discrete, then this is the median life-time rather than the mean life-time.) This time is called the half-life, and often denoted by the symbol t1/2.
In modern times, a season batting average of .300 or higher is considered to be excellent, and an average higher than .400 a nearly unachievable goal. The last Major League Baseball (MLB) player to do so, with enough plate appearances to qualify for the batting championship, was Ted Williams of the Boston Red Sox, who hit .406 in 1941. [4]
Wild was re-elected by just 2 percentage points in 2022, while Biden carried her district by 1 point two years prior. 8th Congressional District (Scranton): ...
California, the biggest U.S. milk-producing state, on Thursday confirmed two human cases of bird flu in people who had contact with dairy cattle infected by the virus. The cases bring total U.S ...
U.S. Secretary of State Antony Blinken spoke with Israeli Defense Minister Yoav Gallant on Monday and urged further actions to substantially increase humanitarian aid in Gaza, the State Department ...
The statistic was invented in the late 1940s by Brooklyn Dodgers statistician Allan Roth with then-Dodgers general manager Branch Rickey. [3] [4] In 1954, Rickey, who was then the general manager of the Pittsburgh Pirates, was featured in a Life Magazine graphic in which the formula for on-base percentage was shown as the first component of an all-encompassing "offense" equation. [5]
The U.S. has imposed visa restrictions on senior officials at a European charter flight company for "facilitating irregular migration" through Nicaragua as the Biden administration seeks to curb ...