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2 天前 · What links here Related changes Upload file Special pages Permanent link Page information Cite this page Get shortened URL Download QR code This chronological list of school shootings in the United States since the year 2000 includes school shootings in the United States that occurred at K–12 public and private schools, as well as at colleges and universities, and on school buses.
1 天前 · Sustainability is a social goal for people to exist on Earth over a long period of time. Definitions of this term are disputed and have varied with literature, context, and time. [2][1] Sustainability usually has three dimensions (or pillars): environmental, economic, and social. [1]
3 天前 · Most transistors are made from very pure silicon, and some from germanium, but certain other semiconductor materials are sometimes used. A transistor may have only one kind of charge carrier in a field-effect transistor, or may have two kinds of charge carriers in bipolar junction transistor devices.
3 天前 · William Henry Gates III (born October 28, 1955) is an American business magnate best known for co-founding the software company Microsoft with his childhood friend Paul Allen. During his career at Microsoft, Gates held the positions of chairman, chief executive officer (CEO), president, and chief software architect, while also being its largest ...
1 天前 · Lake Baikal is in a rift valley, created by the Baikal Rift Zone, where the Earth's crust is slowly pulling apart. [5] At 636 km (395 mi) long and 79 km (49 mi) wide, Lake Baikal has the largest surface area of any freshwater lake in Asia, at 31,722 km 2 (12,248 sq mi), and is the deepest lake in the world at 1,642 metres (5,387 feet; 898 fathoms).
1 天前 · The M1 Abrams (/ ˈeɪbrəmz /) [ 10 ] is a third-generation American main battle tank designed by Chrysler Defense (now General Dynamics Land Systems) and named for General Creighton Abrams. Conceived for modern armored ground warfare, it is one of the heaviest tanks in service at nearly 73.6 short tons (66.8 metric tons).
3 天前 · Paracetamol (acetaminophen[a]) is a non-opioid analgesic and antipyretic agent used to treat fever and mild to moderate pain.[13][14][15] It is a widely used over-the-counter medication. Common brand names include Tylenol and Panadol. At a standard dose, paracetamol slightly reduces fever;[14][16][17] it is inferior to ibuprofen in that ...
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