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3 天前 · 1969–1991. Number built. 712. The Grumman F-14 Tomcat is an American carrier-capable supersonic, twin-engine, two-seat, twin-tail, all-weather-capable variable-sweep wing fighter aircraft. The Tomcat was developed for the United States Navy 's Naval Fighter Experimental (VFX) program after the collapse of the General Dynamics-Grumman F-111B ...
- 21 December 1970
- 1969–1991
- 712
- Grumman
1 天前 · The Northrop Grumman B-2 Spirit, also known as the Stealth Bomber, is an American heavy strategic bomber, featuring low-observable stealth technology designed to penetrate dense anti-aircraft defenses.A subsonic flying wing with a crew of two, the plane was designed by Northrop (later Northrop Grumman) as the prime contractor, with Boeing, Hughes, and Vought as principle subcontractors, and ...
- 17 July 1989; 34 years ago
- 1987–2000
- 21
3 天前 · Classification. ALS is a motor neuron disease, which is a group of neurological disorders that selectively affect motor neurons, the cells that control voluntary muscles of the body. [3] Other motor neuron diseases include primary lateral sclerosis (PLS), progressive muscular atrophy (PMA), progressive bulbar palsy, pseudobulbar palsy, and ...
- Unknown (about 85%), genetic (about 15%)
- Neurology
- 45–75 years
1 天前 · Methicillin-resistant Staphylococcus aureus (MRSA, often pronounced / ˈmɜːrsə / or / ɛm ɑːr ɛs eɪ / ), is one of a number of greatly feared strains of S. aureus which have become resistant to most β-lactam antibiotics. For this reason, vancomycin, a glycopeptide antibiotic, is commonly used to combat MRSA.
3 天前 · The Metropolitan Museum of Art, colloquially referred to as the Met,[a] is an encyclopedic art museum in New York City. It is the largest art museum in the Americas and the fourth-largest in the world. With 5.36 million visitors in 2023, it is the most-visited museum in the United States and the fourth-most visited art museum in the world.[6 ...
1 天前 · The Battle of Stalingrad[Note 8] (17 July 1942 – 2 February 1943)[27][28][29][30] occurred on the Eastern Front of World War II, beginning when Nazi Germany and its Axis allies attacked and became locked in a protracted struggle with the Soviet Union for control over the Soviet city of Stalingrad in what is now southern Russia. The battle ...
3 天前 · Canonical commutation rule for position q and momentum p variables of a particle, 1927. pq − qp = h / (2 πi ). Uncertainty principle of Heisenberg, 1927. The uncertainty principle, also known as Heisenberg's indeterminacy principle, is a fundamental concept in quantum mechanics. It states that there is a limit to the precision with which ...
