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23 godz. temu · Development and production Origins Supermarine Type 224 In 1931, the Air Ministry released specification F7/30, calling for a modern fighter capable of a flying speed of 250 mph (400 km/h) to replace the Gloster Gauntlet biplane. R. J. Mitchell designed the Supermarine Type 224 to fill this role. The 224 was an open-cockpit monoplane with bulky gull wings and a large, fixed, spatted ...
23 godz. temu · Apollo 8 (December 21–27, 1968) was the first crewed spacecraft to leave low Earth orbit and the first human spaceflight to reach the Moon.The crew orbited the Moon ten times without landing, and then departed safely back to Earth. These three astronauts—Frank Borman, James Lovell, and William Anders—were the first humans to witness and photograph the far side of the Moon and an Earthrise.
23 godz. temu · The McDonnell Douglas (now Boeing) F-15E Strike Eagle is an American all-weather multirole strike fighter derived from the McDonnell Douglas F-15 Eagle.The F-15E was designed in the 1980s for long-range, high-speed interdiction without relying on escort or electronic-warfare aircraft. United States Air Force (USAF) F-15E Strike Eagles can be generally distinguished from other US Eagle variants ...
23 godz. temu · 10 6: mega-(MJ) 1×10 6 J: Kinetic energy of a 2 tonne vehicle at 32 metres per second (115 km/h or 72 mph): 1.2×10 6 J: Approximate food energy of a snack such as a Snickers bar (280 food calories): 3.6×10 6 J = 1 kWh (kilowatt-hour) (used for electricity) 4.2×10 6 J: Energy released by explosion of 1 kilogram of TNT: 8.4×10 6 J: Recommended food energy intake per day for a moderately ...
23 godz. temu · Fusing four free protons (hydrogen nuclei) into a single ... and the density to only 0.2 g/m 3 (about 1/10,000 the density of air at sea level, and 1 millionth that of the inner layer of ... Venus, and the Sun. Careful observations of the 1769 transit of Venus allowed astronomers to calculate the average Earth–Sun distance as 93,726,900 ...
23 godz. temu · The metre (or meter in US spelling; symbol: m) is the base unit of length in the International System of Units (SI). Since 2019, the metre has been defined as the length of the path travelled by light in vacuum during a time interval of 1 / 299 792 458 of a second, where the second is defined by a hyperfine transition frequency of caesium.. The metre was originally defined in 1791 by the ...
23 godz. temu · Four modern aircraft carriers of various types— USS John C. Stennis, Charles de Gaulle (French Navy), USS John F. Kennedy, helicopter carrier HMS Ocean —and escort vessels, 2002. An aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and facilities for carrying, arming, deploying, and ...
