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Why is the Sun's corona so much hotter than the Sun's surface? (more unsolved problems in astronomy) The temperature of the photosphere is approximately 6,000 K, whereas the temperature of the corona reaches 1,000,000–2,000,000 K. The high temperature of the corona shows that it is heated by something other than direct heat conduction from the photosphere. It is thought that the energy ...
Google LLC The Google logo used since 2015 Google's headquarters, the Googleplex Formerly Google Inc. (1998–2017) Company type Subsidiary Traded as NASDAQ: GOOGL, GOOG Industry Internet Cloud computing Computer software Computer hardware Artificial intelligence Advertising Founded September 4, 1998 ; 25 years ago (1998-09-04) [a] in Menlo Park, California, United States Founders Larry Page ...
ESPN (an abbreviation of its original name, the Entertainment and Sports Programming Network [2]) is an American international basic cable sports channel owned by The Walt Disney Company (80% and operational control) and Hearst Communications (20%) through the joint venture ESPN Inc. The company was founded in 1979 by Bill Rasmussen, Scott ...
Development XV-15 experimental tiltrotor, 1980 Early concept illustrations of V-22 In the late 20th century VTOL aircraft gained popularity, and many prototype designs were developed, but only one entered service; the Harrier fighter/attack jet used a turbo fan engine. A practical tilt-rotor remained more elusive, until finally in the 1980s the United States moved forward with V-22 design ...
Steam is injected into many oil fields where the oil is thicker and heavier than normal crude oil. This sketch illustrates steam flooding.. Steam injection is an increasingly common method of extracting heavy crude oil.
A tuner for recording off-air television programmes. A clock with timer for unattended recordings. A modulator to allow connection to a normal (for the time) television receiver without audio and video input connectors. The Philips VCR system was marketed only in the U.K., mainland Europe, Australia and South Africa.
Genre (s) Action-adventure. Mode (s) Single-player, multiplayer. Grand Theft Auto V is a 2013 action-adventure game developed by Rockstar North and published by Rockstar Games. It is the seventh main entry in the Grand Theft Auto series, following 2008's Grand Theft Auto IV, and the fifteenth instalment overall.
In 2007, the United Kingdom Government agreed to an overall European Union target of generating 20% of the EU's energy supply from renewable sources by 2020. Each EU member state was given its own allocated target; for the United Kingdom it was 15%.