Problem: In the first major change to the judging panel, a fourth judge, Kara DioGuardi, was introduced. This was also the first season without executive producer Nigel Lythgoe who left to focus on the international versions of his show So You Think You Can Dance. The Hollywood round was moved to the Kodak Theatre for 2009 and was also extended to two weeks. Idol Gives Back was canceled for this season due to the global recession at the time.
Why did American Idol choose not to have its Idol Gives Back special in 2009?
The answer is the following: the global recession

Problem: Science came to play a leading role in Enlightenment discourse and thought. Many Enlightenment writers and thinkers had backgrounds in the sciences and associated scientific advancement with the overthrow of religion and traditional authority in favour of the development of free speech and thought. Scientific progress during the Enlightenment included the discovery of carbon dioxide (fixed air) by the chemist Joseph Black, the argument for deep time by the geologist James Hutton, and the invention of the steam engine by James Watt. The experiments of Lavoisier were used to create the first modern chemical plants in Paris, and the experiments of the Montgolfier Brothers enabled them to launch the first manned flight in a hot-air balloon on 21 November 1783, from the Château de la Muette, near the Bois de Boulogne.
Who launched the first manned flight in a hot-air balloon in November 1783?
The answer is the following: the Montgolfier Brothers

Problem: Initially sympathetic to Wieser's democratic socialism, Hayek's economic thinking shifted away from socialism and toward the classical liberalism of Carl Menger after reading von Mises' book Socialism. It was sometime after reading Socialism that Hayek began attending von Mises' private seminars, joining several of his university friends, including Fritz Machlup, Alfred Schutz, Felix Kaufmann, and Gottfried Haberler, who were also participating in Hayek's own, more general, private seminar. It was during this time that he also encountered and befriended noted political philosopher Eric Voegelin, with whom he retained a long-standing relationship.
What viewpoint did the book Socialism shift Hayek toward?
The answer is the following: classical liberalism

Problem: The Canadian football field is 150 yards (137 m) long and 65 yards (59 m) wide with end zones 20 yards (18 m) deep, and goal lines 110 yards (101 m) apart. At each goal line is a set of 40-foot-high (12 m) goalposts, which consist of two uprights joined by an 18 1⁄2-foot-long (5.6 m) crossbar which is 10 feet (3 m) above the goal line. The goalposts may be H-shaped (both posts fixed in the ground) although in the higher-calibre competitions the tuning-fork design (supported by a single curved post behind the goal line, so that each post starts 10 feet (3 m) above the ground) is preferred. The sides of the field are marked by white sidelines, the goal line is marked in white, and white lines are drawn laterally across the field every 5 yards (4.6 m) from the goal line. These lateral lines are called "yard lines" and often marked with the distance in yards from and an arrow pointed toward the nearest goal line. In previous decades, arrows were not used and every yard line was usually marked with the distance to the goal line, including the goal line itself which was marked with a "0"; in most stadiums today, the 10-, 20-, 30-, 40-, and 50-yard lines are marked with numbers, with the goal line sometimes being marked with a "G". The centre (55-yard) line usually is marked with a "C". "Hash marks" are painted in white, parallel to the yardage lines, at 1 yard (0.9 m) intervals, 24 yards (21.9 m) from the sidelines. On fields that have a surrounding running track, such as Commonwealth Stadium, Molson Stadium, and many universities, the end zones are often cut off in the corners to accommodate the track. In 2014, Edmonton placed turf over the track to create full end zones. This was particularly common among U.S.-based teams during the CFL's American expansion, where few American stadiums were able to accommodate the much longer and noticeably wider CFL field.
How long in meters is the crossbar of a Canadian football goal?
The answer is the following:
5.6