Problem: The ethnogenesis of the Greek nation is linked to the development of Pan-Hellenism in the 8th century BC. According to some scholars, the foundational event was the Olympic Games in 776 BC, when the idea of a common Hellenism among the Greek tribes was first translated into a shared cultural experience and Hellenism was primarily a matter of common culture. The works of Homer (i.e. Iliad and Odyssey) and Hesiod (i.e. Theogony) were written in the 8th century BC, becoming the basis of the national religion, ethos, history and mythology. The Oracle of Apollo at Delphi was established in this period.
When did this event occur ?
The answer is the following: development of Pan-Hellenism in the 8th century BC.

Problem: A P-N junction can convert absorbed light energy into a proportional electric current. The same process is reversed here (i.e. the P-N junction emits light when electrical energy is applied to it). This phenomenon is generally called electroluminescence, which can be defined as the emission of light from a semi-conductor under the influence of an electric field. The charge carriers recombine in a forward-biased P-N junction as the electrons cross from the N-region and recombine with the holes existing in the P-region. Free electrons are in the conduction band of energy levels, while holes are in the valence energy band. Thus the energy level of the holes will be lesser than the energy levels of the electrons. Some portion of the energy must be dissipated in order to recombine the electrons and the holes. This energy is emitted in the form of heat and light.
Whose energy levels are lower than the electrons in the electroluminescence process?
The answer is the following: holes existing in the P-region

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.
During his attendance to von Mises' seminars, who did Hayek become friends with?
The answer is the following: Eric Voegelin

Problem: On May 11, 2000, Glenallen Hill, facing Brewers starter Steve Woodard, became the first, and thus far only player, to hit a pitched ball onto the roof of a five-story residential building across Waveland Ave, beyond Wrigley Field's left field wall. The shot was estimated at well over 500 feet (150 m), but the Cubs fell to Milwaukee 128. No batted ball has ever hit the center field scoreboard, although the original "Slammin' Sammy", golfer Sam Snead, hit it with a golf ball in an exhibition in the 1950s. In 1948, Bill Nicholson barely missed the scoreboard when he launched a home run ball onto Sheffield Avenue and in 1959, Roberto Clemente came even closer with a home run ball hit onto Waveland Avenue. In 2001, a Sammy Sosa shot landed across Waveland and bounced a block down Kenmore Avenue. Dave Kingman hit a shot in 1979 that hit the third porch roof on the east side of Kenmore, estimated at 555 feet (169 m), and is regarded as the longest home run in Wrigley Field history. On May 26, 2015, the Cubs rookie third baseman, Kris Bryant, hit a homerun that traveled an estimated 477 feet (145 m) off the park's new videoboard in left field. Later the same year, he hit a homer that traveled 495 feet (151 m) that also ricocheted off of the videoboard On October 13, 2015, Kyle Schwarber's 438-foot home run landed on the equally new right field videoboard.
When did the first and only player to hit a pitched ball onto the roof of a five-story building across Waveland Ave?
The answer is the following:
May 11, 2000