Question: Industrialized societies generally follow a clock-based schedule for daily activities that do not change throughout the course of the year. The time of day that individuals begin and end work or school, and the coordination of mass transit, for example, usually remain constant year-round. In contrast, an agrarian society's daily routines for work and personal conduct are more likely governed by the length of daylight hours and by solar time, which change seasonally because of the Earth's axial tilt. North and south of the tropics daylight lasts longer in summer and shorter in winter, the effect becoming greater as one moves away from the tropics.
Is there an answer to this question: What is the tilt of the Earth that causes solar time to change called?

Answer: axial tilt


Question: Hydrogen, as atomic H, is the most abundant chemical element in the universe, making up 75% of normal matter by mass and over 90% by number of atoms (most of the mass of the universe, however, is not in the form of chemical-element type matter, but rather is postulated to occur as yet-undetected forms of mass such as dark matter and dark energy). This element is found in great abundance in stars and gas giant planets. Molecular clouds of H2 are associated with star formation. Hydrogen plays a vital role in powering stars through the proton-proton reaction and the CNO cycle nuclear fusion.
Is there an answer to this question: What percent of atoms is hydrogen?

Answer: 90%


Question: Unlike most other cities, Strasbourg's collections of European art are divided into several museums according not only to type and area, but also to epoch. Old master paintings from the Germanic Rhenish territories and until 1681 are displayed in the Musée de l'Œuvre Notre-Dame, old master paintings from all the rest of Europe (including the Dutch Rhenish territories) and until 1871 as well as old master paintings from the Germanic Rhenish territories between 1681 and 1871 are displayed in the Musée des Beaux-Arts. Old master graphic arts until 1871 is displayed in the Cabinet des estampes et dessins. Decorative arts until 1681 ("German period") are displayed in the Musée de l'Œuvre Notre-Dame, decorative arts from 1681 to 1871 ("French period") are displayed in the Musée des Arts décoratifs. International art (painting, sculpture, graphic arts) and decorative art since 1871 is displayed in the Musée d'art moderne et contemporain. The latter museum also displays the city's photographic library.
Is there an answer to this question: Where are old master paintings from the Germanic Rhenish territories until 1681 held? 

Answer: Musée de l'Œuvre Notre-Dame


Question: During the Allied occupation of Germany after World War II, internal borders were redrawn by the Allied military governments. No single state comprised more than 30% of either population or territory; this was intended to prevent any one state from being as dominant within Germany as Prussia had been in the past. Initially, only seven of the pre-War states remained: Baden (in part), Bavaria (reduced in size), Bremen, Hamburg, Hesse (enlarged), Saxony, and Thuringia. The states with hyphenated names, such as Rhineland-Palatinate, North Rhine-Westphalia, and Saxony-Anhalt, owed their existence to the occupation powers and were created out of mergers of former Prussian provinces and smaller states. Former German territory that lie east of the Oder-Neisse Line fell under either Polish or Soviet administration but attempts were made at least symbolically not to abandon sovereignty well into the 1960s. However, no attempts were made to establish new states in these territories as they lay outside the jurisdiction of West Germany at that time.
Is there an answer to this question: Who redrew internal borders after WW I?

Answer:
unanswerable