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The Scheinergrade (Sch.) system was devised by the German astronomer Julius Scheiner (1858–1913) in 1894 originally as a method of comparing the speeds of plates used for astronomical photography. Scheiner's system rated the speed of a plate by the least exposure to produce a visible darkening upon development. Speed was expressed in degrees Scheiner, originally ranging from 1° Sch. to 20° Sch., where an increment of 19° Sch. corresponded to a hundredfold increase in sensitivity, which meant that an increment of 3° Sch. came close to a doubling of sensitivity.

What is the range of Scheiner speeds?
Answer: from 1° Sch. to 20° Sch
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Though women were protected by late Sumerian law and were able to achieve a higher status in Sumer than in other contemporary civilizations, the culture was male-dominated. The Code of Ur-Nammu, the oldest such codification yet discovered, dating to the Ur-III "Sumerian Renaissance", reveals a glimpse at societal structure in late Sumerian law. Beneath the lu-gal ("great man" or king), all members of society belonged to one of two basic strata: The "lu" or free person, and the slave (male, arad; female geme). The son of a lu was called a dumu-nita until he married. A woman (munus) went from being a daughter (dumu-mi), to a wife (dam), then if she outlived her husband, a widow (numasu) and she could then remarry.

Whose code reveals a bit about the societal structure through Sumerian law?
Answer: Ur-Nammu
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The Tito-Stalin split had large ramifications for countries outside the USSR and Yugoslavia. It has, for example, been given as one of the reasons for the Slánský trial in Czechoslovakia, in which 14 high-level Communist officials were purged, with 11 of them being executed. Stalin put pressure on Czechoslovakia to conduct purges in order to discourage the spread of the idea of a "national path to socialism," which Tito espoused.

How many Communists were executed at the Slansky trial?
Answer:
11