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At the outset of the Franco-Prussian War, 462,000 German soldiers concentrated on the French frontier while only 270,000 French soldiers could be moved to face them, the French army having lost 100,000 stragglers before a shot was fired through poor planning and administration. This was partly due to the peacetime organisations of the armies. Each Prussian Corps was based within a Kreis (literally "circle") around the chief city in an area. Reservists rarely lived more than a day's travel from their regiment's depot. By contrast, French regiments generally served far from their depots, which in turn were not in the areas of France from which their soldiers were drawn. Reservists often faced several days' journey to report to their depots, and then another long journey to join their regiments. Large numbers of reservists choked railway stations, vainly seeking rations and orders.
What is the literal meaning of the Prussian word "Kreis?"
A: literally "circle"

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In general relativity, a vanishing stress-energy tensor implies, through Einstein field equations, the vanishing of all the components of the Ricci tensor. Vacuum does not mean that the curvature of space-time is necessarily flat: the gravitational field can still produce curvature in a vacuum in the form of tidal forces and gravitational waves (technically, these phenomena are the components of the Weyl tensor). The black hole (with zero electric charge) is an elegant example of a region completely "filled" with vacuum, but still showing a strong curvature.
what produces curvature in a vacuum?
A: tidal forces and gravitational waves

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Popper left school at the age of 16 and attended lectures in mathematics, physics, philosophy, psychology and the history of music as a guest student at the University of Vienna. In 1919, Popper became attracted by Marxism and subsequently joined the Association of Socialist School Students. He also became a member of the Social Democratic Workers' Party of Austria, which was at that time a party that fully adopted the Marxist ideology. After the street battle in the Horlgasse on 15 June 1919, when police shot eight of his unarmed party comrades, he became disillusioned by what he saw to be the "pseudo-scientific" historical materialism of Marx, abandoned the ideology, and remained a supporter of social liberalism throughout his life.
To which political philosophy did Popper continue to adhere after moving away from Marxism?
A: social liberalism

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The Chicago White Stockings, (today's Chicago Cubs), began spring training in Hot Springs, Arkansas in 1886. President Albert Spalding (founder of Spalding Sporting Goods) and player/manager Cap Anson brought their players to Hot Springs and played at the Hot Springs Baseball Grounds. The concept was for the players to have training and fitness before the start of the regular season. After the White Stockings had a successful season in 1886, winning the National League Pennant, other teams began bringing their players to "spring training". The Chicago Cubs, St. Louis Browns, New York Yankees, St. Louis Cardinals, Cleveland Spiders, Detroit Tigers, Pittsburgh Pirates, Cincinnati Reds, New York Highlanders, Brooklyn Dodgers and Boston Red Sox were among the early squads to arrive. Whittington Park (1894) and later Majestic Park (1909) and Fogel Field (1912) were all built in Hot Springs specifically to host Major League teams.
Who began spring training in Hot Springs, Arkansas in 1886?
A:
Chicago White Stockings