Question: The Gregorian calendar was a reform of the Julian calendar instituted in 1582 by Pope Gregory XIII, after whom the calendar was named, by papal bull Inter gravissimas dated 24 February 1582. The motivation for the adjustment was to bring the date for the celebration of Easter to the time of year in which it was celebrated when it was introduced by the early Church. Although a recommendation of the First Council of Nicaea in 325 specified that all Christians should celebrate Easter on the same day, it took almost five centuries before virtually all Christians achieved that objective by adopting the rules of the Church of Alexandria (see Easter for the issues which arose).
Try to answer this question if possible: Which Pope started the Julian calendar?
Answer: unanswerable
Question: Jehovah's Witnesses believe their highest allegiance belongs to God's kingdom, which is viewed as an actual government in heaven, with Christ as king. They remain politically neutral, do not seek public office, and are discouraged from voting, though individual members may participate in uncontroversial community improvement issues. Although they do not take part in politics, they respect the authority of the governments under which they live. They do not celebrate religious holidays such as Christmas and Easter, nor do they observe birthdays, nationalistic holidays, or other celebrations they consider to honor people other than Jesus. They feel that these and many other customs have pagan origins or reflect a nationalistic or political spirit. Their position is that these traditional holidays reflect Satan's control over the world. Witnesses are told that spontaneous giving at other times can help their children to not feel deprived of birthdays or other celebrations.
Try to answer this question if possible: What Protestant group encourages their members to celebrate Easter?
Answer: unanswerable
Question: In the United States, August Vollmer introduced other reforms, including education requirements for police officers. O.W. Wilson, a student of Vollmer, helped reduce corruption and introduce professionalism in Wichita, Kansas, and later in the Chicago Police Department. Strategies employed by O.W. Wilson included rotating officers from community to community to reduce their vulnerability to corruption, establishing of a non-partisan police board to help govern the police force, a strict merit system for promotions within the department, and an aggressive recruiting drive with higher police salaries to attract professionally qualified officers. During the professionalism era of policing, law enforcement agencies concentrated on dealing with felonies and other serious crime, rather than broader focus on crime prevention.
Try to answer this question if possible: Who introduced education requirements for US police?
Answer: August Vollmer
Question: Modern electrification systems take AC energy from a power grid which is delivered to a locomotive and converted to a DC voltage to be used by traction motors. These motors may either be DC motors which directly use the DC or they may be 3-phase AC motors which require further conversion of the DC to 3-phase AC (using power electronics). Thus both systems are faced with the same task: converting and transporting high-voltage AC from the power grid to low-voltage DC in the locomotive. Where should this conversion take place and at what voltage and current (AC or DC) should the power flow to the locomotive? And how does all this relate to energy-efficiency? Both the transmission and conversion of electric energy involve losses: ohmic losses in wires and power electronics, magnetic field losses in transformers and smoothing reactors (inductors). Power conversion for a DC system takes place mainly in a railway substation where large, heavy, and more efficient hardware can be used as compared to an AC system where conversion takes place aboard the locomotive where space is limited and losses are significantly higher. Also, the energy used to blow air to cool transformers, power electronics (including rectifiers), and other conversion hardware must be accounted for.
Try to answer this question if possible: What nowdays electrification systems can use?
Answer:
DC motors which directly use the DC or they may be 3-phase AC motors