Problem: Please answer a question about the following article about Railway electrification system:
DC commutating electric motors, if fitted with laminated pole pieces, become universal motors because they can also operate on AC; reversing the current in both stator and rotor does not reverse the motor. But the now-standard AC distribution frequencies of 50 and 60 Hz caused difficulties with inductive reactance and eddy current losses. Many railways chose low AC frequencies to overcome these problems. They must be converted from utility power by motor-generators or static inverters at the feeding substations or generated at dedicated traction powerstations.
What problems did AC distribution cause?
A: inductive reactance and eddy current losses
Problem: Please answer a question about the following article about Hunting:
New Zealand has a strong hunting culture. The islands making up New Zealand originally had no land mammals apart from bats. However, once Europeans arrived, game animals were introduced by acclimatisation societies to provide New Zealanders with sport and a hunting resource. Deer, pigs, goats, rabbits, hare, tahr and chamois all adapted well to the New Zealand terrain, and with no natural predators, their population exploded. Government agencies view the animals as pests due to their effects on the natural environment and on agricultural production, but hunters view them as a resource.
What were the the only land mammal in New Zealand?
A: bats
Problem: Please answer a question about the following article about Madrasa:
There is disagreement whether madaris ever became universities. Scholars like Arnold H. Green and Seyyed Hossein Nasr have argued that starting in the 10th century, some medieval Islamic madaris indeed became universities. George Makdisi and others, however, argue that the European university has no parallel in the medieval Islamic world. Darleen Pryds questions this view, pointing out that madaris and European universities in the Mediterranean region shared similar foundations by princely patrons and were intended to provide loyal administrators to further the rulers' agenda. Other scholars regard the university as uniquely European in origin and characteristics.
What class of people founded both European universities and Islamic madaris
A: princely patrons
Problem: Please answer a question about the following article about New York City:
Christianity (59%), particularly Catholicism (33%), was the most prevalently practiced religion in New York as of 2014, followed by Judaism, with approximately 1.1 million Jews in New York City, over half living in Brooklyn. Islam ranks third in New York City, with official estimates ranging between 600,000 and 1,000,000 observers and including 10% of the city's public schoolchildren, followed by Hinduism, Buddhism, and a variety of other religions, as well as atheism. In 2014, 24% self-identified with no organized religious affiliation.
What percentage of people in 2014 had no religion?
A:
24