Problem: Capacitor:

In October 1745, Ewald Georg von Kleist of Pomerania, Germany, found that charge could be stored by connecting a high-voltage electrostatic generator by a wire to a volume of water in a hand-held glass jar. Von Kleist's hand and the water acted as conductors, and the jar as a dielectric (although details of the mechanism were incorrectly identified at the time). Von Kleist found that touching the wire resulted in a powerful spark, much more painful than that obtained from an electrostatic machine. The following year, the Dutch physicist Pieter van Musschenbroek invented a similar capacitor, which was named the Leyden jar, after the University of Leiden where he worked. He also was impressed by the power of the shock he received, writing, "I would not take a second shock for the kingdom of France."

Besides the scientist's hand, what other component of the experiment in which the basic properties of capacitors were discovered acted as the second conductor?
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A: the water acted as conductors


Problem: Mary's special position within God's purpose of salvation as "God-bearer" (Theotokos) is recognised in a number of ways by some Anglican Christians. All the member churches of the Anglican Communion affirm in the historic creeds that Jesus was born of the Virgin Mary, and celebrates the feast days of the Presentation of Christ in the Temple. This feast is called in older prayer books the Purification of the Blessed Virgin Mary on February 2. The Annunciation of our Lord to the Blessed Virgin on March 25 was from before the time of Bede until the 18th century New Year's Day in England. The Annunciation is called the "Annunciation of our Lady" in the 1662 Book of Common Prayer. Anglicans also celebrate in the Visitation of the Blessed Virgin on 31 May, though in some provinces the traditional date of July 2 is kept. The feast of the St. Mary the Virgin is observed on the traditional day of the Assumption, August 15. The Nativity of the Blessed Virgin is kept on September 8.
On what date is the Presentation of Christ in the Temple celebrated by Anglicans?
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Answer: February 2


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
After the development of the large London Porter breweries in the 18th century, the trend grew for pubs to become tied houses which could only sell beer from one brewery (a pub not tied in this way was called a Free house). The usual arrangement for a tied house was that the pub was owned by the brewery but rented out to a private individual (landlord) who ran it as a separate business (even though contracted to buy the beer from the brewery). Another very common arrangement was (and is) for the landlord to own the premises (whether freehold or leasehold) independently of the brewer, but then to take a mortgage loan from a brewery, either to finance the purchase of the pub initially, or to refurbish it, and be required as a term of the loan to observe the solus tie.
In what century did the habit arise of pubs selling beer from only one brewery?
A: 18th


Context and question: USB was designed to standardize the connection of computer peripherals (including keyboards, pointing devices, digital cameras, printers, portable media players, disk drives and network adapters) to personal computers, both to communicate and to supply electric power. It has become commonplace on other devices, such as smartphones, PDAs and video game consoles. USB has effectively replaced a variety of earlier interfaces, such as serial and parallel ports, as well as separate power chargers for portable devices.
What has USB effectively replaced?
Answer: a variety of earlier interfaces


Question: Mianyang Hi-Tech Industrial Development Zone was established in 1992, with a planned area of 43 km2 (17 sq mi). The zone is situated 96 kilometers away from Chengdu, and is 8 km (5.0 mi) away from Mianyang Airport. Since its establishment, the zone accumulated 177.4 billion yuan of industrial output, 46.2 billion yuan of gross domestic product, fiscal revenue 6.768 billion yuan. There are more than 136 high-tech enterprises in the zone and they accounted for more than 90% of the total industrial output.
Is there an answer to this question: How many high-tech enterprises are present in Chengdu?

Answer: unanswerable


Later chapters provide evidence that evolution has occurred, supporting the idea of branching, adaptive evolution without directly proving that selection is the mechanism. Darwin presents supporting facts drawn from many disciplines, showing that his theory could explain a myriad of observations from many fields of natural history that were inexplicable under the alternate concept that species had been individually created. The structure of Darwin's argument showed the influence of John Herschel, whose philosophy of science maintained that a mechanism could be called a vera causa (true cause) if three things could be demonstrated: its existence in nature, its ability to produce the effects of interest, and its ability to explain a wide range of observations.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What are the three things John Herschel maintains need to be shown to allow for a mechanism be called a true cause?
Ah, so..
its existence in nature, its ability to produce the effects of interest, and its ability to explain a wide range of observations