Problem: Antarctica:

During the Cambrian period, Gondwana had a mild climate. West Antarctica was partially in the Northern Hemisphere, and during this period large amounts of sandstones, limestones and shales were deposited. East Antarctica was at the equator, where sea floor invertebrates and trilobites flourished in the tropical seas. By the start of the Devonian period (416 Ma), Gondwana was in more southern latitudes and the climate was cooler, though fossils of land plants are known from this time. Sand and silts were laid down in what is now the Ellsworth, Horlick and Pensacola Mountains. Glaciation began at the end of the Devonian period (360 Ma), as Gondwana became centered on the South Pole and the climate cooled, though flora remained. During the Permian period, the land became dominated by seed plants such as Glossopteris, a pteridosperm which grew in swamps. Over time these swamps became deposits of coal in the Transantarctic Mountains. Towards the end of the Permian period, continued warming led to a dry, hot climate over much of Gondwana.

What part of Antarctica is currently in the Northern Hemispher?
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A: unanswerable


Problem: In recent years there was a high demand for massively distributed databases with high partition tolerance but according to the CAP theorem it is impossible for a distributed system to simultaneously provide consistency, availability and partition tolerance guarantees. A distributed system can satisfy any two of these guarantees at the same time, but not all three. For that reason many NoSQL databases are using what is called eventual consistency to provide both availability and partition tolerance guarantees with a reduced level of data consistency.
What explains the difficulty in a system containing availability, consistency, and partition tolerance guarantees?
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Answer: the CAP theorem


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The combined business is expected to address the markets for scale-out architecture, converged infrastructure and private cloud computing, playing to the strengths of both EMC and Dell. Commentators have questioned the deal, with FBR Capital Markets saying that though it makes a "ton of sense" for Dell, it's a "nightmare scenario that would lack strategic synergies" for EMC. Fortune said there was a lot for Dell to like in EMC's portfolio, but "does it all add up enough to justify tens of billions of dollars for the entire package? Probably not." The Register reported the view of William Blair & Company that the merger would "blow up the current IT chess board", forcing other IT infrastructure vendors to restructure to achieve scale and vertical integration. The value of VMware stock fell 10% after the announcement, valuing the deal at around $63–64bn rather than the $67bn originally reported.
What was the original valuation of the merger?
A: $67bn


Context and question: When an electromagnetic wave strikes a plane surface such as the ground, part of the wave is transmitted into the ground and part of it is reflected, according to the Fresnel coefficients. If the ground is a very good conductor then almost all of the wave is reflected (180° out of phase), whereas a ground modeled as a (lossy) dielectric can absorb a large amount of the wave's power. The power remaining in the reflected wave, and the phase shift upon reflection, strongly depend on the wave's angle of incidence and polarization. The dielectric constant and conductivity (or simply the complex dielectric constant) is dependent on the soil type and is a function of frequency.
what is reflected and transmitted into the ground when a plane surface is struck?
Answer: electromagnetic wave


Question: However loss resistance will generally affect the feedpoint impedance, adding to its resistive (real) component. That resistance will consist of the sum of the radiation resistance Rr and the loss resistance Rloss. If an rms current I is delivered to the terminals of an antenna, then a power of I2Rr will be radiated and a power of I2Rloss will be lost as heat. Therefore, the efficiency of an antenna is equal to Rr / (Rr + Rloss). Of course only the total resistance Rr + Rloss can be directly measured.
Is there an answer to this question: What is the single factor that can be precisely measured?

Answer: total resistance


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Even in modern democracies, Freemasonry is sometimes viewed with distrust. In the UK, Masons working in the justice system, such as judges and police officers, were from 1999 to 2009 required to disclose their membership. While a parliamentary inquiry found that there has been no evidence of wrongdoing, it was felt that any potential loyalties Masons might have, based on their vows to support fellow Masons, should be transparent to the public. The policy of requiring a declaration of masonic membership of applicants for judicial office (judges and magistrates) was ended in 2009 by Justice Secretary Jack Straw (who had initiated the requirement in the 1990s). Straw stated that the rule was considered disproportionate, since no impropriety or malpractice had been shown as a result of judges being Freemasons.
Judges and police officers had to disclose their Freemason membership in what years in England?
A:
from 1999 to 2009