Article: The black-body problem was revisited in 1905, when Rayleigh and Jeans (on the one hand) and Einstein (on the other hand) independently proved that classical electromagnetism could never account for the observed spectrum. These proofs are commonly known as the "ultraviolet catastrophe", a name coined by Paul Ehrenfest in 1911. They contributed greatly (along with Einstein's work on the photoelectric effect) to convincing physicists that Planck's postulate of quantized energy levels was more than a mere mathematical formalism. The very first Solvay Conference in 1911 was devoted to "the theory of radiation and quanta". Max Planck received the 1918 Nobel Prize in Physics "in recognition of the services he rendered to the advancement of Physics by his discovery of energy quanta".

Question: When did Paul Ehrenfest come up with the name "ultraviolet catastrophe"?
Ans: 1911

Here is a question about this article: When the Archbishop of Canterbury, Hubert Walter, died on 13 July 1205, John became involved in a dispute with Pope Innocent III that would lead to the king's excommunication. The Norman and Angevin kings had traditionally exercised a great deal of power over the church within their territories. From the 1040s onwards, however, successive popes had put forward a reforming message that emphasised the importance of the church being "governed more coherently and more hierarchically from the centre" and established "its own sphere of authority and jurisdiction, separate from and independent of that of the lay ruler", in the words of historian Richard Huscroft. After the 1140s, these principles had been largely accepted within the English church, albeit with an element of concern about centralising authority in Rome. These changes brought the customary rights of lay rulers such as John over ecclesiastical appointments into question. Pope Innocent was, according to historian Ralph Turner, an "ambitious and aggressive" religious leader, insistent on his rights and responsibilities within the church.
What is the answer to this question: What lead to the king's excommunication?
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So... a dispute with Pope Innocent III

The problem: Answer a question about this article:
A variety of industries benefit from hunting and support hunting on economic grounds. In Tanzania, it is estimated that a safari hunter spends fifty to one hundred times that of the average ecotourist. While the average photo tourist may seek luxury accommodation, the average safari hunter generally stays in tented camps. Safari hunters are also more likely to use remote areas, uninviting to the typical ecotourist. Advocates argue that these hunters allow for anti-poaching activities and revenue for local communities.[citation needed]
How much does a safari hunter spend compared to an average ecotourist?
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The answer: fifty to one hundred times

Problem: Please answer a question about the following article about Tajikistan:
Freedom of the press is ostensibly officially guaranteed by the government, but independent press outlets remain restricted, as does a substantial amount of web content. According to the Institute for War & Peace Reporting, access is blocked to local and foreign websites including avesta.tj, Tjknews.com, ferghana.ru, centrasia.ru and journalists are often obstructed from reporting on controversial events. In practice, no public criticism of the regime is tolerated and all direct protest is severely suppressed and does not receive coverage in the local media.
What is not covered by local media?
A: all direct protest is severely suppressed

Question: Read this and answer the question

Napoleon instituted lasting reforms, including higher education, a tax code, road and sewer systems, and established the Banque de France, the first central bank in French history. He negotiated the Concordat of 1801 with the Catholic Church, which sought to reconcile the mostly Catholic population to his regime. It was presented alongside the Organic Articles, which regulated public worship in France. His dissolution of the Holy Roman Empire paved the way to German Unification later in the 19th century. The sale of the Louisiana Territory to the United States doubled the size of the country and was a major event in American history.

What did the Organic Articles regulate in France?
Answer: public worship

FETs are further divided into depletion-mode and enhancement-mode types, depending on whether the channel is turned on or off with zero gate-to-source voltage. For enhancement mode, the channel is off at zero bias, and a gate potential can "enhance" the conduction. For the depletion mode, the channel is on at zero bias, and a gate potential (of the opposite polarity) can "deplete" the channel, reducing conduction. For either mode, a more positive gate voltage corresponds to a higher current for n-channel devices and a lower current for p-channel devices. Nearly all JFETs are depletion-mode because the diode junctions would forward bias and conduct if they were enhancement-mode devices; most IGFETs are enhancement-mode types.
How are FET's separated?
depletion-mode and enhancement-mode types