Problem: Green:

In the subtractive color system, used in painting and color printing, green is created by a combination of yellow and blue, or yellow and cyan; in the RGB color model, used on television and computer screens, it is one of the additive primary colors, along with red and blue, which are mixed in different combinations to create all other colors. On the HSV color wheel, also known as the RGB color wheel, the complement of green is magenta; that is, a color corresponding to an equal mixture of red and blue light (one of the purples). On a traditional color wheel, based on subtractive color, the complementary color to green is considered to be red.

What color model is used in a subtractive system?
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A: unanswerable


Problem: Norfolk Island was colonised by East Polynesians but was long unpeopled when it was settled by Great Britain as part of its settlement of Australia from 1788. The island served as a convict penal settlement from 6 March 1788 until 5 May 1855, except for an 11-year hiatus between 15 February 1814 and 6 June 1825, when it lay abandoned. On 8 June 1856, permanent civilian residence on the island began when it was settled from Pitcairn Island. In 1913, the UK handed Norfolk over to Australia to administer as an external territory.
Where did the first permanent civilians of Norfolk Island settle from in 1856?
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Answer: Pitcairn Island


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Chapter IX deals with the fact that the geologic record appears to show forms of life suddenly arising, without the innumerable transitional fossils expected from gradual changes. Darwin borrowed Charles Lyell's argument in Principles of Geology that the record is extremely imperfect as fossilisation is a very rare occurrence, spread over vast periods of time; since few areas had been geologically explored, there could only be fragmentary knowledge of geological formations, and fossil collections were very poor. Evolved local varieties which migrated into a wider area would seem to be the sudden appearance of a new species. Darwin did not expect to be able to reconstruct evolutionary history, but continuing discoveries gave him well founded hope that new finds would occasionally reveal transitional forms. To show that there had been enough time for natural selection to work slowly, he again cited Principles of Geology and other observations based on sedimentation and erosion, including an estimate that erosion of The Weald had taken 300 million years. The initial appearance of entire groups of well developed organisms in the oldest fossil-bearing layers, now known as the Cambrian explosion, posed a problem. Darwin had no doubt that earlier seas had swarmed with living creatures, but stated that he had no satisfactory explanation for the lack of fossils. Fossil evidence of pre-Cambrian life has since been found, extending the history of life back for billions of years.
Which book written by Charles Lyell contains the argument that fossils are too rare to be used as proof of life suddenly arising?
A: Principles of Geology


Context and question: The archipelago is formed by high points on the rim of the caldera of a submarine volcano that forms a seamount. The volcano is one part of a range that was formed as part of the same process that formed the floor of the Atlantic, and the Mid-Atlantic Ridge. The top of the seamount has gone through periods of complete submergence, during which its limestone cap was formed by marine organisms, and during the Ice Ages the entire caldera was above sea level, forming an island of approximately two hundred square miles.
During the ice age, what area of land was above water?
Answer: approximately two hundred square miles


Question: Because of its simple atomic structure, consisting only of a proton and an electron, the hydrogen atom, together with the spectrum of light produced from it or absorbed by it, has been central to the development of the theory of atomic structure. Furthermore, the corresponding simplicity of the hydrogen molecule and the corresponding cation H+
2 allowed fuller understanding of the nature of the chemical bond, which followed shortly after the quantum mechanical treatment of the hydrogen atom had been developed in the mid-1920s.
Is there an answer to this question: What is the hydrogen atom made up of?

Answer: a proton and an electron


Problem: Wayback Machine:

After August 2008 sites had to be listed on the Open Directory in order to be included. According to Jeff Kaplan of the Internet Archive in November 2010, other sites were still being archived, but more recent captures would become visible only after the next major indexing, an infrequent operation.

When did it become a requirement for websites to appear on Open Directory for inclusion in Kaplan?
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A:
unanswerable