Question: What is the answer for the question: What was the full name of the person who attempted to simplify the problem by using the fast neutrons produced by fission? from the following article ? At Birmingham, Oliphant's team had reached a different conclusion. Oliphant had delegated the task to two German refugee scientists, Rudolf Peierls and Otto Frisch, who could not work on Oliphant's radar project because they were enemy aliens and therefore lacked the necessary security clearance. Francis Perrin had calculated the critical mass of uranium to be about 40 tonnes (39 long tons; 44 short tons). He reckoned that if a neutron reflector were placed around it, this might be reduced to 12 tonnes (12 long tons; 13 short tons). Peierls attempted to simplify the problem by using the fast neutrons produced by fission, thus omitting consideration of moderator. He too calculated the critical mass of a sphere of uranium in a theoretical paper written in 1939 to be "of the order of tons".Peierls knew the importance of the size of the critical mass that would allow a chain reaction to take place and its practical significance. In the interior of a critical mass sphere, neutrons are spontaneously produced by the fissionable material. A very small portion of these neutrons are colliding with other nuclei, while a larger portion of the neutrons are escaping through the surface of the sphere. Peierls calculated the equilibrium of the system, where the number of neutrons being produced equalled the number escaping.Niels Bohr had theorised that the rare uranium-235 isotope, which makes up only about 0.7% of natural uranium, was primarily responsible for fission with fast neutrons, although this was not yet universally accepted. Frisch and Peierls were thus able to revise their initial estimate of critical mass needed for nuclear fission in uranium to be substantially less than previously assumed. They estimated a metallic sphere of uranium-235 with a radius of 2.1 centimetres (0.83 in) could suffice. This amount represented approximately 1 kilogram (2.2 lb) of uranium-235. These results led to the FrischPeierls memorandum, which was the initial step in the development of the nuclear arms programme in Britain. This...
Answer: Rudolf Peierls
[Q]: What is the answer for the question: What is the first name of the person who considered Carlo Conti Rossini's 1928 Storia d'Etiopia a groundbreaking work in Ethiopian Studies? from the following article ? Ethiopian historians such as Taddesse Tamrat (19352013) and Sergew Hable Sellassie have argued that modern Ethiopian studies were an invention of the 17th century and originated in Europe. Tamrat considered Carlo Conti Rossini's 1928 Storia d'Etiopia a groundbreaking work in Ethiopian studies. The philosopher Messay Kebede likewise acknowledged the genuine contributions of Western scholars to the understanding of Ethiopia's past. But he also criticized the perceived scientific and institutional bias that he found to be pervasive in Ethiopian-, African-, and Western-made historiographies on Ethiopia. Specifically, Kebede took umbrage at E. A. Wallis Budge's translation of the Kebra Nagast, arguing that Budge had assigned a South Arabian origin to the Queen of Sheba although the Kebra Nagast itself did not indicate such a provenience for this fabled ruler. According to Kebede, a South Arabian extraction was contradicted by biblical exegetes and testimonies from ancient historians, which instead indicated that the Queen was of African origin. Additionally, he chided Budge and Ullendorff for their postulation that the Aksumite civilization was founded by Semitic immigrants from South Arabia. Kebede argued that there is little physical difference between the Semitic-speaking populations in Ethiopia and neighboring Cushitic-speaking groups to validate the notion that the former groups were essentially descendants of South Arabian settlers, with a separate ancestral origin from other local Afroasiatic-speaking populations. He also observed that these Afroasiatic-speaking populations were heterogeneous, having interbred with each other and also assimilated alien elements of both uncertain extraction and negroid origin.
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[A]: Taddesse
input: Please answer the following: What is the answer for the question: What is the last name of the person that the woman who Spencer had an affair with run from? from the following article ? Ray Dolezal, a bored Torrance County Deputy Sheriff, is called to the scene of an apparent suicide in the desert. Alongside the body of Bob Spencer is a suitcase containing $500,000. During the autopsy, they find a digested piece of paper with a phone number; Dolezal, posing as Spencer, calls the number and goes to a meeting, where he is robbed and instructed to meet Gorman Lennox at a restaurant. FBI agent Greg Meeker intercepts Dolezal and informs him that Spencer was an undercover agent. Now that Dolezal has lost the money, Meeker suggests he continue posing as Spencer to recover the money or help arrest Lennox. Dolezal meets Lennox and his wealthy associate Lane Bodine and learns the money is intended for the purchase of unused military weaponry to arm left-wing freedom fighters in South America. The arms dealers demo the guns for Dolezal and Lennox, but demand an additional $250,000 due to unforeseen expenses; Meeker, unwilling to provide more money, pushes the responsibility on Dolezal, who romances his way into Lane's life so she will attract rich humanitarian donors to fund the deal. Meanwhile, two FBI internal affairs agents suspect Dolezal of killing Spencer and stealing the money. Dolezal is forced to admit to Lane he is not really Spencer, but she agrees to help raise the money because she finds Dolezal a better alternative to the volatile Lennox. Dolezal learns from Noreen, who had an affair with the real Spencer, that he was working with an FBI agent who likely killed him. Noreen runs away at the sight of Meeker and the internal affairs agents grab Dolezal. Lennox runs the agents off the road; Dolezal flees and returns to Lane. He discovers Noreen shot dead and a Polaroid of her with Spencer and Meeker.
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output: Meeker
input: Please answer the following: What is the answer for the question: What is the last name of the person who spends the family's savings to buy his own circus? from the following article ? Jack Griffith, known as "Papa" to all, is a family man in a Texas town, but an irresponsibly eccentric one when he has had a drink too many. To impress his six-year-old daughter Corinne, he spends the family's savings to buy his own circus, simply so the little girl can have her own pony. His elder daughter Augusta becomes distraught as her father makes some questionable business deals under the influence of alcohol. This causes strife within the Griffith household and makes her beau's father (the local bank president) forbid his son to associate with the Griffith family. After his squandering leaves the Griffiths in debt, wife Ambolyn packs up Augusta and Corinne and moves to Texarkana, Texas, where her father, Anthony Ghio, is the mayor. Griffith attempts to use his circus to help Ghio's bid for reelection, but accidentally causes Ambolyn to end up with a broken hand. Despondent, he leaves for Louisiana and is little seen or heard from by the family. Talked into an attempt at reconciliation, Papa is reluctant, believing the Griffiths want nothing more to do with him, but he is welcomed back with open arms.
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output:
Griffith