Question: The particular contrasts which are phonemic in a language can change over time. At one time, [f] and [v], two sounds that have the same place and manner of articulation and differ in voicing only, were allophones of the same phoneme in English, but later came to belong to separate phonemes. This is one of the main factors of historical change of languages as described in historical linguistics.
Is there an answer to this question: In the past sounds that now belong to separate phonemes were allophones of what kind of phoneme in English?

Answer: the same phoneme

Question: Early human genetic cluster analysis studies were conducted with samples taken from ancestral population groups living at extreme geographic distances from each other. It was thought that such large geographic distances would maximize the genetic variation between the groups sampled in the analysis and thus maximize the probability of finding cluster patterns unique to each group. In light of the historically recent acceleration of human migration (and correspondingly, human gene flow) on a global scale, further studies were conducted to judge the degree to which genetic cluster analysis can pattern ancestrally identified groups as well as geographically separated groups. One such study looked at a large multiethnic population in the United States, and "detected only modest genetic differentiation between different current geographic locales within each race/ethnicity group. Thus, ancient geographic ancestry, which is highly correlated with self-identified race/ethnicityas opposed to current residenceis the major determinant of genetic structure in the U.S. population." (Tang et al. (2005))
Is there an answer to this question: What was thought might maximize the odds of finding unique cluster patterns in groups?

Answer: large geographic distances

Question: After four years on the sidelines, Austria sought another war with France to avenge its recent defeats. Austria could not count on Russian support because the latter was at war with Britain, Sweden, and the Ottoman Empire in 1809. Frederick William of Prussia initially promised to help the Austrians, but reneged before conflict began. A report from the Austrian finance minister suggested that the treasury would run out of money by the middle of 1809 if the large army that the Austrians had formed since the Third Coalition remained mobilized. Although Archduke Charles warned that the Austrians were not ready for another showdown with Napoleon, a stance that landed him in the so-called "peace party," he did not want to see the army demobilized either. On 8 February 1809, the advocates for war finally succeeded when the Imperial Government secretly decided on another confrontation against the French.
Is there an answer to this question: The finance minister of Austria predicted that if the country kept its large army mobilized, the national treasury would be bankrupt by the middle of what year?

Answer: 1809

Question: However, Mathews' frustration with Whitehead's books did not negatively affect his interest. In fact, there were numerous philosophers and theologians at Chicago's Divinity School that perceived the importance of what Whitehead was doing without fully grasping all of the details and implications. In 1927 they invited one of America's only Whitehead experts Henry Nelson Wieman to Chicago to give a lecture explaining Whitehead's thought. Wieman's lecture was so brilliant that he was promptly hired to the faculty and taught there for twenty years, and for at least thirty years afterward Chicago's Divinity School was closely associated with Whitehead's thought.
Is there an answer to this question: Who was frustrated in Whitehead's books but still interested?

Answer:
Mathews