Question: Mach argued that, in effect, the water experiment in an otherwise empty universe would remain flat. But if another object were introduced into this universe, perhaps a distant star, there would now be something relative to which the bucket could be seen as rotating. The water inside the bucket could possibly have a slight curve. To account for the curve that we observe, an increase in the number of objects in the universe also increases the curvature in the water. Mach argued that the momentum of an object, whether angular or linear, exists as a result of the sum of the effects of other objects in the universe (Mach's Principle).
Is there an answer to this question: What principle argues that the momentum of an object is independent of other objects in the universe?

Answer: unanswerable


Question: During the 1950s and 1960s, FBI officials became increasingly concerned about the influence of civil rights leaders, whom they believed had communist ties or were unduly influenced by them. In 1956, for example, Hoover sent an open letter denouncing Dr. T.R.M. Howard, a civil rights leader, surgeon, and wealthy entrepreneur in Mississippi who had criticized FBI inaction in solving recent murders of George W. Lee, Emmett Till, and other blacks in the South. The FBI carried out controversial domestic surveillance in an operation it called the COINTELPRO, which was short for "COunter-INTELligence PROgram." It was to investigate and disrupt the activities of dissident political organizations within the United States, including both militant and non-violent organizations. Among its targets was the Southern Christian Leadership Conference, a leading civil rights organization with clergy leadership.
Is there an answer to this question: Who did Hoover send an open letter denouncing?

Answer: Dr. T.R.M. Howard


Question: Beyoncé's vocal range spans four octaves. Jody Rosen highlights her tone and timbre as particularly distinctive, describing her voice as "one of the most compelling instruments in popular music". While another critic says she is a "Vocal acrobat, being able to sing long and complex melismas and vocal runs effortlessly, and in key. Her vocal abilities mean she is identified as the centerpiece of Destiny's Child. The Daily Mail calls Beyoncé's voice "versatile", capable of exploring power ballads, soul, rock belting, operatic flourishes, and hip hop. Jon Pareles of The New York Times commented that her voice is "velvety yet tart, with an insistent flutter and reserves of soul belting". Rosen notes that the hip hop era highly influenced Beyoncé's strange rhythmic vocal style, but also finds her quite traditionalist in her use of balladry, gospel and falsetto. Other critics praise her range and power, with Chris Richards of The Washington Post saying she was "capable of punctuating any beat with goose-bump-inducing whispers or full-bore diva-roars."
Is there an answer to this question: What does Jody Rosen say influenced Beyoncé's vocal style?

Answer: the hip hop era


Question: The calabash is the primary musical instrument of Guinea-Bissau, and is used in extremely swift and rhythmically complex dance music. Lyrics are almost always in Guinea-Bissau Creole, a Portuguese-based creole language, and are often humorous and topical, revolving around current events and controversies, especially AIDS.
Is there an answer to this question: What is the primary instrument of Guinea-Bissau?

Answer:
The calabash