Question: Stars, planets, and moons keep their atmospheres by gravitational attraction, and as such, atmospheres have no clearly delineated boundary: the density of atmospheric gas simply decreases with distance from the object. The Earth's atmospheric pressure drops to about 6998320000000000000♠3.2×10−2 Pa at 100 kilometres (62 mi) of altitude, the Kármán line, which is a common definition of the boundary with outer space. Beyond this line, isotropic gas pressure rapidly becomes insignificant when compared to radiation pressure from the Sun and the dynamic pressure of the solar winds, so the definition of pressure becomes difficult to interpret. The thermosphere in this range has large gradients of pressure, temperature and composition, and varies greatly due to space weather. Astrophysicists prefer to use number density to describe these environments, in units of particles per cubic centimetre.
Try to answer this question if possible: What does the Sun's atmospheric pressure drop to at 100 km of altitude?
Answer: unanswerable
Question: Ann Arbor's residential neighborhoods contain architectural styles ranging from classic 19th-century and early-20th-century designs to ranch-style houses. Among these homes are a number of kit houses built in the early 20th century. Contemporary-style houses are farther from the downtown district. Surrounding the University of Michigan campus are houses and apartment complexes occupied primarily by student renters. Tower Plaza, a 26-story condominium building located between the University of Michigan campus and downtown, is the tallest building in Ann Arbor. The 19th-century buildings and streetscape of the Old West Side neighborhood have been preserved virtually intact; in 1972, the district was listed on the National Register of Historic Places, and it is further protected by city ordinances and a nonprofit preservation group.
Try to answer this question if possible: When was the city listed on the National Register of historic Places?
Answer: 1972
Question: At various times, there have been cardinals who had only received first tonsure and minor orders but not yet been ordained as deacons or priests. Though clerics, they were inaccurately called "lay cardinals" and were permitted to marry. Teodolfo Mertel was among the last of the lay cardinals. When he died in 1899 he was the last surviving cardinal who was not at least ordained a priest. With the revision of the Code of Canon Law promulgated in 1917 by Pope Benedict XV, only those who are already priests or bishops may be appointed cardinals. Since the time of Pope John XXIII a priest who is appointed a cardinal must be consecrated a bishop, unless he obtains a dispensation.
Try to answer this question if possible: What was a "lay cardinal" allowed to do that is not considered a normal status of a Cardinal?
Answer: marry
Question: As of 2010, those of (non-Hispanic white) European ancestry accounted for 57.9% of Florida's population. Out of the 57.9%, the largest groups were 12.0% German (2,212,391), 10.7% Irish (1,979,058), 8.8% English (1,629,832), 6.6% Italian (1,215,242), 2.8% Polish (511,229), and 2.7% French (504,641). White Americans of all European backgrounds are present in all areas of the state. In 1970, non-Hispanic whites were nearly 80% of Florida's population. Those of English and Irish ancestry are present in large numbers in all the urban/suburban areas across the state. Some native white Floridians, especially those who have descended from long-time Florida families, may refer to themselves as "Florida crackers"; others see the term as a derogatory one. Like whites in most of the other Southern states, they descend mainly from English and Scots-Irish settlers, as well as some other British American settlers.
Try to answer this question if possible: How many people of Irish ancestry were in Florida in 2009?
Answer:
unanswerable