Problem: The X-ray crystal density method is primarily a method for determining the Avogadro constant NA but as the Avogadro constant is related to the Planck constant it also determines a value for h. The principle behind the method is to determine NA as the ratio between the volume of the unit cell of a crystal, measured by X-ray crystallography, and the molar volume of the substance. Crystals of silicon are used, as they are available in high quality and purity by the technology developed for the semiconductor industry. The unit cell volume is calculated from the spacing between two crystal planes referred to as d220. The molar volume Vm(Si) requires a knowledge of the density of the crystal and the atomic weight of the silicon used. The Planck constant is given by
Calculating molar volume requires knowledge of what two factors?
The answer is the following: the density of the crystal and the atomic weight of the silicon used

Problem: Jeffrey Long and Rick Kittles give a long critique of the application of FST to human populations in their 2003 paper "Human Genetic Diversity and the Nonexistence of Biological Races". They find that the figure of 85% is misleading because it implies that all human populations contain on average 85% of all genetic diversity. They claim that this does not correctly reflect human population history, because it treats all human groups as independent. A more realistic portrayal of the way human groups are related is to understand that some human groups are parental to other groups and that these groups represent paraphyletic groups to their descent groups. For example, under the recent African origin theory the human population in Africa is paraphyletic to all other human groups because it represents the ancestral group from which all non-African populations derive, but more than that, non-African groups only derive from a small non-representative sample of this African population. This means that all non-African groups are more closely related to each other and to some African groups (probably east Africans) than they are to others, and further that the migration out of Africa represented a genetic bottleneck, with much of the diversity that existed in Africa not being carried out of Africa by the emigrating groups. This view produces a version of human population movements that do not result in all human populations being independent; but rather, produces a series of dilutions of diversity the further from Africa any population lives, each founding event representing a genetic subset of its parental population. Long and Kittles find that rather than 85% of human genetic diversity existing in all human populations, about 100% of human diversity exists in a single African population, whereas only about 70% of human genetic diversity exists in a population derived from New Guinea. Long and Kittles argued that this still produces a global human population that is genetically homogeneous compared to other mammalian populations.
What do Long and Kittles think of the implication that human populations contain on average 85% of all genetic diversity?
The answer is the following: misleading

Problem: Spanish explorers traveling inland in the 16th century met Mississippian culture people at Joara, a regional chiefdom near present-day Morganton. Records of Hernando de Soto attested to his meeting with them in 1540. In 1567 Captain Juan Pardo led an expedition to claim the area for the Spanish colony and to establish another route to protect silver mines in Mexico. Pardo made a winter base at Joara, which he renamed Cuenca. His expedition built Fort San Juan and left a contingent of 30 men there, while Pardo traveled further, and built and garrisoned five other forts. He returned by a different route to Santa Elena on Parris Island, South Carolina, then a center of Spanish Florida. In the spring of 1568, natives killed all but one of the soldiers and burned the six forts in the interior, including the one at Fort San Juan. Although the Spanish never returned to the interior, this effort marked the first European attempt at colonization of the interior of what became the United States. A 16th-century journal by Pardo's scribe Bandera and archaeological findings since 1986 at Joara have confirmed the settlement.
What was the name of the Spanish man that met the people in Joara?
The answer is the following: Hernando de Soto

Problem: The Alps (/ælps/; Italian: Alpi [ˈalpi]; French: Alpes [alp]; German: Alpen [ˈʔalpm̩]; Slovene: Alpe [ˈáːlpɛ]) are the highest and most extensive mountain range system that lies entirely in Europe, stretching approximately 1,200 kilometres (750 mi) across eight Alpine countries: Austria, France, Germany, Italy, Liechtenstein, Monaco, Slovenia, and Switzerland. The Caucasus Mountains are higher, and the Urals longer, but both lie partly in Asia. The mountains were formed over tens of millions of years as the African and Eurasian tectonic plates collided. Extreme shortening caused by the event resulted in marine sedimentary rocks rising by thrusting and folding into high mountain peaks such as Mont Blanc and the Matterhorn. Mont Blanc spans the French–Italian border, and at 4,810 m (15,781 ft) is the highest mountain in the Alps. The Alpine region area contains about a hundred peaks higher than 4,000 m (13,123 ft), known as the "four-thousanders".
How long has it taken for the Alps to form? 
The answer is the following:
over tens of millions of years