Problem: Because the states were preexisting political entities, the U.S. Constitution did not need to define or explain federalism in any one section but it often mentions the rights and responsibilities of state governments and state officials in relation to the federal government. The federal government has certain express powers (also called enumerated powers) which are powers spelled out in the Constitution, including the right to levy taxes, declare war, and regulate interstate and foreign commerce. In addition, the Necessary and Proper Clause gives the federal government the implied power to pass any law "necessary and proper" for the execution of its express powers. Other powersthe reserved powersare reserved to the people or the states. The power delegated to the federal government was significantly expanded by the Supreme Court decision in McCulloch v. Maryland (1819), amendments to the Constitution following the Civil War, and by some later amendmentsas well as the overall claim of the Civil War, that the states were legally subject to the final dictates of the federal government.
What are the expressed powers?
The answer is the following: the right to levy taxes, declare war, and regulate interstate and foreign commerce.

Problem: With increasing environmental concerns about synthetic coatings (such as PFOA) and the higher prices of hydrocarbon based petrochemicals, there is a focus on zein (corn protein) as a coating for paper in high grease applications such as popcorn bags.
Popcorn bags produced modernly are likely to use what type of coating?
The answer is the following: corn protein

Problem: Migration plays an important role in Thuringia. The internal migration shows a strong tendency from rural areas towards the big cities. From 2008 to 2012, there was a net migration from Thuringia to Erfurt of +6,700 persons (33 per 1000 inhabitants), +1,800 to Gera (19 per 1000), +1,400 to Jena (14 per 1000), +1,400 to Eisenach (33 per 1000) and +1,300 to Weimar (21 per 1000). Between Thuringia and the other German states, the balance is negative: In 2012, Thuringia lost 6,500 persons to other federal states, the most to Bavaria, Saxony, Hesse and Berlin. Only with Saxony-Anhalt and Brandenburg the balance is positive. The international migration is fluctuating heavily. In 2009, the balance was +700, in 2010 +1,800, in 2011 +2,700 and in 2012 +4,800. The most important countries of origin of the Thuringia migrants from 2008 to 2012 were Poland (+1,700), Romania (+1,200), Afghanistan (+1,100) and Serbia/Montenegro/Kosovo (+1,000), whereas the balance was negative with Switzerland (2,800) and Austria (900).
Is the migration to Thuringia steady or fluctuating?
The answer is the following: The international migration is fluctuating heavily

Problem: Orthodox Christianity includes a large number of traditions regarding the Ever Virgin Mary, the Theotokos. The Orthodox believe that she was and remained a virgin before and after Christ's birth. The Theotokia (i.e., hymns to the Theotokos) are an essential part of the Divine Services in the Eastern Church and their positioning within the liturgical sequence effectively places the Theotokos in the most prominent place after Christ. Within the Orthodox tradition, the order of the saints begins with: The Theotokos, Angels, Prophets, Apostles, Fathers, Martyrs, etc. giving the Virgin Mary precedence over the angels. She is also proclaimed as the "Lady of the Angels".
What do the Orthodox believe Mary remained to be before and after she gave birth to Christ?
The answer is the following:
a virgin