Problem: Lack of political unity within Greece resulted in frequent conflict between Greek states. The most devastating intra-Greek war was the Peloponnesian War (431404 BC), won by Sparta and marking the demise of the Athenian Empire as the leading power in ancient Greece. Both Athens and Sparta were later overshadowed by Thebes and eventually Macedon, with the latter uniting the Greek world in the League of Corinth (also known as the Hellenic League or Greek League) under the guidance of Phillip II, who was elected leader of the first unified Greek state in history.
Who eventually brought the Greeks together?
The answer is the following: Macedon

Problem: There are strict limits to how efficiently heat can be converted into work in a cyclic process, e.g. in a heat engine, as described by Carnot's theorem and the second law of thermodynamics. However, some energy transformations can be quite efficient. The direction of transformations in energy (what kind of energy is transformed to what other kind) is often determined by entropy (equal energy spread among all available degrees of freedom) considerations. In practice all energy transformations are permitted on a small scale, but certain larger transformations are not permitted because it is statistically unlikely that energy or matter will randomly move into more concentrated forms or smaller spaces.
What is often determined by entropy considerations?
The answer is the following: direction of transformations in energy

Problem: Unsure of his future, he first contemplated returning to London to complete his studies, but decided to return to Boston as a teacher. His father helped him set up his private practice by contacting Gardiner Greene Hubbard, the president of the Clarke School for the Deaf for a recommendation. Teaching his father's system, in October 1872, Alexander Bell opened his "School of Vocal Physiology and Mechanics of Speech" in Boston, which attracted a large number of deaf pupils, with his first class numbering 30 students. While he was working as a private tutor, one of his most famous pupils was Helen Keller, who came to him as a young child unable to see, hear, or speak. She was later to say that Bell dedicated his life to the penetration of that "inhuman silence which separates and estranges." In 1893, Keller performed the sod-breaking ceremony for the construction of the new Bell's new Volta Bureau, dedicated to "the increase and diffusion of knowledge relating to the deaf".
What city did Bell decide to return to?
The answer is the following: Boston

Problem: The portion of the city south of the James River is known as the Southside. Neighborhoods in the city's Southside area range from affluent and middle class suburban neighborhoods Westover Hills, Forest Hill, Southampton, Stratford Hills, Oxford, Huguenot Hills, Hobby Hill, and Woodland Heights to the impoverished Manchester and Blackwell areas, the Hillside Court housing projects, and the ailing Jefferson Davis Highway commercial corridor. Other Southside neighborhoods include Fawnbrook, Broad Rock, Cherry Gardens, Cullenwood, and Beaufont Hills. Much of Southside developed a suburban character as part of Chesterfield County before being annexed by Richmond, most notably in 1970.
What notable public housing projects are present in the Southside?
The answer is the following:
Hillside Court