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In more recent applications, hydrogen is used pure or mixed with nitrogen (sometimes called forming gas) as a tracer gas for minute leak detection. Applications can be found in the automotive, chemical, power generation, aerospace, and telecommunications industries. Hydrogen is an authorized food additive (E 949) that allows food package leak testing among other anti-oxidizing properties.
Why would one use hydrogen mixed with nitrogen?
A: as a tracer gas for minute leak detection

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Widespread Roman interference in the Greek world was probably inevitable given the general manner of the ascendency of the Roman Republic. This Roman-Greek interaction began as a consequence of the Greek city-states located along the coast of southern Italy. Rome had come to dominate the Italian peninsula, and desired the submission of the Greek cities to its rule. Although they initially resisted, allying themselves with Pyrrhus of Epirus, and defeating the Romans at several battles, the Greek cities were unable to maintain this position and were absorbed by the Roman republic. Shortly afterwards, Rome became involved in Sicily, fighting against the Carthaginians in the First Punic War. The end result was the complete conquest of Sicily, including its previously powerful Greek cities, by the Romans.
Rome dominated what peninsula?
A: Italian

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The Taragaon Museum presents the modern history of the Kathmandu Valley. It seeks to document 50 years of research and cultural heritage conservation of the Kathmandu Valley, documenting what artists photographers architects anthropologists from abroad had contributed in the second half of the 20th century. The actual structure of the Museum showcases restoration and rehabilitation efforts to preserve the built heritage of Kathmandu. It was designed by Carl Pruscha (master-planner of the Kathmandy Valley ) in 1970 and constructed in 1971. Restoration works began in 2010 to rehabilitate the Taragaon hostel into the Taragaon Museum. The design uses local brick along with modern architectural design elements, as well as the use of circle, triangles and squares. The Museum is within a short walk from the Boudhnath stupa, which itself can be seen from the Museum tower.
What stupa is located close to the Taragaon Museum?
A: Boudhnath

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Other important industries are financial services, especially mutual funds and insurance. Boston-based Fidelity Investments helped popularize the mutual fund in the 1980s and has made Boston one of the top financial cities in the United States. The city is home to the headquarters of Santander Bank, and Boston is a center for venture capital firms. State Street Corporation, which specializes in asset management and custody services, is based in the city. Boston is a printing and publishing center — Houghton Mifflin Harcourt is headquartered within the city, along with Bedford-St. Martin's Press and Beacon Press. Pearson PLC publishing units also employ several hundred people in Boston. The city is home to three major convention centers—the Hynes Convention Center in the Back Bay, and the Seaport World Trade Center and Boston Convention and Exhibition Center on the South Boston waterfront. The General Electric Corporation announced in January 2016 its decision to move the company's global headquarters to the Seaport District in Boston, from Fairfield, Connecticut, citing factors including Boston's preeminence in the realm of higher education.
Boston is the center for what type of capital firms?
A:
venture capital