Problem: New Haven (local /nu hevn/, noo-HAY-vn), in the U.S. state of Connecticut, is the principal municipality in Greater New Haven, which had a total population of 862,477 in 2010. It is located on New Haven Harbor on the northern shore of the Long Island Sound in New Haven County, Connecticut, which in turn comprises the outer limits of the New York metropolitan area. It is the second-largest city in Connecticut (after Bridgeport), with a population of 129,779 people as of the 2010 United States Census. According to a census of 1 July 2012, by the Census Bureau, the city had a population of 130,741.
What is the population of New Haven according to the 2010 United States Census?
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Answer: 129,779

Problem: One of the problems of the standard electric light bulb is filament notching due to evaporation of the filament. Small variations in resistivity along the filament cause "hot spots" to form at points of higher resistivity; a variation of diameter of only 1% will cause a 25% reduction in service life. These hot spots evaporate faster than the rest of the filament, which increases the resistance at that pointthis creates a positive feedback that ends in the familiar tiny gap in an otherwise healthy-looking filament. Irving Langmuir found that an inert gas, instead of vacuum, would retard evaporation. General service incandescent light bulbs over about 25 watts in rating are now filled with a mixture of mostly argon and some nitrogen, or sometimes krypton. Lamps operated on direct current develop random stairstep irregularities on the filament surface which may cut lifespan in half compared to AC operation; different alloys of tungsten and rhenium can be used to counteract the effect.
What is the negative effect of "hot spots" forming on the filament?
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Answer: a variation of diameter of only 1% will cause a 25% reduction in service life

Problem: In 1768 Russian-backed Ukrainian Haidamaks, pursuing Polish confederates, entered Balta, an Ottoman-controlled town on the border of Bessarabia in Ukraine, and massacred its citizens and burned the town to the ground. This action provoked the Ottoman Empire into the Russo-Turkish War of 17681774. The Treaty of Kucuk Kaynarca of 1774 ended the war and provided freedom to worship for the Christian citizens of the Ottoman-controlled provinces of Wallachia and Moldavia. By the late 18th century, a number of defeats in several wars with Russia led some people in the Ottoman Empire to conclude that the reforms of Peter the Great had given the Russians an edge, and the Ottomans would have to keep up with Western technology in order to avoid further defeats.
During what years was the Russo-Turkish war?
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Answer:
17681774