Problem: Industrialized societies generally follow a clock-based schedule for daily activities that do not change throughout the course of the year. The time of day that individuals begin and end work or school, and the coordination of mass transit, for example, usually remain constant year-round. In contrast, an agrarian society's daily routines for work and personal conduct are more likely governed by the length of daylight hours and by solar time, which change seasonally because of the Earth's axial tilt. North and south of the tropics daylight lasts longer in summer and shorter in winter, the effect becoming greater as one moves away from the tropics.
What is the tilt of the Earth that causes solar time to change called?
The answer is the following: axial tilt

Problem: The Umayyad Caliphate (Arabic: , trans. Al-Khilafat al-umawiyya) was the second of the four major Islamic caliphates established after the death of Muhammad. This caliphate was centered on the Umayyad dynasty (Arabic: , al-Umawiyyun, or , Banu Umayya, "Sons of Umayya"), hailing from Mecca. The Umayyad family had first come to power under the third caliph, Uthman ibn Affan (r. 644656), but the Umayyad regime was founded by Muawiya ibn Abi Sufyan, long-time governor of Syria, after the end of the First Muslim Civil War in 661 CE/41 AH. Syria remained the Umayyads' main power base thereafter, and Damascus was their capital. The Umayyads continued the Muslim conquests, incorporating the Caucasus, Transoxiana, Sindh, the Maghreb and the Iberian Peninsula (Al-Andalus) into the Muslim world. At its greatest extent, the Umayyad Caliphate covered 15 million km2 (5.79 million square miles), making it the largest empire (in terms of area - not in terms of population) the world had yet seen, and the fifth largest ever to exist.
How many million square miles was the Umayyad caliphate at its largest size?
The answer is the following: 5.79

Problem: Richmond has several historic churches. Because of its early English colonial history from the early 17th century to 1776, Richmond has a number of prominent Anglican/Episcopal churches including Monumental Church, St. Paul's Episcopal Church and St. John's Episcopal Church. Methodists and Baptists made up another section of early churches, and First Baptist Church of Richmond was the first of these, established in 1780. In the Reformed church tradition, the first Presbyterian Church in the City of Richmond was First Presbyterian Church, organized on June 18, 1812. On February 5, 1845, Second Presbyterian Church of Richmond was founded, which was a historic church where Stonewall Jackson attended and was the first Gothic building and the first gas-lit church to be built in Richmond. St. Peter's Church was dedicated and became the first Catholic church in Richmond on May 25, 1834. The city is also home to the historic Cathedral of the Sacred Heart which is the motherchurch for the Roman Catholic Diocese of Richmond.
On what date did the oldest Catholic church open in Richmond?
The answer is the following: May 25, 1834

Problem: During 1889, Thomas Edison had business interests in many electricity-related companies: Edison Lamp Company, a lamp manufacturer in East Newark, New Jersey; Edison Machine Works, a manufacturer of dynamos and large electric motors in Schenectady, New York; Bergmann & Company, a manufacturer of electric lighting fixtures, sockets, and other electric lighting devices; and Edison Electric Light Company, the patent-holding company and the financial arm backed by J.P. Morgan and the Vanderbilt family for Edison's lighting experiments. In 1889, Drexel, Morgan & Co., a company founded by J.P. Morgan and Anthony J. Drexel, financed Edison's research and helped merge those companies under one corporation to form Edison General Electric Company which was incorporated in New York on April 24, 1889. The new company also acquired Sprague Electric Railway & Motor Company in the same year.
In what year did Drexel, Morgan & Co. begin to finance Edison's research and form Edison General Electric Company?
The answer is the following:
1889