Problem: Incandescent light bulb:

On 13 December 1904, Hungarian Sándor Just and Croatian Franjo Hanaman were granted a Hungarian patent (No. 34541) for a tungsten filament lamp that lasted longer and gave brighter light than the carbon filament. Tungsten filament lamps were first marketed by the Hungarian company Tungsram in 1904. This type is often called Tungsram-bulbs in many European countries. Filling a bulb with an inert gas such as argon or nitrogen retards the evaporation of the tungsten filament compared to operating it in a vacuum. This allows for greater temperatures and therefore greater efficacy with less reduction in filament life.

What is not a common alternate name for the tungsten filament bulb in Europe.
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A: unanswerable


Problem: Muslim world:

Muslim scientists contributed to advances in the sciences. They placed far greater emphasis on experiment than had the Greeks. This led to an early scientific method being developed in the Muslim world, where progress in methodology was made, beginning with the experiments of Ibn al-Haytham (Alhazen) on optics from circa 1000, in his Book of Optics. The most important development of the scientific method was the use of experiments to distinguish between competing scientific theories set within a generally empirical orientation, which began among Muslim scientists. Ibn al-Haytham is also regarded as the father of optics, especially for his empirical proof of the intromission theory of light. Some have also described Ibn al-Haytham as the "first scientist." al-Khwarzimi's invented the log base systems that are being used today, he also contributed theorems in trigonometry as well as limits. Recent studies show that it is very likely that the Medieval Muslim artists were aware of advanced decagonal quasicrystal geometry (discovered half a millennium later in the 1970s and 1980s in the West) and used it in intricate decorative tilework in the architecture.

What did Ibn al-Haytham write in the 10th century
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A: unanswerable


Problem: Nanjing:

Under the Qing dynasty (1644–1911), the Nanjing area was known as Jiangning (江寧) and served as the seat of government for the Viceroy of Liangjiang. It had been visited by the Kangxi and Qianlong emperors a number of times on their tours of the southern provinces. Nanjing was invaded by British troops during the close of the First Opium War, which was ended by the Treaty of Nanjing in 1842. As the capital of the brief-lived rebel Taiping Heavenly Kingdom (founded by the Taiping rebels in the mid-19th century, Nanjing was known as Tianjing (天京, "Heavenly Capital" or "Capital of Heaven").

What emperors visited Nanjing more than once?
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A: the Kangxi and Qianlong emperors


Problem: North Carolina:

North Carolina made the smallest per-capita contribution to the war of any state, as only 7,800 men joined the Continental Army under General George Washington; an additional 10,000 served in local militia units under such leaders as General Nathanael Greene. There was some military action, especially in 1780–81. Many Carolinian frontiersmen had moved west over the mountains, into the Washington District (later known as Tennessee), but in 1789, following the Revolution, the state was persuaded to relinquish its claim to the western lands. It ceded them to the national government so that the Northwest Territory could be organized and managed nationally.

What state made the smallest contribution to the revolutionary war of any state?
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A:
North Carolina