Problem: LEDs have been developed by Seoul Semiconductor that can operate on AC power without the need for a DC converter. For each half-cycle, part of the LED emits light and part is dark, and this is reversed during the next half-cycle. The efficacy of this type of HP-LED is typically 40 lm/W. A large number of LED elements in series may be able to operate directly from line voltage. In 2009, Seoul Semiconductor released a high DC voltage LED, named as 'Acrich MJT', capable of being driven from AC power with a simple controlling circuit. The low-power dissipation of these LEDs affords them more flexibility than the original AC LED design.
What company has developed LEDs that can operate on AC power?
The answer is the following: Seoul Semiconductor

Problem: World War II holds a special place in the American psyche as the country's greatest triumph, and the U.S. military personnel of World War II are frequently referred to as "the Greatest Generation." Over 16 million served (about 11% of the population), and over 400,000 died during the war. The U.S. emerged as one of the two undisputed superpowers along with the Soviet Union, and unlike the Soviet Union, the U.S. homeland was virtually untouched by the ravages of war. During and following World War II, the United States and Britain developed an increasingly strong defense and intelligence relationship. Manifestations of this include extensive basing of U.S. forces in the UK, shared intelligence, shared military technology (e.g. nuclear technology), and shared procurement.
Both during and after the conclusion of World War II, the United States formed a firm alliance with what country?
The answer is the following: Britain

Problem: Guam (i/wm/ or /wm/; Chamorro: Guahan;[needs IPA] formally the Territory of Guam) is an unincorporated and organized territory of the United States. Located in the northwestern Pacific Ocean, Guam is one of five American territories with an established civilian government. The capital city is Hagatna, and the most populous city is Dededo. In 2015, 161,785 people resided on Guam. Guamanians are American citizens by birth. Guam has an area of 544 km2 (210 sq mi) and a density of 297/km (770/sq mi). It is the largest and southernmost of the Mariana Islands, and the largest island in Micronesia. Among its municipalities, Mongmong-Toto-Maite has the highest density at 1,425/km (3,691/sq mi), whereas Inarajan and Umatac have the lowest density at 47/km (119/sq mi). The highest point is Mount Lamlam at 406 meters (1,332 ft) above sea level.
Where is the island of Guan located?
The answer is the following: northwestern Pacific Ocean

Problem: The German Renaissance has bequeathed the city some noteworthy buildings (especially the current Chambre de commerce et d'industrie, former town hall, on Place Gutenberg), as did the French Baroque and Classicism with several hotels particuliers (i.e. palaces), among which the Palais Rohan (1742, now housing three museums) is the most spectacular. Other buildings of its kind are the "Hotel de Hanau" (1736, now the city hall), the Hotel de Klinglin (1736, now residence of the prefet), the Hotel des Deux-Ponts (1755, now residence of the military governor), the Hotel d'Andlau-Klinglin (1725, now seat of the administration of the Port autonome de Strasbourg) etc. The largest baroque building of Strasbourg though is the 150 m (490 ft) long 1720s main building of the Hopital civil. As for French Neo-classicism, it is the Opera House on Place Broglie that most prestigiously represents this style.
How many museums does the Palais Rohan hold?
The answer is the following:
three