QUES: Prompted by legislation in various countries mandating increased bulb efficiency, new "hybrid" incandescent bulbs have been introduced by Philips. The "Halogena Energy Saver" incandescents can produce about 23 lm/W; about 30 percent more efficient than traditional incandescents, by using a reflective capsule to reflect formerly wasted infrared radiation back to the filament from which it can be re-emitted as visible light. This concept was pioneered by Duro-Test in 1980 with a commercial product that produced 29.8 lm/W. More advanced reflectors based on interference filters or photonic crystals can theoretically result in higher efficiency, up to a limit of about 270 lm/W (40% of the maximum efficacy possible). Laboratory proof-of-concept experiments have produced as much as 45 lm/W, approaching the efficacy of compact fluorescent bulbs.
How much more efficient are Halogena Energy Saver bulbs compared to incandescents?

ANS: 30 percent

QUES: The city's elevation is 2,643 ft (806 m) above sea level (as measured at the Tucson International Airport). Tucson is situated on an alluvial plain in the Sonoran desert, surrounded by five minor ranges of mountains: the Santa Catalina Mountains and the Tortolita Mountains to the north, the Santa Rita Mountains to the south, the Rincon Mountains to the east, and the Tucson Mountains to the west. The high point of the Santa Catalina Mountains is 9,157 ft (2,791 m) Mount Lemmon, the southernmost ski destination in the continental U.S., while the Tucson Mountains include 4,687 ft (1,429 m) Wasson Peak. The highest point in the area is Mount Wrightson, found in the Santa Rita Mountains at 9,453 ft (2,881 m) above sea level.
What mountain range is east of Tucson?

ANS: Rincon Mountains

QUES: During the 1890s, the Armenian Revolutionary Federation, commonly known as Dashnaktsutyun, became active within the Ottoman Empire with the aim of unifying the various small groups in the empire that were advocating for reform and defending Armenian villages from massacres that were widespread in some of the Armenian-populated areas of the empire. Dashnaktsutyun members also formed fedayi groups that defended Armenian civilians through armed resistance. The Dashnaks also worked for the wider goal of creating a "free, independent and unified" Armenia, although they sometimes set aside this goal in favor of a more realistic approach, such as advocating autonomy.
When did the Dashnaktsutyun originate?

ANS: 1890s

QUES: The Republic of the United Provinces lasted until a series of republican revolutions in 17831795 created the Batavian Republic. During this period, republican forces took several major cities of the Netherlands. After initially fleeing, the monarchist forces came back with British, Austrian, and Prussian troops and retook the Netherlands. The republican forces fled to France, but then successfully re-invaded alongside the army of the French republic. After the French Republic became the French Empire under Napoleon, the Batavian Republic was replaced by the Napoleonic Kingdom of Holland.
What happened that led to the creation of the French Republic?

ANS:
unanswerable