QUES: Portugal spearheaded European exploration of the world and the Age of Discovery. Prince Henry the Navigator, son of King Joao I, became the main sponsor and patron of this endeavour. During this period, Portugal explored the Atlantic Ocean, discovering several Atlantic archipelagos like the Azores, Madeira, and Cape Verde, explored the African coast, colonized selected areas of Africa, discovered an eastern route to India via the Cape of Good Hope, discovered Brazil, explored the Indian Ocean, established trading routes throughout most of southern Asia, and sent the first direct European maritime trade and diplomatic missions to China and Japan.

What European age did Portugal spearhead?
What is the answer?
ANS: the Age of Discovery
QUES: The gas centrifuge process, where gaseous uranium hexafluoride (UF
6) is separated by the difference in molecular weight between 235UF6 and 238UF6 using high-speed centrifuges, is the cheapest and leading enrichment process. The gaseous diffusion process had been the leading method for enrichment and was used in the Manhattan Project. In this process, uranium hexafluoride is repeatedly diffused through a silver-zinc membrane, and the different isotopes of uranium are separated by diffusion rate (since uranium 238 is heavier it diffuses slightly slower than uranium-235). The molecular laser isotope separation method employs a laser beam of precise energy to sever the bond between uranium-235 and fluorine. This leaves uranium-238 bonded to fluorine and allows uranium-235 metal to precipitate from the solution. An alternative laser method of enrichment is known as atomic vapor laser isotope separation (AVLIS) and employs visible tunable lasers such as dye lasers. Another method used is liquid thermal diffusion.

In the gaseous diffusion process, what is diffused through a gold-zinc membrane?
What is the answer?
ANS: unanswerable
QUES: Season six premiered with the series' highest-rated debut episode and a few of its succeeding episodes rank among the most watched episodes of American Idol. During this time, many television executives begun to regard the show as a programming force unlike any seen before, as its consistent dominance of up to two hours two or three nights a week exceeded the 30- or 60-minute reach of previous hits such as NBC's The Cosby Show. The show was dubbed "the Death Star", and competing networks often rearranged their schedules in order to minimize losses. However, season six also showed a steady decline in viewership over the course of the season. The season finale saw a drop in ratings of 16% from the previous year. Season six was the first season wherein the average results show rated higher than the competition stages (unlike in the previous seasons), and became the second highest-rated of the series after the preceding season.

Which television network originally aired The Cosby Show?
What is the answer?
ANS:
NBC