Article: Solar technologies are broadly characterized as either passive or active depending on the way they capture, convert and distribute sunlight and enable solar energy to be harnessed at different levels around the world, mostly depending on distance from the equator. Although solar energy refers primarily to the use of solar radiation for practical ends, all renewable energies, other than geothermal and tidal, derive their energy from the Sun in a direct or indirect way.

Question: Which renewable energies do not acquire their energy from the sun?
Ans: geothermal and tidal


Article: In January 1915, Bell made the first ceremonial transcontinental telephone call. Calling from the AT&T head office at 15 Dey Street in New York City, Bell was heard by Thomas Watson at 333 Grant Avenue in San Francisco. The New York Times reported:

Question: In what month and year did Bell telephone across the country?
Ans: January 1915


Article: In Paris, Chopin encountered artists and other distinguished figures, and found many opportunities to exercise his talents and achieve celebrity. During his years in Paris he was to become acquainted with, among many others, Hector Berlioz, Franz Liszt, Ferdinand Hiller, Heinrich Heine, Eugène Delacroix, and Alfred de Vigny. Chopin was also acquainted with the poet Adam Mickiewicz, principal of the Polish Literary Society, some of whose verses he set as songs.

Question: What did Frédéric create from verses of the poet Adam Mickiewicz?
Ans: songs


Article: In modern-day Germany, the Holy Roman Empire continued to rule, but the elective nature of the imperial crown meant there was no enduring dynasty around which a strong state could form. Further east, the kingdoms of Poland, Hungary, and Bohemia grew powerful. In Iberia, the Christian kingdoms continued to gain land from the Muslim kingdoms of the peninsula; Portugal concentrated on expanding overseas during the 15th century, while the other kingdoms were riven by difficulties over royal succession and other concerns. After losing the Hundred Years' War, England went on to suffer a long civil war known as the Wars of the Roses, which lasted into the 1490s and only ended when Henry Tudor (r. 1485–1509 as Henry VII) became king and consolidated power with his victory over Richard III (r. 1483–85) at Bosworth in 1485. In Scandinavia, Margaret I of Denmark (r. in Denmark 1387–1412) consolidated Norway, Denmark, and Sweden in the Union of Kalmar, which continued until 1523. The major power around the Baltic Sea was the Hanseatic League, a commercial confederation of city states that traded from Western Europe to Russia. Scotland emerged from English domination under Robert the Bruce (r. 1306–29), who secured papal recognition of his kingship in 1328.

Question: During what century did Portugal devote itself to overseas expansion?
Ans:
15th