Question: Natives of North America began practicing farming approximately 4,000 years ago, late in the Archaic period of North American cultures. Technology had advanced to the point that pottery was becoming common and the small-scale felling of trees had become feasible. Concurrently, the Archaic Indians began using fire in a controlled manner. Intentional burning of vegetation was used to mimic the effects of natural fires that tended to clear forest understories. It made travel easier and facilitated the growth of herbs and berry-producing plants, which were important for both food and medicines.
Try to answer this question if possible: What had pottery become 4,000 years ago in the Americas?
Answer: common
Question: In the Soviet Union, in the 1970s, a comparison was made between systems electrified at 3 kV DC and 25 kV AC (50 Hz). The results showed that percentage losses in the overhead wires (catenary and contact wires) was over 3 times greater for 3 kV DC than for 25 kV AC. But when the conversion losses were all taken into account and added to overhead wire losses (including cooling blower energy) the 25 kV AC lost a somewhat higher percent of energy than for 3 kV DC. Thus in spite of the much higher losses in the catenary, the 3 kV DC was a little more energy efficient than AC in providing energy from the USSR power grid to the terminals of the traction motors (all DC at that time). While both systems use energy in converting higher voltage AC from the USSR's power grid to lower voltage DC, the conversions for the DC system all took place (at higher efficiency) in the railway substation, while most of the conversion for the AC system took place inside the locomotive (at lower efficiency). Consider also that it takes energy to constantly move this mobile conversion hardware over the rails while the stationary hardware in the railway substation doesn't incur this energy cost. For more details see: Wiki: Soviet Union DC vs. AC.
Try to answer this question if possible: What came with lesser lesser cost mobile conversion hardware or stationary hardware?
Answer: stationary hardware
Question: The city also has a number of other, smaller newspapers and magazine in circulation such as the Philadelphia Tribune, which serves the African-American community, the Philadelphia, a monthly regional magazine; Philadelphia Weekly, an weekly-printed alternative newspaper; Philadelphia City Paper another weekly-printed newspaper; Philadelphia Gay News, which services the LGBT community; The Jewish Exponent a weekly-printed newspaper servicing the Jewish community; Philadelphia Metro, free daily newspaper; and Al Dia, a weekly newspaper servicing the Latino community.
Try to answer this question if possible: Name a Jewish newspaper?
Answer: The Jewish Exponent
Question: The Gross Domestic Product (GDP) of Florida in 2010 was $748 billion. Its GDP is the fourth largest economy in the United States. In 2010, it became the fourth largest exporter of trade goods. The major contributors to the state's gross output in 2007 were general services, financial services, trade, transportation and public utilities, manufacturing and construction respectively. In 201011, the state budget was $70.5 billion, having reached a high of $73.8 billion in 200607. Chief Executive Magazine name Florida the third "Best State for Business" in 2011.
Try to answer this question if possible: What was Florida named in 2011
Answer:
Chief Executive Magazine name Florida the third "Best State for Business" in 2011