Problem: Please answer a question about the following article about Detroit:
Oakland County in Metro Detroit, once rated amongst the wealthiest US counties per household, is no longer shown in the top 25 listing of Forbes magazine. But internal county statistical methods based on measuring per capita income for counties with more than one million residents show that Oakland is still within the top 12, slipping from the 4th-most affluent such county in the U.S. in 2004 to 11th-most affluent in 2009. Detroit dominates Wayne County, which has an average household income of about $38,000, compared to Oakland County's $62,000.
What city dominates Wayne County?
A: Detroit
Problem: Please answer a question about the following article about Age of Enlightenment:
Frederick the Great, the king of Prussia from 1740 to 1786, saw himself as a leader of the Enlightenment and patronized philosophers and scientists at his court in Berlin. Voltaire, who had been imprisoned and maltreated by the French government, was eager to accept Frederick's invitation to live at his palace. Frederick explained, "My principal occupation is to combat ignorance and prejudice ... to enlighten minds, cultivate morality, and to make people as happy as it suits human nature, and as the means at my disposal permit."
Which king of Prussia saw himself as the leader of the Enlightenment?
A: Frederick the Great
Problem: Please answer a question about the following article about Alexander Graham Bell:
Bell and his assistant Charles Sumner Tainter jointly invented a wireless telephone, named a photophone, which allowed for the transmission of both sounds and normal human conversations on a beam of light. Both men later became full associates in the Volta Laboratory Association.
What did Bell call his cord-free phone?
A: photophone
Problem: Please answer a question about the following article about Capacitor:
Most types of capacitor include a dielectric spacer, which increases their capacitance. These dielectrics are most often insulators. However, low capacitance devices are available with a vacuum between their plates, which allows extremely high voltage operation and low losses. Variable capacitors with their plates open to the atmosphere were commonly used in radio tuning circuits. Later designs use polymer foil dielectric between the moving and stationary plates, with no significant air space between them.
What did the later designs of capacitors used in radio tuning circuits no longer have?
A:
no significant air space