Problem: Authors including William Whalen, Shawn Francis Peters and former Witnesses Barbara Grizzuti Harrison, Alan Rogerson and William Schnell have claimed the arrests and mob violence in the United States in the 1930s and 1940s were the consequence of what appeared to be a deliberate course of provocation of authorities and other religions by Jehovah's Witnesses. Whalen, Harrison and Schnell have suggested Rutherford invited and cultivated opposition for publicity purposes in a bid to attract dispossessed members of society, and to convince members that persecution from the outside world was evidence of the truth of their struggle to serve God. Watch Tower Society literature of the period directed that Witnesses should "never seek a controversy" nor resist arrest, but also advised members not to co-operate with police officers or courts that ordered them to stop preaching, and to prefer jail rather than pay fines.
In what decade did Barbara Grizzuti Harrison escape the Jehovah's Witnesses?
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Answer: unanswerable

Problem: One disadvantage of the phalanx was that it was only effective when fighting in large, open spaces, which left the Romans at a disadvantage when fighting in the hilly terrain of central Italian peninsula. In the 4th century BC, the Romans abandoned the phalanx in favour of the more flexible manipular formation. This change is sometimes attributed to Marcus Furius Camillus and placed shortly after the Gallic invasion of 390 BC; it is more likely, however, that they were copied from Rome's Samnite enemies to the south, possibly as a result of Samnite victories during the Second Samnite War (326 to 304 BC).
In what century was the phalanx formation finally discarded by the Roman people?
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Answer: 4th century BC

Problem: The role of the gas is to prevent evaporation of the filament, without introducing significant heat losses. For these properties, chemical inertness and high atomic or molecular weight is desirable. The presence of gas molecules knocks the liberated tungsten atoms back to the filament, reducing its evaporation and allowing it to be operated at higher temperature without reducing its life (or, for operating at the same temperature, prolongs the filament life). It however introduces heat losses (and therefore efficiency loss) from the filament, by heat conduction and heat convection.
What is the purpose of the gas in a light bulb?
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Answer:
to prevent evaporation of the filament, without introducing significant heat losses