QUES: One of the problems of the standard electric light bulb is filament notching due to evaporation of the filament. Small variations in resistivity along the filament cause "hot spots" to form at points of higher resistivity; a variation of diameter of only 1% will cause a 25% reduction in service life. These hot spots evaporate faster than the rest of the filament, which increases the resistance at that pointthis creates a positive feedback that ends in the familiar tiny gap in an otherwise healthy-looking filament. Irving Langmuir found that an inert gas, instead of vacuum, would retard evaporation. General service incandescent light bulbs over about 25 watts in rating are now filled with a mixture of mostly argon and some nitrogen, or sometimes krypton. Lamps operated on direct current develop random stairstep irregularities on the filament surface which may cut lifespan in half compared to AC operation; different alloys of tungsten and rhenium can be used to counteract the effect.

Which type of alloys can decrease "stairstep" irregularities in light bulb filaments?
What is the answer?
ANS: alloys of tungsten and rhenium
QUES: The style and role of any minority leader is influenced by a variety of elements, including personality and contextual factors, such as the size and cohesion of the minority party, whether his or her party controls the White House, the general political climate in the House, and the controversy that is sometimes associated with the legislative agenda. Despite the variability of these factors, there are a number of institutional obligations associated with this position. Many of these assignments or roles are spelled out in the House rule book. Others have devolved upon the position in other ways. To be sure, the minority leader is provided with extra staff resourcesbeyond those accorded him or her as a Representativeto assist in carrying out diverse leadership functions. Worth emphasis is that there are limits on the institutional role of the minority leader, because the majority party exercises disproportionate influence over the agenda, partisan ratios on committees, staff resources, administrative operations, and the day-to-day schedule and management of floor activities.

What is the role of staff at the White House?
What is the answer?
ANS: unanswerable
QUES: There are a multitude of supporters as well as opponents to the policy of affirmative action. Many presidents throughout the last century have failed to take a very firm stance on the policy, and the public has had to discern the president's opinion for themselves. Bill Clinton, however, made his stance on affirmative action very clear in a speech on July 19, 1995, nearly two and a half years after his inauguration. In his speech, he discussed the history in the United States that brought the policy into fruition: slavery, Jim Crow, and segregation. Clinton also mentioned a point similar to President Lyndon B. Johnson's "Freedom is not Enough" speech, and declared that just outlawing discrimination in the country would not be enough to give everyone in America equality. He addressed the arguments that affirmative action hurt the white middle class and said that the policy was not the source of their problems. Clinton plainly outlined his stance on affirmative action, saying:

Which President made their stance on affirmative action clear in 1995?
What is the answer?
ANS:
Bill Clinton