QUES: Bitumen was used in early photographic technology. In 1826 or 1827, it was used by French scientist Joseph Nicephore Niepce to make the oldest surviving photograph from nature. The bitumen was thinly coated onto a pewter plate which was then exposed in a camera. Exposure to light hardened the bitumen and made it insoluble, so that when it was subsequently rinsed with a solvent only the sufficiently light-struck areas remained. Many hours of exposure in the camera were required, making bitumen impractical for ordinary photography, but from the 1850s to the 1920s it was in common use as a photoresist in the production of printing plates for various photomechanical printing processes.[not in citation given]

What was used in early photomechanical technology?
What is the answer?
ANS: unanswerable
QUES: In 1954, Eisenhower articulated the domino theory in his outlook towards communism in Southeast Asia and also in Central America. He believed that if the communists were allowed to prevail in Vietnam, this would cause a succession of countries to fall to communism, from Laos through Malaysia and Indonesia ultimately to India. Likewise, the fall of Guatemala would end with the fall of neighboring Mexico. That year the loss of North Vietnam to the communists and the rejection of his proposed European Defence Community (EDC) were serious defeats, but he remained optimistic in his opposition to the spread of communism, saying "Long faces don't win wars". As he had threatened the French in their rejection of EDC, he afterwards moved to restore West Germany, as a full NATO partner.

What country did Eisenhower believe communists would conquer if they took over Guatemala?
What is the answer?
ANS: Mexico
QUES: Commercial turkeys are usually reared indoors under controlled conditions. These are often large buildings, purpose-built to provide ventilation and low light intensities (this reduces the birds' activity and thereby increases the rate of weight gain). The lights can be switched on for 24-hrs/day, or a range of step-wise light regimens to encourage the birds to feed often and therefore grow rapidly. Females achieve slaughter weight at about 15 weeks of age and males at about 19. Mature commercial birds may be twice as heavy as their wild counterparts. Many different breeds have been developed, but the majority of commercial birds are white, as this improves the appearance of the dressed carcass, the pin feathers being less visible. Turkeys were at one time mainly consumed on special occasions such as Christmas (10 million birds in the United Kingdom) or Thanksgiving (60 million birds in the United States). However, they are increasingly becoming part of the everyday diet in many parts of the world.

What is the average for the amount of parrots that are consumed in the U.S on Thanksgiving Day?
What is the answer?
ANS:
unanswerable