Question: PCBs intended for extreme environments often have a conformal coating, which is applied by dipping or spraying after the components have been soldered. The coat prevents corrosion and leakage currents or shorting due to condensation. The earliest conformal coats were wax; modern conformal coats are usually dips of dilute solutions of silicone rubber, polyurethane, acrylic, or epoxy. Another technique for applying a conformal coating is for plastic to be sputtered onto the PCB in a vacuum chamber. The chief disadvantage of conformal coatings is that servicing of the board is rendered extremely difficult.
Is there an answer to this question: If a PCB is intended for use in an setting with extreme conditions, what would probably be applied?

Answer: conformal coating


Question: The Sun has been openly antagonistic towards other European nations, particularly the French and Germans. During the 1980s and 1990s, the nationalities were routinely described in copy and headlines as "frogs", "krauts" or "hun". As the paper is opposed to the EU it has referred to foreign leaders who it deemed hostile to the UK in unflattering terms. Former President Jacques Chirac of France, for instance, was branded "le Worm". An unflattering picture of German chancellor Angela Merkel, taken from the rear, bore the headline "I'm Big in the Bumdestag" (17 April 2006).
Is there an answer to this question: Which two nations has The Sun been very antagonistic towards?

Answer: French and Germans


Question: The use of uranium in its natural oxide form dates back to at least the year 79 CE, when it was used to add a yellow color to ceramic glazes. Yellow glass with 1% uranium oxide was found in a Roman villa on Cape Posillipo in the Bay of Naples, Italy, by R. T. Gunther of the University of Oxford in 1912. Starting in the late Middle Ages, pitchblende was extracted from the Habsburg silver mines in Joachimsthal, Bohemia (now Jáchymov in the Czech Republic), and was used as a coloring agent in the local glassmaking industry. In the early 19th century, the world's only known sources of uranium ore were these mines.
Is there an answer to this question: What institution did T.T. Gunther belong to?

Answer: unanswerable


Question: In the past, people at Eton have occasionally been guilty of antisemitism. For a time, new admissions were called 'Jews' by their fellow Collegers. In 1945, the school introduced a nationality statute conditioning entry on the applicant's father being British by birth. The statute was removed after the intervention of Prime Minister Harold Macmillan in the 1960s after it came to the attention of Oxford's Wykeham Professor of Logic, A. J. Ayer, himself Jewish and an Old Etonian, who "suspected a whiff of anti-semitism".
Is there an answer to this question: In what year did A.J. Ayer graduate from Eton?

Answer:
unanswerable