Here is a question about this article: Temporal theories offer an alternative that appeals to the temporal structure of action potentials, mostly the phase-locking and mode-locking of action potentials to frequencies in a stimulus. The precise way this temporal structure helps code for pitch at higher levels is still debated, but the processing seems to be based on an autocorrelation of action potentials in the auditory nerve. However, it has long been noted that a neural mechanism that may accomplish a delaya necessary operation of a true autocorrelationhas not been found. At least one model shows that a temporal delay is unnecessary to produce an autocorrelation model of pitch perception, appealing to phase shifts between cochlear filters; however, earlier work has shown that certain sounds with a prominent peak in their autocorrelation function do not elicit a corresponding pitch percept, and that certain sounds without a peak in their autocorrelation function nevertheless elicit a pitch. To be a more complete model, autocorrelation must therefore apply to signals that represent the output of the cochlea, as via auditory-nerve interspike-interval histograms. Some theories of pitch perception hold that pitch has inherent octave ambiguities, and therefore is best decomposed into a pitch chroma, a periodic value around the octave, like the note names in western musicand a pitch height, which may be ambiguous, that indicates the octave the pitch is in.
What is the answer to this question: Pitch perception has inherent octave what?
****
So... ambiguities

Here is a question about this article: The Appalachian Mountains are the coolest area of the state, with temperatures averaging in the low 40s and upper 30s F (63 C) for highs in the winter and falling into the low 20s F (5 C) or lower on winter nights. Relatively cool summers have temperatures rarely rising above 80 F (27 C). Average snowfall in many areas exceeds 30 in (76 cm) per year, and can be heavy at the higher elevations; for example, during the Blizzard of 1993 more than 60 in (152 cm) of snow fell on Mount Mitchell over a period of three days. Mount Mitchell has received snow in every month of the year.
What is the answer to this question: What are the average high winter temperatures in the Appalachians?
****
So... low 40s and upper 30s F

Here is a question about this article: The United States originally wished to remain neutral when World War I broke out in August 1914. However, it insisted on its right as a neutral party to immunity from German submarine attack, even though its ships carried food and raw materials to Britain. In 1917 the Germans resumed submarine attacks, knowing that it would lead to American entry. When the U.S declared war, the U.S. army was still small by European standards and mobilization would take a year. Meanwhile, the U.S. continued to provide supplies and money to Britain and France, and initiated the first peacetime draft. Industrial mobilization took longer than expected, so divisions were sent to Europe without equipment, relying instead on the British and French to supply them.
What is the answer to this question: What German war policy precipitated US involvement in WWI?
****
So...
submarine attacks