Problem: Incandescent light bulb:

During ordinary operation, the tungsten of the filament evaporates; hotter, more-efficient filaments evaporate faster. Because of this, the lifetime of a filament lamp is a trade-off between efficiency and longevity. The trade-off is typically set to provide a lifetime of several hundred to 2,000 hours for lamps used for general illumination. Theatrical, photographic, and projection lamps may have a useful life of only a few hours, trading life expectancy for high output in a compact form. Long-life general service lamps have lower efficiency but are used where the cost of changing the lamp is high compared to the value of energy used.

What is the typical goal for the life of a tungsten filament bulb?
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A: several hundred to 2,000 hours


Problem: Efforts have been made to protect Guam's coral reef habitats from pollution, eroded silt and overfishing, problems that have led to decreased fish populations. (Since Guam is a significant vacation spot for scuba divers, this is important.) In recent years, the Department of Agriculture, Division of Aquatic and Wildlife Resources has established several new marine preserves where fish populations are monitored by biologists. Before adopting U.S. Environmental Protection Agency standards, portions of Tumon Bay were dredged by the hotel chains to provide a better experience for hotel guests. Tumon Bay has since been made into a preserve. A federal Guam National Wildlife Refuge in northern Guam protects the decimated sea turtle population in addition to a small colony of Mariana fruit bats.
What is the #1 cause of decreased fish populations?
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Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The third generation began including a 30-pin dock connector, allowing for FireWire or USB connectivity. This provided better compatibility with non-Apple machines, as most of them did not have FireWire ports at the time. Eventually Apple began shipping iPods with USB cables instead of FireWire, although the latter was available separately. As of the first-generation iPod Nano and the fifth-generation iPod Classic, Apple discontinued using FireWire for data transfer (while still allowing for use of FireWire to charge the device) in an attempt to reduce cost and form factor. As of the second-generation iPod Touch and the fourth-generation iPod Nano, FireWire charging ability has been removed. The second-, third-, and fourth-generation iPod Shuffle uses a single 3.5 mm minijack phone connector which acts as both a headphone jack and a data port for the dock.
What iPod feature allowed for USB connections with the device?
A: 30-pin dock connector


Context and question: Roman women were present at most festivals and cult observances. Some rituals specifically required the presence of women, but their active participation was limited. As a rule women did not perform animal sacrifice, the central rite of most major public ceremonies. In addition to the public priesthood of the Vestals, some cult practices were reserved for women only. The rites of the Bona Dea excluded men entirely. Because women enter the public record less frequently than men, their religious practices are less known, and even family cults were headed by the paterfamilias. A host of deities, however, are associated with motherhood. Juno, Diana, Lucina, and specialized divine attendants presided over the life-threatening act of giving birth and the perils of caring for a baby at a time when the infant mortality rate was as high as 40 percent.
What Roman rites excluded men?
Answer: Bona Dea


Question: ISPs may engage in peering, where multiple ISPs interconnect at peering points or Internet exchange points (IXs), allowing routing of data between each network, without charging one another for the data transmitted—data that would otherwise have passed through a third upstream ISP, incurring charges from the upstream ISP.
Is there an answer to this question: Who may not engage in peering?

Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Modern Nationalism, as developed especially since the French Revolution, has made the distinction between "language" and "dialect" an issue of great political importance. A group speaking a separate "language" is often seen as having a greater claim to being a separate "people", and thus to be more deserving of its own independent state, while a group speaking a "dialect" tends to be seen not as "a people" in its own right, but as a sub-group, part of a bigger people, which must content itself with regional autonomy.[citation needed] The distinction between language and dialect is thus inevitably made at least as much on a political basis as on a linguistic one, and can lead to great political controversy, or even armed conflict.
What can the distinction between regional autonomy and dialect lead to?
A:
unanswerable