Problem: Printed circuit board:

Subtractive methods remove copper from an entirely copper-coated board to leave only the desired copper pattern. In additive methods the pattern is electroplated onto a bare substrate using a complex process. The advantage of the additive method is that less material is needed and less waste is produced. In the full additive process the bare laminate is covered with a photosensitive film which is imaged (exposed to light through a mask and then developed which removes the unexposed film). The exposed areas are sensitized in a chemical bath, usually containing palladium and similar to that used for through hole plating which makes the exposed area capable of bonding metal ions. The laminate is then plated with copper in the sensitized areas. When the mask is stripped, the PCB is finished.

When the PCB is stripped, what is finished?
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A: unanswerable


Problem: North Carolina:

Spanish explorers traveling inland in the 16th century met Mississippian culture people at Joara, a regional chiefdom near present-day Morganton. Records of Hernando de Soto attested to his meeting with them in 1540. In 1567 Captain Juan Pardo led an expedition to claim the area for the Spanish colony and to establish another route to protect silver mines in Mexico. Pardo made a winter base at Joara, which he renamed Cuenca. His expedition built Fort San Juan and left a contingent of 30 men there, while Pardo traveled further, and built and garrisoned five other forts. He returned by a different route to Santa Elena on Parris Island, South Carolina, then a center of Spanish Florida. In the spring of 1568, natives killed all but one of the soldiers and burned the six forts in the interior, including the one at Fort San Juan. Although the Spanish never returned to the interior, this effort marked the first European attempt at colonization of the interior of what became the United States. A 16th-century journal by Pardo's scribe Bandera and archaeological findings since 1986 at Joara have confirmed the settlement.

In the 16th century, where did Spanish explorers meet Mississipian cultureal people?
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A: Joara


Problem: Unicode:

The CJK ideographs currently have codes only for their precomposed form. Still, most of those ideographs comprise simpler elements (often called radicals in English), so in principle, Unicode could have decomposed them, as it did with Hangul. This would have greatly reduced the number of required code points, while allowing the display of virtually every conceivable ideograph (which might do away with some of the problems caused by Han unification). A similar idea is used by some input methods, such as Cangjie and Wubi. However, attempts to do this for character encoding have stumbled over the fact that ideographs do not decompose as simply or as regularly as Hangul does.

What ideographs do not have codes for their precomposed form yet?
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A: unanswerable


Problem: Hokkien:

Hokkien dialects are analytic; in a sentence, the arrangement of words is important to its meaning. A basic sentence follows the subject–verb–object pattern (i.e. a subject is followed by a verb then by an object), though this order is often violated because Hokkien dialects are topic-prominent. Unlike synthetic languages, seldom do words indicate time, gender and plural by inflection. Instead, these concepts are expressed through adverbs, aspect markers, and grammatical particles, or are deduced from the context. Different particles are added to a sentence to further specify its status or intonation.

What is added to a sentence to specify plural by inflection?
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A:
unanswerable