Problem: Capacitor:

Capacitors, especially ceramic capacitors, and older designs such as paper capacitors, can absorb sound waves resulting in a microphonic effect. Vibration moves the plates, causing the capacitance to vary, in turn inducing AC current. Some dielectrics also generate piezoelectricity. The resulting interference is especially problematic in audio applications, potentially causing feedback or unintended recording. In the reverse microphonic effect, the varying electric field between the capacitor plates exerts a physical force, moving them as a speaker. This can generate audible sound, but drains energy and stresses the dielectric and the electrolyte, if any.

What is it called when a changing electric field existing between the conductive plates of a capacitor physically moves them?
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A: the reverse microphonic effect


Problem: At no more than 200 kilometres (120 mi) north to south and 130 kilometres (81 mi) east to west, Swaziland is one of the smallest countries in Africa. Despite its size, however, its climate and topography is diverse, ranging from a cool and mountainous highveld to a hot and dry lowveld. The population is primarily ethnic Swazis whose language is siSwati. They established their kingdom in the mid-18th century under the leadership of Ngwane III; the present boundaries were drawn up in 1881. After the Anglo-Boer War, Swaziland was a British protectorate from 1903 until 1967. It regained its independence on 6 September 1968.
In terms of size where does Swaziland rank within Africa in terms of country size?
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Answer: one of the smallest


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Visual anthropology is concerned, in part, with the study and production of ethnographic photography, film and, since the mid-1990s, new media. While the term is sometimes used interchangeably with ethnographic film, visual anthropology also encompasses the anthropological study of visual representation, including areas such as performance, museums, art, and the production and reception of mass media. Visual representations from all cultures, such as sandpaintings, tattoos, sculptures and reliefs, cave paintings, scrimshaw, jewelry, hieroglyphics, paintings and photographs are included in the focus of visual anthropology.
What term is visual anthropology sometimes used interchangeably with?
A: ethnographic film


Context and question: Perhaps the greatest question regarding the future development of transnational policing is: in whose interest is it? At a more practical level, the question translates into one about how to make transnational policing institutions democratically accountable (Sheptycki, 2004). For example, according to the Global Accountability Report for 2007 (Lloyd, et al. 2007) Interpol had the lowest scores in its category (IGOs), coming in tenth with a score of 22% on overall accountability capabilities (p. 19). As this report points out, and the existing academic literature on transnational policing seems to confirm, this is a secretive area and one not open to civil society involvement.
What is the least-accountable IGO?
Answer: Interpol


Question: In the early 20th century several mandolin orchestras (Estudiantinas) were active in Belgium. Today only a few groups remain: Royal Estudiantina la Napolitaine (founded in 1904) in Antwerp, Brasschaats mandoline orkest in Brasschaat and an orchestra in Mons (Bergen). Gerda Abts is a well known mandolin virtuoso in Belgium. She is also mandolin teacher and gives lessons in the music academies of Lier, Wijnegem and Brasschaat. She is now also professor mandolin at the music high school “Koninklijk Conservatorium Artesis Hogeschool Antwerpen”. She also gives various concerts each year in different ensembles. She is in close contact to the Brasschaat mandolin Orchestra. Her site is www.gevoeligesnaar.be
Is there an answer to this question: What is an Etsudiantinas? 

Answer: mandolin orchestras


Question: From the early stages of Christianity, belief in the virginity of Mary and the virgin conception of Jesus, as stated in the gospels, holy and supernatural, was used by detractors, both political and religious, as a topic for discussions, debates and writings, specifically aimed to challenge the divinity of Jesus and thus Christians and Christianity alike. In the 2nd century, as part of the earliest anti-Christian polemics, Celsus suggested that Jesus was the illegitimate son of a Roman soldier named Panthera. The views of Celsus drew responses from Origen, the Church Father in Alexandria, Egypt, who considered it a fabricated story. How far Celsus sourced his view from Jewish sources remains a subject of discussion.
Is there an answer to this question: What century did Panthera become a Roman Soldier?

Answer:
unanswerable