TASK DEFINITION: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
PROBLEM: composer of this opera was convinced to pursue it by his friend Sybil Seligman, who commissioned a translation of its text. At one point, a character reads the Fifty-first Psalm of David, though the original text had a book entitled "Old Joe Miller's Jokes. " Another character expresses frustration in the first act by declaring "Che terra maledetta," after which the romantic conflict is established by the aria "Chi c'e per farmi I ricci" In the second act, another character's knowledge of Nina Micheltorena is asked into by Ashby, and later that character sings the aria "Ch'ella mi creda libero. " Based on a play by David Belasco, it also features Wowkle and Billy, who are urged to marry in a church, and Jim Larkens who simply longs to go home. Ramirez is the secret identity of Dick Johnson, who is saved by his beloved Minnie. FTP, name this opera set in the American west, by Puccini.

SOLUTION: Fine Arts

PROBLEM: When these devices exploit their voltage-dependent variable capacitance they are known as varactors. Barring the creation of local hot spots, a non-destructive avalanche current is produced by electron-hole pair propagation when the electric field within the (*) depletion region of these devices reaches a critical value. Majority carriers exist in an energy state greater than the Fermi energy in the Schottky barrier variety and those that operate in reverse breakdown are named after Zener. For 10 pointsname these devices that allow current to pass in only one direction.

SOLUTION: Science

PROBLEM: Voigt developed a set of tensor equations to describe the linear behavior of materials exhibiting this effect, and a rank-3 tensor with 18 coefficients is used to describe materials with this property. Titanate salts of barium and lead are used in microphones because they exhibit this property, and Langevin developed a submarine detector that relied on this effect. This effect occurs in materials lacking a centre of symmetry and has an inverse effect called electrostriction. It was first observed by the Curie brothers in their studies of Rochelle salts. For 10 points identify this effect which sees the production of current in response to the application of a mechanical stress.

SOLUTION:
Science