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.

[Q]: Occlusion by this astronomical body of Saggitarius Tr-180 suggests that the rate of sublimation from its surface has doubled. That sublimation may have helped to create evaporite deposits such as the Akupara and Rem maculae, which cover a surface of beta-hexagonal ice surrounding the Plain of Abatus. Its changing albedo is believed to couple with gravitational diapirism to produce the cavi of its unique terrane of Bubeme. Perhaps the most interesting surface features occur in its equatorial region, which contains fault-block mountain ranges bounded by the Ho and Lo sulci, indicating a tectonic past, and the geyser plumes Hili and Mahilani, which contribute to its thin atmosphere. FTP, name this moon of Neptune best known for its cryovolcanic eruptions and its retrograde orbit.
[A]: Science


[Q]: The Soave equation adds an acentric factor to this statement, and the virial equation measures deviations from this law using a compressibility factor. This law derived by Benoit Clapeyron can account for density in its "dirty mop" form, and when A and B terms are added to account for the volume and interactions between particles, it is called van der Waals equation. Containing a namesake constant that is Boltzmann's constant times Avogadro's number is, for 10 points, what law usually stated as PV equals nRT
[A]: Science


[Q]: This man's wedding was interrupted by an army led by Agenor, and he exchanged kingdoms with Megapenthes in order to reign in Tiryns. Raised on the island of Seriphos, this figure was once asked to contribute a horse by a man who actually had no intention to marry Hippodameia. He accidentally killed his grandfather with a discus; that man, King Acrisius, had earlier put him in a chest that was set adrift and was eventually found by the fisherman Dictys. This son of Zeus and Danae saved Andromeda from a sea monster while on his way home from a quest in which he used a mirror-like shield to behead a figure with serpents for hair. For 10 points, name this hero who slew Medusa.
[A]:
History