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.

[EX Q]: An anharmonic oscillator exploiting this effect as a microelectromechanical system component was proposed by Serry, Walliser, and Maclay. Julian Schwinger has postulated that sonoluminescence arises due to this effect, and this effect requires that bag radius and mass are independent under a combination of the Skyrmion and MIT models, the chiral bag model of the nucleon. One setup for measuring it attached a polystyrene sphere to an atomic force microscope, and Lamoreaux used a torsional pendulum to achieve the first precise measurements of this effect. This force may produce pressures as large as an atmosphere at a separation of ten nanometers. For 10 points, name this effect arising from zero-point energy, described by the attraction or repulsion due to virtual photons between two close uncharged metallic sheets in a vacuum.
[EX A]: Science

[EX Q]: Lindstrom's theorem states that first-order logic is the strongest logic having both this property and satisfying the Lowenheim-Skolem property. A method for finding a Hausdorff space with this property containing a given space is named for Stone and Cech. Equicontinuity is the main condition for determining whether a family of functions has this property by the Arzela-Ascoli theorem. Using the axiom of choice, it can be shown that an arbitrary product of spaces with this property has this property, a result known as Tychonoff's theorem. In Euclidean space, being closed and bounded is sufficient to show, according to the Heine-Borel theorem, that a set has this property. For 10 points, identify this property which holds of a set on which every open cover has a finite subcover.
[EX A]: Science

[EX Q]: The Tchico and the Bodu are two examples of these from Guernsey lore, and one of these creatures from the Kalevala had a stone gaze and a snake tail. When the survivors of the great flood accidentally angered Texcatlipoca by building an irritating smoky fire, that god created the first examples of these animals by stitching the survivors' heads to their asses. If you bury one of these creatures alive and either cut its head off with a bamboo saw or abandon it to starve, you can release a familiar spirit called an inugami. Pandareus stole and gave to Tantalus a golden one of these. Cadair Idris is supposedly where one population of these hang out, the Cwn Annwn. One Aztec god was sometimes depicted as a monster with reversed feet and sometimes as a man with the head of one of these animals, Xolotl. Besides the infallible Laelaps and the loyal Argus, for 10 points, identify this animal, other example of which at Ragnarok will kill and be killed by Tyr, Garm.
[EX A]:
Social Science