Teacher: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.
Teacher: Now, understand the problem? Solve this instance: The Debye-Sears effect concerns materials exhibiting this effect that are placed in a liquid and vibrated at a fixed frequency, in which they set up acoustic waves. Trigonal crystals exhibiting it are especially useful in the eponymous oscillator. The reverse version of the effect is also useful, and occurs when a potential difference is applied to materials that exhibit it, such as barium titanate, Rochelle salts, and quartz. FTP, what is this effect, the generation of a potential difference in certain non-conducting crystals that are subjected to stress
Student:
Science