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]: Lin and Shu proposed the density-wave theory to explain how the structure of these entities is sustained. The most accurate method for measuring the distances to distant ones uses a relation between their maximum rotational velocity and absolute magnitude, which is known as the Tully-Fisher method. They are generally blue because of their high content of old stars, and one type of them features arms that emanate from each end of a namesake structure. They have discs like the lenticular type, but contain much more angular momentum than the elliptical type. FTP name these galaxies, some of which are barred, including the Milky Way.
[EX A]: Science

[EX Q]: A member of the Alcmaeonid family he was born under a family curse incited by his great-grandfather. Peisistratus exiled him and his family, but he returned twenty years later, and during the reign of Hippias convinced the Delphic oracle to tell Sparta to help overthrow the tyranny. Gaining power in 510, he broke the traditional aristocracy, instituting a system of the ten tribes of Attica.. FTP,  identify this Athenian tyrant who created the council of 500 in order to favor equal rights for all citizens.
[EX A]: History

[EX Q]: The optical or refractive type of this quantity is measured in diopters and measures the ability of a device to focus light. A non-standard unit for this quantity is the ton of refrigeration, and in systems with flow, it is equal to the product of flow rate and pressure. Radiative intensity or energy flux is defined as luminosity or this quantity per unit area. In rotational systems, it can be calculated as the dot product of torque and angular velocity, while in kinematics it is simply given by force times velocity. For 10 points, name this physical quantity equal to the work done per unit time, often measured in Watts.
[EX A]:
Science