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.

Input: Consider Input: Mobility is related to the zeta potential, dielectric constant, and this quantity in the Smoluchowski equation. For gases, the variation of this quantity with temperature is given by Sutherland's formula. Measured with a Zahn cup, this quantity is squared in the Grashof number, and the ratio of this quantity to thermal diffusivity is the Prandtl number. When this quantity is zero, the Euler equations correspond to the NavierStokes equations. Reynolds number is the ratio of inertial forces to this quantity, which is constant for Newtonian fluids. Measured in poise [PWAHZ], this quantity is zero for superfluids. For 10 points, name this internal friction of a fluid that tends to resist its flow.

Output: Science

Input: Consider Input: This writer distinguished between learning through description and learning through acquaintance in a work that introduces the Cartesian method of doubt with the example of a table. This man attempted to solve the problem of negative existentials in a work that claimed that "Aristotle" was not a name but a description. That work by this man also criticized Meinong and rejects the distinction between propositions and truth values proposed in (*) Frege's On Sense and Reference. This author of The Problems of Philosophy and "On Denoting" introduced his namesake paradox in naive set theory in a work that attempted to explain mathematics with axiomatic logic. For 10 points, name this British philosopher who co-wrote Principia Mathematica with Alfred North Whitehead.

Output: Social Science

Input: Consider Input: The characteristic feature of this phylum of animals is composed of a matrix of conchiolin (conk-EYE-o-lin) which binds to aragonite. The ctenidia (ten-ID-ee-uh) are a breathing apparatus in this phylum which includes periwinkles and conniwinks. The chiton (KAI-ton) is an extremely primitive member of this phylum, whose members possess a scraping feature used for collecting food called the radula (RAD-yoo-luh). Among the classes found in this phylum are cephalopods, (*) gastropods, and bivalves. For 10 points, name this class of shelled invertebrates that includes mussels and clams.
Output: Science