Given the task definition and input, reply with output. 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.

This quantity is given by the Vogel-Fulcher-Tammann equation near the glass transition temperature. This quantity is given as lambda times T to the three-halves over T plus Sutherland's constant in one model. Dashpots are combined with springs to model systems for which its contributions matter at the same conditions as elasticity, such as the Kelvin-Voigt model, which accurately measures polymer creep. It decreases following the sustained application of sheer stress for thixotropic materials. The contributions of this quantity is negligible when the Euler equations apply and when the Reynolds number is large. This quantity is constant for Newtonian fluids. For 10 points, name this quantity, which is zero for superfluids.

Science