TASK DEFINITION: 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.
PROBLEM: A paper he wrote about the geometrical representation of a certain kind of property by means of surfaces so excited Maxwell that he made a model illustrating the method. During the early 1880s, this man worked on a modification of the quaternion which he thought could be adapted into a new system of vector analysis, but it had little impact. He developed an "electrical theory of light" which presumed that light is a disturbance propagating through relatively fine-grained media, while his last work was a treatise on Elementary Principles in Statistical Mechanics which he completed a year before his death in 1903. His greatest discovery was popularized by the Dutch scientist who experimentally confirmed it, Hendrik Roozeboom. His most famous work was translated by Le Chatelier and Ostwald, and established a basis for the theory of the thermodynamic properties of heterogenous substances. FTP, name this founder of physical chemistry, an American scientist known for his namesake phase rule.

SOLUTION: Science

PROBLEM: One king of this name and number married Joan of Navarre and fended off the "Epiphany Uprising. " Another king by this name and number had Maximilian de Bethune, Duke de Sully negotiate the Peace of Savoy, but was assassinated by Francois Ravalliac. Yet another ruler of this name and number dealt with the rise of anti-king Rudolf of Swabia, and had installed Clement III as pope, though he had earlier traveled to Canossa to reconcile with Pope Gregory VII. For 10 points, identify this name and number shared by the Holy Roman Emperor involved in the Investiture controversy as well as the Bourbon king of Navarre who declared that "Paris is worth a Mass. "

SOLUTION: History

PROBLEM: He expounded his views on agapasm, synechism, and tychism in a series of articles published in The Monist that included "Man's Glassy Essence". In "Some Consequences of Four Incapacities" he argued against Cartesian skepticism, though his best known articles appeared in the Popular Science Monthly starting in 1877 and included "The Fixation of Belief" and "How to Make Our Ideas Clear". FTP, name this American philosopher, a pioneer of semiotics who founded the philosophical movement known as pragmatism.

SOLUTION:
Social Science