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.

Q: A hypothetical method of decay for these particles involves breaking into a positron and a neutral pion and would have a half-life on the order of 10 to the 35 years. In astronomy, these particles are employed in a namesake chain located in the cores of stars in order to synthesis lighter elements. Particles of this type are typically composed of two up quarks and a single down quark and these particles make up about 90% of all cosmic rays. Discovered by Ernest Rutherford, for 10 points, identify this subatomic particles that contributes the positive charge of an atoms nucleus.

A: Science
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Q: In one of this artists canvases, models for his most famous painting are shown dressing in front of that painting. For other, he replaced his own self-portrait with a pot of flowers in the background of a painting of his mistress, Madeliene Knoblock. This painter of Poseuses and Young Woman Powdering Herself was educated at the cole des Beaux-Arts, but helped to form the Society of Independent Artists after panels from his Bathing at Asnires were rejected by the Paris Salon. His most famous style was developed with the artist of The Port of Saint-Tropez, Paul Signac; he eventually used this style to depict Parisians, along with a monkey and two dogs, relaxing in a riverfront park. Name this Neo-Impressionist artist known for his use of pointillism in his masterpiece, A Sunday Afternoon on the Island of La Grande Jatte. "

A: Fine Arts
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Q: Its intramolecular form is called the Dieckmann cyclization and produces either five- or six-membered rings. Its crossed form, common in the biosynthesis of fatty acids, only takes place if one its reactants has no alpha-hydrogens. In its intermolecular form, it begins with an acid-base reaction between a formation of an ester enolate by an alkoxide base. The enolate acts as a nucleophile and attacks the carbonyl carbon of another ester molecule. The resulting tetrahedral intermediate collapses to give the final product, a beta-keto-ester. FTP, name this reaction, the ester analogue of the aldol condensation.

A:
Science
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