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 number is the dimension of the phase space of a free particle confined to a plane. For the Earth-Sun system, the Lagrange point of this number is the furthest from the Sun. One statement given this number describes the areal velocity of a certain system as constant. The spin projection quantum number has this many possible values. Systems with more than this number of gravitating bodies are non-integrable. The moment of inertia is proportional to mass times this power of linear dimension. This number of parallel lines represents a capacitor in a circuit diagram. For 10 points, which numbered law of Newton states that "F equals m a"
Science