Detailed Instructions: 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:The gyromagnetic ratio of an electron is equal to the magnetic moment divided by this quantity. Its operator is equal to negative i h bar times r cross the gradient. The quantum number j corresponds to the total value of this. Its conservation is a consequence of the isotropy of space. Its derivative with respect to time is torque and Kepler's second law follows from it being conserved. It is equal to the product of moment of inertia and angular velocity. For 10 points, name this rotational version of momentum.
Solution:
Science