Different values of this quantity for a nucleus at minimal energy is used to find the Yrast.  
Different values of this quantity for a nucleus at minimal energy is used to find the Yrast.  When coupling of this quantity occurs, Clebsch-Gordan coefficients are produced.  One property of this gives rise to Kepler's Second Law, also known as the law of equal areas, and that same property of this quantity about the z axis is explained in Noether's Theorem.  One definition of this quantity is the product of the moment of inertia with the angular velocity, while it is also equal to r cross p.  It explains why a spinning gyroscope does not fall over.  For 10 points each, identify this conserved quantity, often symbolized L.
Different values of this quantity for a nucleus at minimal energy is used to find the Yrast.  
{Angular Momentum}