This quantity is written as the sum of reversible and irreversible terms in the Jiles–Atherton model. The time derivative of this quantity equals: [read slowly] a constant, times a damping parameter, times this quantity crossed with its time derivative, all plus a precession term. The Stoner–Wohlfarth model describes rotation about the “easy axis,” (10[1])the energetically favorable orientation (10[1])for this quantity to spontaneously appear. The Landau–Lifshitz–Gilbert equation predicts the evolution of this quantity, whose curl is the bound current density. (10[1])The (10[1])intrinsic coercivity (-5[1])is the applied field needed to reduce this quantity to zero, (10[1])while the amount of (10[1])this quantity when there is no applied field is called remanence. (-5[2])This quantity (10[1])plus the H-field equals the (-5[1])B-field over (-5[1])mu-naught. For 10 points, what quantity is the magnetic moment per unit volume? ■END■ (10[3]0[9])