For flows displaying this property, the Navier–Stokes equation reduces to Burgers’s equation. The pressure is often described as a Lagrange multiplier that enforces this property, which causes the Langevin (“lanj-VAYN”) equation to contain a transverse projection operator. The n equals zero polytrope has an interior with this property. An approximation (-5[1])named for a pseudo (-5[1])form of this property can be derived solely by assuming small pressure perturbations. (-5[1])The simplest form of Bernoulli’s principle applies to flows with this property. Flows (10[2])with this property have small values of [read (-5[1])slowly] “one over density times the derivative of density with respect to pressure,” which (10[1])is (10[1])denoted beta. The divergence of (10[1])the velocity (10[1])is zero (10[1])in (10[1])flows (10[2])with (10[4])this property, as is the time derivative of density. For 10 points, name this property of fluids with a (10[1])constant (10[5]0[3])density. ■END■