This quantity’s transfer rate divided by the product of area and the driving force concentration difference equals this quantity’s “transfer coefficient,” denoted k sub c. Choked flow imposes a limit on this quantity’s time derivative. The equation (read slowly) (0[1])“d rho d t equals negative rho times the divergence of u” describes the conservation of this quantity in the Euler equations of fluid dynamics. The logarithm of the ratio of this quantity’s (*) “wet” and (10[1]0[2])“dry” (0[2])forms appears (0[1])in (10[1]0[1])the Tsiolkovsky (0[2])rocket equation. (10[1])This quantity (10[1]0[1])is conserved (10[1])in (0[3])closed systems. An object sinks in (0[2])a fluid if the acceleration due to gravity times this quantity is greater than (10[2]0[1])the weight of fluid displaced. For (0[1])10 points, name this quantity equal to density (10[7]0[2])times (10[15]0[4])volume. ■END■