Question

This quantity defines the threshold at which optimality is achieved by the Von Kármán ogive ("OH-gyve"), which is a special case of the Sears–Haack body. This (0[1])quantity (0[1])is calculated from the displacement (20[1])of powder in a (20[1])common classroom experiment involving the Kundt's tube. (20[5]0[1])For an ideal gas, (20[1])the square of this quantity equals the (20[1])heat capacity ratio times R (0[1])T. This quantity equals the negative-one-half (0[1])power of the product of density (*) isentropic compressibility in the Newton–Laplace equation. (0[1])The prefixes "hyper," "trans," (10[1])and "super" (10[1])describe flows in which this (10[1])quantity is exceeded. (0[2])This quantity is 343 (10[3]0[1])meters (10[2])per (10[1])second (10[6])in air. (10[1]0[1])For 10 points, (10[2])name this quantity that is matched (10[1])by a projectile traveling at Mach one. (10[2])■END■ (10[6])

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