Physics · Fluid Mechanics

Consider a steady, isentropic, supersonic flow of air (ratio of specific heats γ = 1.4) through a duct. The variations across the cross-section are negligible. The flow conditions at Location 1 are given as: Pressure P1 = 100 kPa, Density ρ1 = 1.2 kg/m3, and Velocity u1 = 400 m/s. The duct cross-sectional area at Location 2 is A2 = 2A1. Which one of the given statements about the velocity u2 and pressure P2 at Location 2 is TRUE?