//Stagnation temperature(in K): T0=296; //Stagnation pressure(in mm of Hg): p0=760; //Gauge pressure at section 1(in mm of Hg): p1=-18.9; //Gauge pressure at section2(in mm of Hg): p2=-412; //Mach number at 3: M3=1; //Gas constant: R=287; //Density of mercury(kg/m^3): dHg=13500; //Acceleration due to gravity(in m/sec^2): g=9.8; //Friction factor: f=0.0235; //Diameter of tube(in m): D=7.16*10^-3; //Value of k: k=1.4;