//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;