//Acceleration due to gravity(in ft/sec^2):
g=32.2;
//Specific gravity of mercury:
SGm=13.6;
//Specific gravity of oil:
SGo=0.88;
//Specific gravity of water:
SGw=1;
//Density of water(in slug/ft^3):
d=1.94;
//Heights of liquid in various tubes(in inches):
d1=10;
d2=3;
d3=4;
d4=5;
d5=8;