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//consider an airfoil mounted in a low speed subsonic wind tunnel.
V=30.5;//flow velocity in test section(m/s)
D=1.225;//standard sea level density,Kg/m^3
P=1.014*10^5;//standard sea level pressure,N/m^2
P1=1.01*10^5;//pressure at a point on airfoil,N/m^2
q=D*V^2/2 //dynamic pressure,N/m^2
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