Answer:
[tex]\frac{dP}{dn}= - 0.6924[/tex]slug\ft2 s2
Explanation:
data provided:
radius along which air flow = 22 ft
speed of streamline v = 80 ft/sec
we know that[tex]-\gamma \frac{dZ}{dn} -\frac{dP}{dn} = \frac{\rho v^2}{R}[/tex]
[tex]\frac{dZ}{dn} = 0[/tex]As stream line is horizontal
[tex]\frac{dP}{dn} = - \frac{\rho v^2}{R}[/tex]
[tex]\rho \ of\ air = - 0.00238 slug\ft3[/tex]
[tex]= - \frac{-0.00238*80^2}{22}[/tex]
[tex]\frac{dP}{dn}= - 0.6924[/tex]slug\ft2 s2
