$(25\%)$ Air flows at a rate of $1\mathrm{.}0k\frac{g}{s}$ through a smooth contraction in a pipe with negligible friction losses. The pressure difference between the two sections is measured by a water manometer. measured between the two vertical tubes filled with shown?

b$)10\%)$ What is the net force $(F_x)$ on the system shown

b$.(10\%)$ the locationent about the valve axis. $3.(25\%)$ A $50k\frac{m}{h}r$ wind is blowing parallel window, if the front door was left open. Assume the normal force on a $0\mathrm{.}5m$ high and $1m$ long wis $1\mathrm{.}3U_{}$ and assume air density is $1\mathrm{.}22k\frac{g}{m^3}.4.(25\%)$ Air flows at a rate of $1\mathrm{.}0k\frac{g}{s}$ through a smo the sections is measured by a water manometer.

a$)(15\%)$ If the pipe diameters are $D_1=0\mathrm{.}3m$ and $D_2$ water $($assume air density is $1\mathrm{.}22k\frac{g}{m^3}).$ measured between the two vertical the system shown?

b$)10\%)$ What is the net force $($