$11\mathrm{.}47$ Figure P$11\mathrm{.}47$ shows a part of a chemical processing system in which propyl alcohol at $25C$ is taken from the bottom of a large tank and transferred by gravity to another part of the system. The length between the two tanks is $7\mathrm{.}0$ m $.$ A filter is installed in the line and is known to have a resistance coefficient $K$ of $8\mathrm{.}5$ based on the pipe velocity head. Drawn stainless steel tubing is to be used. Specify the standard size of tubing from Appendix G$.2$ that would allow a volume flow rate of $150\frac{L}{m}$

$11\mathrm{.}7$ A liquid refrigerant flows through the system, shown in Fig. P$11\mathrm{.}7,$ at the rate of $1\mathrm{.}70\frac{L}{m}in.$ The refrigerant has a specific gravity of $1\mathrm{.}25$ and a dynamic viscosity of $3{10}^{-4}Pa*s.$ Calculate the pressure difference between points A and B$.$ The hydraulic tube is drawn steel, with an outside diameter $($OD$)$ of $15$ mm $,$ a wall thickness of $1\mathrm{.}5$ mm $,$ and a total length of $30$ m $.$

IGURE P$11\mathrm{.}7$ Refrigerant tabing for Problem $11\mathrm{.}7.$