$12\mathrm{.}5\mathrm{.}3$ Solve example $12\mathrm{.}5\mathrm{.}3$ using a pump speed of $1500rpm.$

EXAMPLE $12\mathrm{.}5\mathrm{.}3$

EXAMPLE $12\mathrm{.}5\mathrm{.}3$

Two reservoirs A$,$ and B$,$ are connected by a long pipe that has characteristics such that the headloss through the pipe is expressible as $h_L=20(\frac{Q}{100}{)}^2,$ where $h_L$ is in feet and $Q$ is the flow rate in gpm$.$ A single pump with the head$-$capacity curve for $1800rpm$ given below is used to pump the water from A to B$.($a$)$ For the single pump, plot a curve showing delivery rate versus difference in elevation, $z,$ for $Z$ ranging from $-20$ to $+80ft.($b$)$ Repeat for a rotative speed of $2160rpm.$

$\backslash$table$[[$Head $($ft$),$Flow rate $(gpm)$