A plumbing branch is composed of 68' of 1" diameter Type L copper pipe, three 90-degree elbows (wrought), and a gate valve. The elevation increase is 12'. Determine the total pressure drop across the plumbing branch if it is carrying water at 45gpm. Answer in psi.

because it says use -2,0,and 2 for x, we can plug those numbers into the equation. y/4=3/4(-2)+2   y/4= -1 1/2 +2 now to get x by itself, we can multiply each side by 4. y=-6+8 which equals y=2 when x=-2. now you can do the same thing with 0 and 2 as x. you get y=8 when x=0 and y=14 when x=2.

x   |   y

-2 |   2

0   |   8

2   |   14

0.863333

86%

hope this

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more

electrical power