น้ำสีไหลเป็นเส้นเดียว
From experiment can find flow rate with venture meter by use disparity of pressure for calculate flow rate from equation Q = CA_2 √((2g(h_1-h_2))/(1-〖(A_2-A_1)〗^2 )) due to C is solve coefficient as practice will have power loss at position 1 and position 2 therefore in the real flow rate will less than ideal flow rate that solve coefficient will be in the 0.92 - 0.99