F h2 igh nal ket. c of in tion 2 is very um- arge e at of 12.94 .. The horizontal pipe shown in Fig. P12.94 has a cross-sectional area 40.0 cm at the wider portions and 10.0 cm at the constric- tion. Water is flowing in the pipe, and the discharge from the pipe is 6.00 x 10-3 m/s (6.00 L/s). Find (a) the flow speeds at the wide and the nar- Figure P12.94 40.0 cm 10.0 cm row portions; (b) the pressure difference between these portions; (c) the difference in height between the mercury columns in the U-shaped tube. 12.95 A liquid flowing from a vertical pipe has a definite shape