Water Flows Through a Horizontal Pipe of Cross-Sectional Area 10

Multiple Choice

Water flows through a horizontal pipe of cross-sectional area 10.0 cm² at a pressure of 0.250 atm with a flow rate is 1.00 L/s.At a valve,the effective cross-sectional area of the pipe is reduced to 5.00 cm².What is the pressure at the valve? The density of water is 1000 kg/m³,and treat it as an ideal incompressible fluid.

A) 0.110 atm
B) 0.235 atm
C) 0.200 atm
D) 0.157 atm
E) 7700 Pa