Fluid Flow: Ideal incompressible water flows through a horizontal pipe of cross-sectional area 10.0 cm2 at a pressure of 0.250 atm with a volume flow rate of 1.00 × 10-3 m3/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?
A. 0.112 atm
B. 0.157 atm
C. 0.200 atm
D. 0.235 atm
Answer: D
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