Fluid Flow: Ideal incompressible fluid flows through a 4.0-cm-diameter pipe at 1.0 m/s. There is a 2.0 cm diameter constriction in the line. What is the speed of the fluid in this constriction?
A. 0.25 m/s
B. 0.50 m/s
C. 2.0 m/s
D. 4.0 m/s
Answer: D
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