Fluid Flow: Water, which we can treat as ideal and incompressible, flows at 12 m/s in a horizontal pipe with a pressure of 3.0 × 104 Pa. If the pipe widens to twice its original radius, what is the pressure in the wider section?
A. 3.0 × 104 Pa
B. 4.9 × 104 Pa
C. 7.4 × 104 Pa
D. 9.8 × 104 Pa
Answer: D
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