A Horizontal Section of an Artery Narrows from a Diameter

A horizontal section of an artery narrows from a diameter of 8.0 mm to a diameter of 6.0 mm. What is the pressure difference between the wider section and the narrower? That is, what is P_wide − P_narrow? The blood flows in the wider section at 48 cm/s. Take blood plasma to have a density of 1,025 kg/m³ and ignore viscosity.

A) 370 Pa
B) 255 Pa
C) 780 Pa
D) 210 Pa

Correct Answer:

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