APFIVE Principle of Continuity for Fluids
A fluid of density ρ flows through a horizontal pipe with two sections of cross-sectional areas A₁ and A₂, where A₂ = 2A₁. The speed of the fluid in the section with area A₁ is v₁. Which of the following properties of the fluid must remain constant throughout the pipe?
A
Speed
B
Kinetic energy per unit volume
C
Pressure
D
Mass flow rate
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