19. Fluid Mechanics

In a fluid flow system, if two sections of a pipe have similar cross-sectional areas, what can be said about the flow speed in these sections according to the continuity equation ($Av=\mathrm{constant}$)?

In the context of fluid flow, what is the vertical movement of the surface of a body of water called?

If the radius of a tube carrying an incompressible fluid decreases by half, how does the fluid speed at that point change according to the continuity equation ($Av=\mathrm{constant}$)?

(II) A 6.0-cm-diameter horizontal pipe gradually narrows to 4.5 cm. When water flows through this pipe at a certain rate, the gauge pressure in these two sections is 36.5 kPa and 22.6 kPa, respectively. What is the volume rate of flow?

Which of the following terms best describes the phenomenon that involves movement on a zone of compressed air?

A long circular pipe carries an incompressible fluid with velocity $v_1$ and cross-sectional area $A_1$ at one end, and velocity $v_2$ and area $A_2$ at the other. According to the continuity equation, which of the following relationships must be true?

In the context of fluid flow along a coastline, if the water velocity increases as the channel narrows, according to the continuity equation $Av=k$, in which direction is the current moving relative to the narrowing section?

If a fluid apparatus demonstrating the $\mathrm{continuity}\mathrm{equation}$ is entirely submerged in water, would the width of the central peak in the velocity profile change, assuming the $\mathrm{flow}\mathrm{rate}$ remains constant?

If air flows through a rectangular hole measuring $2\mathrm{ft}$ by $3\mathrm{ft}$ at a velocity of $100\mathrm{ft}/\min$, what is the volumetric airflow rate through the hole?

A closed tank is partially filled with glycerin and has a small opening at the bottom. If the air above the glycerin is at a higher pressure than atmospheric pressure, which of the following best describes the speed of the glycerin as it exits the opening at the bottom, compared to if the tank were open to the atmosphere? Assume the height of the glycerin column remains the same. $v=\sqrt{\frac{2(P+\rho gh-P\_\mathrm{atm})}{\rho }}$

In a system of flow tubes with varying lengths but identical cross‑sectional areas, which flow tube length will have the greatest flow rate, assuming all other conditions are constant?

Which property of a material most directly determines how it is carried by wind in the context of fluid flow and the continuity equation ($Av\rho =constant$)?

Which of the following statements about air is correct in the context of fluid flow and the continuity equation?

Which of the following statements about fluid movement is not correct?

In a horizontal pipe where water flows steadily with negligible viscous effects, which of the following statements about the speed and cross-sectional area at two points along the pipe is correct according to the continuity equation?