19. Fluid Mechanics

A horizontal pipe has a cross-sectional area $A_1$ at one end and $A_2$ at the other. Water enters the pipe at speed $v_1$ through the end with area $A_1$. What is the speed of the water, $v_2$, at the end with area $A_2$ according to the continuity equation?

When water flows through a horizontal pipe bend and discharges into the atmosphere, which of the following statements about the pressure at the exit ($p$, discharge point) is correct?

Which of the following best describes the effect of a blockage in the static port of a Pitot-static tube when measuring the airspeed of a fluid flow?

Which term best describes an equipment or process powered by compressed air?

When air is drawn into a wind tunnel used for testing automobiles, which principle explains why the speed of the air increases as it passes through a narrower section of the tunnel?

Which of the following actions is most likely to cause a laminar flow in a pipe to become turbulent?

A container is filled with oil and is open to the atmosphere on the left side. If the oil flows steadily from the left (point $1$) to the right (point $2$) through a horizontal pipe of varying cross-sectional area, which of the following statements about the speed of the oil at points $1$ and $2$ is correct according to the continuity equation?

If water flows through a horizontal pipe with a speed of $4.0m/s$ at point 1 where the cross-sectional area is $0.020m^2$, what is the speed of the water at point 2 where the cross-sectional area is $0.010m^2$? Assume the flow is steady and incompressible.

When water flows through a pipe that gets narrower, what happens to the speed of the water as it enters the narrower section according to the continuity equation $Av=\mathrm{constant}$?

A pitot tube is used to measure which of the following quantities in a fluid flow?

A 2.0 mL syringe has an inner diameter of 6.0 mm, a needle inner diameter of 0.25 mm, and a plunger pad diameter (where you place your finger) of 1.2 cm. A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100. The nurse empties the syringe in 2.0 s. What is the flow speed of the medicine through the needle?

According to the Bernoulli principle and the continuity equation, what causes the decrease in pressure as water flows through a hose that narrows in diameter?

A vertical jet of water leaves a nozzle with speed $v_0$ and cross-sectional area $A_0$. As the jet rises to a height $h$ above the nozzle, what is the cross-sectional area $A$ of the jet at that height, assuming incompressible, non-viscous flow and neglecting air resistance?