19. Fluid Mechanics

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?

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?