Density
Liquid flows through a pipe of diameter 3.0 cm at 2.0 m/s. Find the flow rate.
1.4 x 10^-3 m^3/s
Two horizontal pipes are the same length, but pipe B has twice the diameter of pipe A. Water undergoes viscous flow in both pipes, subject to the same pressure difference across the lengths of the pipes. If the flow rate in pipe A is Q, what is the flow rate in pipe B?
16Q
Two horizontal pipes have the same diameter, but pipe B is twice as long as pipe A. Water undergoes viscous flow in both pipes, subject to the same pressure difference across the lengths of the pipes. If the flow rate in pipe B is Q, what is the flow rate in pipe A?
2Q
An ideal fluid flows at 12 m/s in a horizontal pipe. If the pipe widens to twice its original radius, what is the flow speed in the wider section?
3.0 m/s
A liquid has a specific gravity of 0.357. What is its density?
357 kg/m^3
An ideal fluid flows at 12 m/s in a horizontal pipe. If the pipe narrows to half its original radius, what is the flow speed in the narrower section?
48 m/s
Which one of the following is associated with the law of conservation of energy in fluids?
Bernoulli's principle
As a rock sinks deeper and deeper into water of constant density, what happens to the buoyant force on it?
It remains constant.
Which of the following is not a unit of pressure?
N/m
As the speed of a moving fluid increases, the pressure in the fluid
decreases.
Water flows through a pipe. The diameter of the pipe at point B is larger than at point A. Where is the speed of the water greater?
point B
Water flows through a pipe. The diameter of the pipe at point B is larger than at point A. Where is the water pressure greatest?
point B
Pressure is
proportional to force and inversely proportional to area.
Density
proportional to mass and inversely proportional to volume.
Which has the greatest effect on the flow of fluid through a narrow pipe? That is, if you made a 10% change in each of the quantities below, which would cause the greatest change in the flow rate?
the radius of the pipe
