We were not able to get this far in class, but skim through these notes - you will see this type of problem in fluid mechanics and thermodynamics.
Again, we did not make it this far, but if you want to play around with a simulation, see below!
Simulation:
http://phet.colorado.edu/en/simulation/fluid-pressure-and-flow
Create an equation that describes the difference between the inlet and outlet speed of the fluid as a function of the change in the pipe diameter, the flow rate, the fluid density, and pressure.
Does it matter how quickly the pipe diameter is changed?
Research how refrigerators work. How can you use the changing pressure in a fluid to heat or cool something?
Read about Joule-Thomson valves, explain how they work, and what fluids they work best with.
