Pascal's Principle
One version of Pascal's Principle states that increases in pressure in an enclosed system are transmitted uniformly to all portions of the system. This demonstration, at Hampden-Sydney College, has a cylinder and piston to increase the pressure on the water inside. The water squirts out in all directions from the orifices at the same rate, indicating equal pressures.
   This example is at the University of Cincinnati. Both pieces of apparatus are unmarked, and both exhibit the same design flaw: some of the orifices point backward, thus soaking the demonstrator.
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