PhysicsLAB AP Free Response Question
2008 Form B - B4

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A fountain with an opening of radius 0.015 m shoots a stream of water vertically from ground level at 6.0 m/sec. The density of water is 1000 kg/m3.
 
 (a) Calculate the volume rate of flow of water.

 (b) The fountain is fed by a pipe that at one point has a radius of 0.025 meters and is 2.5 meters below the fountain’s opening. Calculate the absolute pressure in the pipe at this point.

 (c) The fountain owner wants to launch the water 4.0 meters into the air with the same volume flow rate. A nozzle can be attached to change the size of the opening. Calculate the radius needed on this new nozzle.




 
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