Our source of error can come three sources.  The First source is weather conditions.  Even though our experiment was conducted in an area that was safe from  large drafts of wind it still could be affected by the wind, even a slight breeze.  This source of error could explain some of the out standing results we recieved during some trials.  The next source of error is where the water hit the target.  The water did not always hit in the same place.  This can greatly affect the movement of the target. To try and correct this we tried to always hit the target in the sme place with out moving the angle of the hose.  The final source of error is the water pressure.  The water could have changed just a small mount or increased a samll amount which could affect the movement of the target. Even though the water was turned up to the full level each day it still changed on the final day I noticed the water to be a bit more potent.  The final source of error is that our measurments could have been of by 1 degre or so.  This could once agin affect the movement of the target  giving us innacurate measurements.