Eden Hunt wrote:
I believe that the cup attracting the water might happen if the cup were charged or not (now i have to try it!). The fast moving air surrounding the water stream creates an area of low pressure into which things are attracted. If you hold a pingpong ball suspended by a string it will be drawn into the water stream and held there by this pressure gradient. Conversely if you are holding the cup so that IT cannot move into the low pressure the water, which is free to move, may be drawn into the lower pressure space. This will only work for small streams because the force on the water due to the pressure gradient will be small compared to the force of gravity on a larger amount of water.