Hi, I'm trying to get the rig for my physics project set up which requires some constant water flow through the system. Unfortunately it's requiring a bit more water inflow than the tap can provide. I measured the tap's flow rate to be somewhere around 0.1L/sec to 0.3L/sec Now because I don't want to invest in a water pump I'm planning to create some quick and dirty device to provide a bit more flow. I'm thinking of a reservoir of water (probably just a bucket) with a hole in the bottom. Now if I raise the bucket to sufficient height above my expermental device and let the water flow through the hole vertically into my rig, I might be able to get enough flow rate. But I have no idea if this is even practical. I meant I don't know how high I have to raise the bucket to and if it's going to even provide higher flow rate than the tap. So let's say if the hole at the bottom of the bucket is half an inch diameter, how can I calculate the flow rate of water when I raise the bucket to height h above the system? (Presumably the flow rate will change along the stream due to gravitation acceleration so I would appreciate the mathematical explanation for it too if possible) I meant I otherwise understand things in physics but fluid dynamics stuff just confuse me a bit. Oh and also, is there any direct way of calculating the force/pressure/momentum of a flowing stream of water? Say if I have a water stream flowing, assuming completely uniformly with no surface friction or viscous drag, at a some rate Phi L/sec so I can quite easily convert that into some flow velocity v ms-1 given the surface it's flowing through using the flux integral. Now if some random object is placed at that surface and obstructs the flow, what force would the water flow exert on the object? Thanks!