Hydrostatic Pressure Explained: Why Does Water Flow & Stop?

[sameeralord]

I don't understand.

If there is a bucket of water and you put a tube inside the bucket and blow at one end and then release water flows out of the tube. Why does this happen. Also when you raise this tube water stops. Why? This is not homework or anything.

 

[YellowTaxi]

I don't understand.

If there is a bucket of water and you put a tube inside the bucket and blow at one end and then release water flows out of the tube. Why does this happen. Also when you raise this tube water stops. Why? This is not homework or anything.

Because the water is acting like a spring. Push on one end of a spring , when you release it it springs back.

It's the water inside the tube tying to stay at the same level as that in the bucket - in the same way a spring will try to keep it's end at one position before you pushed on it.