Momentum. :]
Water can defy the force of gravity and flow uphill. This is possible when a device called a hydraulic ram is used. A wick action such as a rope can cause the water to flow uphill.
No, water cannot flow uphill in a pipe without the assistance of a pump or other external force.
water cannot flow uphill
Water can flow up hill if there is some sort of machine that is able to pull it. Water does not naturally flow up hill it always flows downstream due to gravity.
Water obviously doesn't flow uphill, but if there is a lot of water in something like a valley, it will rise up the hill on either side, so in that way it can go uphill.
The Nille River flows uphill
No you can't make water go uphill for 1600 miles
Water does not run uphill because it follows the laws of gravity. Gravity pulls objects, including water, towards the center of the Earth, causing it to flow downhill in the direction of lower elevation. This natural phenomenon is what determines the direction in which water flows.
Uphill
They could in theory.
Down hill, Think of it, Niagara Falls, the water is falling downhill, Niagara's water comes from St. Lawrence Seaway.
You can run water uphill with a garden hose by decreasing the size of the hose as it moves away from the water source. By decreasing the hose size, pressure in the hose increases and the water will travel uphill.