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2007-02-21 09:47:11 · 9 answers · asked by pookie442006 1 in Environment

9 answers

Because it is easier to pump water up there and store it, then let gravity provide the downforce to provide water (even during power outages).

2007-02-21 10:09:55 · answer #1 · answered by Anonymous · 0 1

Hydrostatic pressure is simply what happens when the force of gravity pulls down on a liquid (water for example) while this liquid sits still (or is held back on purpose). This is happenning all the time, because gravity is always there. So if you look around you for places where a liquid is sitting still you will see: 1. Lakes
2. Oceans 3. Big water tanks 4. Dams 4. A glass of water

Because liquids are pulled down by gravity, the more liquid you have, the heavier it is, since it has a greater mass. If it wasn't for a barrier holding the liquid, it would spill over. This tendency to spill over is one of the many effects we can see from hydrostatic pressure. Although, spilling things is not very useful...But one useful application would be to use this force to do work. To do
work, you will first hold the liquid back into a tank or dam. Some time later you will have to let some of the liquid move, so it will not always be static. Another way to use hydrostatic pressure, is by building a water tank that is sitting very high up. Some towns put their drinking water tanks at the top of a mountain or at the top of a tower. That way, the hydrostatic pressure will push water to the houses of people, with little or no help from mechanical pumps.

2007-02-21 19:01:59 · answer #2 · answered by Anonymous · 0 0

Water towers are above ground to produce the hydrostatic pressure necessary to push water through the distribution system. Water needs to overcome the friction loss and elevation loss (look up the Energy equation) to move in the system. Engineers found that continuous pumping could provide this energy, but good ole' hydrostatic pressure was free (minus the pump energy to get it into the tower) and once you pumped the water into the tower it pressurized the whole system. The other answers that mention gravity are partially correct as hydrostatic pressure is the combination of the weight of water multiplied by the force of gravity.

2007-02-21 18:40:58 · answer #3 · answered by Aloha Jim 2 · 0 0

Water flows down hill. If your house is higher than the water tower, water would flow from your taps to the tower rather than other way around.

2007-02-21 17:56:48 · answer #4 · answered by davidbgreensmith 4 · 0 0

Have you ever seen water rise from under the ground?

That would be awesome! But it would break the law of gravity...

Guess it's the only way to pump de water man, you feel me?

2007-02-21 18:58:58 · answer #5 · answered by Anonymous · 0 1

they are build high up so that the water has the presure of gravity flow,for the systems ,with out using pumps

2007-02-23 01:48:26 · answer #6 · answered by Anonymous · 0 1

So water can flow downward by gravity.

2007-02-21 17:55:37 · answer #7 · answered by acafrao341 5 · 0 1

because in ground they are called resevours and underground they are called aquafirs. thats why.

2007-02-21 17:59:32 · answer #8 · answered by Patrick M 4 · 0 1

gravity

2007-02-21 17:56:39 · answer #9 · answered by Parercut Faint 7 · 0 1

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