where does irragation water come from?
930144
Canals which comes from a bigger "pool" of water.\n\nIrrigation water around here gets bug poison put into it, therefore not healthy to swim in and heavens for bids drink! Ours come from the Ochico Mountain range...
194414
Water is denser than air and transfers heat more rapidly.
1097925
yes... it's called reverse osmosis.\n\nBasically it pushes the sea water through a filter that doesn't allow the salt to pass.\n\nAlso there is turning the water into steam and then condensing it into liquid again.  This leaves the salt behind as it is converted to steam.\n\nDesalinization is usually expensive and not very efficient either.
303761
Did you ever wonder why the oceans are filled with salt water instead of fresh? Just where did the salt come from? And is it the same salt you find on a dining room table? Most of the salt in the oceans came from land. Over millions of years, rain, rivers, and streams have washed over rocks containing the compound sodium chloride (NaCl), and carried it into the sea. You may know sodium chloride by its common name: table salt! Some of the salt in the oceans comes from undersea volcanoes and hydrothermal vents. When water evaporates from the surface of the ocean, the salt is left behind. After millions of years, the oceans have developed a noticeably salty taste.\n\nDifferent bodies of water have different amounts of salt mixed in, or different salinities. Salinity is expressed by the amount of salt found in 1,000 grams of water. Therefore, if we have 1 gram of salt and 1,000 grams of water, the salinity is 1 part per thousand, or 1 ppt.\n\nThe average ocean salinity is 35 ppt. This number varies between about 32 and 37 ppt. Rainfall, evaporation, river runoff, and ice formation cause the variations. For example, the Black Sea is so diluted by river runoff, its average salinity is only 16 ppt.\n\nFreshwater salinity is usually less than 0.5 ppt. Water between 0.5 ppt and 17 ppt is called brackish. Estuaries (where fresh river water meets salty ocean water) are examples of brackish waters.\n\nMost marine creatures keep the salinity inside their bodies at about the same concentration as the water outside their bodies because water likes a balance. If an animal that usually lives in salt water were placed in fresh water, the fresh water would flow into the animal through its skin. If a fresh water animal found itself in the salty ocean, the water inside of it would rush out. The process by which water flows through a semi-permeable membrane (a material that lets only some things pass through it) such as the animal's skin from an area of high concentration (lots of water, little salt) to an area of low concentration (little water, lots of salt) is called osmosis.\n\nThis is also why humans (and nearly all mammals) cannot drink salt water. When you take in those extra salts, your body will need to expel them as quickly as possible. Your kidneys will try to flush the salts out of your body in urine, and in the process pump out more water than you are taking in. Soon you'll be dehydrated and your cells and organs will not be able to function properly.
27398
You can observe this yourself by breathing on a mirror. As the condensation evaporates from the mirror, you have completed the water cycle. Water evaporates into the atmosphere from the ocean, lakes, rivers, and from soil and plants, and even from your skin and breath. When the air reaches saturation (100% humidity) due to cooling or changes in atmospheric pressure (or both) the water condenses  from vapor to liquid (or solid) and falls to earth as rain, snow, sleet, hail, or maybe only as dew. This water may then form streams and rivers and return to the ocean where it may evaporate again into the atmosphere or it may sink into the earth where it becomes groundwater that may take many thousands of years to emerge again, or may be pumped to the surface from a well and used for drinking water or irrigation. It is a continuous cycle that may take only seconds or may take thousands of years to complete the cycle depending on the path of the water.   \n\nWhy do I get the feeling I'm answering your homework question? Now if you'd asked about delta O18 (a heavy isotope of oxygen) I could have told you how the water cycle concentrates water composed of hydrogen and heavy oxygen atoms and how this is used to study paleoclimates using ice cores and sea shells. Have a good day.
937218
ice is converted to water and water to gas.
818715
any help?\nhttp://www.gdrc.org/uem/water/mexsaade.htm\nor:\nhttp://msucares.com/pubs/publications/p1939.htm\nor:\nhttp://www.ehponline.org/docs/2002/110-10/ss.html#diar\nor:\nhttp://www.uswaternews.com/archives/arcglobal/6mexfre.html\n\nhope something is useful!
286607
why do we pay $1 for 16 oz. of the most abundant resource on earth? because they've polluted most of the free flowing water. i figure there's somebody out there just filling up bottles with tap water and selling it and making a killing! but i still buy my water in bottles. at least the price of gas fluctuates!
861405
New York City's water comes from lakes in the mountains of upstate New York.  It is held in resevoirs (such as the Croton Reservoir) north of the city and transported throughout the city via a tunnel system.
40258
Some models in addition utilize compressed air to atomize  the water.  Most though simply utilize fogging high pressure mist into freezing air.  Collision in the air of two streams of water is another means of breaking the water into small dropletts which will freeze before hitting the ground, this actually requires less energy on the parts of the electric pumps ie lower pressure and higher volume of flow.
873513
"Ocean water is  a complex solution of mineral salts and of decayed biologic matter that results from the teeming life in the seas. Most of the ocean's salts were derived from gradual processes such the breaking up of the cooled igneous rocks of the Earth's crust by weathering and erosion, the wearing down of mountains, and the dissolving action of rains and streams which transported their mineral washings to the sea. Some of the ocean's salts have been dissolved from rocks and sediments below its floor. Other sources of salts include the solid and gaseous materials that escaped from the Earth's crust through volcanic vents or that originated in the atmosphere."
195964
Water is one of those elements that was here from the start.  Some say it was created by God, some say it was part of some cosmic big bang that started everything.  Either way, it's formed by oxygen and hydrogen forming molecules.  One of oxygen and two of Hydrogen.  You can separate them by putting wires on a flashlight battery and sticking the wires in water.  One wire will generate oxygen bubbles, the other will generate hydrogen bubbles.  With enough hydrogen, you could make your own Hindenburg disaster.
163942
food water air reproduction
552084
I assume this is based on the principle of Osmosis. I would like a bit more data before answering further.
617642
Bubbles form from the dissolved gases in the water.
975456
a well, electromechanical extraction. at current usage, long after i am gone, save a catastrophic duought.\nalternatives are hooking to city water.\n\nour conservation across america is absolutely lousy.\n\nstart looking for ways to use membrane absorbtion from the atmosphere, use power plants to cogenerate potable water, restrict the use of water at every household by 10%, and decrease deliverys until we use half what we do now.\nwater from washers can be used to water lawns, showers can be shorter. washing your car can be done with less than 5 gallons of water. we are not conservation minded, and it will hurt us.\nif you  look at the growth in the southwest, they are running on a water deficit and they still build.\nthe ogalalla aquafer, on of the larges in the world is being depleted. when that goes midwest irragation goes. the midwest is the bread basket of the us and a source of our agracultural surplus that we use for balance of payments.\n\nget pissed, and start making "campaign contributions" to our federal elected officials.\nin america campaign contributions are our form of bribery.\nif that doesn't work try a land swap with nature conservatory or antoher organization.
387296
There are multiple ways to separate sand and water.  If you need the sand, you evaporate the water away.  If you need the water, you run it through a filter.  If you need them both, a centrifuge can fairly completely separate them by allowing the sand to be forced to the bottom.