How are dams and hydrostatics related?
145436
A dam holds water in place (hydrostatics, fluid statics)  Hydraulics has more to do with what happens when you change the size of a pipe.
1126388
Surface tension and elasticity of the water are just about the same thing, for all practical purposes. The water can not get out of the way fast enough to let the stone sink before the motion and deflection cause the stone to bounce. The gyroscope motion of the stone is what gives it enough balance to not lose much of it's momentum when it hits something, like water. That's why flat, smooth stone work best.
942928
All substances, gases, solids, and liquids, including water, are compressible. Some \nsubstances just require more pressure per change in volume to compress than others. The \nnumerical value of the compressibility depends both on the temperature and on the pressure \ntoo. That is how hard you have to squeeze at one pressure to obtain a certain fractional \ndecrease in the volume is different than at some other pressure. The same for two different \ntemperatures. Under most "normal" lab conditions however solids and liquids are usually \nconsidered to be incompressible.\n\nTechnically speaking, water can be compressed, but very little even at high pressures.  For \npractical design purposes, water is considered an incompressible fluid, that is, its density \ndoes not change with pressure.  The reason anything is compressible is due to how close the \natoms are packed together.  If you think about air, it is highly compressible because there \nis considerable spacing between the atoms, so it is relatively easy to force the atoms closer \ntogether.  When you have a liquid, the atoms are much closer together and considerable \npressure is required to make them any closer.  Solids will compress some as well, but it \ntakes significant pressure.  Temperature also plays a factor in density (and thus \ncompressibility), just ask your chemistry teacher about the ideal gas law.\nI am not sure what your book was using a "water compression system", but hydraulic systems \nare used almost everywhere to transmit power across a system.  What a hydraulic system does \nis put a liquid (usual an oil of some type) under pressure, route that pressurized liquid \nthrough pipes or hoses, and releases the pressure at a place where work needs to be done, \nusually through a motor or cylinder that transfers the pressure into work.  You might want \nto research on hydraulic systems (hydraulic lifts, hydraulic elevators, etc.) to get a better \nunderstanding on how energy can be transferred around in a hydraulic system.
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Voltage is the power potential.  Current is the speed and power at which that voltage goes through a given medium.  \n\nThink about this, Hoover dam.  It has inordinate amounts of potential.  If it sprung a small leak at the top and shot out watter, the force of that wouldn't be much at all to hurt you.  But, if you blew an 8 foot wide hole at the bottem of the dam, the force of the water would disentegrate you in an instant.\n\nElectricity was a very difficult concept for me to get.  However, when you start comparing it to something that is easy to see, touch, and feel, then it helps a lot.  Water is a perfect analogy in many ways.
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Dam, known as Marib dam, is one of the most ancient dams in the world.  I believe that the dam was rebuilt by USSR or USA funding within the last 20 years, but the more ancient part was preserved. \nEven if the whole dam was preserved, the resvoir would not be incredibly large. The dam collects runoff water from rain, and as it is well known, it does not rain that much.
561732
water displacement and boyles law of bouyancy
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There are many ways to do this problem.  The best way to probably handle density, and perhaps mass even, is using Archimedes principle of buoyancy.  You can find a detailed discussion on www.wikipedia.com and search for Archimedes or buoyancy.  The main idea is that "the weight of the displaced fluid is directly proportional to the volume of the displaced fluid".  \n\ngood luck!
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At the top of the Dam, the water has 100% of its energy <or if you prefer energy per second - that is power >\n\n87% of power <=> 1900 MW\n100% of power <=> 2184 MW\n\nAt the top of the Dam, the potential energy the water possesses is what can be ideally converted into 100% power.\n\nDensity of water = 1000 kgm^-3\n\nLet the mass of water be y kg\nPotential energy of water = y * 9.80 ms^-2 * 170 m \n                                         = 1666 y Joules\n\nEach second it can deliver 1666y Watt of energy\n\nThat is 1666y W <=> 2, 184, 000, 000 W\n                           y = 1310924 Kg of water each second\n\nUsing density of water, above, each second, 1311 m^3 of water must flow from the top of the dam\n\nYour answer is ultimately 1311m^3/s\n\nI just love those physics exercises, feel free to contact me. I am a student in Science subjects
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Dams and levees change the course of rivers.  Farmig, forestry, and suburban development lead to erosion.  Mining can change the forms of mountains.
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In the steady state, water flows out of the aqueduct, leaving the force on the floor&walls unchanged. However, then the barge is first introduced, the displaced water flows as a wave, causing greater forces near the wave-front.
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Pascal's principle : Pressure applied to an enclosed fluid is transmitted undiminished to every part of the fluid, as well as to the walls of the container.  \nAn example: hydraulic lift.
412802
p=F/A \n\nSo, you have the pressure of the atmosphere pluss the weight of the water above you.  Which is usually figured as a cylinder.  Hope that helps.
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Capillary forces and water potential.  The water potential is the tendency of water to move from one place to another, due to evaporation or stuff dissolved in the water.
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Isobars link locations with constant pressure, isotherms do the same for temperature
204484
the reciprical theory of the water preasure gravitational pull, and the massive weight of the dam wall
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electricity or power obtained from moving water\nmainly from dams and tide power plants
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All dams have various levels of natural strength and safety. All types of dams have also suffered catastrophic failures.\nThe best example I can give you of a concrete dam failure is the St. Francis Dam in southern California, 1928. It was a concrete Gravity Arch dam about 200 feet high. It failed under a full reservior, due to the re-activation of an ancient landslide that composed the dam's left abutment. However, it's twin sister, the Hollywood (Mulholland) Dam, after retrofitting in the early 1930's, has stood strong to this day.\nEarthen dams have also failed, such as the Teton Dam in the 1970's.\nThe Van Norman Dam in the San Fernando Valley (rolled earth fill dam) collapsed during the 1971 Sylmar quake, but didn't fail. It held it's water long enough for emergency crews to lower the water level to a safe point, saving many lives and homes.\nThe biggest safety concerns for concrete dams are:\n1. Is the concrete of sufficient strength, with a well-cleaned aggregate?\n2. Is the foundation sound?\n3. What kind of siesmic activity can be expected in the area?\n4. Are there sufficient seepage galleries and grout curtains to control excess water and prevent piping?\n\nIf you're comparing concrete dam types, I'd say an arch dam is at least as safe as a concrete gravity dam (such as Shasta) provided it has firm rock to brace against.\n\nBasically, a dam is a wall that creates an entire lake behind it. Water is very heavy, and will always try to escape. So, as safe as they try to build them, that safety is always tenuous at best. \nCheck out my website on the St. Francis Dam, at...\nhttp://www.geocities.com/zeebya/integintro.html