with out motors, how did the ancient water fountains work?
360345
The water supply was at a higher elevation than the fountain, which created pressure. It's the same principle as community water towers of today.
790687
The burning of the fuel (chemical) caused the water to turn to steam (heat) which causes the piston to move the rod (mechanical) which moves the engine,\n\nIf you are looking for more in-depth,
121975
The machine consists of a screw inside a hollow pipe. The lower end of the device is put in the water, and the screw is then turned (usually by a windmill or by animal or human labor). As the bottom end of the tube turns, it scoops up an amount of water. This puddle of water will slide up in the spiral tube as the shaft is turned, until finally it falls out from the top of the spiral tube and feeds the irrigation system.
236761
A pool in roman style (a building style the Romans used). Look for pictures in the link below :)
286959
The Romans were master machine builders.\n\n"They lifted heavy stones using cranes that were worked by windlasses or treadmills or the backs of men, they dredged harbors, emptied lakes, and drained swamps"\n\nI expect that they used more than one technique.  Dragging scooping sleds over the bottom when it was smooth, dragging nets when less smooth.   I imagine some sort of conveyor belt or waterwheel would have been used as well.
123225
electricity or power obtained from moving water\nmainly from dams and tide power plants
26208
If you mean the water hydra, the answer is right now (http://en.wikipedia.org/wiki/Hydra_%28genus%29).  If you are referring to the Lernaean Hydra, it lived in the days of Hercules in ancient Greece (http://en.wikipedia.org/wiki/Lernaean_Hydra).
153188
When you run amps of current through conductive water, such as salt sea water, the water will interact with a magnet.  The caterpillar drive which pumps water through a tube with a an electric field through the water and a moving magentic field to create a jet of water is actually possible.  The water, however, is only acted on by a magnet as long as the electric current is flowing.  When the electric current stops, the water is disorganized and is unaffected by a magnetic field.  (Water molecules, however, are slightly polar, being slightly positive on the 2 hydrogen on the end, and slightly negative on the oxygen end. Note that this is a STATIC electric field, not a magnetic field!!!!)\n\nForce=ExB.  The electric field crossed with a magnetic field creates force.  Similarly an copper wire is not a magenet either.  Yet when an electric current is flowing through it, and it intersects a changing magnetic field, it will create a force on the wire.  Also, a changing electric field in a wire will induce a changing magnetic field in a magnetic material, like iron.  \n\nBoy I hope I haven't muddied the waters;  let me summarize: water CAN support an electric field through it, and hence be acted on by a magnetic field.  Changing the electric field in water can induce a changing magnetic field in a magnetic material.  Water, in itself, IS NOT, and CANNOT be magnetic, ever.  If you put iron particles in it, the iron particles will be magnetic.  Other metallic salts, sodium, calcium and the like will NOT make the water magnetic, only conductive.
643686
It would make water (H2O).
207200
I found a couple of sites listed below maybe one of these will help you out.\n\nhttp://www.uoguelph.ca/~antoon/circ/hv/classic/classic.html\n\nhttp://spazioinwind.libero.it/gabinetto_di_fisica/elmag/elmaginduction.htm#modrocchetto\n\nhttp://physics.kenyon.edu/EarlyApparatus/Electricity/Induction_Coil/Induction_Coil.html
156475
Moving water as in a river or water tuned to steam can turn a turbine and produce electricity.  http://en.wikipedia.org/wiki/Turbine
156772
So I don't think I saw an answer that I liked.  Motors move.  And the way motors move is with changing magnetic fields (electric current is changing with respect to time).\n\nWith AC motors, you have a changing current.  So you need to have a coil carrying the current, put it in a circle, and presto, you have a moving north pole moving around in a circle.  All you need is to have a magnet attached to a spindle, and the magnet will move around to follow the moving magnetic field rotating around in a circle.\n\nWith DC current it's different you do not have a changing current, but instead you have a steady current.  So how do you get the magnetic field to change?  You put a special device in that will flip the polarity of the voltage every half turn (or quarter turn depending on what you want).  So what happens is you get current flowing one way, and the magnet on the spindle moves to line up with the magnetic field, then on the spindel you have brushes which make contact with the DC voltage, as the spindle moves, the voltage is cut off, and then is reapplied, but now the voltage is reversed, and the north pole of the magnetic field is on the other side.  So the spindle moves, and the voltage is cut off, and then put back on and again reversed.  The DC motor as it moves reverses the voltage every half or quarter turn (depending on how you want to make it) so the motor creates the time varying magnetic field itself.
304288
They dwelled in houses and actually had electricity!\n\nYour question is still much too general.  \n\nWhere?  In what country (countries)?\n\nThere must be some specific subject  -- for instance, technologically, socially, politically -- on which your answer should be centered.\n\nThe more specific you can get, and the more information, you provide, the more appropriate answers you'll receive.\n\nGood luck.
1055447
i no somebody who uses the motor out of an old washer and has water constantly pouring through it to use on his pond. all he does is turn it on to start with to get it going and let gravity do the rest.
616186
The potential energy, stored by the water due to its height, converts to kinetic energy as it falls. This turns the turbines which in turn create electrical energy.\n\nThis conversion requires the use of a generator (the rotation of the coils of wire that cuts through the magnetic fields of some magnets results in electricity forming; refer to Fleming.)
460879
What your actually thinking of are baffles. These cause the water to travel in a zig zag way or even perpendicular to flow direction. This slows the water by taking its Kinetic Energy and so reduces wear on other structures or machinery
129239
I'm not sure what water tanks you are asking about.  I'm going to guess that you are referring to city water systems with towers holding large water tanks.\n\nThey are filled by pumps.  Wells are drilled and the water is pumped from them to these large tanks.  From the tanks gravity moves the water throughout the community to meet demand.