The water molecule is polar, which is like a north/south pole magnet. A magnet sitting on a desk however is just a static magnet that isn't moving. Could you isolate one single water molecule and turn it into a motor? A polar magnet that spins round and round, is much different than a polar magnet that just sits on a desk static without moving. The difference is that a spinning magnet has energy, whereas a non-spinning magnet has no energy. If you isolated one single water molecule, would it still spin? In nano technology, if that water molecule spins, could you not turn it into an AC motor, since the water molecule spins an alternating positive and negative? When exposing one polar molecule to an switching electric field, wouldn't the spinning momentum of the molecule generate alternating current? Wouldn't slowing down the spin of the water molecule, violate some law? If a magnet is already spinning at tremendous speed, wouldn't exposing that magnet to opposite fields (brakes) slow the spin down, since you would be taking away momentum (like regenerative braking, slowing something down by capturing electricity from existing energy in the turning speed)? Would that also not be true for a water molecule? However with the magnet on a desk spinning analogy, I am thinking only in two dimensions. Water actually spins in many directions, unfortunately, in 3D, not just round and round in 2D like a magnet on a desk. It might be hard to capture the movement of the water molecule if it is spinning erratically rather than in 2 dimensions like a spinning magnet on a table. That's where the spinning magnet analogy breaks down; a magnet that spins on a table is only doing it clockwise or counterclockwise, whereas a water molecule spins forward, backward, left, right. Would two H20 molecules function as 2 individual bicycle wheels on a nano-bike? Again we are back to the problem of the spin.. it's not just 2D clockwise/counterclockwise, it's spinning in many directions AFAIK more like a gyroscope. Could one make a gyroscopic nano AC motor instead of a 2D motor. Would not slowing down the spin violate some law since you can't take energy away from existing substances at room temperature. The way I see it, is that the molecule is already spinning - one just has to find a way to slow the molecule down, similar to Regenerative braking, which brakes existing speed and slows a vehicle down that is already moving with spinning wheels.. This would be tapping into the wheelwork of nature, quackery proposed by Tesla. Forgive it for sounding like quackery if it does.