what is tidal energy?
594209
It is where you use the energy of tidal flows to turn a turbine or such to produce electricity.\nIf you think about a dam using the energy of the water to turn turbines, much the same method is used to harness the wave energy.  However, it is not as efficient, and it is much harder to harness.  \nThere are other methods currently on trial, the web link below will take you to a site with the three main areas.  \nThe second one takes you to an educational site.\nGood luck
1114274
Tough question, however Solar and Wind are viable sources of energy where available.  BioMass and utilization of human waste are also viable sources of future energy.  There's some speculation about technology to harness the energy contained in Ocean Water (currents) though I am not an engineer and don't understand it at all.  Finally, eliminating wastefulness and extending the usefulness of exsiting fuel types will assure at least in the short term enough for all (this is particularly aimed at the USA as the largest consumer of existing fuels per capata in the World, the question is why)
948165
There have been proposals and designs for wave-generated electricity.  It is not the same as dams and is more difficult because of the variability of the wave motion.  I think the reason it hasn't  been done is that the mechanisms are expensive for the amount of power that can be obtained.
92796
nuclear energy is a hidden ,concentrated,compressed energy.You just leave it free and use it.it is everywhere and in everything.just get the technology to get it out .it is the ultimate source of energy,clean ,easy to use and will be in absolute abundance.
176722
Tides vary in strength depending on whether the sun and moon are working together or against each other.  Also the shape of the coast that the tide washes against can magnify it (like a converging bay) or dimminish it (like a diverging promontory jutting into the sea).  Therefore, the location is key.  For substantial power generation, a massive structure may be required which is a huge investment.  The project may be opposed for esthetic reasons (some like big tides?) and economic reasons (access for ships and pleasure boats may be affected?).  Such structures can change the natural movement of sand and beaches, especially during and follopowing huge storms.  But one big problem remains, that you can not harness the tides without influencing and changing them.  The wrong structure could dimminish the very tide that you wish to harness.  Therefore, the tides can be harnessed (some have been) but not without many problems to overcome.  Computer models can help only with the technical problems to avoid abandoned investments.
67988
The first answer is correct.  Energy.  Energy is defined as force applied through a distance.  This specific type of energy is known as kinetic energy (energy of motion).  Energy is measured in joules, or J.  E = F x D, so if you applied 50 Newtons and the object moved 1 metre, you would have expended 50 joules.
276622
Major problem is there aren't a lot of locations with a high enough tidal push to make it feasible--Only around 20 sites in the world have been identified as possible tidal power stations.\n\nAdvantages\n    * Once you've built it, tidal power is free.\n    * It produces no greenhouse gases or other waste.\n    * It needs no fuel.\n    * It produces electricity reliably.\n    * Not expensive to maintain.\n    * Tides are totally predictable.\n    * Offshore turbines and vertical-axis turbines are not ruinously expensive to build and do not have a large environmental impact.\n\nDisadvantages\n    * A barrage across an estuary is very expensive to build, and affects a very wide area - the environment is changed for many miles upstream and downstream. Many birds rely on the tide uncovering the mud flats so that they can feed. There are few suitable sites for tidal barrages.\n    * Only provides power for around 10 hours each day, when the tide is actually moving in or out.\n\nBottom link is similar idea:
653017
I would start with the sun. It is the source of all the energy we get. It made the plant grow that the dinosaurs ate that we get fossil fuel from. It causes the weather that we can get wind energy or tidal energy, or we can get solar power directly. Yup.. start with the sun and trace every kind of energy you can think of back to it.
211921
Potential energy is the energy by virtue of its position.\nAny object which is far away from the center ofpossessingf nothing prevents it will move towards the center of earth. A spring wound fully  or partially. If left alone and it will rewind to its normal position.A  vessel containing gas under high pressure.If there is a vent the pressure will drop to normal.A string under tension. All thesrelievedamples of potential energy. These energies will be releived from the object when  there is proper way. \n\nKinetic energy is the energy by virtue of its motion. Any object moving in other words having velocity is possesing kinetic energy.If the velocity is reduced by some external agency the latter gets energy and viceversa.
170108
"Tides are the periodic rise and fall of the ocean waters. They are caused by the gravitational pulls of the Moon and (to a lesser extent) Sun, as well as the rotation of the Earth."\n\nCheckout these site for more info:
76194
Thermal energy is a measure of molecular motion, not collision, and the more motion there is in the water, the higher the thermal energy (kinetic), and the higher the temperature.
1095007
no, there are many freshwater rivers that are tidal.  in fact, i dont think i know of any rivers that arent freshwater (except polluted one)\n\nmany rivers that empty into the ocean would be considered tidal.\n\nwhere it empties, as the tide rises, water will rise too, and in many instances can change the current of the river and make it flow in reverse.  \n\nif you close up that opening a little, say with a bridge, the water will flow extra fast and is a very interesting ride on a canoe or kayak.  its a popular attraction at many places in maine i know, where you can ride around in the rapids that form on one side of the bridge and then slowly transitioning into rapids on the other side.
1131325
Maybe this can help...all you have to do is a search in Yahoo or Google...\n\nhttp://www.think-energy.com/ThinkEnergy/11-14/activities/EnergyTrans.aspx\n\nTry searching for "energy" or "kinetic energy"
1050409
Some folks are doing interesting things with tidal energy.\n\nIt really all goes back to the sun in the end though - even oil comes from biomas, which captured and stored energy from sunlight.
1165853
It's somehow conneted with the gravitational pull on the earth, causing the tides and apparemtly causes some tidal work in the minds of some people too!Alot of people I know have gone a bit loop recently...
1176123
Responses without sources are not answers, just opinions.\n\nA tidal bore (or just bore, or eagre) is a tidal phenomenon in which the leading edge of the incoming tide forms a wave (or waves) of water that travel up a river or narrow bay against the direction of the current. As such, it is a true tidal wave (not to be confused with a tsunami).
277620
You've asked several questions about tidal energy.  Rather than try to answer them all, I'll provide you with a website that is a start. You can google tidal power to find gallons more information on the subject!