What is a reneable energy,and what does it do?
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"Renewable energy (sources) or RES capture their energy from existing flows of energy, from on-going natural processes, such as sunshine, wind, flowing water, biological processes, and geothermal heat flows. The most common definition is that renewable energy is from an energy resource that is replaced rapidly by a natural process such as power generated from the sun or from the wind.\n\nMost renewable forms of energy, other than geothermal and tidal power, ultimately come from the sun. Some forms are stored solar energy such as rainfall and wind power which are considered short-term solar-energy storage, whereas the energy in biomass is accumulated over a period of months, as in straw, or through many years as in wood. Capturing renewable energy by plants, animals and humans does not permanently deplete the resource. Fossil fuels, while theoretically renewable on a very long time-scale, are exploited at rates that may deplete these resources in the near future (see: Hubbert peak).\n\nRenewable energy resources may be used directly, or used to create other more convenient forms of energy. Examples of direct use are solar ovens, geothermal heating, and water- and windmills. Examples of indirect use which require energy harvesting are electricity generation through wind turbines or photovoltaic cells (PV cells), or production of fuels such as ethanol from biomass (see alcohol as a fuel). A parameter sometimes used in renewable energy is the tonne of oil equivalent (toe). This is equal to 10,000 Mcal or 41,868 MJ of energy.[1]\n\nIn a sense, renewable energy may be categorised as free energy, although most renewable energy sources would not normally be called "free energy". In engineering, free energy means an energy source available directly from the greater environment and which cannot be expected to be depletable by humans. Renewable energy development is concerned with the use of renewable energy sources by humans. For aspects of renewable energy use in modern societies see Renewable energy development. Modern interest in renewable energy development is linked to concerns about exhaustion of fossil fuels and environmental, social and political risks of extensive use of fossil fuels and nuclear energy. For a general discussion, see future energy development"
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Ok you need a bowl of water and the sun. The energy is trapped (at least temporarily) in the water, as heat.
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Potential Energy: Energy due to position.\nKinetic Energy: Energy due to motion.\n\n======================================================\nAs the ball moves up it gains potential energy and loses kinetic energy. It the maximum height, it has all potential energy and no kinetic energy. As it moves down, it loses potental energy and gains kinetic energy. When it hits the floor it's velocity (ideally) remains the same in magnitude but reverses in direction. It starts moving up again.....\n\nWork is the process of conversion of energy from one for to the other. So, work is being done as the ball bounces up and down.
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Every atomic fission releases excess energy in a variety of forms.  That excess energy is trapped by the reactor in the form of heat, which is used to generate steam to drive turbines which generate electricity.
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Potential & Kinetic are the 2 types of energy. Potential energy is energy that is stored in an object. If you stretch a rubber band, you will give it potential energy. As the rubber band is released, potential energy is changed to motion. Kinetic energy is energy of motion. A rubber band flying through the air has kinetic energy. When you are walking or running your body is exhibiting kinetic energy. Potential energy is converted into kinetic energy.
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Don't know, can't get it to download.\n\nHydrogen, wind, geothermal, differential barometric pressure, intermittent laser-induced fusion, biomass and seawater temperature differences are also possibilities for an energy revolution.
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At its simplest, a generator involves a spinning object inside a coil, and produces electricity.  It's tempting to think that if there were no friction, that the spinning object would turn forever always generating electricity, but that's not the case.\n\nWhen energy is extracted from the generator, it is because the generator is producing a current in its coil.  This current in the coil creates a magnetic field that actually slows down the spinning object.  Friction isn't the only force slowing down the system, it's not even an important force.  The important force is this electromagnetic braking force which arises as a direct and unavoidable consequence of the extraction of energy from the generator.
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Mechanical energy basically consists of potential and kinetic energy.  Potential energy is "captured" energy that is ready to be released.  Kinetic energy is energy a body possesses as a result of its motion.\n\nEveryday objects are made of atoms and molecules.  Atoms have electrical charges.  Electrical charges repel or attract each other.  It has been theorized that because of this, when objects interact with each other, they transfer mechanical energy and react to one another due to the electrical attraction or repulsion.  \n\nRead the wikipedia entry on mechanical energy.  It really is quite interesting.\n\nHave fun!
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Basically means that mass can be converted into energy.  You want proof?  Go search "nuclear weapon".
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The energy isn't destroyed, but it is reorganized into different forms.  Think of it this way: Imagine you have a bunch of fridge magnets with words on them, and you arrange them into a brilliant poem.  When you come back later, someone else has rearranged the magnets.  All of the magnets have been "conserved"-- they're still there, and they're just as magnetty as ever-- but the particular shape that they were in when they were your brilliant poem is unrecoverable.  Sorry. <3
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the first question refers to the first law of thermodynamics which means energy can be changed from one form to another, but it cannot be created or destroyed
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Potential Energy:  A car is at the top of a steep hill, in neutral, wheels straight,  with the parking brake on.  Release the brake.  The car will roll downhill, converting potential energy into kinetic energy.\n\nKinetic Energy:  The car continues rolling onto a flat stretch of road, which happens to be covered with grapes.  As it rolls over the grapes the car squishes them and slows down.  It's kinetic energy is being transformed into grape juice and heat.
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The source of energy is food. Food is digested, giving you energy.
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It is the transformation of potential energy, converted into kinetic energy, which in turn is converted to hydroelectric energy by the means which you described....KECK
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Thermal energy is the energy due to a temperature difference. Think of a glass of ice water in a warm room. Thermal energy goes from the room to the ice and melts it. Always from Hot to Cold.\n\nCar radiators use it to move heat away from the engine.\n\nAir conditioners.
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You can't make a perpetual-motion machine, if that's what you're getting at. Whatever loop you make, you'll always end up losing energy until it stops, unless you are putting energy in (solar) but then what's the point?
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Potential energy is the sum total of all the energy that CAN BE derived.  Think of it as stored energy waiting to be released.\n\nKinetic energy is the total energy being derived at some instant in time. Unlike potential energy, kinetic energy is determined by mass AND velocity.