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kenyonlau99

Where Does Solar Energy Come From - PV Gap - 0 views

www.pvgap.org/...es-solar-energy-come-from.html

solar form

shared by kenyonlau99 on 08 Mar 13 - No Cached
  • Solar energy is energy from the sun, it is a renewable source of energy and does not cause pollution.
  • kenyonlau99 on 08 Mar 13
     
    where does solar/photovoltaic energy come from? answer above!
pondalb98

Where does wind power come from - 0 views

wiki.answers.com/...here_does_wind_power_come_from

form

shared by pondalb98 on 11 Mar 13 - No Cached
  • no it doesn't if it does what does power windmills,wind,where do that come from huh? so that's wrong, it comes from the sun
  • pondalb98 on 11 Mar 13
     
    "no it doesn't if it does what does power windmills,wind,where do that come from huh? so that's wrong, it comes from the sun"
bishophan00

Wind Power Information, Wind Power Facts - National Geographic - 1 views

environment.nationalgeographic.com/...wind-power-profile

wind form

shared by bishophan00 on 11 Mar 13 - No Cached
  • Wind is a clean source of renewable energy that produces no air or water pollution.
  • Wind is the movement of air from an area of high pressure to an area of low pressure. In fact, wind exists because the sun unevenly heats the surface of the Earth. As hot air rises, cooler air moves in to fill the void. As long as the sun shines, the wind will blow. And as long as the wind blows, people will harness it to power their lives.
  • The wind spins the blades, which turn a shaft connected to a generator that produces electricity. Other turbines work the same way, but the turbine is on a vertical axis and the blades look like a giant egg beater.
  • ...5 more annotations...
  • At the end of last year, global capacity was more than 70,000 megawatts.
  • And since the wind is free, operational costs are nearly zero once a turbine is erected.
  • Globally, generation more than quadrupled between 2000 and 2006.
  • n the energy-hungry United States, a single megawatt is enough electricity to power about 250 homes.
  • ndustry experts predict that if this pace of growth continues, by 2050 the answer to one third of the world's electricity needs will be found blowing in the wind.
  • barnardnat99 on 11 Mar 13
     
    where wind energy come from
  • conwayjam99 on 13 Mar 13
     
    ". At the end of last year, global capacity was more than 70,000 megawatts. In the energy-hungry United States, a single megawatt is enough electricity to power about 250 homes. "
adamsaub98

How does tidal energy generate electricity - 0 views

wiki.answers.com/...al_energy_generate_electricity

convert

shared by adamsaub98 on 11 Mar 13 - No Cached
  • Tidal BarragesA tidal barrage is basically a huge dam that is built across a river or estuary. Tunnels are built throughout the dam, and when the tide rises and falls it turns a turbine that generates power. Tidal FencesTidal fences are giant turnstiles that have vertical axis turbines mounted on a fence. The water passes through the fence and powers the turbines. Tidal TurbinesTidal turbines are the latest water power technology used in tidal areas. They look like wind turbines that are lined together underwater. They are used to capture strong tidal flows, so they have to be built extra strong.
conwayjam99

What are the advantages and disadvantages of wind power - 0 views

wiki.answers.com/...nd_disadvantages_of_wind_power

wind

shared by conwayjam99 on 13 Mar 13 - No Cached
  • conwayjam99 on 13 Mar 13
     
    "Wind power will become cheaper than fossil fuel in the next few years (when the price of carbon is added to coal and oil), and in many places already is."
rascoekat00

Where is tidal power being used to generate electricity - 0 views

wiki.answers.com/...g_used_to_generate_electricity

tide power convert electricity

shared by rascoekat00 on 19 Mar 13 - No Cached
  • Barrage systems. This system, built like a dam across a river, holds back the water till the tide has gone out, then uses the potential energy of the water to turn turbines in the barrage. This is an expensive system with many disadvantages.
  • Tidal Stream systems. This consists of using turbines, rather like wind turbines, to use the kinetic power of the moving water to generate electricity. This is easier and cheaper to install.
  • There are three Barrage systems operating throughout the world. One large 240 MW plant on the Rance River in France, and two small plants, one in the Bay of Fundy in Canada, and another in Kislaya Guba in Russia.
slentzkel99

Describe Two Different Energy Alternatives To... | Chegg.com - 1 views

www.chegg.com/...natives-fossil-fuels--q3091004

alternatives fossil

shared by slentzkel99 on 26 Oct 12 - No Cached
  • Difference Between Alternative Energies (Ae) And Fossil Fuels essential difference between alternative energies (AE) and fossil fuels? Alternative energies will not have a lot of pollution, but fossil fuels will cause some..
dynesbri97

How does wind form - 0 views

wiki.answers.com/...How_does_wind_form

shared by dynesbri97 on 13 Mar 12 - No Cached
  • All winds are caused by differences in air pressure, which are usually caused by the sun. When high air pressure flow into low air pressure, it creates wind.Our planet turns around the Sun on an axis with a 23 degree tilt towards the North Star. The difference of heating on the surface of the Earth (between the equator and the pole) causes a mass of hot air to go up and to displace colder air toward the bottom - this all causes movement in the mass of air that is contain in our atmosphere.
big_jerome

How do wind turbines transform the energy found in the wind - 1 views

wiki.answers.com/...m_the_energy_found_in_the_wind

wind energy

shared by big_jerome on 19 Mar 12 - No Cached
  • A wind turbine is a rotating machine which converts the kinetic energy in wind into mechanical energy. If the mechanical energy is used directly by machinery, such as a pump or grinding stones, the machine is usually called a windmill.
  • wind t
levendosjoh99

Why does the moon's gravity cause tides on earth but the sun's gravity doesn't? | Science Questions with Surprising Answers - 0 views

sciencequestionswithchris.wordpress.com/...th-but-the-suns-gravity-doesnt

tide form

shared by levendosjoh99 on 20 Sep 13 - No Cached
  • The ocean tides on earth are caused by both the moon’s gravity and the sun’s gravity.
  • the ocean tides we experience on earth are caused by the sum of the moon’s gravitational gradient and the sun’s gravitational gradient.
charlesjos00

Where Does Solar Energy Come from - Ask.com - 0 views

www.ask.com/...re-does-solar-energy-come-from

form

shared by charlesjos00 on 20 Sep 13 - No Cached
  • Solar Energy comes from Sun. Sun is a hot ball of Hydrogen & Helium. Due to fission reaction of Hydrogen molecules, energy is emitted which is known as Solar Energy.
  • Solar thermal energy transfers heat directly from the sun to heat air or water for residential or commercial use.
  • Solar energy comes from the lowest point of the sun. The sun bears a constant stream of thermonuclear explosions as hydrogen atoms are merged into helium atoms. The Sun is like a humongous power station that constantly does a reaction that lets out light.
  • ...1 more annotation...
  • Solar energy comes from the lowest point of the sun.
crandallmad00

What are the advantages and disadvantages of renewable tidal power - 0 views

wiki.answers.com/...tages_of_renewable_tidal_power

tide wave

shared by crandallmad00 on 27 Sep 13 - No Cached
  • trictly, tidal power comes from the mov
  • crandallmad00 on 27 Sep 13
     
    Strictly, tidal power comes from the movement of the tides, and wave power comes from the movement of the waves. There are two kinds of tidal power stations: Tidal stream systems, which use turbines turned by the moving water to generate electricity. Very like wind power. Barrage systems. These are like dams built across rivers. After the tide comes in, the gates are closed. When the tide is low enough on the downstream side, the water flows through turbines rather like a hydro-electric dam. Wave power consists of harnessing the movement of the waves. There are various pilot schemes of this at the moment.
mattisonmar00

How Can Wind Be Turned into Electricity - Ask.com - 1 views

www.ask.com/...ind-be-turned-into-electricity

wind convert

shared by mattisonmar00 on 23 Sep 13 - No Cached
  • The wind turbine is a rotating machine that turns the kinetic energy of wind into mechanical energy. The energy can then be used by machines or converted into electricity and stored.
dpurdy

What Is Geothermal? | GoGoGeo - 0 views

www.gogogeochallenge.com/what-is-geothermal

geothermal form

shared by dpurdy on 23 Sep 13 - No Cached
  • The short answer to this question is that Geothermal Energy is a type of renewable energy that is generated and stored within the Earth.
charlesjos00

Why is solar energy good for the planet - 0 views

wiki.answers.com/...lar_energy_good_for_the_planet

solar

shared by charlesjos00 on 24 Sep 13 - No Cached
  • Solar energy is good for the planet because it is a clean way to produce things we need every day. It doesnt cause pollution because it is nature's own energy and is a 100% renewable resource.
charlesjos00

Why is solar energy good - 0 views

wiki.answers.com/...Why_is_solar_energy_good

solar

shared by charlesjos00 on 24 Sep 13 - No Cached
  • solar energy is environmentally safe and does not contribute to pollution, acid rain, global warming, or smog. it is very dependable and lasts as long as the sun does-a couple billion years.
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