how many energy sources are there?
608910
There are no energy sources.  Energy is either kinetic or potential, chemical or mechanical.  It is changed from one form to another.  If a rock is sitting atop a cliff, there is potential energy PE=mgh, PE potential energy, m mass of the rock in kilograms, g gravity 9.8 meters/second squared, h height of the rock on the cliff over the base in meters.  Once the rock begins to fall, it is converted into Kinetic energy.  KE = 1/2 mv^2, v velocity squared in meters^2/second^2.  By doing the equation, the relation checks out.  There is no more energy on one side than the other side.  But if he were to lift up the rock then throw it off, it wouldn't matter because v would also change accordingly. The energy is given to the rock by a person who uses his own energy to push it over the edge.  His own energy is from the food he eats.  The food's energy comes from sunlight by way of photosynthesis.  The sun's energy comes by way of fusion reaction.  If there is a single true energy source, it is the single creation of everything, ie. God.\n\nMy $0.02 worth.
173862
Yes I believe there is.  If I am not mistaken it is one that has convertible energy source.  I believe it can use either natural gas or propane gas.\n\n\n\nhttp://answers.yahoo.com/question/index;_ylt=AiczHi..Uh6._y0UWddPS93sy6IX?qid=1006022811250
764663
What there's more than one?.
586408
More than one, you just have to find them.\n\nGood luck
784931
all i know is that theres more then 100.\nHelium.
1187482
Kilowatt\nCost depends on method of generation and location
385490
Yes wind is definitely a renewable energy source. Take a look at the link provided for more info on RES and other examples.
281104
It appears to be in relation to energy production.  I have referenced a hyperlink to a PDF file that refers to this term with in its context...the file does have some English translation.
961027
Dead.\n\nThe only source for energy for life on earth is the sun, and the only way that energy gets here is light.
1122346
Cf: atomic bombs and nuclear power plants. They use the conversion of a tiny amount of mass to lots and lots of energy.
990354
This website might help: http://www.worldenergy.org/wec-geis/edc/open.plx?file=default/default.htm \nIt has LOTS of info on which countries use which resources to get energy. Hope it helps!
118060
It is used to generate electricity.
144961
There is only once source of energy: the Big Bang. Everything else is just energy accounting.
651684
thousands!  so many, scientists haven't even found and classified them all!\n\nthere are also industrial plants and power plants, but you don't want these in your backyard :)
226685
Well, other forms of energy create so much more pollution that nuclear energy is the safest, most viable source of energy. I'll admit it's far from perfect, but considering the low output of energy collection devices such as solar and wind, nuclear energy has a huge output for a very low energy input.\n\nAnd nuclear power plants are among the most efficient power sources we have. Coal and nuclear plants are about 30-40% efficient. In contrast, the human body is only 20% efficient. Until we can develop a system of fusion that creates an acceptable amount of energy to warrant the energy required to start the reaction, fission is our best bet.
128885
A renewable energy source is one that can be "renewed" , or can be produced again. Examples are wind, hydroelectric, and geothermal. Non-renewable energy comes from sources that cannot be created again, such as petrolium and coal.\nOur world is now looking for new renewable energy sources to take the place of nonrenewables when they run out.
1126571
There are actually 111 confirmed elements.  There are 5 more elements (though they are not recognized by the ACA), that have been produced by scientists artificially.