Solar energy
Because they are the most readily available and easiest to use energy source. We need to use any and all available energy sources. Fossil fuels have many drawbacks, but their near global availability and ease of use guarantees that they will be used even with such drawbacks.
It means that the energy demand stays the same no matter what energy source it is coming from!
Any producer of heat can produce light by reaching enough energy
Depending on the source of the heat energy: -A darker piece of paper would absorb more energy from light sources, then a white piece of paper. This is due to the fact that the white piece of paper would reflect most of the light energy, whereas the dark paper would absorb that energy. This light energy can then be converted into heat energy, leading the dark paper to have more heat energy then the white paper -Heat from a source such as hot water being poured on the paper, would not lead to any color related heat difference
Other to coal I suppose you mean. Burning of any fuel like oil, wood, etc. Nuclear reactors. I suspect solar energy would make steam. It would be possible to use natural steam from deep in the ground.
The energy can come from just about any source of AVAILABLE energy.
The energy can come from just about any source of AVAILABLE energy.
any source of energy can be found from the sun
No, it is not source of any energy as it is a planet not a star.
Motion. The motion can be energized by virtually any source of energy.
No
You can usually use an electric motor any time you have an available source of electricity with which to run it.
The term clean source of energy refers to only primary energy sources as wind or solar energy. Electricity, by definition, is not a primary energy source. It is a secondary energy source that is could be produced by a clean energy source as wind or any renewable primary energy source or produced by fossil energy source as oil, natural gas, or coal.
The original source of the energy in any combustible plant material is from the sun.
Yes, solar energy is classed as a renewable source of energy.
i don't think that any energy besides your own engery from your finger because they didn't have any electricity. The momentum from your finger would be the energy source.
As with any biome, the ultimate source is the sun