what is the best explaination for sources of energy?

Answer 1

Explaination??? Cant get your question

Answer 2

There are various sources of energy : Solar, electricity, magnetism, heat, ..... etc.

The sources of energy are christened with respect to the the quality of "useful work" that particular source can produce per unit of energy expenditure. It is important that some energy is wasted in deriving useful work {heat added to environment when potatoes are boiled (useful work)}.

This way "most ordered or graded" (solar energy - as stored in the phosphorous on match stick tip) and "least ordered or most degraded" (mechanical work - running boy wasting chemical energy (more ordered than work). You can obtain x units of mechanical work from y units of solar energy (y=x+t >heat) but we cant get back to y units of solar energy from x units of work (already been degraded the most). It is due to the disorder or rise in entropy of the system upon conversion from more ordered to less ordered.

Answer 3

Can you ask that question again?

Sources of energy don't require an explanation.

Sources of energy include the sun, fossil fuels like oil and gas, nuclear materials like uranium, the wind, dammed-up water, tides, biomass for burning, and combustible substances (methane, peat, wood, etc).

Okay, what do you want explained about them?

Do you want a philosophical answer that "explains" them like God made them for our use to benefit mankind, but the Devil helps us to put them to use to pollute the earth and destroy humanity with smog and nuclear fallout?

;o)

Answer 4

Energy can neither be created nor destroyed, but energy can flow from a higher energy state to a lower energy state (like heat or light). Energy can also be converted from say potential energy to kinetic energy and vice versa.

Mass can be converted to energy (E=m.c^2) and yes, energy can be converted to mass.

Hydel (Hydro-electricity) is conversion of potential energy to kinetic energy and to electrical energy

Wind power is conversion of thermal energy (surfaces of earth heated to different temperatures and thus producing winds), and the wind drives a turbine (one form of kinetic to another form of kinetic), and the turbine generates electricity.

Nuclear power is by conversion of mass into energy - in this case heat, and heat to electricity

When coal or oil is burnt, a chemical reaction takes place and again the heat of reaction is a conversion of potential energy to heat.

Solar is conversion of light to electricity using PhotVoltaic Cells.

Answer 5

Energy is generally obtained from systems in a low entropic state.

Answer 6

matter which can give us energy.

Answer 7

humm.. ??