ANY THING THAT HAPPENS - from a pin drop to an explosion-requires energy.Energy is the capacity for "doing work"(making something happen)various forms of e,energy exists ,including light, heat,sound,electrical,chemical,nuclear, kinetic,and potential energies.The law of conservation of energy states that the total amount of energy in the Universe is fixed energy
cannot be created or destroyed .It means that energy can only change from one form to another.(energy transfer).For example,potential energy is energy that is " stored "and can be used in future.
An object gain potential energy,when it is lifted ;as the object is released,potential energy changes into the energy of motion(kinetic energy)during transference,some of the energy converts into heat.A combined heat and power station can put some of the otherwise " waste" heat to useful effect in local housing.Most of the energy of the Earth's is provided by the Sun, In the form of electromagnetic radiation.Some of this energy transfers to plant and animal life,ultimately to fossil fuels,where it is stored in chemical form.Our bodies obtain energy from the food we eat.,while energy need for other tasks such as heating and transport, can be obtained by burning fossil fuels- or by harnessing natural forces like wind or moving water- to generate electricity.Another source is nuclear power, where energy is released by reactions in the nucleus of an atom .All energy is measured by the international unit, the joule(J).As a guide ,one Joule is about equal to the amount of energy needed to lift an apple one meter.
FORMS OF ENERGY
An object gain potential energy,when it is lifted ;as the object is released,potential energy changes into the energy of motion(kinetic energy)during transference,some of the energy converts into heat.A combined heat and power station can put some of the otherwise " waste" heat to useful effect in local housing.Most of the energy of the Earth's is provided by the Sun, In the form of electromagnetic radiation.Some of this energy transfers to plant and animal life,ultimately to fossil fuels,where it is stored in chemical form.Our bodies obtain energy from the food we eat.,while energy need for other tasks such as heating and transport, can be obtained by burning fossil fuels- or by harnessing natural forces like wind or moving water- to generate electricity.Another source is nuclear power, where energy is released by reactions in the nucleus of an atom .All energy is measured by the international unit, the joule(J).As a guide ,one Joule is about equal to the amount of energy needed to lift an apple one meter.
FORMS OF ENERGY
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