If you look around you , You will notice that every thing needs the energy to do their functions . You need food to obtain the energy that helps you to work , move , play , .....etc .
Your car needs the fuel to obtain the energy that causes the motion of its engines .
Do you know what is the meaning of the energy ?
You should know that the Energy is the ability to do work .
The forms of the energy
There is a potential energy stored in the spring of the toy car .
The kinds of the energy . You should know that there is a kinetic energy produced by the electric fan and the washing machine .
There are several forms of the energy . There is a light energy produced by the electric lamp or the Sun .
There is a heat energy produced by the heater .
The energies are used by the different devices . There is an electric energy produced by the dry cell ( battery ) and the solar cells .
There is a chemical energy stored in the battery .
There is a sound energy produced by the piano and the radio .
The piano produces a sound energy .
Examples of some changes of the energy
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| Some changes of energy . |
You noticed that the potential energy changes into the kinetic energy as in the spring of the children toys .
The kinetic energy can change into the sound energy as in the violin , the guitar , and when you knock on the door .
The kinetic energy change into the heat energy , When you rub your hands , when you hammer on a piece of iron , and when you remove a nail from a piece of wood .
The kinetic energy changes into the electric energy as in the dynamo .
The electric energy changes into the light energy as in the electric lamp , where it light , when the electric current pass through it .
The electric energy changes into the kinetic energy as in the electric fan , the electric motor and the washing machine .
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| In the fan , The electric energy changes into the kinetic energy . |
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