Energy

Document Sample
Energy Powered By Docstoc
					                             Energy
Energy: It is the ability to do work.

Forms of energy :
The are several forms of energy:
1- Potential energy: Like the energy stored in a spring of a car toy.
2- Light energy:     Like the energy produced from an electric lamp.
3- Kinetic energy: Like the energy that moves the fan.
4- Heat energy:      Like the energy produced from the heater.
5- Sound energy: Like the energy produced from the Byano.
6- Electric energy: Like the energy produced from the dry cell.ُ



                              Sound
It is a form of energy forms
- reaches to ear causing the hearing.

Sound is produced due to vibration of objects.




                      Changes of energy:

1- Changing of potential energy into kinetic energy
Potential energy changes into kinetic energy in spring of
children toys.
2- Changes of kinetic energy:
1- Kinetic energy into sound energy

Ex: rubber band (you hear it).

2- Kinetic energy into heat energy.

Ex: Rubbing your hands

3- Kinetic energy changes into electric energy.

Ex: Dynamo




3- Changes of electric energy:

1- Changing of electric energy into light energy:
Ex: electric lamp
On passing of an electric current in a lamp, it lights.

2- Changing of electric energy into kinetic energy.
Ex: the motor of fan, electric
4- Changes of light energy:

1- Changing of light energy into heat energy.
Ex: magnifying lens.


2- Changing of light energy into electric energy:
Ex: solar cells

				
DOCUMENT INFO
Shared By:
Categories:
Tags: Energy
Stats:
views:18
posted:4/22/2012
language:English
pages:3
Description: Energy