♥SOURCES OF ENRGY♥

sources of energy None-renewable Oil (petroleum) Natural gas Coal Uranium (nuclear) electricity Hydrogen Uses of energy science of energy saving energy Renewable Solar Wind Geothermal Biomass Hydro Ocean Energy Timelines What is energy ? What is Electricity ? Resistance and Static Electricity Circuits Stored Energy and Batteries

Energy Electricity nature Static Electricity and Resistance Circuits stored Energy and butteries Fossil Fuels-Coal, Oil and Natural gas Gas Distribution Geothermal Energy Hydro Power Nuclear Energy Ocean Energy Solar Energy Wind Energy Renewable Energy versus Fossil fuels Transpotation

Energy

Energy is the capacity to work. It may exist in many forms. Sun gives its energy in the form of heat and light. Cars are energized by gasoline, a type of chemical stored energy.

Food stored energy enable us to walk around and play. Energy can be found in mechanical, thermal, chemical, electrical, radial (light) and nuclear forms.

Mechanical Energy

Mechanical energy is divided to:

Stored energy (Potential energy)

Moving energy (kinetic energy)

A lifted object to a certain height stores energy in a potential form. When we leave its holding, it consumes its energy in a moving (kinetic) form. As it is obvious, higher lifts result of further falls.

Energy units

Thermal energy is measured in English unit BTU.

One BTU is the amount of energy to raise on Pound of water to one degree Fahrenheit it higher.

One average candy bar contains about one thousand BTU.

Energy can change its form but there is no creation or destroying form of energy. Energy must be remained in one of known forms.

For instance, chemical energy of a battery transformed to electrical energy which then can be changed to light energy in a flashlight.

Heat Energy

Heat energy is transferred in three forms:

1- Conduction

2- Convection

3- Radiation