Browse Reference Articles
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Transformer
A transformer is an electrical device that transfers energy from one circuit to another by magnetic coupling with no moving parts. A transformer comprises two or more coupled windings, or a single ... > more -
Newton's cradle
Newton's cradle or Newton's balls, named after Sir Isaac Newton is a device that demonstrates conservation of momentum and energy. It is constructed from a series of pendulums (usually five in ... > more -
Crane (machine)
A crane is a tower or derrick equipped with cables and pulleys that can be used both to lift and lower materials and to shift them horizontally. Cranes are commonly employed in the construction ... > more -
Alternative fuel vehicle
Alternative Fuel Vehicle refers to a vehicle that runs on a fuel other than traditional gasoline or diesel; any method of powering an engine that does not involve petroleum. Due to a combination of ... > more -
Wind Energy
Renewable Energy
Energy and the Environment
Environmental Science
Energy Technology
Energy Policy
Wind power
Wind power is the conversion of wind energy into more useful forms, such as electricity, using wind turbines. At the end of 2006, worldwide capacity of wind-powered generators was 73.9 gigawatts; ... > more -
Mobile phone
A mobile phone or cell phone is an electronic telecommunications device with the same basic capability as a conventional fixed-line telephone, but which is also entirely portable and is not required ... > more
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