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Morocco to harness the wind in energy hunt

Morocco is ploughing ahead with a programme to boost wind energy production, particularly in the southern Tarfaya region, where Africa's largest wind farm is set to open in 2014.

Technology - Energy & Green Tech

11 hours ago

5 / 5 (3)

Bernanke forecasts gains from computer technology

(AP)—Federal Reserve Chairman Ben Bernanke says pessimists who are forecasting that the economy will not reap sizable benefits from the computer revolution are likely to be proven wrong.

Technology - Internet

11 hours ago

not rated yet

Energy

In physics, energy (from the Greek ἐνέργεια - energeia, "activity, operation", from ἐνεργός - energos, "active, working") is a scalar physical quantity that describes the amount of work that can be performed by a force, an attribute of objects and systems that is subject to a conservation law. Different forms of energy include kinetic, potential, thermal, gravitational, sound, light, elastic, and electromagnetic energy. The forms of energy are often named after a related force.

Any form of energy can be transformed into another form, but the total energy always remains the same. This principle, the conservation of energy, was first postulated in the early 19th century, and applies to any isolated system. According to Noether's theorem, the conservation of energy is a consequence of the fact that the laws of physics do not change over time.

Although the total energy of a system does not change with time, its value may depend on the frame of reference. For example, a seated passenger in a moving airplane has zero kinetic energy relative to the airplane, but non-zero kinetic energy relative to the Earth.

This text uses material from Wikipedia, licensed under CC BY-SA

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