Energy & Green Tech

Interest rates are a decisive factor for competitive renewables

Renewable energy has become competitive—and one often-overlooked reason is the reduced cost of financing. Researchers from ETH Zurich and the Potsdam Institute for Climate Impact Research (PIK) have modeled different scenarios ...

Energy & Green Tech

A globalized solar-powered future is economically unrealistic

Over the past two centuries, millions of dedicated people—revolutionaries, activists, politicians, and theorists—have been unable to curb the disastrous and increasingly globalized trajectory of economic polarization ...

Hardware

Huawei debuts latest advanced chipset for smartphone

Chinese tech giant Huawei unveiled its latest advanced chipset Friday ahead of the upcoming launch of its latest flagship smartphone, even as uncertainty hangs over whether the device can use Google's Android.

Energy & Green Tech

Europe's future is renewable

Europe has enough solar and wind resources to meet its electricity demand entirely from renewable sources. A new study by researchers at the Institute for Transformative Sustainability Research (IASS) in Potsdam shows that ...

Engineering

Developing embedded systems faster

Whether for the car or the drone: Developing image processing software for embedded systems takes a lot of time and is therefore very expensive. Now the Tulipp platform makes it possible to develop energy-efficient embedded ...

Engineering

Novel device to improve powder flow

Anyone who has tried to pour powdered sugar into a jar knows that sometimes beating the sides of the container or package is the only way to make it flow. That same process is used in making medicines and products such as ...

Energy & Green Tech

Solar array feeds railway route in the UK

How well is the UK doing to seal a future of solar powered trains? Will connecting solar power directly to rail networks help meet a good enough share of electricity needs? Eyes are on a pilot scheme going on now and it ...

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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