Automotive

US forges new 'battery belt' in hopes of electric future

Growing up, Devante Cuthbertson assumed he might have to leave his North Carolina hometown to pursue a career, but a new multi-billion-dollar Toyota battery plant is offering him a reason to stay put.

Energy & Green Tech

Scientists determine disorder improves lithium-ion battery life

What determines the cycle life of batteries? And, more importantly, how can we extend it? An international research team led by TU Delft has discovered that local disorder in the oxide cathode material increases the number ...

Energy & Green Tech

Tackling climate change with social science

Tackling the climate challenge is requiring everyone to change the way we think about our homes, our lifestyles, and our investments. Australians are embracing the energy transition, with rooftop solar now contributing 11.2% ...

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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