Business

Lyft's Zimmer talks future of workplace, electric vehicles

Lyft scored a major victory when California voters passed Proposition 22, allowing app-based companies to treat drivers as contractors instead of employees and saving the company from what many anticipated would be crippling ...

Energy & Green Tech

US nuclear lab partnering with utility to produce hydrogen

The U.S. Department of Energy has awarded just under $14 million for an attempt to build a hydrogen-energy production facility at a nuclear power plant in Minnesota with the help of a nuclear research lab in Idaho.

Energy & Green Tech

Philippines bans new coal-fired projects

By declaring a moratorium on the construction of greenfield coal power plants in a statement issued on 27 October, the Philippines has announced intent to follow other Asia Pacific countries into a green future.

Energy & Green Tech

Japan's Toshiba retreats from coal-fired power stations

Japanese engineering giant Toshiba will not build any more coal-fired power plants and will shift to renewable energy in a bid to reduce greenhouse emissions, the company's president said Wednesday.

Energy & Green Tech

Solar perovskite production on a roll

High-performance perovskite solar cells are made using a manufacturing-friendly liquid-based process suitable for roll to roll production.

Energy & Green Tech

Electrifying growth of renewables despite pandemic

The coronavirus pandemic may have dealt a blow to energy demand but growth of renewables in the electric power sector has continued at a record pace, an IEA report said Tuesday.

Energy & Green Tech

How to accelerate solar adoption for the underserved

As rooftop solar prices have fallen, many households at all income levels can now save money by going solar. Nonetheless, low- and moderate-income households remain less likely to adopt solar than high-income households. ...

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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