Automotive

China auto sales off 22.4% in first half of 2020

China's auto sales rose 1.8% in June over a year earlier but fell by double digits for the first half of 2020 after the country shut down to fight the coronavirus, an industry group reported Friday.

Energy & Green Tech

Building a better battery, faster

Battery experts at PNNL and elsewhere focus on developing rechargeable lithium-metal batteries because of their high energy density. Lithium-metal batteries have the potential to double the energy of lithium-ion batteries ...

Engineering

New method helps keep an eye on electromagnetic coils degradation

Electromagnetic coils are widely used components in many applications and systems, including solenoids, motors and transformers. However, coil insulation systems are failure-prone, especially under excessive thermal stresses, ...

Electricity

Electricity (from the New Latin ēlectricus, "amber-like"[a]) is a general term that encompasses a variety of phenomena resulting from the presence and flow of electric charge. These include many easily recognizable phenomena, such as lightning and static electricity, but in addition, less familiar concepts, such as the electromagnetic field and electromagnetic induction.

In general usage, the word 'electricity' is adequate to refer to a number of physical effects. However, in scientific usage, the term is vague, and these related, but distinct, concepts are better identified by more precise terms:

Electrical phenomena have been studied since antiquity, though advances in the science were not made until the seventeenth and eighteenth centuries. Practical applications for electricity however remained few, and it would not be until the late nineteenth century that engineers were able to put it to industrial and residential use. The rapid expansion in electrical technology at this time transformed industry and society. Electricity's extraordinary versatility as a source of energy means it can be put to an almost limitless set of applications which include transport, heating, lighting, communications, and computation. The backbone of modern industrial society is, and for the foreseeable future can be expected to remain, the use of electrical power.

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