News tagged with energy

Related topics: electricity · energy consumption · renewable energy · energy efficiency · fossil fuels

How to increase the fat burned during exercise

During exercise, oxidation of fat and carbohydrates depends on the intensity and duration of the activity. A new study analyses the effect of consuming an alkaloid, p-synephrine, on the burning of lipids and refutes the value ...

Jul 19, 2016
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US teens less sweet on soft drinks

(HealthDay)—American teens are turning their backs on soft drinks, says a new government survey that shows soda consumption among youth declined by almost a third in just two years.

Jul 07, 2016
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Why architects should let the microbes in

Architectural design is often concerned with energy efficiency or aesthetics, not microbial exposure. But, in a Science & Society article published July 7 in Trends in Microbiology, Yale environmental engineers make a case ...

Jul 07, 2016
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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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