News tagged with energy

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

Team deciphers sugar's siren song

Sugar's sweetness and calorie content combine to give it lethal power to destroy diets, many scientists have assumed. However, new study by Yale University researchers says the brain responds to taste and calorie counts in ...

Jan 25, 2016
popularity53 comments 0

Brain receptor regulates fat burning in cells

Scientists at the Gladstone Institutes have discovered an unusual regulator of body weight and the metabolic syndrome: a molecular mechanism more commonly associated with brain cells. Lowering levels of P75 neurotrophin receptor ...

Jan 12, 2016
popularity190 comments 0

Study shows how alcohol effects food consumption

A researcher from the University's Institute of Psychology, Health and Society has published a paper in Health Psychology about the adverse effect alcohol has on a person's inhibitory control when it comes to food.

Jan 06, 2016
popularity6 comments 0

Stored fat is a feat of evolution

In spite of the bad press, stored fat is actually a really wonderful thing. Without the capacity to store energy in the form of fat, we would have been unlikely to survive through millions of years of evolution and we would ...

Jan 05, 2016
popularity24 comments 0

Opinion: Why mix alcohol with energy drinks?

It is that time of year when schools and universities are breaking up from exams and when young people start to party and unwind from the pressures of the year. Curtin University's Julia Stafford considers the harmful effects ...

Dec 03, 2015
popularity6 comments 0

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

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