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conservation of energy

conservation of energy

3 4.1
A basic physics rule that total energy in a closed system cannot be created or destroyed
  • noun
  • /ˌkɒnsərˈveɪʃən əv ˈɛnərdʒi/
  • Specialized
translation icon : conservación de la energía
  • Thus, the universe coming into existence does not violate the conservation of energy.
  • the law of conservation of energy
  • conservation of energy and momentum

Today's lesson is conservation of energy and today's theme is nature.

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Examples

  • In physics, the conservation of energy principle explains why energy cannot be created or destroyed.

  • And so conservation of energy is very important to us as a species.

  • Well, in so far as the first law is a statement about the conservation of energy, I think it's inviolate.

  • Our absolute priority will be the conservation of energy as we use all our non-renewable sources.

    Blog text (17)
  • The law of conservation of energy implies that noxious waste cannot be simply disposed of by dilution and/or dispersion.

    Academic text (1992)
  • As in all inelastic scattering processes, conservation of energy and momentum dictate the kinematics of light scattering.

    Academic text (1994)
  • Understanding the conservation of energy helps scientists explain how energy changes form in a closed system.

  • The conservation of energy is fundamental in predicting how systems behave when energy is transformed.

Synonyms

first law of thermodynamics
vsconservation of energy
  • Specialized
1 4.5

Total energy in a place where nothing enters or leaves stays the same while it changes form

is the general physics statement not limited to thermodynamics
law of conservation of energy
vsconservation of energy
  • Specialized
1 4.9

Total energy in a system that does not gain or lose energy stays the same

is the same idea but named more broadly in physics

Surface Forms

Morphology

conservation + of + energy

The phrase is directly compositional: 'conservation' (the principle of keeping something constant) combined with 'energy' yields the idea that energy is kept constant or not lost. This is a standard scientific collocation with the same logic in many languages, so a B1 learner who knows the constituent meanings should be able to infer the overall meaning.

Etymology

The phrase conservation of energy creates a simple image: think of energy as money kept in a closed box, which you can move into different pockets like heat, movement or light, but you cannot add more or make it disappear. So, the idea explains why the total energy in a closed system 'stays the same' and only changes form.