conservation of energy
noun phrase
: a principle in physics: the total energy of an isolated system remains constant irrespective of whatever internal changes may take place with energy disappearing in one form reappearing in another
Examples of conservation of energy in a Sentence
Recent Examples on the Web
And the principles are conservation of water mass, air mass, conservation of energy, conservation of momentum in three directions, and the state equation for air, the ideal gas law.
—
Quanta Magazine, 10 July 2025
There’s no conservation of energy on that end of the floor.
—Dan Woike, Los Angeles Times, 26 Feb. 2025
But in this scenario, the only physical principles involved are conservation laws, such as the conservation of energy or the conservation of momentum and angular momentum.
—Manon Bischoff, Scientific American, 9 Sep. 2024
The second law of thermodynamics, the first law of thermodynamics, the conservation of energy, the principles of statistical mechanics, the properties of radiation — all of that is 100% dependent on a set of principles that include the zeroth principle of physics, that information is conserved.
—Quanta Magazine, 11 Apr. 2024
Wagner places a lot in this category: linear algebra, the law of conservation of energy, the cure for scurvy, the paintings of van Gogh and Vermeer, the poetry of Dickinson and Keats, the compositions of Johann Sebastian Bach.
—Diana Gitig, Ars Technica, 24 June 2023
Price at time of publication: $12 Hot Wheels Criss Cross Crash Track Set
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Hot Wheels are such a fun way to teach scientific principles about speed and the conservation of energy and mass—without being in a classroom.
—Dorian Smith-Garcia, Parents, 8 Nov. 2023
Hot Wheels are such a fun way to teach scientific principles about speed and the conservation of energy and mass—without being in a classroom.
—Dorian Smith-Garcia, Parents, 8 Nov. 2023
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Quanta Magazine, 10 July 2025
There’s no conservation of energy on that end of the floor.
—Dan Woike, Los Angeles Times, 26 Feb. 2025
But in this scenario, the only physical principles involved are conservation laws, such as the conservation of energy or the conservation of momentum and angular momentum.
—Manon Bischoff, Scientific American, 9 Sep. 2024
The second law of thermodynamics, the first law of thermodynamics, the conservation of energy, the principles of statistical mechanics, the properties of radiation — all of that is 100% dependent on a set of principles that include the zeroth principle of physics, that information is conserved.
—Quanta Magazine, 11 Apr. 2024
Wagner places a lot in this category: linear algebra, the law of conservation of energy, the cure for scurvy, the paintings of van Gogh and Vermeer, the poetry of Dickinson and Keats, the compositions of Johann Sebastian Bach.
—Diana Gitig, Ars Technica, 24 June 2023
Price at time of publication: $12 Hot Wheels Criss Cross Crash Track Set
View On Amazon View On Walmart View On Kohls.com
Hot Wheels are such a fun way to teach scientific principles about speed and the conservation of energy and mass—without being in a classroom.
—Dorian Smith-Garcia, Parents, 8 Nov. 2023
Hot Wheels are such a fun way to teach scientific principles about speed and the conservation of energy and mass—without being in a classroom.
—Dorian Smith-Garcia, Parents, 8 Nov. 2023
Cite this Entry
“Conservation of energy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/conservation%20of%20energy. Accessed 23 Jul. 2025.
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