Law of conservation of energy - Revision history

Jmdonev: 1 revision imported

2022-08-21T17:46:19Z

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En>Jmdonev at 17:38, 21 August 2022

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	[[Category:Done ~~2020~~-02-29]]		[[Category:Done 2022-12-31]]
	[[Category:Translated to French]]		[[Category:Translated to French]]
	[[fr:Conservation d'énergie]]		[[fr:Conservation d'énergie]]
			[[Category:Translated to Spanish]]
			[[es:Ley de conservación de la energía]]
	<onlyinclude>The '''law of conservation of energy''' states that [[energy]] can neither be created nor destroyed - only converted from one form of energy to another.</onlyinclude> This means that a [[system]] always has the same amount of [[energy]], unless it's added from the outside. This is particularly confusing in the case of [[non-conservative force]]s, where energy is converted from [[mechanical energy]] into [[thermal energy]], but the overall energy does remain the same. The only way to use energy is to [[energy transformations\|transform energy]] from one form to another.		<onlyinclude>The '''law of conservation of energy''' states that [[energy]] can neither be created nor destroyed - only converted from one form of energy to another.</onlyinclude> This means that a [[system]] always has the same amount of [[energy]], unless it's added from the outside. This is particularly confusing in the case of [[non-conservative force]]s, where energy is converted from [[mechanical energy]] into [[thermal energy]], but the overall energy does remain the same. The only way to use energy is to [[energy transformations\|transform energy]] from one form to another.

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	*[[Heat]]		*[[Heat]]
	*[[Carnot efficiency]]		*[[Carnot efficiency]]
	*Or explore a [[http://energyeducation.ca/encyclopedia/Special:Random\| random page]]		*Or explore a [http://energyeducation.ca/encyclopedia/Special:Random\| random page]

	To learn more about the physics of the law of conservation of energy, please see [http://hyperphysics.phy-astr.gsu.edu/hbase/conser.html#coneng hyperphysics] or for how this relates to chemistry please see UC Davis's [http://chemwiki.ucdavis.edu/Physical_Chemistry/Thermodynamics/Laws_of_Thermodynamics/First_Law_of_Thermodynamics/Conservation_of_Energy chem wiki].		To learn more about the physics of the law of conservation of energy, please see [http://hyperphysics.phy-astr.gsu.edu/hbase/conser.html#coneng hyperphysics] or for how this relates to chemistry please see UC Davis's [http://chemwiki.ucdavis.edu/Physical_Chemistry/Thermodynamics/Laws_of_Thermodynamics/First_Law_of_Thermodynamics/Conservation_of_Energy chem wiki].
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Jmdonev: 1 revision imported

2021-09-27T00:03:10Z

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energy>Ethan.boechler at 20:22, 10 September 2021

2021-09-10T20:22:35Z

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	[[Category:Done 2020-02-29]]		[[Category:Done 2020-02-29]]
			[[Category:Translated to French]]
			[[fr:Conservation d'énergie]]
	<onlyinclude>The '''law of conservation of energy''' states that [[energy]] can neither be created nor destroyed - only converted from one form of energy to another.</onlyinclude> This means that a [[system]] always has the same amount of [[energy]], unless it's added from the outside. This is particularly confusing in the case of [[non-conservative force]]s, where energy is converted from [[mechanical energy]] into [[thermal energy]], but the overall energy does remain the same. The only way to use energy is to [[energy transformations\|transform energy]] from one form to another.		<onlyinclude>The '''law of conservation of energy''' states that [[energy]] can neither be created nor destroyed - only converted from one form of energy to another.</onlyinclude> This means that a [[system]] always has the same amount of [[energy]], unless it's added from the outside. This is particularly confusing in the case of [[non-conservative force]]s, where energy is converted from [[mechanical energy]] into [[thermal energy]], but the overall energy does remain the same. The only way to use energy is to [[energy transformations\|transform energy]] from one form to another.

Jmdonev: 1 revision imported

2020-04-28T15:32:38Z

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energy>Jmdonev at 22:04, 10 April 2020

2020-04-10T22:04:31Z

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	[[Category:Done ~~2018~~-06-01]]		[[Category:Done 2020-02-29]]
	<onlyinclude>The '''law of conservation of energy''' states that [[energy]] can neither be created nor destroyed - only converted from one form of energy to another.</onlyinclude> This means that a [[system]] always has the same amount of [[energy]], unless it's added from the outside. This is particularly confusing in the case of [[non-conservative force]]s, where energy is converted from [[mechanical energy]] into [[thermal energy]], but the overall energy does remain the same. The only way to use energy is to [[energy transformations\|transform energy]] from one form to another.		<onlyinclude>The '''law of conservation of energy''' states that [[energy]] can neither be created nor destroyed - only converted from one form of energy to another.</onlyinclude> This means that a [[system]] always has the same amount of [[energy]], unless it's added from the outside. This is particularly confusing in the case of [[non-conservative force]]s, where energy is converted from [[mechanical energy]] into [[thermal energy]], but the overall energy does remain the same. The only way to use energy is to [[energy transformations\|transform energy]] from one form to another.

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	This is also a statement of the [[first law of thermodynamics]].		This is also a statement of the [[first law of thermodynamics]].

	While these equations are extremely powerful, they can make it hard to see the power of the statement. The takeaway message is that energy cannot be created from nothing. [[High energy society\|Society]] has to get energy from somewhere, although there are many sneaky places to get it from (some sources are [[fuel]]s and some sources are [[flow]]s).		While these equations are extremely powerful, they can make it hard to see the power of the statement. The takeaway message is that energy cannot be created from nothing. [[High energy society\|Society]] has to get energy from somewhere, although there are many sneaky places to get it from (some sources are [[primary fuel]]s and some sources are [[primary energy flow]]s).

	Early in the 20<sup>th</sup> century, [http://www.nobelprize.org/nobel_prizes/physics/laureates/1921/ Einstein] figured out that even [[mass]] is a form of energy (this is called [[mass-energy equivalence]]). The amount of mass directly relates to the amount of energy, as determined by the most famous formula in physics:		Early in the 20<sup>th</sup> century, [http://www.nobelprize.org/nobel_prizes/physics/laureates/1921/ Einstein] figured out that even [[mass]] is a form of energy (this is called [[mass-energy equivalence]]). The amount of mass directly relates to the amount of energy, as determined by the most famous formula in physics:

Jmdonev: 1 revision imported: Doing upload, largely of old redirects.

2018-06-04T16:52:20Z

1 revision imported: Doing upload, largely of old redirects.

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Jmdonev at 22:51, 31 May 2018

2018-05-31T22:51:04Z

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	<onlyinclude>The '''law of conservation of energy''' states that [[energy]] can neither be created nor destroyed - only converted from one form of energy to another.</onlyinclude> This means that a [[system]] always has the same amount of [[energy]], unless it's added from the outside. This is particularly confusing in the case of [[non-conservative force]]s, where energy is converted from [[mechanical energy]] into [[thermal energy]], but the overall energy does remain the same. The only way to use energy is to [[energy transformations\|transform energy]] from one form to another.		<onlyinclude>The '''law of conservation of energy''' states that [[energy]] can neither be created nor destroyed - only converted from one form of energy to another.</onlyinclude> This means that a [[system]] always has the same amount of [[energy]], unless it's added from the outside. This is particularly confusing in the case of [[non-conservative force]]s, where energy is converted from [[mechanical energy]] into [[thermal energy]], but the overall energy does remain the same. The only way to use energy is to [[energy transformations\|transform energy]] from one form to another.

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	:*<math>c</math> is the [[speed of light]], roughly <math>3\times10^8 m/s</math>.		:*<math>c</math> is the [[speed of light]], roughly <math>3\times10^8 m/s</math>.

	To learn more about the law of conservation of energy, please see [http://hyperphysics.phy-astr.gsu.edu/hbase/conser.html#coneng hyperphysics] or UC Davis's [http://chemwiki.ucdavis.edu/Physical_Chemistry/Thermodynamics/Laws_of_Thermodynamics/First_Law_of_Thermodynamics/Conservation_of_Energy chem wiki].		==For Further Reading==
			*[[First law of thermodynamics]]
			*[[Internal energy]]
			*[[Work]]
			*[[Heat]]
			*[[Carnot efficiency]]
			*Or explore a [[http://energyeducation.ca/encyclopedia/Special:Random\| random page]]

			To learn more about the physics of the law of conservation of energy, please see [http://hyperphysics.phy-astr.gsu.edu/hbase/conser.html#coneng hyperphysics] or for how this relates to chemistry please see UC Davis's [http://chemwiki.ucdavis.edu/Physical_Chemistry/Thermodynamics/Laws_of_Thermodynamics/First_Law_of_Thermodynamics/Conservation_of_Energy chem wiki].
	[[Category:Uploaded]]		[[Category:Uploaded]]

Jmdonev: 1 revision imported

2017-08-29T01:47:20Z

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Jmdonev at 20:31, 15 August 2017

2017-08-15T20:31:24Z

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	[[Category:Done ~~2015~~-09-06]]		[[Category:Done 2017-07-01]]
	<onlyinclude>The '''law of conservation of energy''' states that [[energy]] can neither be created nor destroyed - only converted from one form of energy to another.</onlyinclude> This means that a [[system]] always has the same amount of [[energy]], unless it's added from the outside. This is particularly confusing in the case of [[non-conservative force]]s, where energy is converted from [[mechanical energy]] into [[thermal energy]], but the overall energy does remain the same. The only way to use energy is to [[energy transformations\|transform energy]] from one form to another.		<onlyinclude>The '''law of conservation of energy''' states that [[energy]] can neither be created nor destroyed - only converted from one form of energy to another.</onlyinclude> This means that a [[system]] always has the same amount of [[energy]], unless it's added from the outside. This is particularly confusing in the case of [[non-conservative force]]s, where energy is converted from [[mechanical energy]] into [[thermal energy]], but the overall energy does remain the same. The only way to use energy is to [[energy transformations\|transform energy]] from one form to another.

	The amount of energy in any system, then, is determined by the following equation:		The amount of energy in any system, then, is determined by the following equation:

	<m>U_{T} = U_{i} + W + Q</m>		<math>U_{T} = U_{i} + W + Q</math>
	:*<m>U_T</m> is the total [[internal energy]] of a [[system]].		:*<math>U_T</math> is the total [[internal energy]] of a [[system]].
	:*<m>U_i</m> is the initial internal energy of a system.		:*<math>U_i</math> is the initial internal energy of a system.
	:*<m>W</m> is the [[work]] done by or on the system.		:*<math>W</math> is the [[work]] done by or on the system.
	:*<m>Q</m> is the [[heat]] added to, or removed from, the system.		:*<math>Q</math> is the [[heat]] added to, or removed from, the system.

	It is also possible to determine the change in internal energy of the system using the equation:		It is also possible to determine the change in internal energy of the system using the equation:
	<m>\Delta U = W + Q</m>		<math>\Delta U = W + Q</math>

	This is also a statement of the [[first law of thermodynamics]].		This is also a statement of the [[first law of thermodynamics]].
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	Early in the 20<sup>th</sup> century, [http://www.nobelprize.org/nobel_prizes/physics/laureates/1921/ Einstein] figured out that even [[mass]] is a form of energy (this is called [[mass-energy equivalence]]). The amount of mass directly relates to the amount of energy, as determined by the most famous formula in physics:		Early in the 20<sup>th</sup> century, [http://www.nobelprize.org/nobel_prizes/physics/laureates/1921/ Einstein] figured out that even [[mass]] is a form of energy (this is called [[mass-energy equivalence]]). The amount of mass directly relates to the amount of energy, as determined by the most famous formula in physics:

	<m>E = mc^{2}</m>		<math>E = mc^{2}</math>
	:*<m>E</m> is the amount of energy in an object or system.		:*<math>E</math> is the amount of energy in an object or system.
	:*<m>m</m> is the mass of the object or system.		:*<math>m</math> is the mass of the object or system.
	:*<m>c</m> is the [[speed of light]], roughly <m>3\times10^8 m/s</m>.		:*<math>c</math> is the [[speed of light]], roughly <math>3\times10^8 m/s</math>.

	To learn more about the law of conservation of energy, please see [http://hyperphysics.phy-astr.gsu.edu/hbase/conser.html#coneng hyperphysics] or UC Davis's [http://chemwiki.ucdavis.edu/Physical_Chemistry/Thermodynamics/Laws_of_Thermodynamics/First_Law_of_Thermodynamics/Conservation_of_Energy chem wiki].		To learn more about the law of conservation of energy, please see [http://hyperphysics.phy-astr.gsu.edu/hbase/conser.html#coneng hyperphysics] or UC Davis's [http://chemwiki.ucdavis.edu/Physical_Chemistry/Thermodynamics/Laws_of_Thermodynamics/First_Law_of_Thermodynamics/Conservation_of_Energy chem wiki].
	[[Category:Uploaded]]		[[Category:Uploaded]]