History Main / NoConservationOfEnergy

28th Jun '16 4:18:28 AM Morgenthaler
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* The titular character of ''TheChroniclesOfProfessorJackBaling'' wonders about this one, both as it applies to the perpetual motion machine created by his student and his own disintegrator ray. Using the latter in quick succession does end up blowing a fuse, but the amount of energy involved in powering the thing in the first place is staggering. He shouldn’t be able to get that much juice at once in the first place.

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* The titular character of ''TheChroniclesOfProfessorJackBaling'' ''Literature/TheChroniclesOfProfessorJackBaling'' wonders about this one, both as it applies to the perpetual motion machine created by his student and his own disintegrator ray. Using the latter in quick succession does end up blowing a fuse, but the amount of energy involved in powering the thing in the first place is staggering. He shouldn’t be able to get that much juice at once in the first place.
25th Jun '16 1:23:20 PM TheGreatSkrond
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** The worst offender is actually probably the in-system warp drives. In a game full of arithmetic, it's only a matter of time before the player takes the mass of their ship (over two), multiplies by the square of warp speed (a couple thousand times light speed, but that's a standard scifi suspension of disbelief deal) and compare it to the amount of energy the ship draws from the capacitor to go into warp (a few Gj). At which point he'll facepalm so hard his forehead will be purple for days.
25th Jun '16 1:01:54 PM Ferot_Dreadnaught
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** Even in this case, there's a [[CriticalResearchFailure Critical Research Failure]]. When preparing to enter the Hadarac, Eragon, as an experiment, attempts to convert a small quantity of sand to water. In this universe, a spell cannot be aborted once started unless specifically phrased to allow that. This troper did the calculations based upon the packing fraction curve and determined that the energy required to turn 30 grams of sand (determined by the mention of a "thimblefull" of water as the final product) into water would require more than 300 times the daily intake of energy in a 3000-calorie diet (2000 per day is typical - it's increased here because of Eragon's strenuous lifestyle at the time). Even Saphira couldn't have provided that much energy. He should have died then and there.

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** Even in this case, there's a [[CriticalResearchFailure Critical Research Failure]].CriticalResearchFailure. When preparing to enter the Hadarac, Eragon, as an experiment, attempts to convert a small quantity of sand to water. In this universe, a spell cannot be aborted once started unless specifically phrased to allow that. This troper did the The calculations based upon the packing fraction curve and determined that the energy required to turn 30 grams of sand (determined by the mention of a "thimblefull" of water as the final product) into water would require more than 300 times the daily intake of energy in a 3000-calorie diet (2000 per day is typical - it's increased here because of Eragon's strenuous lifestyle at the time). Even Saphira couldn't have provided that much energy. He should have died then and there.
25th Jun '16 12:59:17 PM TheGreatSkrond
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Added DiffLines:

** Even in this case, there's a [[CriticalResearchFailure Critical Research Failure]]. When preparing to enter the Hadarac, Eragon, as an experiment, attempts to convert a small quantity of sand to water. In this universe, a spell cannot be aborted once started unless specifically phrased to allow that. This troper did the calculations based upon the packing fraction curve and determined that the energy required to turn 30 grams of sand (determined by the mention of a "thimblefull" of water as the final product) into water would require more than 300 times the daily intake of energy in a 3000-calorie diet (2000 per day is typical - it's increased here because of Eragon's strenuous lifestyle at the time). Even Saphira couldn't have provided that much energy. He should have died then and there.
25th Jun '16 12:19:43 PM TheGreatSkrond
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*** Since the wizarding community doesn't believe anybody can reach the moon (not only did they not do it first, they think space travel is impossible), and they've got spells to handle the environmental problems, there probably ''is'' a limiting factor. Or some ambient planetary field all magic is powered off of.

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*** Since the wizarding community doesn't believe anybody can reach the moon (not only did they not do it first, they think space travel is impossible), and they've got spells to handle the environmental problems, there probably ''is'' a limiting factor. Or some ambient planetary field all magic is powered off of.by.
*** There is some limiting factor: it's mentioned in passing in Quidditch Through the Ages that some models of brooms became difficult to control or otherwise erratic at high altitudes.
*** Actually, I don't think they do have spells to handle the environmental problems. The Bubble-Head Charm may act more like a filter/compressor/gill than an oxygen tank, extracting oxygen from the environment rather than generating it. If there's no oxygen, it won't work. And there's no evidence Shield Charms prevent gas transfer, meaning you couldn't go into vacuum.
10th May '16 11:48:54 PM PaulA
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* Averted in Creator/AnneMcCaffrey's [[Literature/TowerAndTheHive Talent series]], which explains that the power necessary for the telekinetics to hurl spaceships around like toys comes from ''massive'' generators. Psychic activity (with or without a generator gestalt) also burns ''a lot'' of calories, meaning that, while a telekinetic with no generator handy can get the job done quicker, he's still doing the same amount of work as someone doing it by hand. Many of the telekinetics are shown eating some pretty high-calorie meals and snacks throughout the day to keep their strength up, and get extremely fatigued after teleporting very large objects (even with the generators helping).
** Also, it's stated that energy must be '''absorbed''' when negative work is done (for instance, teleporting an object from orbit down to ground level), although simply being the conduit for such large amounts of energy can still place enormous stress on physical systems.

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* Averted in Creator/AnneMcCaffrey's [[Literature/TowerAndTheHive Talent series]], 'verse (''Literature/ToRidePegasus'' trilogy and ''Literature/TowerAndTheHive'' series), which explains that the power necessary for the telekinetics to hurl spaceships around like toys comes from ''massive'' generators. Psychic activity (with or without a generator gestalt) also burns ''a lot'' of calories, meaning that, while a telekinetic with no generator handy can get the job done quicker, he's still doing the same amount of work as someone doing it by hand. Many of the telekinetics are shown eating some pretty high-calorie meals and snacks throughout the day to keep their strength up, and get extremely fatigued after teleporting very large objects (even with the generators helping).
**
helping). Also, it's stated that energy must be '''absorbed''' when negative work is done (for instance, teleporting an object from orbit down to ground level), although simply being the conduit for such large amounts of energy can still place enormous stress on physical systems.
6th May '16 12:55:22 AM PaulA
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** Also averted in ''Literature/TheShipWho Won''. A brainship finds a world where magic actually works, complete with all the standard no conservation of energy tropes. Then they discover that [[spoiler:there's actually a huge generator complex powering all this, which the magicians have completely wrecked by using it for stupid things like fireballs and levitation]].

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** Also averted * Averted in ''Literature/TheShipWho Won''.''Literature/TheShipWhoWon''. A brainship finds a world where magic actually works, complete with all the standard no conservation of energy tropes. Then they discover that [[spoiler:there's actually a huge generator complex powering all this, which the magicians have completely wrecked by using it for stupid things like fireballs and levitation]].
4th Apr '16 8:55:12 AM supergod
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It is generally more acceptable in {{Fantasy}} settings, especially with ArtisticLicensePhysics, although more thorough authors will try to explain where the power for magic comes from. Some author try to maintain conservation by invoking a law of EquivalentExchange, with varying degrees of success depending on how well it's thought out.

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It is generally more acceptable common in {{Fantasy}} settings, especially with ArtisticLicensePhysics, although more thorough some authors will try to explain where the power for magic comes from. from anyway. Some author authors try to maintain conservation by invoking a law of EquivalentExchange, with varying degrees of success depending on how well it's thought out.
EquivalentExchange.
22nd Mar '16 6:56:38 PM FordPrefect
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** The energy of empty space is technically non-zero. Though in physics this "zero-point energy" is by definition not extractable its existence has resulted in great loads of pseudoscience from people that need to brush up on their math. Has to some extent displaced quantum entanglement as the handwave justification for new-age mysticism in recent years.

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** The energy of empty space is technically non-zero. Though in physics this "zero-point energy" is by definition not extractable extractable, its existence has resulted in great loads of pseudoscience from people that need to brush up on their math. Has to some extent displaced quantum entanglement as the handwave justification for new-age mysticism in recent years.
16th Mar '16 12:06:20 AM DarkHunter
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* ''Anime/DragonBallZ'': These people can destroy PLANETS. They can casually shoot beams from their hands that level mountains. Aside from a somewhat [[BigEater large appetite]] (and only in the case of the Saiyans), this is never explained.

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* ''Anime/DragonBallZ'': ''Anime/DragonBallZ'':
**
These people can destroy PLANETS. They can casually shoot beams from their hands that level mountains. Aside from a somewhat [[BigEater large appetite]] (and only in the case of the Saiyans), this is never explained.explained.
** Beerus in ''Dragonball Super'' goes one further: he has the ability to "nullify" energy, completely erasing it from existence. Good thing too: [[spoiler:that energy burst he and Goku created during their battle was potentially powerful enough to annihilate multiple stars whether or not Goku had managed to block it (which he didn't).]] Of course, Beerus ''is'' the God of Destruction, and he has that title for a reason.



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