Glossary:Conservation of energy

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 * Title            = Conservation of energy
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 * ImageSize        = 300px
 * Definition       = The Conservation of energy is the principle discovered by Sir Isaac Newton, it stated that, in physics, the law of conservation of energy states that the total energy of an isolated system remains constant it is said to be conserved over time. Energy can neither be created nor destroyed; rather, it transforms from one form to another. In the Marvel Universe, a common explanation for size increase/decreases/etc is that characters' added/excess mass is "shunted off into a pocket dimension."

Cases

 * Wolfsbane, wore a skintight X-Uniform that shifts into a collar when she turned into her werewolf and wolf forms. Somehow the collar does not distort the fur around her neck, but is so comfortable that she has never, ever mentioned its existence.
 * Warlock and his species seemed to have no limit on how large he can transform and change his mass to fit the size instantly.
 * Mystique; Shape-shifting powers mean if she wants to grow in size significantly, she has to gain mass; if she wants to shrink significantly, she has to lose mass; and always she has to keep in mind the position of her organs. It's even suggested that she can remain in her Raven Darkholme form indefinitely because there's no change in mass, while trying to keep the same mass in a larger form is a strain that keeps her from using such forms for long. Given her age and experience, however, that sort of 'strain' is a relative term. Mystique has complete control of her powers allowing her to perform feats such flattening out to avoid taking damage by an explosion, assuming a monstrous form by sprouting a second face and pair of arms in order to quadruple wield, faking a glass vial being broken in her hand, faking the effects of a lethal virus, smuggling items in a "flesh pocket" in her stomach, and pointing out that since she mimics all her clothing too, she's technically naked all the time.
 * Big Bertha of the Great Lakes Avengers is not explained where the extra mass comes from when going from supermodel skinny to her bulky form. But when she does not need her extra mass she disperses it by vomiting it back out.
 * Skrulls are explicitly described as being unable to alter their mass, and therefore having size restrictions on what they can imitate.
 * Doctor Connors regrows his arm whenever he becomes the "Lizard". He originally transformed slowly using the existing matter from his body and large amounts of food. However Komodo his assistant who had her legs amputated, created an improved version of the Connors Formula lets her shift between forms at will. However their is no explanation where her legs go when she turns back to normal.

Alternate Realities

 * In the Ultimate Universe; Tony Starks's posses a mild Healing Factor which allowed him to regrow his legs, but he has to eat large amount of food to get the necessary materials.

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