Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Can magnetic energy be used to create a magnetic motor which can power vehicles and machines?

share|cite|improve this question

closed as unclear what you're asking by Dilaton, Chris White, Waffle's Crazy Peanut, John Rennie, Emilio Pisanty Aug 23 '13 at 13:32

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question.If this question can be reworded to fit the rules in the help center, please edit the question.

Hi Andy. Please don't ask a number of questions in a single post, because the title contradicts with the body (which can confuse people). And, can you please be specific on what you're trying to ask? For example, "How can magnetic energy be used to create a magnetic motor?" – Waffle's Crazy Peanut Aug 22 '13 at 20:04

Contrary to what we might want to believe, any kind of perpetual motion device would violate the known laws of physics. No system can create energy out of nothing, and even if an engine were 100% efficient and didn't lose anything to friction, gravity, etc, it might run forever as long as there was no draw of energy out (ie. to do useful work). As nice as it would be to have such a machine, Ray Bradbury said it best, "There ain't no such thing as a free lunch."

As to your question about water powering a car, that too would violate the known laws of physics. Water is an extremely stable compound, and is not combustible at all. In order to derive energy out of the components of water, the water molecules would have to be split into their constituent parts, oxygen and hydrogen. The hydrogen would be combustible, recombining with oxygen in the atmosphere to generate energy and water as exhaust. However, the amount of energy required to split off the hydrogen from the water is significantly greater than the amount of energy you could derive from burning the hydrogen. Once again, in order to do useful work, we have to have an external energy source.

share|cite|improve this answer
All prove magnetic and water power/energy works in cars. – Andy Harglesis Aug 22 '13 at 20:33
The first one is likely powered by an $2H_2$+$O_2\to 2H_2O$ reaction. The second one is a sales pitch for a nonworking product (you'll find many debunkings/criticisms from a google search). The third one appears to have a standard electric motor (electric motors use magnetism). – NeuroFuzzy Aug 22 '13 at 22:15

Not the answer you're looking for? Browse other questions tagged or ask your own question.