QUOTE(d4rkholeang3l @ Aug 31 2009, 10:24 PM)
By applying Pascal Principle??using enclosed fluid system?
where
F1 / A1 = F2/ A2
1 = input
2= output
The output Force depends on the :
Ratio of A2:A1
Input force
correct me if i m wrong...
You are right. But you need to displace the same volume of fluid in order to achieve that. Since volume = area x height,
A1 x H1 = A2 X H2; (replace this into your first eq. F1/A1 = F2/A2)
F1 x H1 = F2 x H2
Remember work = force x distance. You still spend the same amount of energy/work to achieve the same thing, except you did it the other way round. Same goes to car jack.
Added on August 31, 2009, 11:51 pmQUOTE(bgeh @ Aug 29 2009, 03:38 PM)
2 answers: Firstly, you cannot make more energy out of some fixed amount of energy.
Secondly, you can actually do such a thing, which sounds extremely contradictory. See the exploration of oil for example. To extract the oil, we use say 500MJ, but in return we get 2.5GJ, or something from the oil itself. That however, does not contradict conservation of energy, and I think that's what the initial question was trying to ask. What happened was that the initial energy was used as an investment to extract a larger source of energy. But the source of energy wasn't created in any way in the first place out of nothing (please don't take this literally again - I'm talking processes that created these sources, say geological processes that led to deposits of oil).
I think TS refering to amplifying the energy using existing source. It's like, using a motor to turn a dynamo (generator), and as the generator turns, it generate electricity. We then used the electricity to power the motor, so that it could continuously turn the dynamo. Then, by using more powerful magnet, we could generate larger amount of electricity, hence allow us to generate more energy. (which is impossible, because the resistance from the magnet will prevent the core from turning. And for that, we need more electric energy to power the motor, which in return cancel the positive energy).
Before anyone is confused, oil (or more specifically, hydrocarbon) is highly unstable, which allow it to release high amount of energy when it is raised above the stable region (aka easily combust at high temperature). It is basically a form of chemical energy (latent energy).
Although it is true that we use a fraction of resource(energy) to extract a larger amount of energy, we can't claimed that we "
created" it. We simply
harvest" it.
This post has been edited by Aurora: Aug 31 2009, 11:51 PM 
Aug 29 2009, 03:21 PM
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