Recent content by harroxelas

Well, for one, the field on a dc generator is usually on the stator, while in a ac generator, the field usually in the rotor. Also, the voltage generated "behind" the commutator is not sinusoidal, unlike on the voltage generated on a ac machine.

Well, I think this was poorly worded. Reactive power is not useless, it's just not able to do work (in the physical sense). Answering your question, this "useless oscillation of energy", A.K.A Reactive Power is stord on inductances and capacitances of circuits. You simply cannot have a REAL...

The Gods Themselves, by Isaac Asimov. Well, just get anything written by Asimov!

As an electric enginner you could work in several places (I think all of these qualify as being important to society). In any of these, you could work on projects, building, operation and maintenance. - Power generation; - Transmission lines; - Substations; - Industry plants such as: oil...

I'm an electric engineer myself and electricity is very important, but any kind of enginnering is important to making society better. If your concern is to make a meaningful carreer, one that betters the quality of life of people around you, you could choose any kind of engineering. You'd just...

LOL! Seriously now, I read an article on this a few days ago and it mentioned a paper by a guy named Nick Bostrom. Googled it. Check it out http://www.simulation-argument.com/"

I think of it tis way: If we think it's complete and it's in fact complete, no harm done. If we think it's complete and it's in fact incomplete, we loose! If we think it's incomplete and it's in fact complete, we'll just look for something that isn't there. No harm done, except that...

RexAllen, I see your point. I really do. But experience shows that, when it comes to people, things are not as easy as quantum mechanics. Your idea always goes back to the cause of the cause of the cause of the cause... it can't be proven to be right or wrong. Yet. What I mean is, not too...

Hello, I've seen some scientists say on videos and write in books that big bang was the expansion of space itself. Is there actual evidence to support this? That space expands on a large scale after the big bang is ok but to say that the big bang was the expansion of space itself seems a bit...

Here you are, at first, correct. Since our brains are very good in surviving the Earth enviroment, its "software" is dedicated to this environment and our beliefs are based on our experience. http://www.123opticalillusions.com/pages/opticalillusions40.php" . Your brain sometimes distorts what...

I didn't really get your point. Are you saying that according to "physicalism" there's no freewill? I mean, our actions would depend solely on the initial conditions plus probabilistic events (atomic interactions)? If that's what you're saying, I disagree. We don't know how our minds work...

You cloud use an inverter to transform dc voltage/current to ac.

Google for "Natural Science" by Rush. Awesome song.

These transformers are called isolation transformers because they simply separate circuits. One of the main use of these kind of transformers are for galvanic isolation. You simply segragate two circuits and couple them by the magnetic flux in the transformer's core. I don't know if they are...

The problem is that humans "are not fit" to think of such a long period of time. It' unnatural for us, since our lives only last decades. Think about the history of humanity. Look how much has changed in the last 4000 years or so. And that's nothing in 13.7 billions of years...