i find science forums are quite hopeless... there are too many people who don't know the facts yet argue their cases with all the time they have spent on this planet... the people who know their stuff are sick of arguing with them... newbie to the forum think that those who are wrong are right... the correct one tries to stop them but the wrong one would engage in personal attacks to draw the new ppl to their side. the correct one is so pissed that he leaves, leading the newbies to think that he is wrong...

So, everyone. Forums are the WORST source of information. if you want to progress in life, get books that your teachers recommend. they are recommended for a very good reason. and they are certainly worth the cost. C'mon, you get what you pay for. Study from a forum and you'll be wasting the time of your life.