Well it's not in Capra's book...I look through the whole chapter relating to "parallels". Maybe someone else can help you. I have no clue what an underlined u means. Why do you ask? What purpose do you have to determine it's meaning?
Might help if you mentioned where and under what circumstance you saw the term under. I do not recall seeing it before though. BTW I think most people understand what an underlined u is, you don't need to type it in such a large font! It appears somewhat aggressive or demanding. Let us know...
Why is the unit vector \hat a_{\rho} not constant? Doesn't it always point in a radial direction? In this case I have specified it to point towards the origin using the minus sign.
I thought the purpose of polar coordinates was to simplyfy problems with circular symmetry. But here I have...
How can I not do this??
I am trying to determine the electric field due to an arc of charge which spans the angles 0 to \pi with a total charge q. Does anyone know why I cannot integrate this directly? The only way I get the right answer is to convert a_{\rho} (unit vector in radial...
Wow everyone seems to have spent a lot of time memorizing things. Simply reading the entire post has made me really dizzy. Personally I find that if I write things down I remember them better. And then write them over and over and over. After a while they just stick. But what's the point of...
I have found this book to be an invaluable reference...I haven't used it too much but I have found a reasonable explanation for just about everything I ever wanted to know about mathematics in it. I still prefer full length texts to this kind of reference style book, however I just like to know...
First of all there would be no more movies or sitcoms where a child is forced to eat their peas before desert. Peas and lesser vegetables (who are still part of the same supreme family) would be seen as a delicacy and worshiped via a wookie prayer prior to consumption. Next any important...
Wouldn't there always be tension in the string? I mean, it cannot just float in midair, can it? If we neglect gravity completely, as zero friction would seem to suggest, then there would be no tension in the string, but otherwise there would have to be some tension in the string, otherwise it...
Telmerk, I realize it is closed-minded of me to laugh at someone who learns just for the sake of knowing...I learn about "silly things" (depending on your perspecitve) all the time. I just find it amusing that someone received a graduate degree for researching beer...something which I feel...
"Physics is to Math what Sex is to Masturbation" -Richard Feynman
And didn't he know a lot of mathematics? I am a physicist by choice, but I still love mathematics. I think that both mathematicians and physicists are extra careful in their own domain, but tend to get a little lax when...
It doesn't have to be. It all depends on what is going on with your system. With the door, in one case you need to apply a large force over a small distance and in the other case you need to apply a small force over a large distance. In either case the quantity F*d is the same and that's all...
Hmmmm...Now if weapons grade material is as easy to steal as the aforementioned article makes it appear, then it must be pretty easy to get your hands on some radioactive waste. This is disheartening! Hopefully "waste" is not that harmful and the press just makes it sound real dangerous. I...
There are awards given on the internet to people who spend their time scientifically studying inherently silly things (I forget the name of the award). However, somebody proved that beer foam obeys the exponential law of decay! Why you would spend time researching this for your thesis is...