Recent content by Jamoo

JamesR and robphy, thanks. Using normal coordiantes seems to be the way to go. sniffer: yes, by X I meant x dot, I just haven't worked out how to use the equation editor on forum.

The question is as follows: 1) Derive the Equations of motion for this sytem Examine particularly cases a=c=0, and b=0,c=-a (I am not sure whther this applies to part 1 or 2/3) 2) What is the physical system described by the above Lagrangian 3) Write the natural form of the Lagrangian...

Hey guys, I am struggling with this tutorial problem: If you have the following lagrangian: L = m/2(aX^2 + bXY + cY^2) - K/2(ax^2 + bxy + cy^2) (Where captial letters indicate first derivative with respect to time, a,b,c constants) What physical system does it represent? It looks...

I reckon you should just read a Richard Dawkins book. Almost any of them will do, but "The Blind Watchmaker" is his most complete treatise on the different facets of evolution, and many of the arguments against it.

What you say about the things I have studied is true. However, these arguments are not made in a physics sense. The greenhouse effect is perfectly physically sound - Venus is of course a good example of greenhouse gone beserk. However, theory requires observation - here we enter the mire. The...

Yes but in the same vein, all you need is one little HIV bugger who is both well adapted to the medicine (you can bet there are more than only 2 variations of HIV in anyone body), and also well adapted to living in the medicine free evironment. Such a strain would rapidly become dominant, and...

Hi Everyone. I have just read Michael Crichton's new book - State of Fear. I have enjoyed many of his books in the past, as I love the way he combines often very plausible science with a thriller plot (yes I know a lot of his science in his past books is not plausible - and for some reason...