Recent content by RadioactivMan

Maybe, r_rXr_thetha is not the right normal vector it could be r_thetaXr_r.

If I have understood your question (my english is not so good). Using energy arguments if the mass brakes in two halfs when the potential energy is max, the potential energy is the same for the half attached to the spring since it just depends on the position of the mass, so the amplitude would...

using the sustitution z=y^(-1) the equation get the form of z`+ (1-2)(-1/x)z=(1-2)(1/x^2) and you can solve As AlephZero said: u=y/x them y=ux them y`= u + xu` them the equation get the form of u+xu`=g(u) them is x(du/dx)= g(u) - u du(g(u)-u)=dx/x int(du(g(u)-u)=int(dx/x)for your equation...

I do not know too much about this but it looks like a Bernoulli differential equation http://en.wikipedia.org/wiki/Bernoulli_differential_equation p(x)=-1/x q(x)=1/x^2 I hope this helps.

By definition the derivative of a function in a point c is lim [f(c+h)-f(c)]/h h->0 If the limit exist we can say that the derivative in point c is the result of the limit, but if a limit exists them the left and right hand limits are equal as chiro said. If you are working on a [a,b]...

It was taught to me as a theorem. Let f and g be two functions such that: 1) lim g(x)=c x->a 2) f is continuos in c then lim (f°g)(x)= lim x->a (f(g(x)))= f(lim x->a (g(x)))= f(c) x->a The proof is very similar to the one in page 146(spanish version) "Calculus" of...

I think that classical mechanics, electromagnetism, thermodynamics, calculus and anything you are going to study for a undergraduate physics degree has been at least for 200 years in books. Maybe, quantum mechanics or a subject in your senior year just 50-100 years, but the point is that it just...

alxm, I think is equivalent to a master in Europe because is a 5 years degree and you need a final thesis to get the degree. fluidistic, vivo en Rosario.

Aquí en Argentina después de la licenciatura puedes seguir con el doctorado( hacerlo aqui o en otro lugar depende de la persona) pero al menos aquí existe el "conicet" es una institución que tiene becarios, es decir te pagan por investigar y además lo normal es que al mismo tiempo den clases en...

I just want to mention these quotes: 1.The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful. Henri Poincaré 2.Physics is...

once in this forum I read this answer to a question involving getting a degree later than average it was like: "even if you go or not for your degree you will be 26 years old, so the only difference would be your degree." I think this answer any kind of question about graduating later than...

hi, I am a student in a university in Argentina, here the time need to get a "Licenciatura"(I think is the equivalent to a master in Europe-not sure about the equivalent in USA ) is 5 years. At the moment I am in the E.E program but the next year I want to start the "Licenciatura" in physics...