Recent content by germana2006

What means non equilibrium systems?

In this book, they threat the problem in spherical coordinates (r, \vartheta, \phi) or cartesian coordinates (x,y,z) and the problem proposed here is to resolve in two dimensions only, polar coordinates (only r, \vartheta) or cartesian coordinates (x,y).

The friction force is a tangential force, then if I have to calculate the tangential rotational force, then I have only to calculate the friction force written above?

Homework Statement Considering a unsteady, incompressible flow past a sphere placed in a channel. The sphere is offset somewhat from the center of the flow to destabilize what otherwise would be steady-state symmetrical flow. Calculate the tangencial rotational force at the sphere.Homework...

I have found the problem, it was that I have put while(op<=4) at the end of the first menu instead of at the end of the second menu. When I put it at the end of the second menu, it works. My next step is to try to change the goto loop for one of the other you purpose.

I have done with goto, because I don't know how can I do with other loop.

Hello, I am learning to program in C. I have to do a program for a simple calculator. It should have to menus, one the operation menu with the addition, subtraction, multiplication and division, the second one with the options new calculation, other operation and finish. I have done, there is...

Homework Statement Demostrate: c\cdot (A \times b) \neq (A \times b) \cdot c with A \in\Re^{3 \times 3} is a symmetric Tensor of second order and b,c \in \Re^3 are vectors Homework Equations The Attempt at a Solution (A \times b)_ {ij} = A_{ij} \epsilon _{jkl} b_l

Hello, I am looking for a handbook of mathematics to buy and to look when I need some mathematic help during my PhD instead to look in my students notes. I am looking for this two books, what do you think about them? Which recomended me to buy? Handbook of mathematics: Bronstein...

Homework Statement Considering a rectangular prism bounded by six rectangular faces (x=2, y=0.5, z=1) and a cylinder (r=0.5, heigh h=2) that cut the rectangular prism in x=1 y=0 and z=0 with a inclination of 45 grads in y and z. Which is the area of each faces for the rectangular prism. I...

Could you give me the complete reference of the paper (Percus-Yevick model)? I didn't find.

Could you advise some book to learn about the topic?

I have not idea about this model. I need a explication about it.

What do you know about the hard sphere model? and for this model used for colloids and polimers in fluids?

Homework Statement I have normalized the following function: Q=\int (1-y^2) dx dy Homework Equations using the expression for the normalization \vert N \vert ^2 \vert \int Q^* Q dx dy \vert^2 =1 The Attempt at a Solution then I obtained \int Q^* Q dx dy = x (y-...