Homework Statement
Evaluate the electric field of a hollow sphere with a dipolo , in a dialectric. See left figure..
Homework Equations
$$\alpha \vec{p}$$
The Attempt at a Solution
I don't understad why at the field electric "in" there is a term of form $$\alpha \vec{p}$$ , and term $$\beta$$...
Tanks
Some suggest for solving my problem?
my adittion out of radius $$r_0$$ is because there is two field electrics at zone $$r>|r_0|$$, then two potential . I don't am sure of this.
Help please
Homework Statement
Capacitor parallel plates separation $$d$$, potencial diference $$V_0$$, at the center there is a semi sphere of radius $r_0$.
Find the potencial as function of position if $$d>>r_0$$
Homework Equations
I think that relevant equation are Gauss Law
The Attempt at a...
Thanks.
Other Question: There is a places of the world, where, the phd is only a thesis?, without asignatures
Thinking in a phd whit only thesis and permanence of short times
In my opinion, the boock Zettili
Quantum Mechanics: Concepts and Applications, 2nd Edition
is a bock that start from basic concept mathematics and physics, is ideal for some man that do not a complete physics formation..
I don't know the university, since, in Bolivia there is not Phd in physics, and i do not want get out again of my country.
Topics that would be: gravitation, extra dimensions, extensions of general relativity, etc...
There is a place where i could to study a phd physics, where do not exist the need of stay physical at the place?I have 32 years old, i live in Bolivia, i have a master of physics (i studied out of Bolivia) , and one publication on physical review D. By reasons family, i do not want get out...
the problem says:
"consider a particle with orbit
##r(\phi)=\frac{r_0}{1-\epsilon \cos (\beta \phi)}##
##\epsilon \in ]0,1[## and ##\beta=cte##
a) Find the precession angle.
b) What is the condition to the trayectory is totally cyclic??
__________________
I don't understand why i calculare...
I am reading about the Asimov pendulum (see figure)
The aceleration in spherical coordinates is
##\vec{a} =( R \dot{\theta}^2 - R \omega^2 \sin ^2 \theta) \hat{r} + (R \ddot{\theta} - R \omega ^2 \sin \theta \cos \theta ) \hat{\theta} + (2R \dot{\theta} \omega \cos \theta) \hat{\phi}##
The...
Is correct the following procediment?
## A \sin (\omega t) = A \sin (\phi) \to \phi= \sin^{-1} \sin (\omega t )##
Is correct to say that ## \phi = \omega t## is oscillatory in this case ??
sss
this is my graph, but, at the lagrangian the solution is ##\theta=\omega t## but, my teacher says that the solution must be ##\theta## oscillatory.
I Says that the length of the proyection cycloid is oscillatory ## ds/d\theta = \sqrt{(dx/d\theta)^2+(dy/d\theta)^2}## but, the x...
the coordinates of cycloide are
##x= a (\theta- sin \theta)##
##y= a(cos \theta -1)##
If i use ##\theta =\omega t## this is a example of cycloid
but, if i use ##\theta=\cos (\omega t)##, ¿this is a cycloid?
My teacher says that in a cycloid pendulum ##\theta## must be oscillatory...