# Recent content by Elder1994

1. ### Verify Stokes' Theorem for this vector field on a surface

Hello, I reviewed the problem and I found indeed that the limits that I used were wrong, changing that the answer for both integrals is $6\pi$ !!! Thank you.
2. ### Verify Stokes' Theorem for this vector field on a surface

Hello, I've read all your comments, thanks for answering! I've tried to solve the problem and for the line integral, I used de parametrization: $x = 3\cos\theta, ~y=2\sin\theta$. I also defined my $d\vec r$ as $(-\sin\theta , \cos\theta , 0) d\theta$, after this the line integral (from 0...
3. ### Verify Stokes' Theorem for this vector field on a surface

I do not understand how can I parameterize the surface and area and line differentials.
4. ### Find the electric dipole moment for a water molecule

The equation that we saw in class is for a continuous charge distribution, I think that for this exercise I need to treat the system as a discrete charge distribution but I'm not sure. Also, I don't know how I can calculate the intensity of the electric field needed to move this charge.
5. ### A The Laplacian of the potential q*exp(-r)/r

Hello, I have a problem where I'm supposed to calculate the charge distribution ρ. I need to calculate it by applying the Laplacian operator to the potential Θ. The potential is the function: q*exp(-αr)/r I found on the internet that for this type of potentials I cannot just apply the...