Recent content by Zhivago

Oh yes, of course. The walls are fixed at x = 0, 2L and y = 0, L The walls are fixed, no fluid going through them. All velocities start at 0. If the velocity is (u, v), I should have a system of equations u u_x + v u_y = -p_x u v_x + v v_y = -p_y u_x + v_y = 0 the indices represent...

Hello everyone I'm for the first time trying to model using the Navier-Stokes equations. I want to model a 2D problem where I have an incompressible, non viscous fluid. I have a region (a segment of line) where a force is applied to the fluid. For example: a rectangular box with size 2L x L. In...

Thanks a lot Jason! I just wrote some B field that somehow resembled what i wanted, didn't even check its divergence. I'll try to figure it out now

The distance from the center to point (4,0) must be the same as the distance from the center to the tangent line. You know that the value of x coordiante for the center must be 4 because the circle is tangent to y=0 (the x-axis) at that point! Try to sketch it. Knowing the slope of the...

1 G = 9.81 m/s^2 so 0.05 G = ? yes, u only need to multiply

Thanks for your answer In my case, J is not known (actually it's one of the things I will want to find). B is not uniform , but for a first approximation I would want to find B(x,y,z) = (0 , 0 , B0 + k*z) , B0 >> k It's a constant magnetic field with a small gradient on the top of it. k...

actually it's \frac{1}{2\sqrt{\pi}}e^{-x^2/2} and the integral of e^{-x^2} is \sqrt{\pi},

I'm not very good at particle physics, but I think only charged particles can have an antiparticle. The neutron has an antiparticle, but it is made of different charged quarks.

You need to integrate |psi^2| from x=0 to x=0.01L , from x=0.245L to 0.255L, etc Try to plot psi, |psi^2| and the integral of |psi^2| from 0 to x (remember that the integral is the probabilty of finding the particle in the limits of integration...)

I believe energy has to be conserved. 1/2 m v^2 if you add mass, the velocity will drop

for d) , you have the x,y components of the velocity vector, and you know that tan(teta) = y/x Just imagine it as a triangle. Hope this helps

Correct, the photon has no charge or mass (although it has a spin!), so it can't be deflected. The photon itself is the propagation of a sinusoidal magnetic and electric field.

v0 is a vector doing 25º E (and therefore F) is a vector going in the y direction. You must find the velocity in the x and y component, the force in the x and y component (in this case the x component of the force is 0), and apply kinematic's equation on each component. Hope this helps

Everything in nature just likes to occupy the lowest energy possible. It's called the principle of minimum energy, and is another way to rephrase the 2nd law of thermodynamics. Why it happens, no one knows. Nature is just lazy! :)

Hi acceleration is Force divided by mass Best regards