Recent content by FQVBSina

You are correct! But then, what is the definition of the following? $$SVM = sqrt(3/2*\sigma_{ij}*\sigma_{ij})$$ sigma is stress. Previously I thought Svm is Von Mises Stress, but now it might be deviatoric stress, s. Then I am not sure what SVM defined as such is supposed to be.

On Wikipedia for Von Mises stress, it shows the following equation: But this does not work out. If I expand the second term I get: $$ \sigma_v^2 =...

The heat conduction equation for a semi-infinite slab with a boundary condition of the first kind is as follows: The problem is delta is a very small number, so the first exponential will tend to infinity. I am programming this in Fortran and it can accommodate values up to magnitude of 310...

Ok, I have actually found the answer from http://www.bristol.ac.uk/phys-pharm-neuro/media/plangton/ugteach/ugindex/m1_index/med_memb/file/Nernst1.htm. Basically, a convenient way to analyze these equations is to take the log of both sides. Since e takes the natural log and the equations are...

There we go! This is what I was looking for. Work integral is path dependent. Thanks!

The total work is (myforce - friction) x 5 + (myforce - friction) x 5

I am going to stop pushing on it so the friction dissipates the energy and it stops. Then I move to the other side and push the object back.

Ok, I still don't know why you are asking about friction since friction would just be calculated into the net force. But the friction's work would be whatever the friction force is times the total distance (not displacement since friction is not conservative), which will be less than the pushing...

Stopped by friction. As in if I stop pushing then it doesn't move. And friction points in the opposite direction. But friction is a dissipative force

I know that by physics definition if displacement is zero, work is zero. However, if I push an object 5 m to the east, and then move to the other side of the object and push it 5 m back to the west. I think in this case I have always done positive work on the object and hence the total work...

Hello all, This is knowledge needed to solve my take-home final exam but I just want to ask about the definition of Bessel's integrals. This is not a problem on the exam. Wikipedia says the integral is defined as: $$J_n(x) = \frac {1} {2\pi} \int_{-\pi}^{\pi} e^{i(xsin(\theta) - n\theta)} \...

It is exactly as written in the book. Actually, I just figured it out... In an orbit, the r is defined from the center of the inertial frame. So r2 is rotated from r1 but the root of the vector is still at the inertial center. That means delta_r is a tangential vector that connects r1's vector...

Hello all, I have a question regarding the precise definition of angular momentum in orbital motion. I see one definition says angular momentum h, position, r, and radial velocity, r_dot, are related as follows: h = r x r_dot. However, I also see one definition that says h is related to r and...

Additionally, is the following relationship between circular tangential velocity, Vt, orbital speed, Vo, radial speed, r_dot, and flight path angle, Φ, correct? Vt2 + r_dot2 = Vo2 Therefore, Φ = tan-1(r_dot/Vt)

In the case of a satellite orbiting the Earth. Would the relative velocity calculated by the Vis Viva equation the same as the orbital speed of the satellite? If the satellite is in an ellipse, would Vis Viva give the circular tangential velocity Vt=rω, or would it give the orbital velocity...